SupcoHVAC Equipment

Supco Starter SPP 5

Supco Starter SPP 5 is a 3-wire mechanical potential relay hard start device for HVAC compressors, rated at 35 amps with voltage sensing and instant restart capabilities. It reduces inrush current during motor…

SKU 3G-CBM-01269

Also listed as: COP 04003 · COP-04003

Brand

Supco

Item

Starter SPP 5

Local availability & support

Delivery: Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment: Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Supco

type

3-Wire Mechanical Potential Relay Hard Start 

features

Voltage Sensing, Instant Re-start 

relay contacts

35 Amp 

Datasheet Content

®




                                                                 3 Series
            Three Wire Mechanical Potential Relay Hard Starts
               For Professionals who prefer OEM-Style 3- Wire Installation
  The 3 Series Hard Starts provide the service professional
with an OEM option when the application calls for a hard start.
      Combining a potential relay and start capacitor the
          3 Series provides a True 3-Wire solution.
Benefits
• Voltage Sensing
• Instant Re-start
• 35 Amp Relay Contacts
• Quick Installation with EZ Snap Bracket
• 2 Year Warranty
                                                                      EZ Snap
Applications                                                          Bracket
• All 208/ 240 V Single Phase Compressors
• Scroll compressors
• Reciprocating compressors
• Can be used with Single or Dual Run Capacitors

 PART NO.   APPLICATION       VOLTAGE      CAPACITOR (330 V)   REPLACES 5-2-1
 3W1           1 – 3 hp     208/ 240 VAC      88 – 108 uF          CSRU1
 3W2         3.5 – 4.5 hp   208/ 240 VAC     189 – 227 uF          CSRU2
                                                                                ®
 3W3           4 – 5 hp     208/ 240 VAC     270 – 324 uF          CSRU3


                            Installation Diagram
                                                                                                           ®




CHOOSE SUPCO for ALL of your Hard Start needs:
SPP Series for reliable, field proven, UL recognized PTC style Hard Start Kits
• Economic
• Easy 2-wire Installation
  PART                                         TORQUE
  NO.          VOLTAGE            APPLICATION INCREASE
  SPP5         90 – 277 VAC       1/2 to 10 hp 300%                                       ®
  SPP6         90 – 277 VAC       1/2 to 10 hp    500%
  SPP7S        90 – 277 VAC       1/2 to 10 hp    600%


“E” Class for Electronic Potential Relay (EPR) style Hard Start Kits
• Voltage Sensing
• Instant Re-start
• Easy 2-wire Installation

  PART                                         CAPACITOR
  NO.           VOLTAGE            APPLICATION SIZE (µF)                                 ®
  SPP5E         170 – 277 VAC      1/3 to 2 hp 43 to 52
  SPP6E         170 – 277 VAC      1/2 to 3 hp 88 to 106
  SPP8E         170 – 277 VAC      1 to 10 hp  189 to 227


ULTRASTART 2-wire Mechanical Potential Relay Hard Starts
• OEM Approved Technology           • Easy 2-wire installation
• Voltage Sensing                   • 2 Year Warranty
• Instant Re-start

 PART NO.       APPLICATION          CAPACITOR SIZE              REPLACES
                                                                                         ®
 MPR5           1 to 3 hp            189-277µF; 330V             Kickstart® TO-5
 MPR1           3.5 to 5 hp          270-324 µF; 330V            Kickstart® KS-1
 MPR8           1 to 3 hp            108-130 µF; 330V            Kickstart® KS-8
 MPRM1          Maneurop             233-280 µF; 250V            Kickstart® MP-1

                                    SEALED UNIT PARTS CO., INC.
                                    PO Box 21, 2230 Landmark Place, Allenwood, NJ USA
                       Phone: 732-223-6644 • Fax: 732-223-1617 • www.supco.com • [email protected]   F441-11082010

Technical Documents

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Supco Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

Where can I buy the Supco SPP 5 hard start relay worldwide?

3G Electric is an authorized distributor of the Supco SPP 5 (35 amp 3-wire mechanical potential relay). We source and ship to facilities globally, handling logistics, customs, and delivery. Contact us for availability and lead time on request.

What is the lead time and shipping process for the Supco SPP 5?

Lead time depends on current stock and destination. 3G Electric arranges worldwide delivery and manages all logistics and customs clearance. Request a quote for your specific location and timeline.

What voltage does the Supco SPP 5 hard start relay support?

The Supco SPP 5 is a 3-wire mechanical potential relay rated at 35 amps, featuring voltage sensing and instant restart capabilities. It reduces inrush current during compressor motor startup in air conditioning and refrigeration systems. Consult the technical datasheet for specific voltage ratings.

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 hvac equipment. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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