Technical Details of SEFUSE®

The operating principle of thermal links is based on the concept that the thermal element will melt and shut off the electrical current in the event of the ambient temperature reaching a hazardous level. SCHOTT offers a wide selection of thermal links covering a full range of operating temperatures and rated currents.

Features of SEFUSE® Thermal Links

Options for every application

SCHOTT offers a wide range of thermal links with rated current from 0.5-15A and operating temperature from 73-240℃, enabling customers to make a selection optimized for exact application requirements.

Eco-friendly

SEFUSE® thermal links do not contain hazardous substances and comply with WEEE and RoHS standards. In addition, the sliding contacts of SEFUSE® SF-type thermal links are made of an environmentally-friendly silver copper oxide (AgCuO) material that's patented worldwide.

Excellent temperature rating

The SFH/R series has high Tm (maximum temperature limit) and delivers excellent insulation performance at high temperatures thanks to a thermal pellet using innovative new materials.

SEFUSE® thermal links product table

There are two SEFUSE® types: SF and SM. The SF-type uses thermosensitive material as the thermal pellet, while the SM-type uses a fusible alloy.  Both types are suitable for a wide range of applications. 

SEFUSE Thermal links Product Table

SEFUSE® thermal links SF type - Ratings

English _SEFUSE Thermal links data table SF1_2.png

SEFUSE SF type Ratings

* BEAB Certification Non-Renewal
BEAB certification, which had been obtained for some series of SEFUSE® thermal links, will not be renewed after the expiration date of February 2022.

* About CCC Self-Declaration number
Due to the publication of new implementation rules from the Certification and Accreditation Administration of the People’s Republic of China (CNCA), the authentication method of thermal links was changed to CCC Self-Declaration (Index No. 2019-1571296947171 / Document No. 2019 No. 44). SCHOTT SEFUSE® thermal links that had acquired CCC certification have completed the conversion to the CCC Self-Declaration accordingly.

* CCC Certification : Update GB/T9816.1-2023 Standard
The applicable standard of CCC certification for SEFUSE® thermal fuses has been updated to GB/T9816.1-2023.The self-declaration number remains unchanged.

 
Series Old Certification No. Self-Declaration No.

SF/R series

2013010205600209

2020970205000025
SFH/R series 2013010205613895

2020970205000045

SF/K series

2008010205282881 

2020970205000038 

SF/Y series 

2020000205000015 

 

Note

  1. Except for SF265R, no use of hazardous substances prescribed by WEEE and RoHS. All products do not use SVHC prescribed by REACH (241 substances, 27th Jun, 2024).
    • SF/R series & SFH/R series: For standard lead length type, add the suffix “0“ at the end of the part number. For long lead length type, add the suffix “1“ at the end of the part number.
    • SF/Y series: Part number indicates thermal links with standard lead lengths. For long lead length types, add the suffix “-1” at the end of the part number.
  2. Th is the maximum temperature measured on the thermal link when it continues to conduct a rated current without changing its state of conductivity for 168 hours.
  3. The electrical ratings according to the various safety standards are shown in the following table.
  4. Rated Voltage UL/cUL VDE CCC KTL PSE 6)
    AC120V 20A (Resistive) - - - -
     AC250V 10A (Resistive)  10A  10A  10A  10A
    15A (Resistive)  15A  15A  15A  15A
    16A (Resistive)  -  -  -  -

    • SF/R series: The following SF-types have passed the Conductive Heat Aging Test (CHAT) specified by the UL safety standard: SF113R*, SF129R*, SF139R*, SF144R*, SF150R*, SF167R*, SF184R*, SF188R*, SF214R*, SF229R*, SF240R, and SF265R*.
    • SFH/R series: The following SF-types have passed the Conductive Heat Aging Test (CHAT) specified by the UL safety standard: SFH124R*, SFH162R* and SFH172R*.  
    • SF/K series: The following SF-types have passed the Conductive Heat Aging Test (CHAT) specified by the UL safety standard: SF167K, SF188K and SF214K.
    • SF/R series: With respect to the PSE standard, SF/R is separately available for 10 A and 15 A ratings. Please select the appropriate product rating according to the specifications of the final application.
    • SFH/R series: With respect to the PSE standard, SFH/R is separately available for 10 A and 15 A ratings. Please select the appropriate product rating according to the specifications of the final application.
  5. In case of requests for 10 A rated current thermal links, please add “J1” after the part number (name). i.e. SF***R0 J1, SFH***R0 J1
  6. The following electrical ratings were used for the UL, VDE, and KTL safety standards: 10 A (Resistive)/AC 250V.
  7. Pending approval.

 

 

 

 

 

 

 

 

 

 

SEFUSE® thermal links SM type - Ratings

SEFUSE SM type

* BEAB Certification Non-Renewal
BEAB certification, which had been obtained for some series of SEFUSE® thermal links, will not be renewed after the expiration date of February 2022.

* About CCC Self-Declaration number

Due to the publication of new implementation rules from the Certification and Accreditation Administration of the People’s Republic of China (CNCA), the authentication method of thermal links was changed to CCC Self-Declaration (Index No. 2019-1571296947171 / Document No. 2019 No. 44). SCHOTT SEFUSE® thermal links that had acquired CCC certification have completed the conversion to the CCC Self-Declaration accordingly.

 

 

Series Old Certification No. Self-Declaration No.
SM/A series

2002010205023067

2020970205000026

SM/B series 2002010205023066

2020970205000019

SM/G series

2012010205547628

2020970205000044

 

 

 

Note

  1. No use of hazardous substances prescribed by WEEE and RoHS. All products do not use SVHC prescribed by REACH (241 substances, 27th June, 2024).
  2. For standard lead length type, add the suffix “0” at the end of the part number. For long lead length type, add the suffix “1” at the end of the part number.
  3. DC ratings are approved by UL and VDE.
  4. SM072A* has c-UL recognition.
 

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