Refrig PTC Relay 4Pin

Description

Universal 4-Pin Refrigerator Compressor PTC Starter Relay ### Product Overview The 4-Pin PTC (Positive Temperature Coefficient) Starter Relay is a highly versatile, solid-state electronic component designed to initiate the start cycle of fractional horsepower refrigeration compressors. It houses a specialized ceramic resistor disc that delivers a high-current pulse to activate the compressor’s auxiliary start winding upon startup. As the disc rapidly heats up, its electrical resistance spikes sharply, safely shutting off the start winding so the compressor can run efficiently on its main winding. Featuring four terminal prongs, this relay offers maximum wiring flexibility, making it the industry choice for circuits that require both a running capacitor and a starting capacitor setup. ### Key Features Maximum 4-Pin Versatility: Four separate male spade quick-connect terminals allow you to connect the main power lines while cleanly routing separate loops for running and starting capacitors. Solid-State Reliability: Built with no moving internal parts, mechanical springs, or contact points, eliminating common mechanical failures and ensuring silent switching. Standard Resistance Options: Commonly configured with a universal internal ceramic disc (typically 4.7Ω or 15Ω like the MZ94-15) to match the starting torque requirements of various compressor sizes. Direct Plug-On Assembly: Standard low-profile casing designed to press tightly directly onto the compressor’s lower run and start terminal pins under the plastic terminal cover. ### Product Compatibility & Sizing Specifications PTC relays are highly interchangeable universal components. To ensure a perfect fit, match the number of pins (4 Pins), the physical layout, and the resistance value (Ohms) printed on your original part. Direct Replaces & Equivalent Configurations: ZHB Series: ZHB54-120P4.7, ZHB60-120P4.7, ZHB88-125P4.7, ZHB60-120P15 QP2 Series: QP2-4.7 / QP2-4R7 (4-pin sub-variants) MZ94 Series: MZ94-15Ω (Very common multi-pin configuration) Universal Drop-In: Can safely be used to replace 1-pin, 2-pin, or 3-pin relays of the same resistance rating by simply leaving the extra terminal prongs unused. Compatible Appliance Types: Standard household double-door refrigerators, side-by-side models, and chest freezers. Compact mini-fridges, office bar coolers, and wine chillers. Countertop automatic ice makers and water dispensers/coolers. Commercial display cases and dehumidifiers utilizing fractional compressors. Common Compatible Appliance Brands: Because this part functions as a standardized universal replacement module, it is compatible across a wide array of major global compressor and appliance brands, including: Haier / Siemens / Panasonic (Extremely common default component) Whirlpool / Kenmore / Maytag / KitchenAid Frigidaire / Electrolux / GE (General Electric) LG / Samsung / Danby / Magic Chef / Vissani ⚠️ 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 a 4-pin relay, document your capacitor wiring carefully to ensure the lines go back onto the correct terminal terminals. Always completely unplug the appliance from the wall before attempting the swap.