10PCS Normally Open KSD301 10A 250V KSD301 40° Temperature Switch Thermostat Sensor Reliable, simple temperature switching for protection and control Designed to switch electrical circuits at a specified temperature (40°C). The normally open (NO) contact closes when the set temperature is reached, allowing current flow to the load. Rated for common mains and lowvoltage applications: 10 A at 250 V AC. Use within these limits to ensure safe, reliable operation. Supplied as a pack of 10 pieces for repairs, prototypes, small production runs, or spares. Key features and attributes Model: KSD301 / KSD301 Contact type: Normally Open (NO) Switching temperature: 40 degrees Celsius (40°C) Current/voltage rating: 10 A / 250 V AC Quantity: 10 pieces per pack Function: Temperatureactuated switch for on/off control of circuits at the specified temperature Why you need it Protect equipment from overheating by automatically switching fans, alarms, or cutoff circuits when temperature reaches 40°C. worn or failed thermostat switches in appliances or equipment with a direct, costeffective component that meets the same basic specification. Add temperaturebased control to DIY projects and prototypes without complex electronics. Performance and compatibility notes Use on circuits where the maximum switching load does not exceed 10 A at 250 V AC. Suitable for inserting in series with heaters, fans, pumps, or control inputs to trigger at the 40°C setpoint. Intended as a simple mechanical temperature switch; integrate with appropriate wiring and circuit protection (fuses, breakers) according to your application and local electrical codes. Typical use cases Cooling control: Automatically activate a cooling fan or ventilation system when an enclosure, motor, or transformer reaches 40°C. Overheat protection: Serve as a safety cutoff or alarm trigger in small household appliances, chargers, or power supplies to prevent damage from overheating. Environmental or process control: Provide temperaturetriggered switching for incubators, temperature monitoring enclosures, or other equipment that requires action at around 40°C. Installation and handling tips Confirm wiring and load meet the 10 A / 250 V rating before connecting. Mount and wire the switch so it senses the temperature representative of the area or component you want to protect or control. Observe basic safety and local regulations when working with mains voltage. Isolate power before installation or replacement. Test operation after installation to verify the switch activates at the required temperature in your specific setup. What's included 10 x KSD301 (KSD301) Normally Open temperature switch, 40°C, 10A/250V. This pack provides an economical, specificationmatched supply of temperature switches for repairs, maintenance, and small projects that require a reliable 40°C activation point and a 10 A / 250 V AC switching capacity.