KSD302 250V 20A Manual Reset Thermostat Temperature Switch
KSD302 250V 20A Manual Reset Thermostat Temperature Switch
KSD302 250V 20A Bipolar Temperature Switch – Manual Reset Thermostat
Keep your water heater and heating appliances running safely with the KSD302 4-Pin Bipolar Temperature Switch. Rated at 250V / 20A, this durable metal thermostat is designed to cut power automatically when temperatures exceed a set threshold (75–95°C range), then allow a controlled manual or automatic reset — preventing overheating and protecting your equipment.
How It Works
- Manual Reset Mode: Operates in a normally-closed state. If the unit trips due to over-temperature or unstable voltage, power is restored only when you physically press the reset bar — giving you full control before restarting your appliance.
- Auto Reset Mode: Functions similarly to manual reset, but once tripped, the switch monitors tank temperature and automatically restores power when the temperature drops to approximately 30°C — no manual pressing or disassembly required.
Key Features
- Rated Voltage: 250V AC
- Rated Current: 20A
- Temperature Range: 75–95°C
- Pin Configuration: 4-Pin Bipolar
- Material: Durable Metal construction
- Color: Silver
- Probe Dimensions: 6 × 40 mm
- Overall Dimensions: 4.5 × 2.8 × 2.3 cm (1.77 × 1.1 × 0.9 in)
- Compatible with electric water heaters and similar heating appliances
Package Includes
- 1 × KSD302 Temperature Switch / Manual Reset Thermostat
Made in Mainland China.
Note: Product images are for illustration purposes only and may not reflect actual size or exact color. Please refer to the listed dimensions for accurate sizing. Minor measurement variations may occur due to manual measurement.
Safety & Standards
For guidance on electrical safety with heating appliances and components, refer to the U.S. Consumer Product Safety Commission (CPSC), which provides standards and safety information for electrical devices used in the home.
Frequently Asked Questions
Q: What is the difference between the manual reset and auto reset versions of the KSD302 thermostat?
A: The manual reset version requires you to press the reset bar to restore power after the switch trips due to over-temperature. The auto reset version automatically restores power once the temperature drops back to approximately 30°C, without any manual intervention needed.
Q: What appliances is the KSD302 250V 20A temperature switch compatible with?
A: This thermostat is primarily designed for electric water heaters but is also compatible with a range of household and industrial heating appliances that operate within the 75–95°C temperature range at up to 250V / 20A.
Q: What does "4-pin bipolar" mean for this temperature switch?
A: A 4-pin bipolar configuration means the switch controls two separate circuits simultaneously (both poles), providing an added layer of safety by fully disconnecting the heating element from the power supply when the set temperature threshold is reached.
Q: Is installation of this thermostat difficult?
A: The KSD302 is a direct-replacement component for compatible water heaters and heaters. Always ensure power is fully disconnected before installation, and consult your appliance's service manual or a qualified technician if you are unsure about the installation process.