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5-2-1 COMPRESSOR SAVER Compressor Saver: 3 Wire, 270-324 MFD, 208 to 240V AC, 4 hp to 5 hp - Hard Start Kits
5-2-1 COMPRESSOR SAVERHard Start Kits

5-2-1 COMPRESSOR SAVER Compressor Saver: 3 Wire, 270-324 MFD, 208 to 240V AC, 4 hp to 5 hp

The 5-2-1 COMPRESSOR SAVER CSRU3 is a 3-wire hard start kit designed for reciprocating compressors with a cooling capacity range of 4 to 5 tons. It operates at a control voltage of 208 to 240V AC and features a…

SKU 3G-OTH-67869

Also listed as: CSRU 3 · CSRU-3

Brand
5-2-1 COMPRESSOR SAVER
Item
Compressor Saver: 3 Wire, 270-324 MFD, 208 to 240V AC, 4 hp to 5 hp
Category
Hard Start Kits
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

5-2-1 COMPRESSOR SAVER
Manufacturer Part Number
CSRU3
Type
4 hp to 5 hp, Instant Restart
AC
208 to 240V
MFD
270-324
Control Voltage
208 to 240V AC
For Compressor Type
Reciprocating
For Cooling Capacity Range
4 to 5 ton

Technical Documents

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5-2-1 COMPRESSOR SAVER Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The 5-2-1 COMPRESSOR SAVER CSRU3 is a 3-wire hard start kit designed for reciprocating compressors with a cooling capacity range of 4 to 5 tons. It operates at a control voltage of 208 to 240V AC and features a capacitance of 270-324 MFD, supporting 4 hp to 5 hp motors with instant restart capability.

Frequently Asked Questions

What is the 5-2-1 Compressor Saver CSRU3 used for?

The 5-2-1 Compressor Saver CSRU3 is a hard start kit used to provide extra starting torque for reciprocating compressors in HVAC systems. It is designed for 4 to 5 ton cooling capacity units operating at 208 to 240V AC, helping prevent compressor short-cycling and extending equipment life.

What are the specifications of the 5-2-1 Compressor Saver CSRU3?

The 5-2-1 Compressor Saver CSRU3 is a 3-wire hard start kit with a capacitance range of 270-324 MFD. It supports 4 hp to 5 hp motors and operates at 208 to 240V AC. It is designed for reciprocating compressors with a cooling capacity of 4 to 5 tons and includes instant restart capability.

Where to buy the 5-2-1 Compressor Saver CSRU3 worldwide?

You can source the 5-2-1 Compressor Saver CSRU3 from 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 on this hard start kit.

How to install the 5-2-1 Compressor Saver CSRU3?

Install the 5-2-1 Compressor Saver CSRU3 by connecting the three wires to the compressor terminals: common, run, and start. Ensure power is off before installation. Follow the manufacturer's wiring diagram for your specific reciprocating compressor model. Always verify voltage compatibility (208 to 240V AC) before use.

Used in

Common applications for 5-2-1 COMPRESSOR SAVER
Residential air conditioning — 5-2-1 COMPRESSOR SAVER CSRU1 hard start kit for 1-3 ton reciprocating compressors
Light commercial HVAC — 5-2-1 COMPRESSOR SAVER CSRU2 hard start kit for 3.5-5 ton reciprocating compressors
Heat pump systems — 5-2-1 COMPRESSOR SAVER CSRU3 hard start kit for 4-5 ton reciprocating compressors
HVAC surge protection — 5-2-1 COMPRESSOR SAVER TPSPD external-mount SPD for single-phase 120/240V AC equipment
Refrigeration compressor startup — 5-2-1 COMPRESSOR SAVER CSRU series for reducing start-up stress in reciprocating compressors

5-2-1 COMPRESSOR SAVER Products

3G Electric supplies 5-2-1 COMPRESSOR SAVER 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 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: 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 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: 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)
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)

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Compressor Saver: 3 Wire, 189-227 MFD, 208 to 240V AC, 3 1/2 hp to 5 hp, Instant Restart (MPN CSRU2)
5-2-1 COMPRESSOR SAVER
Compressor Saver: 3 Wire, 189-227 MFD, 208 to 240V AC, 3 1/2 hp to 5 hp, Instant Restart (MPN CSRU2)
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)