We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Supco Hard Start Kit: 3 Wire, 270-324 MFD, 208 to 277V AC, 4 hp to 5 hp - Hard Start Kits
SupcoHard Start Kits

Supco Hard Start Kit: 3 Wire, 270-324 MFD, 208 to 277V AC, 4 hp to 5 hp

The SUPCO Hard Start Kit: 3 Wire (MPN 3W3) is a hard start kit for reciprocating compressors with a cooling capacity range of 4 to 5 ton. It features a control voltage of 208 to 277V AC and a capacitance of 270-324…

SKU 3G-OTH-67892

Brand
Supco
Item
Hard Start Kit: 3 Wire, 270-324 MFD, 208 to 277V AC, 4 hp to 5 hp
Category
Hard Start Kits
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Supco
Manufacturer Part Number
3W3
Type
4 hp to 5 hp, Mechanical Potential Relay
AC
208 to 277V
MFD
270-324
Control Voltage
208 to 277V AC
For Compressor Type
Reciprocating
For Cooling Capacity Range
4 to 5 ton

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The SUPCO Hard Start Kit: 3 Wire (MPN 3W3) is a hard start kit for reciprocating compressors with a cooling capacity range of 4 to 5 ton. It features a control voltage of 208 to 277V AC and a capacitance of 270-324 MFD, suitable for 4 hp to 5 hp applications. This kit includes a mechanical potential relay.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the SUPCO Hard Start Kit 3W3 used for?

The SUPCO Hard Start Kit 3W3 is used to provide additional starting torque for reciprocating compressors in HVAC systems, typically in 4 to 5 ton cooling capacity applications. It helps prevent hard starting and extends compressor life.

What are the specifications of the SUPCO Hard Start Kit 3W3?

The SUPCO Hard Start Kit 3W3 has a control voltage of 208 to 277V AC, capacitance of 270-324 MFD, and is rated for 4 hp to 5 hp compressors. It includes a mechanical potential relay and is designed for reciprocating compressors with 4 to 5 ton cooling capacity.

Where to buy the SUPCO Hard Start Kit 3W3 worldwide?

You can source the SUPCO Hard Start Kit 3W3 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.

How to install the SUPCO Hard Start Kit 3W3?

To install the SUPCO Hard Start Kit 3W3, first disconnect power to the compressor. Connect the three wires per the wiring diagram: the potential relay coil and capacitor in series with the start winding. Ensure the voltage matches 208 to 277V AC. Always follow local electrical codes.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Hard Start: 2 Wire, 88-108 MFD, 208 to 277V AC, 1/2 hp to 3 hp, Electronic Potential Relay (MPN SPP6E)
Supco
Hard Start: 2 Wire, 88-108 MFD, 208 to 277V AC, 1/2 hp to 3 hp, Electronic Potential Relay (MPN SPP6E)
Hard Start Kit: 2 Wire, 43-53 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP5)
Supco
Hard Start Kit: 2 Wire, 43-53 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP5)
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)
Supco
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)
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)

More from Supco

View all Supco parts
Hard Start Kit: 3 Wire, 88-108 MFD, 208 to 277V AC, 1 hp to 3 hp, Mechanical Potential Relay (MPN 3W1)
Supco
Hard Start Kit: 3 Wire, 88-108 MFD, 208 to 277V AC, 1 hp to 3 hp, Mechanical Potential Relay (MPN 3W1)
Hard Start Kit: 3 Wire, 145-175 MFD, 115V AC, 1/12 hp to 1/5 hp, Positive Temp Coefficient Relay (MPN RCO810)
Supco
Hard Start Kit: 3 Wire, 145-175 MFD, 115V AC, 1/12 hp to 1/5 hp, Positive Temp Coefficient Relay (MPN RCO810)
Hard Start Kit: 2 Wire, 130-156 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP6)
Supco
Hard Start Kit: 2 Wire, 130-156 MFD, 90-277V AC, 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP6)
Hard Start Kit: 3 Wire, 189-227 MFD, 208 to 277V AC, 3 1/2 hp to 5 hp, Mechanical Potential Relay (MPN 3W2)
Supco
Hard Start Kit: 3 Wire, 189-227 MFD, 208 to 277V AC, 3 1/2 hp to 5 hp, Mechanical Potential Relay (MPN 3W2)
Hard Start Kit: 3 Wire, 243-292 MFD, 115V AC, 1/4 hp to 1/3 hp, Positive Temp Coefficient Relay (MPN RCO410)
Supco
Hard Start Kit: 3 Wire, 243-292 MFD, 115V AC, 1/4 hp to 1/3 hp, Positive Temp Coefficient Relay (MPN RCO410)
Hard Start: 5 Wire, 243-292 MFD, 115V AC, 1/3 hp to 1/2 hp, Mechanical Potential Relay (MPN RCO210)
Supco
Hard Start: 5 Wire, 243-292 MFD, 115V AC, 1/3 hp to 1/2 hp, Mechanical Potential Relay (MPN RCO210)
Hard Start Kit: 2 Wire, 130-156 MFD, 90-277V AC, 1 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP7S)
Supco
Hard Start Kit: 2 Wire, 130-156 MFD, 90-277V AC, 1 1/2 hp to 10 hp, Positive Temp Coefficient Relay (MPN SPP7S)
Hard Start: 2 Wire, 270-324 MFD, 208 to 277V AC, 3 1/2 hp to 5 hp, Mechanical Potential Relay (MPN MPR1)
Supco
Hard Start: 2 Wire, 270-324 MFD, 208 to 277V AC, 3 1/2 hp to 5 hp, Mechanical Potential Relay (MPN MPR1)