Xiamen SET Electronics Co., Ltd.

idea Thermal-Link (iTCO) consist mainly of Thermal Element, Flux Resin, Electrode and Feed Heater(FH), sealed in plastic or ceramic housings. The two electrodes are connected with the thermal element of the fusing elements as electrical connections with passive temperature-sensing fusing actions. At the same time, a Feed Heater (FH) with independent over-temperature protection is built-in to heat up the thermal element, provide sufficient heat to the fuse & cut off the electrical connection points. In accordance with requirements, auxiliary remote trigger signals can be added to provide switching signals. Covers rated   current (20 to 200) A, rated cut-off temperature (102 to 150) °C, compliances with RoHS, REACH requirements. 

iTCO

idea Thermal-Link

After receiving control signals to fuse the protector.

TCO

Thermal-Link

A non-resettable device incorporating a THERMAL ELEMENT which will open a circuit once only when exposed for a sufficient length of time to a temperature in excess of that for which it has been designed.

 ATCO                                                                                

Alloy Thermal-Link

Alloy Type Thermal-Link, Alloy is the thermal element.

FH 

Feed Heater

Electric appliances that use electric energy to achieve heating effect.

MC

Main Circuit

All conductive components used in switching devices for closing or disconnecting circuits in a circuit.

CC

Control Circuit

In addition to the main circuit, all conductive parts of the switching apparatus used in the access circuit as the closing operation and / or opening operation of the switching apparatus.

I_r

Rated Current

The current used to classify an iTCO, which is the Maximum current that iTCO allows to carry and is able to cut off the circuit safely.

U_r 

Rated Voltage

The voltage used to classify an iTCO, which is the Maximum voltage that iTCO allows to carry and is able to cut off the circuit safely.

T_f

Rated Functioning Temp.

The temperature of the Thermal-Link which causes it to change the state of conductivity with a detection current up to

10 mA as the only load.

Tolerance: Tf 0 / -10 °C (GB 9816, EN 60691, K60691).

Tolerance: Tf ± 7 °C (J60691).

Fusing Temp.

Fusing Temp.

The temp. of the iTCO which causes it to change its state of conductivity is measured with silicone oil bath in which the temp. is increased at the rate of ( 0.5 to 1) °C /minutes, with a detection current less than 10 mA as the only load.

T_h

Holding Temp.

The Maximum temp. at which a iTCO will not change its state of conductivity when conducting rated current for 168 h.

T_m

Maximum Temp. Limit

The temp. of the iTCO stated by the manufacturer, up to which the mechanical and electrical properties of the iTCO having changed its state of conductivity, will not be impaired for a given time.

Stud, Soldering

Axial

●  Battery Control Unit Fail Protection

●  High Power Solid State Relays 

●  PTC Heaters

View Product Structure, Principle, Application Video

SETsafe | SETfuse Quality Policy

Provide Industry-Leading Products

Raw-materials Supplier

Select critical raw materials: Must be from a manufacturer with quality management system (ISO9001, IATF16949) certification.

Annual or Quarterly Audits.

IQC (Incoming Quality Check)

AQL(MIL-STD-105E), Dimensions, Function, Visual Inspection, RoHS & REACH Test.

Document

Formulate corresponding incoming inspection specifications (01-QA-06 Incoming Inspection Management Procedure) for each key materials according to design data such as material technical specification.

Testing Equipment and Tools

Projector, Tool Microscope, Salt Spray Tester, Universal Material Testing Machine, Spectrum Analyzer, etc.

Manufacturing Process

Online Inspection and Testing.

Document

Process Flow Chart.

Failure Mode and Effects Analysis (FMEA).

Quality Control Flow Chart (QCFC).

Inspection Specification for Process, Inspection Specification for Finished Good (SIP).

Work Instruction (WI).

Online Testing and Inspection

Resistance test system (100%).

100% Visual inspection.

etc.

IPQC (In Process Quality Control) Inspection

AQL(MIL-STD-105E), Dimensions Inspection, Function Test, Visual Inspection.

FQC ( Final Quality Control)

AQL(MIL-STD-105E), Dimensions Inspection, Function Test, Visual Inspection, RoHS & REACH Test.

Reliability Test

Test Specification (01-TE-01-xxx).

Including 26 items of Appearance Requirements, Temperature Characteristics, Electrical Performance, Mechanical Performance, Soldering Performance, Environmental Test and Life Test. e.g.

Rated Functioning Temperature Test.

Holding Temperature Test.

Internal Resistance Test.

Insulation Resistance Test.

Interrupting Current Test.

etc.

OQC (Outgoing Quality Control)

AQL(MIL-STD-105E), Packaging, Labeling, Quantity Inspection.

Agency

Agency (IATF16949 TUV) Annual Audits.

Management System

ISO9001 (TUV approved and issued certificate).

ISO14001, ISO45001, etc.

Click to view the certificate

Environmental

RoHS & REACH Compliant.

SETsafe | SETfuse

Usage

1. When atmosphere pressure is from 80 kPa to 106 kPa, the related altitude shall be from 2000 meter to - 500 meter.

2. Operating voltage less than rated voltage of iTCO, operating current less than rated current of iTCO.

3. Do not touch the iTCO body or leads directly when power is on, to avoid burn or electric shock.

Electrical Connections

Mechanical Connection MC

1. The product surface must not be damaged.

2. If adding terminals to electrode leads, make sure the electrode without grease or other foreign matters, and use the same  cross-section connection terminal, otherwise the electrode may heat abnormally.

3.  If locking with screw, to prevent loosening, please add gasket and use proper screw when installing the product. Ensure that the screw tightening torque meets the requirements.

Soldering CC

1. Soldering should be carried out under the soldering conditions listed in table-1.

2. Feed heater and remote signal CC contain thermal element , improper soldering operation (too high soldering temperature  , too long soldering time, too short lead wire etc.) may cause CC to open in advance.

3. When soldering conditions are more severe than those listed in table-1 , a heat sink fixture should be used between solder point and iTCO body.

TABLE-1 Hand - Soldering Time (s)

Test Methods

 Cold Resistance Test

1. If product TCR is not less than 350 E (-6) / °C and the test ambient temperature  is during 15 °C to 35 °C, the measured resistance value shall be corrected as the relative resistance value under 25 °C according to TCR formula.

2. Resistance Measurement (4-wire).

Replacement

iTCO is the non-resettable product, for safety sake, please use the same type of iTCO for replacement.

Storage

Please store the iTCO without high temperature , high humidity or corrosive gas. To avoid influencing the solder-ability of  the leads and influencing contact resistance, please use them up within 1 year after receiving the goods.

SETsafe | SETfuse

SET

idea Thermal-Link (iTCO) Catalog

View PDF