{"title":"Contactors","description":"","products":[{"product_id":"trane-service-first-sfctr1p30a24vsa2l-contactor-1p-30a-24vac-screw-terminals-a2l-oem-replacement","title":"Trane Service First SFCTR1P30A24VSA2L Contactor 1P 30A 24VAC Screw Terminals A2L OEM Replacement","description":"\u003ch1\u003eTrane Service First SFCTR1P30A24VSA2L Contactor 1P 30A 24VAC Screw Terminals A2L OEM Replacement\u003c\/h1\u003e\n\u003cp\u003eThe SFCTR1P30A24VSA2L is a genuine Trane Service First heavy-duty definitive purpose contactor, acting as the critical switching \"brain\" for your outdoor condenser or heat pump unit. This OEM component is specifically engineered to manage high-amperage electrical loads, serving as the primary gateway that allows the thermostat’s 24V signal to engage the 230V compressor and fan motor circuits. Built to Trane’s rigorous A2L compatibility standards, this contactor features specialized silver cadmium oxide contacts designed to prevent \"pitting\" and sticking, ensuring a clean electrical break every time the system cycles off. Replacing your contactor with this authentic Service First part preserves the factory-certified safety and operational reliability of your Trane or American Standard system.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Part Number SFCTR1P30A24VSA2L:\u003c\/strong\u003e Guaranteed factory-direct fit for Trane and American Standard units, ensuring terminal alignment and mounting footprint accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty 30 Amp Rating:\u003c\/strong\u003e Engineered to handle the high-inrush starting current of residential compressors without overheating or premature coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixes Sticking Relay and Noise Issues:\u003c\/strong\u003e Replaces aging contactors prone to loud humming, buzzing, or \"welded\" contacts that cause the outdoor unit to run even when the thermostat is off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Safety Monitoring:\u003c\/strong\u003e Features a dust-shielded enclosure to prevent debris and insects from entering the contact points, a leading cause of electrical shorts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2L Refrigerant Compatibility:\u003c\/strong\u003e Specifically designed to meet the electrical arc suppression requirements for modern systems utilizing A2L mildly flammable refrigerants.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Trane \/ American Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Service First\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e SFCTR1P30A24VSA2L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1 Pole (with Shunt)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Load Amps:\u003c\/strong\u003e 30A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Voltage:\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e Screw Terminals with Quick Connects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocked Rotor Amps:\u003c\/strong\u003e 150\/180A (at 240V\/480V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eTake a Picture First —\u003c\/strong\u003e Before removing the old contactor, photograph the wiring exactly as it sits on the original terminals. Trane systems often use a \"shunt\" on one side of the pole, meaning one line remains hot at all times; miswiring this can cause a short circuit or prevent the unit from shutting down. During your diagnostic check, inspect the contact points for \"charring\" or black soot; if found, replace the contactor immediately to prevent a voltage drop that could damage your expensive compressor. Always ensure the 24V thermostat wires are securely fastened to the side coil terminals to prevent intermittent starting issues.\u003c\/p\u003e\n\u003ch2\u003eCross-Reference\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded Parts:\u003c\/strong\u003e CTR02573, CTR01147, D155355P01, SFCTR1P30A24V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Drawing Numbers:\u003c\/strong\u003e 170-400-11, 1012-920, C147094P02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite-Rodgers\/Emerson Equivalents:\u003c\/strong\u003e Emerson 90-161, Packard C130A, Mars 17325, Honeywell DP1030A1017\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModel Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4TTR\u003c\/strong\u003e (Suffixes: 3018, 3024, 3030, 4018, 4024)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4TWR\u003c\/strong\u003e (Suffixes: 3018, 3024, 4018, 4024)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2TTR\u003c\/strong\u003e (Suffixes: 2018, 2024, 3018, 3024)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4A7A\u003c\/strong\u003e (Suffixes: 3018, 3024, 4018, 4024)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4A6H\u003c\/strong\u003e (Suffixes: 4018, 4024, 5018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Trane \/ American Standard","offers":[{"title":"Default Title","offer_id":52451493216619,"sku":"662766532454","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/SFCTR1P30A24VSA2L.jpg?v=1772225406"},{"product_id":"tradepro-p-n-tp-con-2-24-40-a-genuine-oem-definite-purpose-contactor-2-pole-24v-40a","title":"TRADEPRO P\/N TP-CON-2\/24\/40-A  Genuine OEM Definite Purpose Contactor (2-Pole, 24V, 40A)","description":"\u003cp\u003eThe \u003cstrong\u003eTRADEPRO TP-CON-2\/24\/40-A\u003c\/strong\u003e is a Genuine Original Equipment Manufacturer (OEM) definite purpose contactor designed for high-performance switching in residential and light commercial air conditioning and heat pump systems. This heavy-duty 2-pole contactor is engineered to manage the high-current electrical loads of compressors and fan motors, ensuring reliable system start-ups and operation. Choosing an authentic TRADEPRO replacement ensures the exact electrical ratings and mounting compatibility required by your HVAC unit, preventing premature component failure or safety hazards common with lower-quality generic alternatives.\u003c\/p\u003e\n\u003cp\u003eBeing a Genuine OEM component (Catalog Number \u003cstrong\u003eTP-CON-2\/24\/40-A\u003c\/strong\u003e), it features silver cadmium oxide contacts and a durable injection-molded housing for superior heat resistance and electrical conductivity. This specific model is a versatile replacement for most major 1-phase HVAC brands, providing a stable 24V control circuit for standard equipment. Installing the original factory part maintains the system's UL\/CSA certifications and ensures compliance with factory-spec safety protocols.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefinite Purpose Design:\u003c\/strong\u003e Optimized specifically for HVAC and refrigeration systems with a focus on durability and high cycle life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability:\u003c\/strong\u003e Official TRADEPRO replacement (distributed by Carrier Enterprise) built to factory standards for exact fitment and long-term durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Contact Life:\u003c\/strong\u003e High-grade silver cadmium oxide contacts resist pitting and welding under heavy electrical loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Mounting:\u003c\/strong\u003e Features a universal foot-mounting base that allows for easy replacement of most 2-pole contactor brands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e TP-CON-2\/24\/40-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog #:\u003c\/strong\u003e TP-CON-2\/24\/40-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e TRADEPRO (Distributed by Carrier Enterprise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Definite Purpose Contactor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Voltage:\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Load Amps (FLA):\u003c\/strong\u003e 40A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistive Amps (RES):\u003c\/strong\u003e 50A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching Voltage:\u003c\/strong\u003e Up to 600 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Connection:\u003c\/strong\u003e Lug or Quick Connect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Shipping Weight:\u003c\/strong\u003e 0.75 LB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip: The \"Pitting and Buzzing\" Test\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOver time, the high-voltage contacts inside your TP-CON-2\/24\/40-A will begin to \"pit\" or develop carbon buildup from electrical arcing. If you hear a loud \"buzzing\" or \"chattering\" sound when the unit calls for cooling, or if your outdoor fan runs but the compressor won't start, the contactor is likely failing. Even if the coil tests fine with a multimeter, excessive pitting creates high resistance that can overheat and destroy your compressor. Always replace a noisy or burnt contactor immediately to avoid a much more expensive repair.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TP-CON-2\/24\/40-A is a direct OEM replacement for the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM \u0026amp; Catalog Numbers:\u003c\/strong\u003e TP-CON-2\/24\/40-A, TP-CON-2\/24\/40, HN51KC024, HN51KB024, DP2040A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand Specific Replacements:\u003c\/strong\u003e Carrier TT-CON-2\/24\/40, Supco DP40242, Honeywell DP2040A5002, Siemens\/Furnas 42BF35AF.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eExtensive Model Compatibility List:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Use 'CTRL+F' to search for your specific model:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarrier\/Bryant\/Payne:\u003c\/strong\u003e Found in numerous 1-phase air conditioning condensers and heat pump outdoor units (e.g., 2.5 to 5 ton units).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResidential Series:\u003c\/strong\u003e Compatible with various Lennox, Trane, and York residential units requiring a 2-pole, 24V, 40A contactor.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TRADEPRO®","offers":[{"title":"Default Title","offer_id":52451518120299,"sku":"817506020308","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/Contactor1-24-40.jpg?v=1774387022"},{"product_id":"trane-ctr03021-oem-definite-purpose-contactor-2-pole-24v-40a","title":"Trane CTR03021 – OEM Definite Purpose Contactor | 2-Pole | 24V | 40A","description":"\u003ch1\u003eTrane P\/N CTR03021 – Genuine OEM Definite Purpose Contactor (2-Pole, 24V, 40A)\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eTrane CTR03021\u003c\/strong\u003e is a Genuine Original Equipment Manufacturer (OEM) definite purpose contactor, primarily used in Trane and American Standard air conditioning and heat pump systems. This heavy-duty 2-pole contactor is engineered to manage the high-current electrical loads of compressors and fan motors, ensuring reliable system start-ups and operation. Choosing an authentic Trane replacement ensures the exact electrical ratings and mounting compatibility required by your HVAC unit, preventing premature component failure or safety hazards common with lower-quality generic alternatives. \u003c\/p\u003e\n\u003cp\u003eBeing an authentic OEM component, the CTR03021 features high-grade electrical contacts and a durable housing designed for superior heat resistance and electrical conductivity. This specific model is a standard replacement part, providing a stable 24V control circuit for single-phase equipment. Installing the original factory part maintains the system's UL\/CSA certifications and ensures compliance with factory-spec safety protocols.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefinite Purpose Design:\u003c\/strong\u003e Optimized specifically for HVAC and refrigeration systems with a focus on durability and high cycle life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability:\u003c\/strong\u003e Official Trane replacement built to factory standards for exact fitment and long-term durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Contact Life:\u003c\/strong\u003e High-grade contacts resist pitting and welding under heavy electrical loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Mounting:\u003c\/strong\u003e Features a universal foot-mounting base that allows for easy replacement in most 2-pole applications. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e CTR03021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog #:\u003c\/strong\u003e N\/A (Part number serves as catalog ID)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Trane \/ American Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Definite Purpose Contactor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Voltage:\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Load Amps (FLA):\u003c\/strong\u003e 40A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistive Amps (RES):\u003c\/strong\u003e 40A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching Voltage:\u003c\/strong\u003e Up to 600 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Connection:\u003c\/strong\u003e Lug or Quick Connect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Shipping Weight:\u003c\/strong\u003e 0.7 LB \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip: The \"Pitting and Buzzing\" Test\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eOver time, the high-voltage contacts inside your CTR03021 will begin to \"pit\" or develop carbon buildup from electrical arcing. If you hear a loud \"buzzing\" or \"chattering\" sound when the unit calls for cooling, or if your outdoor fan runs but the compressor won't start, the contactor is likely failing. Even if the coil tests fine with a multimeter, excessive pitting creates high resistance that can overheat and destroy your compressor. Always replace a noisy or burnt contactor immediately to avoid a much more expensive repair. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe CTR03021 is a direct OEM replacement for the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM \u0026amp; Catalog Numbers:\u003c\/strong\u003e CTR03021, CNT03021, HW20AA107, 3021.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand Specific Replacements:\u003c\/strong\u003e Honeywell DP2030A5002, Supco DP30242, Mars 33234. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eExtensive Model Compatibility List:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eNote: Use 'CTRL+F' to search for your specific model:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTrane\/American Standard AC and HP Units (Specific Models):\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e4TTA3030A1000AA, 4TTA3036A1000AA, 4TTA4030A1000AA, 4TTA4036A1000AA\u003c\/li\u003e\n\u003cli\u003e2TTA3F36A1000AA, 2TTB3F36A1000AA\u003c\/li\u003e\n\u003cli\u003e4TWB3030A1000AA, 4TWB3036A1000AA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"TRANE US INC","offers":[{"title":"Default Title","offer_id":52929103626603,"sku":"CTR03021","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/CTR03021.jpg?v=1771604176"}],"url":"https:\/\/tophvacparts.com\/collections\/contactors.oembed","provider":"HVAC Parts and Equipment Depot","version":"1.0","type":"link"}