Supco SPP5 Hard Start Kit

The Supco SPP5 hard start kit, a core component of the Super Boost series, is engineered to significantly increase compressor starting torque by up to 300%. This field-proven AC hard start capacitor kit utilizes a high-performance PTC (Positive Temperature Coefficient) relay and start capacitor combination to deliver the electrical surge necessary for single phase compressors to overcome inertia, specifically in high-head pressure or low-voltage scenarios. Designed for 90V to 277V applications, this 2-wire hard start kit is a universal solution for PSC type compressors from 1/2 HP up to 10 HP. By reducing the duration of compressor startup, the SPP5 minimizes heat generation and protects internal windings, making it an essential tool for technicians reviving aging refrigeration systems or optimizing residential air conditioning units. This unit is a direct cross reference for S1-024-25084-000, 6903, 1053137, and 6820 (which includes a removable PTC).

• 300% Torque Increase: Provides the necessary mechanical force to start hard starting compressors under high-load conditions.
• 90V-277V Versatility: A reliable universal hard start kit suitable for a wide range of residential and light commercial HVACR equipment.
• 2-Wire Parallel Installation: Simplifies field service with a rapid connection to the existing run capacitor terminals.
• System Protection: Reduces the high inrush current that leads to nuisance breaker trips and prevents motor overheating during the start cycle.
• NATE Recognized: Meets professional industry standards (Course #1867-0002) for consistent performance in challenging environments.

When should I install a Supco SPP5 vs a potential relay kit?
The SPP5 is the most economical choice for standard PSC compressors and refrigeration systems with capillary tubes or fixed orifices. If you are dealing with a TXV (Thermal Expansion Valve) system or require precision timing for sensitive industrial motors, an electronic potential relay like the SPP6 or SPR1 may be preferred, but for most residential single phase service calls for hard starting, the SPP5 provides the required 300% boost.

Can I mount the SPP5 in any orientation?
No. For optimal PTC relay operation and thermal dissipation, the Supco SPP5 should always be mounted in an upright position inside the electrical cabinet. Ensure the leads are secured away from high-heat components to maintain the capacitor's 43-53 MFD rating integrity.

Will this work on both scroll and reciprocating compressors?
Yes, the SPP5 is compatible with both scroll and reciprocating compressors. It is particularly effective on older reciprocating units that have developed higher internal resistance over time or when linesets are exceptionally long, causing significant voltage drop at the moment of ignition.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.