Robertshaw 5501-378 Infinite Switch

The Robertshaw 5501-378 Infinite Switch is a heavy-duty 240V infinite control switch designed for precision temperature management in electric ranges and commercial heating equipment. Engineered as a parallel circuit voltage sensing switch, this M-series component offers proportional power control for resistive loads, making it a reliable direct replacement for 5501-378 and various OEM 5500-series models. As a veteran-grade electric range infinite switch, it features a smaller, compact housing that simplifies installation in tight control panels while maintaining an 15-amp capacity at 100°C. Technicians typically utilize this Robertshaw 5501-378 for its robust mechanical design and consistent heating element power control, providing a significant upgrade over standard bimetal switches. It supports multiple terminal configurations (L1, L2, H1, H2, and P for pilot lights) and is compatible with both clockwise and counterclockwise rotation shafts.

• Universal Compatibility: Engineered as a functional replacement for numerous 5500-series Robertshaw switches, reducing the need for extensive truck stock.
• Precise Calibration: Features a low-heat on-time of 2% to 9% at a 45-degree arc, ensuring stable temperature thresholds for sensitive HVACR heating applications.
• Durable Construction: Rated for up to 15 Amps at 240 VAC, providing high-load stability for commercial-grade heating elements.
• Installation Flexibility: Includes an 8-32 UNC mounting nut with 2.5 threads of engagement for more secure fastening than stamped helix designs.

How do I confirm the Robertshaw 5501-378 wiring for a pilot light?
Standard wiring involves connecting line power to L1 and L2, the load to H1 and H2, and the signal for the indicator light to the P terminal. Always verify the common side of the line matches the original configuration to avoid damaging the switch internal contacts.

Is the 5501-378 compatible with 120V systems?
No, this specific model is a 240V infinite switch. Utilizing a 240V switch on a 120V circuit will cause improper calibration and potential failure of the heating element's duty cycle. For 120V applications, use the corresponding Robertshaw 5500-102 series.

What should I do if the shaft length doesn't match the original dial?
Most Robertshaw infinite switches feature "break-off" shafts with specific grooves. Measure the depth needed, secure the shaft with pliers at the nearest groove, and snap it to the required length before installing the dial adaptor.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.