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SupcoFixed-Potential Relay

Supco Potential Relay: 280V AC to 310V AC Pick Up, 121V AC Drop Out, Fixed

The Supco 304X03 is a fixed-potential relay with a pickup voltage range of 280V AC to 310V AC and a maximum drop out voltage of 121V AC. It features a 420V AC coil voltage and an SPST contact form. This relay is…

SKU 3G-OTH-68837

Brand
Supco
Item
Potential Relay: 280V AC to 310V AC Pick Up, 121V AC Drop Out, Fixed
Category
Fixed-Potential Relay
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Technical Specifications

Supco
Manufacturer Part Number
9067
Coil Voltage
420V AC
Contact Form
SPST
Maximum Drop Out Voltage
121V AC
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Supco Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Supco 304X03 is a fixed-potential relay with a pickup voltage range of 280V AC to 310V AC and a maximum drop out voltage of 121V AC. It features a 420V AC coil voltage and an SPST contact form. This relay is designed for applications requiring a fixed potential relay with these specified electrical characteristics.

Frequently Asked Questions

What is the Supco 304X03 fixed-potential relay used for?

The Supco 304X03 fixed-potential relay is used in HVAC and refrigeration systems to control start windings in single-phase compressors. It picks up between 280V AC and 310V AC and drops out at 121V AC, ensuring reliable motor starting and protection.

What are the specifications of the Supco 304X03 relay?

The Supco 304X03 relay has a pickup voltage range of 280V AC to 310V AC, a maximum drop out voltage of 121V AC, a coil voltage of 420V AC, and an SPST contact form. The manufacturer part number is 9067.

Where to buy the Supco 304X03 relay worldwide?

You can source the Supco 304X03 relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct Supco relay for your application.

How to install a fixed-potential relay like the Supco 304X03?

To install the Supco 304X03, first disconnect power. Mount the relay securely, then connect the coil terminals per the wiring diagram. Ensure the pickup voltage (280V AC to 310V AC) matches your system. Test drop out at 121V AC. Always follow Supco's guidelines for safe operation.

Used in

Common applications for Supco
Commercial refrigeration display cases — Supco RO82 relay and CSS-25U starter for compressor motor control without run capacitors
Medium-load HVAC systems — Supco SPP 6/SPP 8 hard-start devices to reduce compressor inrush current and extend motor lifespan
Cold-chain pharmaceutical and food storage — SL300TH temperature–humidity data logger for continuous monitoring and regulatory documentation
Refrigerant service operations — Piercing valves and perforator cocks in 1/2" and 5/8" sizes for fast, non-invasive line access
Compressor thermal management — Universal Compressor Door for reducing shell temperature and improving efficiency in hot ambient conditions
Retrofit and field repairs — Supco controls with Quick Connect terminals for rapid installation in legacy refrigeration circuits

Supco Products

3G Electric supplies Supco fixed-potential relay. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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