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SupcoFixed-Potential Relay

Supco Potential Relay: 314V AC to 342V AC Pick Up, 135V AC Drop Out, Fixed

The Supco 304X04 is a fixed-potential relay with a pickup voltage range of 314V AC to 342V AC and a maximum drop out voltage of 135V AC. It features a 502V AC coil voltage and an SPST contact form. This relay is…

SKU 3G-OTH-68542

Brand
Supco
Item
Potential Relay: 314V AC to 342V AC Pick Up, 135V AC Drop Out, Fixed
Category
Fixed-Potential Relay
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Technical Specifications

Supco
Manufacturer Part Number
9068
Coil Voltage
502V AC
Contact Form
SPST
Maximum Drop Out Voltage
135V AC
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Supco Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Supco 304X04 is a fixed-potential relay with a pickup voltage range of 314V AC to 342V AC and a maximum drop out voltage of 135V AC. It features a 502V AC coil voltage and an SPST contact form. This relay is manufactured by Supco under part number 9068.

Frequently Asked Questions

What is the Supco 304X04 potential relay used for?

The Supco 304X04 fixed-potential relay is used in HVAC and refrigeration systems to control start windings in single-phase compressors. It disconnects the start capacitor once the motor reaches sufficient speed, preventing overheating and improving efficiency.

What are the specifications of the Supco 304X04 potential relay?

The Supco 304X04 has a pickup voltage range of 314V AC to 342V AC, a maximum drop out voltage of 135V AC, and a coil voltage of 502V AC. It features an SPST contact form and is manufactured by Supco under part number 9068.

Where to buy the Supco 304X04 potential relay worldwide?

You can source the Supco 304X04 potential relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring reliable supply for your operations.

How to install the Supco 304X04 potential relay?

To install the Supco 304X04, first disconnect power and verify the relay's pickup and drop-out voltages match your compressor specs. Mount it securely, connect the SPST contacts per the wiring diagram, and test operation. Always follow Supco's guidelines for safe installation.

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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