We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
⌕
Sign inRFQ Cart
Supco logo

Supco

USAHVAC & Refrigeration

Supco manufactures electrical controls, refrigerant service tools, and diagnostic equipment for HVAC and refrigeration systems. The product portfolio spans compressor starters, hard-start devices, relays, service valves, and temperature monitoring instruments—components that field technicians and maintenance teams integrate into commercial and light industrial cooling circuits. Supco controls carry certifications including VDE for European compliance and are rated across standard voltage classes (115/230 VAC) and amperage ranges (1/12 hp through multi-ton compressor protection). The starter modules, such as the CSS-25U progressive unit, employ potential-relay and three-wire mechanical designs to manage inrush current and provide soft-start or instant-restart functionality depending on application requirements. Service-side tooling includes piercing valves, perforator cocks, and compressor doors—standardized in 1/4", 5/16", 3/8", 1/2", and 5/8" outlets to fit common refrigerant line diameters. Beyond controls and valves, Supco offers data-logging instruments like the SL300TH, which record temperature and humidity with configurable sampling intervals, tamper-proof archiving, and battery autonomy exceeding 20 months, supporting compliance and performance verification in temperature-critical environments. The product range reflects standard HVAC design practices rather than proprietary technology, making Supco components compatible across OEM brands in the commercial refrigeration and light industrial cooling sector.

106
In Collection
12,551
Full Catalog
1 Day
Quote Response
USA
Origin
Worldwide Shipping
Air & sea freight
Datasheets on Request
Technical specs & drawings
1-Day Quote Response
Singapore-based team
Show
Page 1 of 3
106 products
← Prev123Next →

About Supco

Supco manufactures electrical controls, refrigerant service tools, and diagnostic equipment for HVAC and refrigeration systems. The product portfolio spans compressor starters, hard-start devices, relays, service valves, and temperature monitoring instruments—components that field technicians and maintenance teams integrate into commercial and light industrial cooling circuits. Supco controls carry certifications including VDE for European compliance and are rated across standard voltage classes (115/230 VAC) and amperage ranges (1/12 hp through multi-ton compressor protection). The starter modules, such as the CSS-25U progressive unit, employ potential-relay and three-wire mechanical designs to manage inrush current and provide soft-start or instant-restart functionality depending on application requirements. Service-side tooling includes piercing valves, perforator cocks, and compressor doors—standardized in 1/4", 5/16", 3/8", 1/2", and 5/8" outlets to fit common refrigerant line diameters. Beyond controls and valves, Supco offers data-logging instruments like the SL300TH, which record temperature and humidity with configurable sampling intervals, tamper-proof archiving, and battery autonomy exceeding 20 months, supporting compliance and performance verification in temperature-critical environments. The product range reflects standard HVAC design practices rather than proprietary technology, making Supco components compatible across OEM brands in the commercial refrigeration and light industrial cooling sector.

Common Applications

  • 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
Origin: Manufactured in USA

Related brands we carry

Comparable manufacturers in the same product category.

Airsafe
Appion
Aspira Fantini
Atraxtool
Castel
DSZH

Frequently asked questions

Common questions about Supco from 3G Electric.

What compressor-starting devices does Supco offer, and what are their typical ratings?

Supco manufactures potential-relay and three-wire mechanical hard-start devices such as the SPP 6 and SPP 8 models, each with 35 amp relay contacts. The CSS-25U is a progressive starter module rated 25A with VDE certification, suited for larger compressor loads. These are designed for systems with or without run capacitors and include voltage-sensing and instant-restart features to limit inrush current and protect motor windings during compression cycles.

Which Supco relays are suitable for refrigeration without run capacitors?

The Supco RO82 relay is rated 1/12–1/2 hp at 115 or 230 VAC and is specified for refrigeration systems that do not use run capacitors. It features Quick Connect and pin-type terminals for direct mounting on standard control boards. This design simplifies installation in retrofit and service scenarios where run-capacitor circuits are not present or have failed.

What refrigerant service valves does Supco supply, and in which sizes?

Supco manufactures piercing valves (COP20001) and perforator cock outlets (COP20002) in standard diameters: 1/4", 5/16", 3/8", 1/2", and 5/8". Perforator cocks use hex socket head cap screws for secure fastening into refrigerant lines. Both valve types integrate into service manifolds and allow technicians to access or sample refrigerant without breaking primary connections.

How does the Supco SL300TH data logger support HVAC maintenance and compliance?

The SL300TH records temperature and humidity with sampling intervals from 1 second to 18 hours, storing over 10,000 measurements. It includes tamper-proof logging, configurable alarm thresholds with visual indication, and operates on 9V alkaline or lithium batteries for 20+ months. Technicians use it to verify cold-chain integrity, validate thermostat calibration, and document compliance in food service, pharmaceutical, and medical storage environments.

What is the Universal Compressor Door, and when would a technician use it?

The Supco Universal Compressor Door (COP22020) provides external protection and thermal insulation for compressor bodies during service and operation. It is installed over the compressor shell to reduce ambient heat gain in high-temperature environments, improve efficiency, and shield technicians from moving parts during troubleshooting or partial disassembly.

Are Supco controls certified for international or regional standards?

Yes. The Supco CSS-25U progressive starter carries VDE (Verband der Elektrotechnik) certification, confirming compliance with German and European electrical safety standards. This certification supports installation in EU-governed facilities and in OEM designs that mandate European compliance. Standard Supco relays and starters meet HVAC industry voltage and amperage ratings used across North America and global markets.