Ref 4TM Overload 1/3HP

Description

4TM Refrigerator Compressor Thermal Overload Protector (1/3 HP) ### Product Overview The 4TM Thermal Overload Protector (1/3 HP) is a heavy-duty electromechanical safety switch designed to safeguard medium-to-large capacity fractional horsepower refrigeration compressors from electrical burnout, locked rotors, and severe overheating. This vital safety device utilizes an internal, calibrated bimetallic snap-action disc combined with a series heating element. If the compressor stalls, draws excessive current under a heavy thermal load, or experiences a sudden voltage drop, the bimetal disc quickly reacts to open the circuit and cut power. Once the compressor cools down to a safe operating temperature, the switch automatically resets, safely restoring normal refrigeration cycles. ### Key Features Engineered for 1/3 HP Systems: Specifically calibrated to handle the higher operational current and thermal profiles of standard 1/3 HP (~250W) compressors. Dual Thermal-Current Sensing: Provides maximum safety by monitoring both the physical temperature of the compressor shell and the electrical current passing through the motor windings. Direct Plug-On Installation: Standard low-profile “butterfly” style casing designed to press tightly directly onto the compressor’s common terminal pin under the plastic terminal cover. Heavy-Duty Electrical Contacts: Built with high-grade conductive alloy terminals and a robust, flame-retardant housing to withstand continuous thermal cycling in demanding environments. ### Product Compatibility & Sizing Specifications Because 4TM protectors are highly universal functional components, compatibility is determined by matching the horsepower rating (1/3 HP), operating voltage (typically 110V/120V or 220V/240V), and the pin layout rather than specific brand names alone. Direct Replaces & Equivalent Configurations: Sensata / Texas Instruments Klixon: Original 4TM Series (matches various codes such as 4TM314NFBYY, 4TM445KFBYY, or similar configurations depending on regional voltage). Universal Replacements: Directly replaces any generic round, square, or rectangular overload protector rated specifically for 1/3 HP or ~250 Watts. Common Pairings: Typically pairs alongside heavy-duty 1-pin, 2-pin, or 4-pin PTC solid-state starter relays, or heavy mechanical current relays on larger residential and commercial refrigeration loops. Compatible Appliance Types: Large domestic household refrigerators, side-by-side family fridges, and French-door models. Commercial beverage display coolers and under-counter restaurant chillers. Large chest freezers and upright deep freezers. Heavy-duty water fountains, commercial ice makers, and office water dispensers. Common Compatible Compressor & Appliance Brands: This universal protector is a direct fit for compressors integrated into appliances from many major domestic and international brands, including: Embraco / Secop / Danfoss (Commonly found on heavy-duty EM, NE, and TLS series compressors) Whirlpool / Kenmore / Maytag / KitchenAid Frigidaire / Electrolux / GE (General Electric) Panasonic / Haier / Midea / LG / Samsung ⚠️ Installation Note: Ensure the overload protector is pushed entirely and firmly onto the compressor pin. A loose connection will create localized electrical resistance, causing the protector to get artificially hot and trip continuously even if the compressor itself is completely healthy. Always ensure your refrigerator is completely unplugged before beginning the replacement.