Refrig PTC Relay 3Pin

Description

Universal 3-Pin Refrigerator Compressor PTC Starter Relay ### Product Overview This 3-Pin PTC (Positive Temperature Coefficient) Starter Relay is a solid-state electronic component designed to initiate the start cycle of fractional horsepower refrigerator and freezer compressors. It relies on an internal ceramic resistor disc to manage current flow. When the refrigerator cycles on, the disc delivers a high-current surge to power up the compressor’s auxiliary start winding. Within moments, the disc heats up, its electrical resistance spikes sharply, and it cleanly cuts power to the start winding—leaving the compressor running efficiently on its main winding. The extra terminal pins on this model allow for the optional integration of a running capacitor to boost electrical efficiency. ### Key Features Solid-State Reliability: No moving parts, mechanical springs, or contact points to wear down, melt, or bind over time. 3-Pin Configuration: Offers enhanced wiring versatility, allowing direct connection to the main power lines while dedicating a pin to a running capacitor loop. Universal 4.7Ω Resistance: Features a standard 4.7 Ohm internal ceramic disc, which is the most widely used resistance rating for small-to-medium residential cooling compressors. Direct Plug-On Design: Standard low-profile casing designed to snap directly onto the compressor’s lower run and start terminal pins under the plastic terminal housing. ### Product Compatibility & Sizing Specifications PTC relays are highly interchangeable universal components. To guarantee a perfect fit, match the number of pins (3 Pins), the overall shape, and the resistance value (typically 4.7Ω or 15Ω) of your original part. Direct Replaces & Equivalent Configurations: QP2 Series: QP2-4.7, QP2-4R7, QP2-4.7G12 (3-pin sub-variants) Universal Combinations: Often sold as a matching kit alongside a 1/2 HP, 1/3 HP, or 1/4 HP generic thermal overload protector. Pin Upgrade: Can replace a 1-pin or 2-pin QP2-4.7 relay if the extra terminal prongs are simply left unused, provided the internal resistance matches. Compatible Appliance Types: Mini-fridges, compact under-counter refrigerators, and office bar coolers. Wine chillers, beverage centers, and beer kegerators. Small household single-door refrigerators and chest freezers. Countertop automatic ice makers and water dispensers. Common Compatible Appliance Brands: Because this part functions as a standardized replacement module, it is compatible across an array of major global compressor and appliance brands, including: Vissani / EdgeStar / Danby / Haier (Extremely common in compact mini-fridges) Whirlpool / Kenmore / Maytag / Frigidaire LG / Samsung / Panasonic Koldfront / Igloo / RCA / Galanz ⚠️ Installation Note: If your refrigerator turns on, clicks every few minutes, but the compressor fails to run or get cold, the internal ceramic disc inside this relay has likely cracked or shattered. When replacing, ensure your wiring matches the original schematic (especially if a run capacitor is attached). Always unplug the appliance from the wall before attempting the swap.