{"product_id":"schneider-electric-b4-85-overload-thermal-unit-heating-element","title":"Schneider Electric B4.85 Overload Thermal Unit Heating Element","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eB4.85\u003c\/strong\u003e is a thermal overload relay heating element manufactured by Schneider Electric, designed for use with traditional NEMA-style motor starters. This component acts as the sensing element for thermal overload relays, providing essential motor protection by monitoring the current flow. When the motor draws excessive current for a prolonged duration, the heating element generates heat proportional to the current, triggering the thermal relay mechanism to open the control circuit and prevent motor damage due to overheating. It is a critical component for maintaining the operational integrity of electric motors in industrial control systems.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Sensing\u003c\/strong\u003e: Provides accurate current-to-heat conversion for reliable overload detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Engineered for integration into standard Schneider Electric\/Square D NEMA thermal overload relay housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperational Reliability\u003c\/strong\u003e: Ensures consistent motor protection performance in heavy-duty industrial applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e: Built to meet industrial standards for electrical components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProtection of three-phase AC motors in industrial starters.\u003c\/li\u003e\n\u003cli\u003eHVAC systems, pumps, and conveyor motor protection.\u003c\/li\u003e\n\u003cli\u003eMaintenance and repair of legacy electrical starter assemblies.\u003c\/li\u003e\n\u003cli\u003eOverload protection in motor control centers (MCCs).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSchneider Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSchneider Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOverload thermal unit heating element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Phase\u003c\/td\u003e\n\u003ctd\u003ePhase-Out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.04 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommodity Code\u003c\/td\u003e\n\u003ctd\u003e85371099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect Sizing\u003c\/strong\u003e: Ensure the B4.85 heating element is correctly selected based on the motor's full-load current (FLC) rating as specified by the motor manufacturer’s tables provided for the thermal overload relay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting\u003c\/strong\u003e: Insert the heating element into the thermal overload block, ensuring the mounting screws are tightened to the specified torque to prevent high-resistance contact points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspection\u003c\/strong\u003e: Periodically inspect the heating element for signs of discoloration or terminal looseness caused by thermal cycling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety\u003c\/strong\u003e: Always disconnect power to the motor starter before removing or installing thermal heating elements to prevent electrical shock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment\u003c\/strong\u003e: Operate within a clean, dry control panel to ensure the thermal characteristics of the unit are not compromised by ambient dust or humidity.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":53104562962795,"sku":"B4.85","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/b4-85-u3igid0gm51.png?v=1776162832","url":"https:\/\/www.plcprotech.com\/products\/schneider-electric-b4-85-overload-thermal-unit-heating-element","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}