Thermal Fuse KSD301 150°C

Description

Product Description The KSD301 Snap Disc Bimetal Thermostat Switch (150°C variant) is a compact, fixed-temperature thermal safety cutout designed to provide reliable over-temperature and fire protection in mid-to-high heat household appliances and commercial hardware. Operating via a pre-calibrated internal bimetallic disc, it utilizes a sharp “snap action” that instantly breaks or completes the electrical circuit the exact moment the mounting surface reaches 150 ∘ C (302 ∘ F). This 150°C component is overwhelmingly deployed as a Normally Closed (NC) configuration. Under standard operation, the internal contacts remain closed, letting current flow freely. If the appliance malfunctions or dry-burns, causing the temperature to spike to 150 ∘ C, the disc snaps shape to open the contacts and cut power. Once the system cools back down safely (typically dropping by 15 ∘ C−30 ∘ C), the switch automatically resets itself to restore connectivity. Key Specifications Model Designation: KSD301 / KSD301-R / KSD301A / KSD1 Action Temperature: 150 ∘ C (302 ∘ F) fixed factory calibration. Circuit Logic: Normally Closed (NC) — Opens on temperature rise, auto-resets on cool down. Voltage Rating: Up to 250V AC universal mains operation (commonly rated at 10A or heavy-duty 16A). Housing Material: High-isolation Bakelite (black polymer body) or high-temperature Ceramic styles. Terminal Design: Dual flat 6.3mm (1/4 inch) quick-connect male spade lugs (available in straight or bent variations). Mounting Base: Loose/movable or fixed aluminum retaining flange bracket with twin screw holes for surface alignment. Compatibility Guide The KSD301 structure is a globally standardized engineering profile. It is cross-compatible across a massive range of consumer electronics based on physical footprint, current limits (10A/16A), and temperature calibration (150 ∘ C). 1. Alternative Branding & Sourcing Equivalents This component serves as a direct drop-in replacement for 150°C snap disc switches manufactured or distributed by major marketplace lines, including: Awozkcd Series: Directly replaces the Awozkcd 150°C Thermostat Switches used extensively for kitchen appliance maintenance. RuiLing / Sourcing map / uxcell: Matches the standardized 150°C bimetal configurations distributed across global online hardware catalogs. 2. Common Applications & Products A 150 ∘ C threshold makes this component an essential safety fallback inside high-heat consumer goods: Microwave Ovens: Positioned flat against magnetron housings or upper heating elements as a secondary high-limit safety cut-out fuse across major brands like Sharp, GE, LG, and Samsung. Water Dispensers & Water Heaters: Acts as the high-limit safety boundary on internal hot water storage tanks to kill power before catastrophic steam pressure builds up. Countertop Cooking Appliances: Found routinely protecting deep fryers, countertop baking ovens, electric grills, bread makers, and smokers. ⚠️ Installation Tip: For maximum accuracy, ensure the aluminum cap of the thermostat is mounted perfectly flat against the heat-source surface. Applying a thin film of thermal paste (heatsink compound) under the cap significantly improves thermal transfer, minimizing response delays.