Fail-Safe Transfer Switch C-16HF2, Metered, (16) C13 Outlets, 20A 208-240V - 3.3kW

Please note, the ServerTech C-16HF2-C20 has been discontinued. For replacement options, please contact your Server Racks Online sales representative.

ServerTech C-16HF2-C20 - Click to enlarge

Server Technology

Dimensions2U (3.48"H) x 17.2"W x 14.13"D

The Server Technology C-16HF2/E Fail-Safe Transfer Switch (FSTS) provides fail-over redundancy to single or dual power supply servers and network devices. Exclusive to the Fail-Safe Transfer Switch is its ability to carry loads on both the A and B circuits during normal operation. Unlike a common automatic transfer switch, the Fail-Safe unit is unique in that the "A" in-feed routinely powers half the outlets, and the "B" in-feed routinely powers the other half. However, if either in-feed goes down, the other powers all outlets. This "Fail-Safe" method has several advantages compared to a standard ATS. A standard ATS contains two-in-feeds, but runs all outlets from just one source, with the secondary source only being used once an outage occurs. The Server Technology design does not prohibit load balancing between the two supplied circuits which results in less heat and a lower voltage drop compared to the same load existing on just one source. Only when an outage occurs on one of the two sources will the entire load be applied to a single source.

Metered (not networked)

  • Digital True RMS input current at 10% and 0.1 amp resolution (to 9.9 amps measurement, 1 amp at > 10 amp).

Transfer Rate

  • Power transfer in 10-16 milliseconds maximum

Input Power

  • Dual Power Source Input
  • Each input supplies power to half of the outlets
  • Input power cables for NEMA L5-30P, L6-30P, IEC 60390/C19

Voltage Range

  • 208-240V (configurable)
  • Inputs must have same voltage

Indicator LEDs

  • Monitor load per circuit

UPS Compatibility

  • Transfer Switch is compatible with a UPS that provides a sin wave AC output waveform.

Environmental Requirements

  • Operating: 32° to 104°F (0° to 40°C) Temperature - 8% to 90% non-condensing Humidity
  • Storage: -40° to 185°F (-40° to 85°C) Temperature - 8% to 90% non-condensing Humidity


  • cTUVus UL 60950-1:2007
  • CAN/CSA 22.2 No. 60950-1-07
  • TUVGS EN 60950-1:2006
  • FCC Class A, Part 15

Branch Circuit Protection

  • Compliant to UL 60905-1
  • UL248 listed fuses, 20A
  • Two (2) branches per input
  • Current Rating: <16A; Interrupt rated at 100kAIC


  • Server Technology offers a standard 2-year limited parts & labor warranty. Extended support is available at the time of purchase.