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SK Series Ir : 10 A

Product catalog summary

Overview

The SK Series Thermal-Link (ATCO) Alloy Type is a one-time, non-resettable thermal protection device designed to open electrical circuits when exposed to temperatures above its rated threshold. Manufactured by Xiamen SET Electronics Co., Ltd., it is primarily used in electric heating and household electrical appliances. The device comprises a fusible alloy thermal element, flux resin, a protective case, sealant, and insulated lead wires.

Features and Applications

Non-resettable operation with precise temperature response.
Customizable insulated lead wires, including length and pluggable options.
Mounting hole for easy installation.
Compliance with RoHS and REACH environmental standards.
Typical applications include electric heating devices and home electrical appliances.

Specifications

The SK Series covers rated functioning temperatures ranging from 102°C to 221°C, with a rated current of 10A and voltage up to AC 250V. Safety certifications include UL, cUL, TUV, PSE, and CCC. Models are identified by their fusing temperature, as summarized below:

Model	Fusing Temp. (°C)	Holding Temp. (°C)	Max Temp. Limit (°C)	Rated Current (A)	Rated Voltage (V)	Certifications
SK221	218 ± 2	186	182	10	250 AC	UL, cUL, TUV, CCC, PSE (partial)
SK205	199 ± 3	167	163	10	250 AC	UL, cUL, TUV, CCC, PSE (partial)
SK160	155 ± 2	130	126	10	250 AC	TUV, CCC, PSE
SK102	98 ± 2	72	64	10	250 AC	TUV, CCC, PSE

Mechanical and Electrical Characteristics

The device operates by melting a fusible alloy element that retracts to break the circuit at the rated temperature. Lead wires are typically 18 AWG tinned copper. The product includes dimension specifications and marking codes for traceability, including manufacturing date codes.

Soldering and Assembly Guidelines

Hand soldering temperature must not exceed 400°C; soldering time varies with lead wire length and type.
Use heat sinks during soldering to prevent premature activation.
Wave soldering requires controlled preheating and cooling times to avoid damage.

Installation and Usage Recommendations

Install in areas with uniform temperature rise and minimal vibration.
Ensure lead wires are sufficiently long to prevent mechanical stress; follow minimum bending radius guidelines.
Avoid touching the device or leads when powered to prevent injury.
Replace only with equivalent devices from the same manufacturer; the device is non-repairable.
Store in low humidity, non-corrosive environments and use within one year of manufacture.

Mechanical Connection Methods

Riveting and crimping should use low-resistance materials to minimize contact resistance and avoid premature device activation.
Lead wire forming must avoid sharp bends or damage; use appropriate tools to secure the device body during bending.

Performance Curves

Temperature-time and current-time characteristic curves demonstrate device response under various thermal and electrical stresses, aiding design validation and safety assurance.

Packaging

Devices are packaged in bulk within PE bags and cartons, typically 3000 pieces per bag and 50 bags per carton, with a gross weight of approximately 18 kg per carton.

Part Numbering System

The part number encodes product category, series, rated functioning temperature, lead wire type, insulation material and color, lead forming, and packing method, allowing precise customization and traceability.

Glossary and Definitions

Key terms are defined according to standards GB 9816.1, EN 60691, and UL 1449, including Rated Functioning Temperature (Tf), Fusing Temperature, Holding Temperature (Th), Rated Current (Ir), and Rated Voltage (Ur).

Critical Limitations and Safety Notes

Operating voltage and current must not exceed rated values.
Atmospheric pressure and altitude limits apply: 80 kPa to 106 kPa and -500m to 2000m altitude.
Device must not be damaged, burned, or overheated during installation or use.

Company and Contact Information

Manufacturer: Xiamen SET Electronics Co., Ltd.
Contact Number: +86-592-571-5838
Websites: www.SETfuse.com, www.SETsafe.com
Email: [email protected]

Document Version and Rights

Version: 1.1
Copyright Period: 2024-2026
All rights reserved by Xiamen SET Electronics Co., Ltd.

This document provides comprehensive technical data, installation instructions, and safety guidelines for the SK Series Thermal-Link (ATCO) Alloy Type, ensuring reliable thermal protection in electrical applications.

Catalog excerpts

Description Thermal-Link (ATCO)-Alloy Type is defined as a non-resettable protective device functioning one time only. It is widely used in electrical equipment. ATCO is mainly consist of fusible alloy, flux resin, case, sealant and lead wires. Normally, fusible alloy is jointed to the two lead wires. Under abnormal conditions, when the temp. reaches to the fusing temp. of ATCO, the fusible alloy melts and quickly retracts to the two lead wire ends with the aid of the flux resin and disconnects the circuit completely. SETsafe | SETfuse Thermal-Link (ATCO)-Alloy Type SK series Rated Functioning Temp. from 102 °C to 221 °C, Rated Current: 10A, safety certification Includes UL, cUL, TUV, PSE, CCC, and complies with RoHS and REACH. • Other Temp. • The Length of Lead Wires • Lead Wires can Make Pluggable Terminals Features • Make a Mounting Hole • Lead Wires Insulated • High Accuracy of Functioning Temp. • RoHS & REACH Compliant Applications • Electric Heating Appliances • Home Electrical Appliances Structure Diagrams Marking Radial (Color for reference only) Fusible Alloy Flux Resin Sealant Epoxy Lead Wire Trademark Rated Functioning Temp. Rated Current Date Code Remark: The Date Code means Year and quarter: A stands for 2000, B stands for 2001 and 01 stands for the first quarter, 02 stands for the second quarter, and so on. +86-592-571-5838 www.SETfuse.comwww.SETsafe.com E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1

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Thermal-Link (ATCO)-Aiioy Type Specifications 1: "•"Means certificated, "0"Means non-certificated. 2: RoHS & REACH Compliant . 3: “ a “: The temperature measurement point for holding temperature (Th) shall be positioned 50 mm away from the product body, in accordance with the requirements specified in Appendix I of GB/T 9816.1-2023. E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1

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Agency Information Agency Symbol 1. Soldering should be carried out according to Table T-1. 2. The thermal element of ATCO is fusible alloy with low melting point, which is jointed with ATCO lead wires. Improper soldering operation (too high soldering temp. , too long soldering time, too short lead wire etc.) may transfer more heat to the thermal element and ATCO may open in advance. 3. When soldering conditions are more severe than those listed in Table T-1, a heat sink fixture should be used between soldering point and ATCO body. 4. When soldering, please do not pull / push or twist ATCO body...

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Wave Soldering The wave soldering parameters as Table T-2, for reference only, when ATCO is for practice use, you need to do some validation experiments. For example, using X-RAY to see the fusible alloy of ATCO whether damage after wave soldering. TABLE T-2 Wave Soldering Parameters Setting Max. Wave Soldering Temp. Preheating Temp. Cooling Time Preheating Time Dwelling Time All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1 +86-592-571-5838 www.SETfuse.comwww.SETsafe.com E-mail : [email protected]

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Thermal-Link (ATCO)-Alloy Type Product Temp.-Time Curve (Reference) The Temp.-Time Curve of Thermal-Link in different temp. oil bath. E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1 5

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Thermal-Link (ATCO)-Alloy Type Product Current-Time Curve (Reference) The Current-Time Curve shows functioning time at multi-times rated current at room temperature 25 ± 2 °C. E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1 6

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Part Numbering System ATCO - SK115 M T W A B - 001 Other Options Packing B Bulk T Taping Leads Forming A Straight Lead B Single Lead Bending E Leads Bending and Kinking M Multi stranded tinned copper wire Rated Functioning Temp. Product Category ATCO Alloy Thermal-Link E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1

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Thermal-Link (ATCO)-Alloy Type ATTENTION Usage 1. When atmosphere pressure is from 80 kPa to 106 kPa, the related altitude shall be from 2000 meters to - 500 meters. 2. Operating voltage less than rated voltage of ATCO, operating current less than rated current of ATCO. 3. Do not touch the ATCO body or lead wires directly when power is on, to avoid burn or electric shock. Replace ATCO is a non-repairable product. For safety sake, it shall be replaced by an equivalent ATCO from the same manufacturer, and mounted in the same way. Storage Do not store the ATCO at the high temp., high humidity or...

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Mechanical ConnectionRiveting 1. Choose small resistivity riveting material and be riveted. 2. A flexible lead or lead with low resistance should be used to rivet the ATCO. 3. Contact resistance should be minimal, large contact resistance will lead to higher temp., ATCO Functioning in advance. 1. Choose small resistivity crimping material and be crimped. 2. A flexible lead or lead with low resistance should be used to rivet the ATCO. 3. Contact resistance should be minimal, large contact resistance will lead to higher Temp., ATCO Functioning in advance. 1. If lead wire has to be bent, please...

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Thermal-Link (ATCO)-Alloy Type Feature & Model List Overview +86-592-571-5838 www.SETfuse.comwww.SETsafe.com E-mail : [email protected] All Rights Reserved by Xiamen SET Electronics Co., Ltd. 2024-2026 V1.1

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