Thermal Fuse KSD301 70°C

Description

Product Description The KSD301 Snap Disc Bimetal Thermostat Switch (70°C variant) is a compact, thermal control switch designed for precise temperature regulation and overheat protection in low-to-medium heat applications. Featuring a pre-calibrated internal bimetallic disc, it utilizes a “snap action” mechanism that instantly opens or closes the electrical circuit the moment the ambient or surface temperature reaches exactly 70 ∘ C (158 ∘ F). Depending on your specific system blueprint, this 70°C component is available in two primary circuit logic configurations: Normally Closed (NC): The standard safety cutout configuration. Current flows freely under normal conditions. Once the target surface hits 70 ∘ C, the contacts snap open to cut power and prevent overheating. It automatically resets once the temperature drops back down (typically by 15 ∘ C−30 ∘ C). Normally Open (NO): The standard cooling/signal configuration. The circuit remains broken under normal temperatures. When the device heats up to 70 ∘ C, the contacts snap shut to activate a cooling fan, exhaust system, or warning indicator. Key Specifications Model Designation: KSD301 / KSD301-R / KSD301A / KSD301-G Series Action Temperature: 70 ∘ C (158 ∘ F) fixed factory calibration. Voltage Rating: Up to 250V AC universal operation (commonly rated at 10A or 16A). Housing Material: High-isolation Bakelite (black polymer) or high-durability Ceramic body. Terminal Design: Dual flat 6.3mm (1/4 inch) quick-connect male spade lugs. Mounting Base: Loose or fixed aluminum retaining flange bracket with twin screw slots for surface mounting. Compatibility Guide The KSD301 series is manufactured to global dimensional and electronic standards. It is cross-compatible across a broad range of consumer goods based entirely on matching the current threshold (10A/16A), mounting structure, and temperature (70 ∘ C). 1. Alternative Branding & Sourcing This standard component directly replaces or interfaces with 70°C snap disc switches offered across various global manufacturing lines: Awozkcd / uxcell Series: Frequently matches the 70°C auto-reset or manual-limit switch replacement packs found on Amazon and industrial supply networks. Appliance OEM Cross-References: Replaces standard low-heat limit switches branded under DollaTek, JJHXSM, and Telmal. 2. Common Applications & Products A 70 ∘ C threshold is ideal for mild heat management, making this thermostat a staple in: Microwave Ovens: Often serving as a magnetron overheat sensor or air draft safety switch (such as the WB27X11213 replacement standard for GE and Whirlpool lines). Water Dispensers & Purifiers: Regulates or caps intermediate temperature reservoirs in hot/cold water dispensers and small heating pads to keep them safe to touch. Gas Boilers & Heaters: Integrated as an airflow draft sensor to shut down the appliance if exhaust ventilation blocks up and forces temperatures past 70 ∘ C. Battery Banks & Electronics Cooling: Used in the Normally Open (NO) variant to switch on cabinet intake fans when battery arrays or power amplifiers generate moderate operating heat. ⚠️ Installation Tip: When mounting, make sure the aluminum face of the switch sits completely flush against the target surface. Applying a thin layer of thermal conductive compound (heatsink paste) will ensure fast, accurate thermal transfers and prevent delayed trip times.