10-Pack KSD9700 Thermal Temperature Switch Normally Closed
10-Pack KSD9700 Thermal Temperature Switch Normally Closed
10-Pack KSD9700 Thermal Temperature Switch – Normally Closed Protector
Keep your motors, appliances, and electrical equipment running safely with this 10-pack of KSD9700 Series Thermal Temperature Switches. Engineered with a fast-action bimetallic strip design, these compact normally-closed switches automatically open when a set temperature is reached and reset once the temperature drops — giving your equipment reliable, hands-free thermal management.
Made in Mainland China.
Key Features
- Automatic Reset: Bimetallic strip jump-type design resets automatically when temperature returns to safe levels — no manual intervention needed.
- Wide Operating Range: Configurable across 40–150°C in 5°C increments to suit a broad range of applications.
- Compact & Robust: Stainless steel shell with plastic casing — small footprint, built to last up to 10,000 switching cycles at rated resistive load.
- Normally Closed Operation: Contacts open when temperature rises above the set point; contacts close again as temperature drops — ideal for overtemperature protection circuits.
- Versatile Compatibility: Suitable for motors under 1HP, fluorescent lamp ballasts, lighting fixtures, automobile engines, seafood processing machines, electric blankets, and general daily electrical appliances.
Specifications
| Model | KSD9700 Series |
| Type | Thermal Bimetallic Strip, Auto-Reset, Normally Closed |
| Shell Material | Stainless Steel (Metal) + Plastic Casing |
| Color | Black |
| Operating Temperature Range | 40–150°C (5°C steps) |
| Temperature Tolerance | ±5°C |
| On-Off Temperature Difference | 10–50°C |
| Electrical Rating | AC 250V, 50–60Hz, 5A |
| Contact Resistance | ≤100mΩ (lead length <80mm) |
| Insulation Resistance | >2MΩ (DC500V megohmmeter) |
| Dielectric Strength | AC 1500V / 50–60Hz, no breakdown for 1 minute |
| Switch Type | Single-Pole Single-Throw (SPST) |
| Action Type | 1B (Automatic Reset) |
| Durability | 10,000 cycles at rated resistive load |
| Max Installation Temperature | Not to exceed 120% of operating temperature |
| Motor Compatibility | Less than 1HP |
| Package Contents | 10× Temperature Switch |
Applications
- Small motors (under 1HP)
- Fluorescent lamp ballasts
- Lighting fixtures
- Automobile engines
- Seafood processing equipment
- Electric blankets & tropical blankets
- General household electrical appliances
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Note: Actual color may vary slightly from images due to monitor brightness settings. Please allow minor measurement tolerances in listed dimensions.
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Frequently Asked Questions
Q: What does "normally closed" mean for a KSD9700 thermal temperature switch?
A: A normally closed (NC) thermal temperature switch maintains an electrically connected (closed) circuit under normal operating conditions. When the temperature rises above the preset trip point, the bimetallic strip causes the contacts to open, interrupting the circuit. Once the temperature falls back to a safe level, the contacts automatically close again — providing automatic reset protection.
Q: What applications are these KSD9700 temperature switches suitable for?
A: These thermal switches are designed for a wide range of uses, including small motors under 1HP, fluorescent lamp ballasts, automotive engines, lighting fixtures, seafood processing machines, electric blankets, and various household electrical appliances. Their compact stainless steel build and AC 250V/5A rating make them highly versatile.
Q: What temperature range can these switches be set to?
A: The KSD9700 series covers an operating temperature range of 40°C to 150°C, with each 5°C interval representing one grade level. Temperature tolerance is ±5°C, and the on-off switching differential is between 10°C and 50°C depending on the specific grade selected.
Q: How long do these thermal switches last?
A: These switches are rated for up to 10,000 switching cycles at rated resistive load current, making them a durable long-term solution for thermal management in motors and electrical equipment.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.