10PCS KSD303 10A 105°C Manual Reset Thermostat Normally Closed Temperature Switch Why this switch matters Provides reliable overtemperature protection for equipment and appliances that require a manual reset safety cutoff. Prevents automatic restart after an overtemperature event by staying open until a deliberate reset, improving safety and reducing risk of repeated damage. Pack of 10 makes it easy to multiple units, keep spares for maintenance, or outfit several devices at once. Key features and benefits Model: KSD303. Quantity: 10PCS. Contact rating: 10A (suitable for circuits up to the 10 ampere switching capacity). Trip temperature: 105°C (degrees Celsius) — designed to open when the sensing temperature reaches 105°C. Type: Normally Closed (NC) mechanical thermostat switch with manual reset — closed under normal temperatures and opens at the set point to interrupt the circuit. Manual reset: After tripping at 105°C the switch remains open until manually reset, avoiding unintended automatic reactivation. Simple, passive operation: No external power required for sensing and switching. Compact, durable construction for straightforward replacement or integration. What it does and how it solves problems Detects overheating and reliably interrupts the electrical circuit at 105°C to protect components. Manual reset behavior ensures a human checks the system after an overtemperature event, reducing the chance of repeated failures or hazardous operation. The 10A rating covers many smalltomedium electrical loads, making these switches useful for routine thermal protection needs. Compatibility and performance notes Designed to be used where a KSD303 105°C normally closed manual reset thermostat is required. Intended for applications that do not exceed the switch's 10A switching capacity; always confirm total circuit current and voltage compatibility before installation. Mechanical operation offers straightforward, repeatable performance without electronic control. Typical applications / use cases Electric heaters and heating elements: act as a safety cutoff to prevent overheating of small heaters or localized heating assemblies. Motors, transformers, and power supplies: protect windings and electronics from sustained overtemperature conditions by opening the circuit at the 105°C threshold. Appliances and industrial equipment: useful for thermal safety in devices such as pumps, fans, battery chargers, and other equipment where manual inspection after an overheat event is desirable. Installation and safety tips Verify that the switch's 10A rating and 105°C trip temperature match your application requirements prior to installation. Install in a location where the sensor can accurately sense the component temperature you want to protect. After a trip, inspect the device or system to find and fix the cause of overheating before performing the manual reset. any switch that shows signs of damage, corrosion, or unreliable operation. What's included Ten (10) KSD303 manual reset thermostat switches, normally closed, rated for 10A and set to trip at 105°C. Reliable, simple thermal protection for maintenance, repairs, and smallscale production use where a manually reset, normally closed temperature switch is required.