SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
idea Thermal CutOff (iTCO)
  • idea Thermal CutOff (iTCO)
  • JSxxx-R series ×
JSxxx-R series

MC Rated Current (Ir):  60 A

MC Rated Voltage (Ur): 150 VDC

MC Rated Current (Ir):  80 / 100 A

MC Rated Voltage (Ur): 100 VDC


CC Rated Voltage (Ur): 12 / 24 / 36 / 48 / 72 VDC

Rated Functioning Temp. (Tf): 150 ℃


2024-2026 Year Version.

When purchasing 2024-2026 version products, please refer to the data below. If the product you have been traded in is the 2021-2023 version, but you want the latest updated version of 2024-2026, please consult sales.

iTCO JSxxx-R_SETsafe & SETfuse.pdf

2021-2023 Year Version.

While purchasing 2021-2023 version products, please refer to the data below.

iTCO JSxxx-R_SETsafe & SETfuse.pdf

Datasheet (PDF Document) Include: Specifications, Agency Approvals, Packaging, Structure Diagrams, Glossary, Part Numbering System, Installation, Usage, Replace, Storage and other information.


Xiamen SET Electronics Co., Ltd.


idea Thermal CutOff (iTCO) is a fuse that uses low melting point alloys as the electrical connection point of the main circuit, with built-in heater as the control circuit, to achieve controlled fusing function. idea Thermal CutOff (iTCO) is consist mainly of Thermal Element, Electrode, Flux Resin, Feed Heater, Alloy Thermal-Link and Lead wire, sealed in plastic or ceramic housings.


idea Thermal CutOff (iTCO) is mainly used in the protection of new energy security, and secondary protection for charging and discharge circuits. idea Thermal CutOff (iTCO) mainly uses two electrodes which are connected with the thermal element of the fusing elements as electrical connections with passive temperature-sensing fusing actions. At the same time, Built-in heater with independent over-temperature protection heats the thermal element, provides sufficient heat to the fuse, cuts off the main circuit and disconnects the control circuit to achieve self-protection.


SETsafe | SETfuse idea Thermal CutOff (iTCO) covers Rated Current from 20 to 270 A, Rated Voltage from 80 to 500 VDC, Rated Functioning Temp. 136 to 150 °C, with UL, cUL, TUV Approvals and RoHS, REACH compliant.

Structure Diagrams

JS-R 剖视图-_画板 1.jpg

Product Schematic

JS schematic.png

P1 ~ P2 Main Circuit (MC) 

P3 ~ P4 Control Circuit (CC)


● Low Impedance, Low Power Consumption

● Fast Response Clearing Time ≤ 20 seconds

● Non-Resettable

● Active Control

● Over Temperature Protection

● Self-Control Protection

● RoHS & REACH Compliant

Mounting Style

Stud, Soldering

3D of Product Structure

You can download the 3D diagram of product structure to help you improve design efficiency to create more great products.

iTCO_JSxxx-R series_3D_SETsafe &


● Battery Control Unit Fail Protection

● High Power Solid State Relays

Technology Applications Markets Applications

Design Standards & Agency Approvals


The following certificates (PDF Documents) are only used for browsing on the web to prove the product has been certified. If you need a full version certificate, Please contact:

The following is part of the product certification, not the entire product certification.

Agency Approvals for ATCO2


UL (America):

Standards: UL60691

File No.: E214712

UL_iTCO_JS150-RxN-LKZ&JS150-RxN-MKZ&JS150-RxN-PKZ&JS150-RxN-QHZ&JS150-RxN-RHZ_SETsafe & SETfuse.pdf

cUL (Canada):

Standards: CAN-CSA-E60691

File No.: E214712

cUL_iTCO_JS150-RxN-LKZ&JS150-RxN-MKZ&JS150-RxN-PKZ&JS150-RxN-QHZ&JS150-RxN-RHZ_SETsafe & SETfuse.pdf

Quality Assurance

iTCO Quality Assurance

For product quality, our goal is to be industry-leading. We ensure that the quality of the product meets the expected goals from the following process.

Quality Policy.

Qualified Supplier of Raw Materials.

Incoming Quality Control (IQC):

Acceptance Quality Limit (AQL), Dimension, Function, Visual Inspection, RoHS & REACH Test. etc..


Online Inspection and Function Test 100%, etc..

In Process Quality Cortrol (IPQC): AQL, Dimension, Function, Visual Inspection, etc..

Final Quality Control (FQC):

AQL, Dimension, Function, Visual Inspection, RoHS & REACH Test, etc..

Reliability Test:

AQL Sampling Test.

Outgoing Quality Control (OQC):

Packaging, Labeling, Quantity Inspection, etc..

Agency Information:

Safety Certificate Agency Annual, Quarterly Audits. Include UL, cUL, VDE, TUV, KC, PSE, CCC. etc..

Quality Management System:

TUV Approved and Issued Certificate.


SETsafe | SETfuse

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