Ref 4TM Overload 1/12HP

Description

4TM Refrigerator Compressor Thermal Overload Protector (1/12 HP) ### Product Overview The 4TM Thermal Overload Protector (1/12 HP) is a highly precise safety device engineered to protect ultra-low fractional horsepower refrigeration compressors from overheating and electrical damage. Utilizing a specialized, temperature-sensitive bimetallic disc and an internal heater wire, the 4TM continuously monitors both the compressor’s casing temperature and its current draw. If the compressor experiences a start failure, voltage drop, or locked rotor condition, the bimetallic disc rapidly snaps open to cut off power before the compressor windings burn out. Once the temperature drops back down to a safe operating level, the switch automatically resets. ### Key Features Engineered for 1/12 HP: Specifically calibrated to match the thermal and current curves of very small 1/12 HP (~62W to 75W) compressors. Snap-Action Thermal Disc: Provides rapid, positive disconnection when safety limits are breached, ensuring consistent trip times and a long service life. Direct Compressor Mounting: Low-profile, plug-on housing designed to slide directly onto the compressor’s common terminal pin under the terminal cover. Durable Construction: Housed in a flame-retardant, high-insulation material featuring a standard 1/4″ male spade quick-connect terminal on the exterior. ### Product Compatibility & Sizing Specifications Because 4TM protectors are highly universal functional components, compatibility is determined by matching the horsepower rating (1/12 HP), operating voltage (typically 110V/120V or 220V/240V), and the specific 4TM numeric code printed on your old unit. Direct Replaces & Equivalent Configurations: Sensata / Texas Instruments Klixon: Original 4TM Series (matches various codes such as 4TM110NBBYY or similar micro-compressor configurations). Universal Replacements: Directly replaces generic round, square, or rectangular overload switches rated specifically for 1/12 HP or ~65 Watts. Typical Pairings: Commonly used in combination with 1-pin or 2-pin PTC starter relays on miniature cooling loops. Compatible Appliance Types: Mini-fridges, office compact coolers, and micro-refrigerators. Countertop ice makers and small water dispensers. Specialized medical refrigeration units and small cosmetic skin-care fridges. Under-counter wine chillers and beverage displays utilizing micro-compressors. Common Compatible Compressor & Appliance Brands: This universal protector fits mini-compressors integrated into appliances across a variety of domestic and international brands, including: Embraco / Secop / Danfoss (Commonly found on smaller micro-series compressors like the EM/NSY series) Whirlpool / Kenmore / Maytag (Compact/Mini lines) Frigidaire / Danby / Haier Midea / Galanz / RCA ⚠️ Installation Note: Ensure the overload protector is pressed entirely and firmly onto the compressor pin. A loose connection creates localized electrical resistance, causing the protector to get artificially hot and trip continuously even if the compressor itself is operating perfectly. Always unplug the appliance before beginning repairs.