2024-2026 Year Version.

For more information, please contact SETsafe | SETfuse: sales@SETfuse.com.

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.

Heat CutOff (HCO) is a three-terminal fuse designed to respond to over-current or over-charge conditions. It consists of several components, including Sealant Epoxy, FH, Fusible Alloy, Flux Resin and Case.

The Heat CutOff (HCO) is primarily utilized in the secondary protection of lithium battery charging and discharging circuits. It acts as an additional protection element in conjunction with the primary protection circuit. During the charging and discharging process of lithium batteries, the Heat CutOff (HCO) is triggered when there is an occurrence of over-current or over-charge, effectively reducing the risk of fire or explosion. When the circuit current surpasses a specific threshold, the fusible alloy within the Heat CutOff (HCO) heats up and fuses, causing the protection circuit to be passively disconnected. Similarly, in cases of primary protection circuit IC or main circuit FET failure during over-charging, the secondary protection IC activates the FET connected to the Heat CutOff (HCO). This, in turn, activates the heating resistor (FH) within the Heat CutOff (HCO), generating heat to actively melt the fusible alloy. This action disconnects the charge and discharge circuit while simultaneously cutting off the Heater circuit. This dual protection mechanism safeguards against both over-current and over-charge situations.

The SETsafe | SETfuse Heat CutOff (HCO) SHJ series offers several key features. It has a rated current of (12 / 15 / 22 / 30) A, a rated voltage of (48 / 80) VDC, and an operating voltage range from 3.0 to 47.0 VDC. It is RoHS and REACH compliant.

Product Schematic

l  P1 ~ P2 Main Circuit（MC）

l  P1/P2 ~ P3 Control Circuit（CC）

● Surface Mount

● Overcurrent Protection

● Overcharging Protection

● Low Impedance, Low Power Consumption

● Controlled Fusing Time ≤ 60 s

● Non-Resettable 

● RoHS & REACH Compliant

Surface Mount

PCB Mount, Welding

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

HCO_SHJ series_3D_SETsafe & SETfuse.zip

● Electric Tool

● Storage Battery

● Portable Power Supply

● Electric Motorcycle

● Electric Bicycle 

● Household Energy Storage

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..

Process:

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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