10PCS KSD303 10A 55°C Manual Reset Thermostat — Normally Closed Temperature Switch Key benefits Protects equipment from overheating by interrupting power when temperature reaches 55°C. Simple, reliable mechanical operation with a clear normally closed (NC) behavior: circuit is closed at normal temperatures and opens at the set point. Manual reset design prevents automatic reenergizing after a trip, giving you control to inspect and safely restore operation. Economical pack of 10 units — convenient for maintenance, repairs, or batch installations. What this device does and why you need it The KSD303 55°C thermostat monitors temperature and opens the circuit when the switch reaches 55°C, helping prevent damage from excessive heat. This is useful wherever a dependable thermal cutoff with manual reset is required. Because it is normally closed, the device carries current during normal operation and only interrupts the circuit when the temperature limit is reached. The manual reset feature stops automatic restart after a fault, reducing the chance of repeated overheating and allowing inspection and corrective action before returning to service. Key attributes Model: KSD303 Quantity: 10 pieces per package Switch type: Normally closed (NC) Reset type: Manual reset Rated current: 10A Temperature set point: 55°C Functionality and compatibility Intended for use in electrical circuits where a mechanical temperatureactuated switch with a 55°C trip point and a 10A current rating is appropriate. Compatible with applications and devices that require a normally closed thermostat with manual reset, within the electrical and thermal limits specified by the component (model KSD303, 10A, 55°C). Typical applications (examples) Appliance protection: Use as an overtemperature protector in small household appliances, heating elements, or control boxes to stop operation if internal temperatures exceed safe limits. Electronics and power equipment: Provide thermal protection for transformers, power supplies, motors, and chargers where a 55°C shutdown point and manual reset are desirable. Maintenance and repairs: worn or failed temperature switches in production equipment, lab instruments, or hobby electronics where standardized, easytoinstall thermal protection is needed. Installation and use tips Verify the device is appropriate for your application by confirming the 10A current rating and 55°C trip point meet your requirements. After a trip, the manual reset must be operated to restore the circuit — inspect the equipment for root causes of overheating before resetting. For safe and reliable operation, install and wire the switch according to established electrical practices and local regulations. What's included 10 × KSD303 normally closed manual reset thermostats, rated 10A, set to trip at 55°C. Simple, reliable thermal protection in a 10piece pack — the KSD303 10A 55°C manual reset thermostat gives you a straightforward way to prevent overheating and control restarts after temperature faults.