SCROLL TECH ST-R125 KE-TFD-3PH-460V60HZ-R407 COMPRESSOR

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SCROLL TECH ST-R125 KE-TFD-3PH-460V-60HZ-R407

Scroll Compressor (≈ 10 HP / ~125,000 BTU class, industrial voltage version)

This is the TFD high-voltage variant of the ScrollTech ST-R125 series, designed for commercial HVAC and chiller applications using R407C refrigerant and operating on 3-phase 460V / 60Hz power.

It is in the same performance class as Copeland ZR125KCE-TFD-950 scroll compressors, which are widely used in North American and industrial HVAC systems.


Key Specifications (ST-R125 TFD version)

  • Brand: ScrollTech
  • Model: ST-R125 KE-TFD
  • Compressor type: Hermetic scroll
  • Refrigerant: R407C (also compatible with R22/R134a in equivalent designs)
  • Power supply: 3-Phase, 460V / 60Hz
  • Capacity: ~125,000 BTU/h (≈ 10 HP class)
  • Oil type: POE oil
  • Application: Commercial AC / rooftop units / small chillers

Electrical / Design Notes

  • TFD” = high-voltage scroll motor configuration (380–420V / 460V class family)
  • Built-in internal motor protection
  • Requires external contactor + overload relay
  • No capacitor (3-phase direct drive)
  • Designed for continuous commercial duty

Equivalent Industry Reference

This compressor is closely aligned with:

  • Copeland ZR125KCE-TFD-950
  • Cooling capacity: ~125,000 BTU (≈ 27 kW range)
  • Typical suction/discharge:
    • Suction: 1-3/8”
    • Discharge: 7/8”

Typical Applications

  • 10 ton commercial split systems
  • Rooftop packaged air conditioners
  • Small air-cooled chillers
  • Large VRF fixed-speed compressor circuits

Key Features

  • High efficiency scroll design
  • Low vibration and noise
  • Stable performance under heavy load
  • POE oil system for R407C
  • Industrial-grade 460V operation 

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