SEFUSE™
Contents
1. Note 1 Part numbers are for standard lead devices For long leads add the number 1 at the end of part number 2 Th approved by BEAB is 189 for SF214E and 190 for SF226E and SF240E 3 Tm approved by UL is 240 C Tm approved by CSA is 330 4 The electrical ratings by safety standards are as follows Rated Voltage Japan CSA 15A Inductive ACIDS 20A Resistive AC240V 15A Resistive 10A Resistive 15A Inductive AC250V 15A Resistive Resistive 17A Resistive AC277V 15A Resistive 5 SF169E SF188E SF214E SF226E and SF240E has a recognition of CH rating by UL 6 The number in parentheses are provious number Both number can be inquired E Ratings emperature Temperature SF 70Y 70 2 SF TOY D 20 or SF 76Y TEE SF 91y JES Fay D i A SF 96Y 96 210 SF109Y 113 0 109 33 332 SF119Y 121 C 119 2 C 33 333 E 1747 SF129Y 133 0 129 2 0 AC250V SF139Y 139 2 0 SF152Y 152 210 TT 33 334 SF169Y 169 E 33 335 SF188Y 188 C 33 336 SF214Y 214 10 33 549 SF226Y 226 Ju 33 354 SF240Y 237 210 Note 1 Part numbers are for standard lead devices For long leads add the number 1 at the end of part number All the parts and materials don t contain lead Pb Cadmium free contact types are available Please contact us type SEFUSE SM A Series E Dimension Unit mm lt J St2. November Z NA December Last digit of year E Ratings 1 Part Number Rated Functioning Temperature Te Tf Operating Temperature Rated Voltage Tm Im Current 2 E71747 172780 a gt F LV AC250V LR52330 Resistive 2 CP SM072A0 1 SM095A0 SM134A0 SM145A0 SM164A0 SM182A0 Licence No 117275 Note 1 Part numbers are for standard devices For long leads change the last number from 0 to 1 2 SM072A has C UL recognition 3 The number in parentheses are provious number Both number can be inquired E Ratings Rated Functioning Temperature TE Tf Rated Voltage Operating Temperature VDE Current File No 6778 2 172780 4171 2001 CH AC250V LR52330 0004 Licence No 117162 LV2618 0045039 Resistive 2000 SM130B0 SM134B0 SM145B0 Note 1 Part numbers are for standard devices For long leads change the last number from 0 to 1 2 Tm approved by CSA is 155 C 3 The number in parentheses are provious number Both number can be inquired E Ratings 1 Part Rated Functioning Temperature TE Tf Operating Temperature Im Current Rated VDE Number Voltage CP CP File No 6778 2 172780 4171 74747 LR52330 0003 Licence No 117163 SM095G0 SM110G0 SM126G0 SM130G0 SM134G0 139 SM145G0 150 Note 1 Part numb
3. SF 0Y Operating Temperature CP Part Number Insulation Resistance after Operation MO NI Initial Characteristics SM145A0 Withstand Voltage after Operation kV Internal Resistance mQ 25 mm SF139E amp SF139Y SF109E amp SF109Y SF 0E amp SF 0Y SM130A0 SM126A0 SM110A0 10 10 10 3 0 2 0 1 0 Part Number Change of Operating Temperature CP E Aging Test SM145A0 100 1 000 10 000 Time Hours SM095A0 D 10 10 10 3 0 2 0 1 0 D SM130A0 SM126A0 SM110A0 Operating Temperature CP Part Number Insulation Resistance after Operation MO Withstand Voltage after Operation kV Internal Resistance mQ 25 mm SM095A0 Part Number Change of Operating Temperature 100 1 000 10 000 Time Hours Note The values following are the storage temperature Performance Data SM B Series Temperature Rise Response Time SEFUSE sec 30 S M095B0 SM110B0 SM126B0 SM130B0 SM145B0 NO O Temperature Rise O Time for opening after immersion into oil 10 20 30 40 50 C 0 1 2 3 A Temperature Difference oil temp minus operating temp Current p p 9 p SM G Series E Temperature Rise Response Time C sec 10 SM095G0
4. conditions by us They are not guaranteed and are for reference only The information herein is based on the documents as of April 2001 and is subject to change without notice Therefore it is recommended to refer to latest individual information such as drawing for mass production designing lt is prohibited to reprint or copy the contents herein without written agreement of NEC SCHOTT Components Corporation lf problems relevant to the industrial property of third parties occur by using the products we would not assume any responsibility for matters other than ones directly related to the manufacturing process which please note Although we have been making continuous efforts to improve the quality and reliability of our products the possibility of defects cannot be eliminated entirely Therefore when using our electronic component products please make sure to consider safety measures in its design such as redundancy fire containment and malfunction prevention against physical injuries fire disasters and social damages in consideration of the said defect occurrences Our products are classified into 2 quality grades Standard and Special The recommended applications of the products according to its quality level are indicated below If you intend to use our products for applications other than Standard level please make sure to consult with our sales representative in advance Standard Computers office equipment commu
5. on the resin sealed side to the opposite lead so that the thermal cutoff cannot break the circuit Note that the body of the SF type is the same in potential as the circuit Therefore it must be electrically isolated from the other metalic part Storage The body and lead A of SF type and the leads of SM164A and SM182A are silver plated Therefore these parts may discolor because of sulfuration In the case the marking of the body will become difficult to discriminate or the solder ability of lead will decline To avoid this the SEFUSE should not keep around materials Such as cardboard or rubber etc which generate sulfurous acid gas When the SEFUSE have to be storaged in a cardboard box the SEFUSE s packs should be put into other bags such as polyethylene and make sure the packs seal Recommendation Be careful when mounting the thermal cutoff because external force heat or a harmful atmosphere containing excessive humidity or sulfurous acid gas may damage the characteristics of the thermal cutoff If applicable it is recommended to warn general consumers who are not aware of the usage cautions for the thermal cutoff not to mount remove or replace the thermal cutoff through a note to this effect in the user s manual and other related material If you desire any clarifications or explanations regarding these cautions please contact us The values contained in this document were obtained under certain testing
6. operating temperature Malfunctions may also occur Even if the thermal cutoff s operating temperature is exceeded it may malfunction Table 1 SM Type SF Type Type fen ae Type SM072A SE OE Y SM095A B G SF 76E Y SM110A B G SF 91E Y SM126A B G SF 96E Y SM130A B G SF 109E Y SM134A B G SF119E Y SM145A B G SF 129E Y SM164A SF 139E Y Body Temperature Temperatures listed in the table 1 aren t ambient temperature but body temperature of a thermal cutoff A life of a thermal cutoff is subject to a temperature experienced Every temperature rating has different 15 SM182A SF 52E y SF GSS Y SF 188E Y SF214E Y SF 226E Y SF 240 Y characteristics and the life tends to shorten if the thermal cutoff rating is too close to the temperature experienced Therefore design engineer must take the life of thermal cutoff and an application into consideration The body temperature of the thermal cutoff becomes higher as current passes through and might rise higher than the ambient operating temperature see test data The temperature may rise even higher depending on the mounting method and other conditions Therefore after mounting the thermal cutoff under the same conditions you would use for the actual application work the final product and measure the body temperature of the thermal cutoff Use the thermal cutoff with a voltage and current level lower than the rated level If the thermal cu
7. How to read a lot number ex 01 4 1 SEF US E Brand Name T Sub lot oo S FI1L390E Part Number number ede p01 41 Lot Number Month X October Tf 142 C Rated Functioning Vee November MITI 10A Temperature Z December Approved 250 VO Rated Current i Mark Rated Voltage Last two digit of year 0 Factory Code represents the factory location as shown below Japan none Thailand B SF Y Series E Dimension Unit mm i i i l 20 35 as 1 A 35 Note The dimensions for long lead devices are in parentheses How to read a lot number Markin en x 014 1 S E F U S E Brand Name L Sub lot Mak S F 13 9 Y Part Number number ya p 0141 Lot Number Month ark A are October Y 1 4 2 C Rated Functioning Y November MITI 15 A Temperature Z December Approved 250V Rated Current Last two digit of year Mark L E Rated Voltage A E Ratings 1 Rated Functioning WY Operati Rated Rated Part Tent erature BEAB CCIB Number TH Tf Current Voltage Made in CP Thailand 33 835 SF 70E 73 70 2 SF 76E 77 769 SF 91E 94 91 SF 96E 99 96 2 SF109E 109 3 SF119E 119 2 4 SF129E 129 2 y SF139E 139 2 10A SF152E 152 2 Made in SF169E 169 icence No Thailand SF188E 188 SF214E 214 SF226E 226 SF240E E 1747 Resistive
8. O9002 quality standard Features Excellently sensitive to ambient temperature Stable and precise operation One shot operation Wide choice of types to suite the application SF or SM SF types has ceramic pipe to protect sealing resin from the stress when bending the leads Meets many safety standards Cadmium free and Lead free SF is available E Applications 0 Irons hair dryers heaters Refrigerators rice cookers water pots coffee makers 0 Air conditioners ventilation fans electric fans gas boilers Transformers power suppliers adaptors solenoides Chargers battery packs Copiers laser beam printers power taps Rice cooker For the purpose of photography the insulation tube of the thermal cutoff has been removed In reality the thermal cutoff is covered by the insulation tube Iron Application Examples Transformer gt SEFUSE Construction The SF type uses an organic thermosensitive pellet inside a metal case It features a large cutoff rated current of 10 A or 15 A Before Operation After Operation Ceramic SpringB Thermal Pellet Metal Case Spring B Thermal Pellet Sealing Resin Ceramic Pipe Spring A Sliding Disks Metal Case Spring A Sliding Disks Contact Contact The SF type contains a sliding contact springs and a When the ambient temperature rises to the SEFUSE thermal pellet inside a metal case When spring B is operating temperatu
9. SM110G0 SM126G0 7 SM130G0 2 D SM145G0 ao z 22 2 SM095G0 w 2 6 SM126G0 5 og SM130G0 5 O o SM145G0 E E EE 10 0 0 1 2 3 A Temperature Difference oil temp minus operating temp Current 11 w Initial Characteristics SM145B0 SM130B0 SM126B0 SM110B0 SMO095B0 Part Number Operating Temperature CP Insulation Resistance after Operation MO Initial Characteristics SM145G0 SM130G0 SM126G0 SM110G0 Withstand Voltage after Operation kV Internal Resistance mQ 25 mm E Aging Test SM145B0 SM130B0 15 010617 SM126B0 co 5 43 AF SM110B0 m 5 15 75 SM095B0 lt 5 SM095G0 Part Number Operating Temperature Insulation Resistance after Operation MQ Withstand Voltage after Operation kV Internal Resistance mQ 25 mm Change of 100 1 000 10 000 Part Operating Number Temperature Time Hours TP Note The values following are the storage temperature E Aging Test SM145G0 SM130G0 SM126G0 90 SM110G0 15 75F S M095G0 0 Change of 1 000 10 000 Part Operating Number Temperature Time Hours CP Note The values following are the storage temperature 12 SEFUSE 13 Definition of Terms Rated Functioning Temperature Rated function
10. To NEC SCHOTT SEFUSE THERMAL CUTOFF NEC SCHOTT Components Corporation Contents SEFUSE Introduction Features Application DOO000000000 2 0 Construction OOOO 0000000000005 3 Standard Ratings KIONA NAA AAA NANA NANA NAA 5 0 Performance Data 0000000000000000 9 0 Definition of Terms CAAANAAANAAAAAKEANAAENAA 13 0 Lead Cutting and Taping OOOOOOOOOOOOOCOOO0 14 e Cautions QOCUCOOOC0U CCC 15 Please be sure to read the Cautions on pages 15 through 18 before using Series Rated Current Rated Functioning Temperature 15 10A 73 CQ 240C 73m0 240 760 187 1000 150 1000 150 Select optimum series according to temperature and electrical ratings m m Safety standards TACTO Japan BEAB CCEE CCIB SEFUSE Thermal Cutoff SEFUSE is a compact and reliable thermal cutoff designed to protect domestic electrical appliances and industrial electrical equipment from fire Cutoff occurs and an electrical circuit opens when ambient temperature increases to an abnormal level Two SEFUSE types are available The SF type uses an organic thermosensitive material as the thermal pellet and its operating temperature range is 73 C to 240 TC The SM type uses a fusible alloy and has an operating range of 76 C to 187 CL SEFUSE is manufactured in Japan and Thailand and both factories are ceritified by the International Standards Organization ISO for the ISO9001 or IS
11. andard Ratings 85 145 Note The dimensions for long lead devices are in parentheses E Marking SJE F US E SM126A0 MITI Approved Mark Tf oe Rated A 250V Current SM B Series E Dimension Unit mm Brand Name Part Number Lot Number Rated Functioning Temperature Rated Voltage 39 5 69 5 oe 39 5 69 5 85 145 gt Note The dimensions for long lead devices are in parentheses E Marking SVE F U S E SM130B1 MITI Approved Mark Tf Weck Rated A 250V Current SM G Series E Dimension Unit mm Brand Name Part Number Lot Number Rated Functioning Temperature Rated Voltage 40 70 le 5 d 53 90 53 Y Y 85 145 Note The dimensions for long lead devices are in parentheses E Marking MITI VW SEFUSE Brand Name Approved Mark 110GO0O Part Number Lot Number 4 2 Tf 115 C Rated Functioning Temperature Rated 0 5A 250V Rated Voltage Current How to read a lot number ex 1 4 0 i RE Sub lot number Month NE October YOANI November ZEATE December Last digit of year How to read a lot number ex 1 4 0 YA IE Sub lot number Month gt E October VAN November Zam December Last digit of year How to read a lot number ex 1 4 0 i E Sub lot number Month XTY October VAA
12. d Tc in the BEAB standards Tm Tm Maximum Temperature Limit Maximum temperature limit is the temperature up to which thermal cutoffs will not change its state of cutoff without impairing It is represented by the symbol Tm in the UL standard and by Tm in the CSA VDE and BEAB standards Lead Cutting and Taping SEFUSE The following lead cutting and taping are available as your request E Applicable Preducts Standard lead type Long lead type SM AO SM BO SM GO SF E 1 SF Y 1 Taping Lead Cutting Lead Forming E Taping reel gt ani g AKA S t SF 2000pcs reel SM 2500pcs reel E Lead Cutting SF Type Li 70 30 La 70 33 mm Li L2 SM Type J Oo Li La 70 33 mm Li p L2 l Lead Forming A A __A A Shoud be over 5 mm For more information on dimensions not described in diagrams above please contact us 14 Cautions SEFUSE This section describes cautions designed to protect the performance of the thermal cutoff Be sure to read and fully understand these cautions To obtain full performance from the thermal cutoff it is necessary for the customer to appropriately store the thermal cutoff design appropriate circuits for the application and perform evaluations mounting and testing as necessary Problems arising from the inappropriate executio
13. ers are for standard devices For long leads change the last number from 0 to 1 2 SM G series has following recognition of DC rating by UL SM095G 3 A DC 50 V SM110G SM126G SM130G SM134G SM145G 5 A DC 50 V 3 The number in parentheses are provious number Both number can be inquired 100 115 131 135 95 3 1102 2 126 2 130 2 134 3 145 2 2001 LV2618 0 5 A AC250V Resistive Lead Pb free lead types are available Please contact us Fusible alloy doesn t contain cadmium except SM144 Performance Data SF E Series SF Y Series Temperature Rise Response Time SEFUSE C 40 sec SF E 30 SF Y 40 30 20 Temperature Rise N O Time for opening after immersion into oil 10 YA 0 10 20 30 40 Q j 0 5 10 15 20 Temperature Difference oil temp minus operating temp Current SM A Series E Temperature Rise Response Time sec 30 SM095A0 A SM110A0 _ SM126A0 2 A SM130A0 7 SM145A0 7p or ao 20 vs D S 5 o c o a0 We a 2 fa 2 H W O i aa XY WY XY Q OONN SOGGY 0 10 20 30 40 50 C 0 1 2 A Temperature Difference oil temp minus operating temp Current w Initial Characteristics SF169E amp SF169Y SF139E amp SF139Y mw Aging Test SF169E amp SF169Y SF109E amp SF109Y S F96E amp SF96Y SF 0E amp
14. ing temperature is the operating temperature of thermal cutoffs measured using the method specified in the safety standard In present E A M C Electrical Appliance and Material Control Law of Japan the operation should be within the specified operating temperature range of 7 In various standards such as UL CSA VDE and BEAB which comply with the IEC standard it is called the rated functioning temperature and should operate within the prescribed temperature range of 0 10 It is represented by the symbol Tr in the UL standard and by the symbol Tf in the CSA VDE and BEAB standards In SEFUSE a temperature that complies with both standards is set as the rated functioning temperature and is indicated on the body of the thermal cutoff Operating Temperature Operating temperature is the actual operating temperature range when the thermal cutoff is made to operate inside a constant temperature oven whose temperature is raised at the rate of 0 5 to 1 C min while a detection current of 10 mA or lower is applied The operating temperature is a standard set by ourself and is not specified by a safety standard TH Th Tc Holding Temperature Holding temperature is the maximum temperature at which when applying a rated current to the thermal cutoff the state of conductivity is not changed during specified time not hess than 168 hours 1 week It is represented by the symbol TH in the UL standard Th in the CSA standard an
15. n of the above are the responsibility of the customer and we declines any and all responsibility Design Cautions Do not use this device for and purpose other than as a thermal cutoff The thermal cutoff is designed to detect abnormal rises in temperature and break circuits if needed It is not a current fuse that cuts excess current If used as a current fuse the SEFUSE may malfunction Do not use this device in aerospace equipment aeronautical equipment nuclear reactor control systems life support equipment or systems transportation machinery engine control or safety related equipment This device is designed for use in household electric appliance office automation equipment audio and video equipment computer communications equipment test and measurement equipment personal electronic equipment and transportation equipment excluding engine control The customer should select the proper thermal cutoff device mounting location and mounting method as appropriate for each application Verify whether the chosen selections are appropriate by repeatedly testing the final design for thermal cutoff under normal conditions as well as under predicted maximum abnormal conditions Make designs so that the temperature of the body of the thermal cutoff does not exceed the temperatures shown in Table 1 If the temperature is exceeded on a regular basis the thermal cutoff may start operating only at temperature lower than the normal
16. nication equipment measuring equipment audio amp visual equipment home electric appliances machine tools personal electric equipment and industrial robots etc Special Transportation equipment automobiles trains ships and others aircrafts aerospace equipment medical equipment for life support etc 18 Minakuchi Plant 3 1 Nichiden Minakuchi cho Koka gun Shiga 528 0034 Japan TF Division TEL 0748 63 6629 FAX 0748 63 6627 E mail tf_scm mua biglobe ne jp Headquarters Otsu dalichiseimei Bldg 3F 3 1 8 Chuo Otsu shi Siga 520 0043 J apan TEL 077 510 8480 FAX 077 510 8479 Tokyo Office 7 honshio cho Sinjuku ku Tokyo 160 0003 J apan TEL 03 5366 2443 FAX 03 3358 8648 http www nec schott co jp NEC SCHOTT NEC SCHOTT Components Corporation December 2001 E010
17. re the heat transferred through the compressed firm contact between lead A and the sliding metal case melts the thermal pellet When the thermal pellet contact occurs At normal temperatures current flows melts springs A and B expand moving the sliding contact from lead A to the sliding contact and then through the away from lead A The electrical circuit is opened by metal case to lead B breaking contact between the sliding contact and lead A Before Operation Fusible Sealing Ceramic Case Alloy Resin Sealing Resin Lead Flux Lead In the SM type leads are connected by a fusible alloy The current flows directly from one lead to the other The fusible alloy is coated with a special flux The SM type uses a fusible alloy inside a ceramic case It has a cutoff rated current of 0 5 A 1 A or 2 A Because of its insulated case the SM type can be attached directly where temperature detection is required After Operation Fusible Alloy Lead Flux Lead When ambient temperature rises to the SEFUSE operating temperature the fusible alloy melts and condenses into a drop around the end of each lead because of surface tension and the coating of special flux The electrical circuit then opens Sy py Standard Ratings sie SF E Series E Dimension Unit mm SEFUSE I 01 0 20 35 s 11 d 35 66 81 Note The dimensions for long lead devices are in parentheses E Marking
18. rmal operating temperature range The thermal cutoff also may not operate even if the thermal cutoff s operating temperture is exceeded 16 17 Cautions SEFUSE Mounting SEFUSE can be mounted by soldering caulking or welding It is recommended that the connecting position at the lead of resign sealed side should be 5 mm or more from the body of the thermal cutoff SF Type SM Type T p connecting connecting position position 5 mm or more 5 mm or more 5 mm or more If soldering note that the thermal cutoff may not function because of excessive solder temperature To prevent such malfunctions for example holding the lead near the case by a tool is effective for allowing the heat to escape and the soldering should be done in short interval Another effective method is to use a lower solder temperature and to solder at a location that is distant from the case If caulking or welding be careful to keep the resistance value of the connecting section low If the connecting section has a high resistance value the passing current may generate an abnormally high temperature that will cause the thermal cutoff to operate break the circuit After mounting the thermal cutoff be careful not to apply force that may pull push or twist the lead wires If using an SF type thermal cutoff be sure not to make the lead on the resin sealed side touch the case This would cause the current to flow from the lead
19. toff is used with a voltage or current level higher than the rated level contacts may melt in the SF type causing the fuse to malfunction In the SM type the body of the thermal cutoff may be destroyed Do not use the thermal cutoff in water organic solvents or other liquids or environments containing sulfurous acid gas nitrous acid gas or high humidity Doing so will cause deterioration of the sealing resin the thermal cutoff may operate at lower than operating temperature or any other malfunctions may occur Also the thermal cutoff may not operate even if its operating temperature is exceeded Lead wire process When bending the lead wire in order to protect the resin seal from excessive pressure secure the lead wire close to the case and bend the part beyond the secured section 3mm or more Secured Secured The lead wire should be bent at a distance 3 mm or more from the body of the fuse and should not be twisted The tensile strength applied to the lead wire should be 5 kg or less for the SF type and 1 kg or less for the SM type The strength applied to the body of the thermal cutoff should be 10 kg or less for the SF type and 5 kg or less for the SM type sE 10kgt0 SM Skgff 0 8 steel wire a In the case of an SF type deformation of the case may change the location of the moving electrode during operation and may cause the thermal cutoff to operate only at temperatures lower than the no
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