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Supco Overload Relay: Mfr Part # RO81 - Replacement HVACR Controls, Switches & Thermostats
SupcoReplacement HVACR Controls, Switches & Thermostats

Supco Overload Relay: Mfr Part # RO81

Supco Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Overload Relay.

SKU 3G-OTH-80024

Also listed as: RO 81 · RO-81

Brand
Supco
Item
Overload Relay: Mfr Part # RO81
Category
Replacement HVACR Controls, Switches & Thermostats
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Technical Specifications

Supco
Manufacturer Part Number
RO81
Product Type
Overload Relay

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Supco Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

Supco Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Overload Relay.

Frequently Asked Questions

What is the SUPCO RO81 overload relay used for?

The SUPCO RO81 overload relay is used in HVACR systems to protect compressors and motors from damage caused by excessive current. It trips when current exceeds a safe threshold, preventing overheating and failure. This replacement part is common in commercial refrigeration and air conditioning applications.

What are the specifications of the SUPCO RO81 overload relay?

The SUPCO RO81 is an overload relay with manufacturer part number RO81. It is designed as a replacement HVACR control for compressors and motors. Key specs include its product type as an overload relay, but detailed electrical ratings should be verified against the original equipment. Always match the relay to the compressor's amperage and voltage.

Where to buy the SUPCO RO81 overload relay worldwide?

You can source the SUPCO RO81 overload relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time; we provide this Supco replacement part for HVACR systems.

How to install the SUPCO RO81 overload relay?

To install the SUPCO RO81 overload relay, first disconnect power and discharge capacitors. Remove the faulty relay and connect the new RO81 to the compressor terminals, ensuring proper alignment and tight connections. Follow the manufacturer's wiring diagram for your specific HVACR unit. Test operation after 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 replacement hvacr controls, switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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