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Supco Hard Start Kit: 3 Wire, 88-108 MFD, 208 to 277V AC, 1 hp to 3 hp - Hard Start Kits
SupcoHard Start Kits

Supco Hard Start Kit: 3 Wire, 88-108 MFD, 208 to 277V AC, 1 hp to 3 hp

The Supco Hard Start Kit: 3 Wire (SKU 3W1, MPN 3W1) is a hard start kit for scroll compressors with a cooling capacity range of 1 to 3 ton. It operates at a control voltage of 208 to 277V AC and includes a mechanical…

SKU 3G-OTH-67757

Brand
Supco
Item
Hard Start Kit: 3 Wire, 88-108 MFD, 208 to 277V AC, 1 hp to 3 hp
Category
Hard Start Kits
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Technical Specifications

Supco
Manufacturer Part Number
3W1
Type
1 hp to 3 hp, Mechanical Potential Relay
AC
208 to 277V
MFD
88-108
Control Voltage
208 to 277V AC
For Compressor Type
Scroll
For Cooling Capacity Range
1 to 3 ton

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

Product Description

The Supco Hard Start Kit: 3 Wire (SKU 3W1, MPN 3W1) is a hard start kit for scroll compressors with a cooling capacity range of 1 to 3 ton. It operates at a control voltage of 208 to 277V AC and includes a mechanical potential relay with 88-108 MFD capacitance, suitable for 1 hp to 3 hp compressors.

Frequently Asked Questions

What is the Supco 3W1 hard start kit used for?

The Supco 3W1 hard start kit is used to provide additional starting torque for scroll compressors in HVAC systems. It is designed for compressors with a cooling capacity of 1 to 3 tons and a horsepower range of 1 hp to 3 hp, helping prevent hard-start issues and extending compressor life.

What are the specifications of the Supco 3W1 hard start kit?

The Supco 3W1 hard start kit features a mechanical potential relay with 88-108 MFD capacitance and operates at a control voltage of 208 to 277V AC. It is compatible with scroll compressors rated 1 hp to 3 hp and 1 to 3 tons cooling capacity. The kit includes a 3-wire design for easy installation.

Where to buy the Supco 3W1 hard start kit worldwide?

You can source the Supco 3W1 hard start kit through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Supco components for HVAC applications.

How to install the Supco 3W1 hard start kit?

To install the Supco 3W1 hard start kit, first disconnect power to the compressor. Connect the three wires per the Supco wiring diagram: typically the relay coil and capacitor leads to the compressor terminals. Ensure the voltage matches 208 to 277V AC. Always follow local electrical codes and the manufacturer's instructions 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 hard start kits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Hard Start Kit: 3 Wire, 270-324 MFD, 208 to 277V AC, 4 hp to 5 hp, Mechanical Potential Relay (MPN 3W3)
Supco
Hard Start Kit: 3 Wire, 270-324 MFD, 208 to 277V AC, 4 hp to 5 hp, Mechanical Potential Relay (MPN 3W3)
Hard Start: 2 Wire, 189-227 MFD, 208 to 277V AC, 1 hp to 3 hp, For 1 to 3 ton Cooling Capacity Range (MPN MPR5)
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Hard Start: 2 Wire, 189-227 MFD, 208 to 277V AC, 1 hp to 3 hp, For 1 to 3 ton Cooling Capacity Range (MPN MPR5)
Hard Start Kit: 2 Wire, 43-53 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP5)
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Hard Start Kit: 2 Wire, 43-53 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP5)
Compressor Saver: 3 Wire, 88-108 MFD, 208 to 240V AC, 4 hp to 5 hp, Instant Restart (MPN CSRU1)
5-2-1 COMPRESSOR SAVER
Compressor Saver: 3 Wire, 88-108 MFD, 208 to 240V AC, 4 hp to 5 hp, Instant Restart (MPN CSRU1)

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