Trane Service First SFCTR1P30A24VSA2L Contactor 1P 30A 24VAC Screw Terminals A2L OEM Replacement

The 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.

Key Features

• Genuine OEM Part Number SFCTR1P30A24VSA2L: Guaranteed factory-direct fit for Trane and American Standard units, ensuring terminal alignment and mounting footprint accuracy.
• Heavy-Duty 30 Amp Rating: Engineered to handle the high-inrush starting current of residential compressors without overheating or premature coil failure.
• Fixes Sticking Relay and Noise Issues: Replaces aging contactors prone to loud humming, buzzing, or "welded" contacts that cause the outdoor unit to run even when the thermostat is off.
• Advanced Safety Monitoring: Features a dust-shielded enclosure to prevent debris and insects from entering the contact points, a leading cause of electrical shorts.
• A2L Refrigerant Compatibility: Specifically designed to meet the electrical arc suppression requirements for modern systems utilizing A2L mildly flammable refrigerants.

Product Details

• Brand: Trane / American Standard
• Manufacturer: Service First
• Part Number: SFCTR1P30A24VSA2L
• Poles: 1 Pole (with Shunt)
• Full Load Amps: 30A
• Coil Voltage: 24 VAC
• Frequency: 50/60 Hz
• Terminal Type: Screw Terminals with Quick Connects
• Locked Rotor Amps: 150/180A (at 240V/480V)
• Weight: 0.6 lbs

🛠️ HVAC Depot Pro Tip

Take a Picture First — 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.

Cross-Reference

• Superseded Parts: CTR02573, CTR01147, D155355P01, SFCTR1P30A24V
• Legacy Drawing Numbers: 170-400-11, 1012-920, C147094P02
• White-Rodgers/Emerson Equivalents: Emerson 90-161, Packard C130A, Mars 17325, Honeywell DP1030A1017

Model Compatibility

• 4TTR (Suffixes: 3018, 3024, 3030, 4018, 4024)
• 4TWR (Suffixes: 3018, 3024, 4018, 4024)
• 2TTR (Suffixes: 2018, 2024, 3018, 3024)
• 4A7A (Suffixes: 3018, 3024, 4018, 4024)
• 4A6H (Suffixes: 4018, 4024, 5018)