MARS 19550 Relay

The MARS 19550 Relay is a heavy-duty submersible pump potential relay specifically designed for high-moisture environments. A direct 1-to-1 replacement for the GE 3ARR3MARS550, this component is engineered to withstand the rigorous demands of submersible pump control panels where high humidity and organic contaminants often cause standard relays to fail. It features chrome plating on the core and armature, minimizing the contact surface area to prevent armature sticking—a primary cause of system downtime in residential and commercial pumping applications.

Operating with a continuous coil voltage of 130V, the MARS 19550 is calibrated for precise motor starting performance. It provides a pick-up voltage range of 111V to 134V and a drop-out voltage range of 15V to 40V, ensuring reliable capacitor-start capacitor-run (CSR) motor operation. This non-positional potential relay includes a universal break-off bracket and multiple adapters, allowing technicians to quickly convert push-on terminals to screw-on connections in the field. Its versatile design makes it a standard inventory item for servicing major brands such as Franklin Electric, Red Jacket, and Grundfos.

Key Benefits for Technicians:

• High Humidity Resistance: Chrome-plated internal components prevent corrosion and sticking in damp control boxes.
• Universal Field Compatibility: Identical to 3ARR3MARS550 and features a break-off bracket to match various mounting footprints.
• Reliable Motor Starting: Precise voltage calibration protects start windings by ensuring the start capacitor is removed from the circuit at exactly 75-80% of full motor speed.
• Broad Cross-Reference: Replaces over 25 OEM part numbers across FE Myers, Jacuzzi, and Sta-Rite systems.
• Simplified Installation: Non-positional mounting allows for vertical or horizontal orientation without affecting switching relay performance.

Common Questions about the MARS 19550:

Is the MARS 19550 compatible with 3ARR3MARS550?
Yes, the 19550 is the direct replacement and functionally identical to the 3ARR3MARS550. It maintains the same electrical specifications and housing dimensions.

What causes a potential relay to buzz or fail in a pump system?
Buzzing often indicates worn pivot points or high-resistance contacts. Moisture-induced sticking is the most common failure mode, which this model addresses with specialized plating.

Can I use this relay on a motor higher than 130V?
This relay is specifically rated for a 130V continuous coil. Using it in higher voltage applications may exceed the breakdown voltage and lead to premature coil failure.

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.