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GTD20A - Transfer Switch 20A 120-277VAC

United Fuses
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GTD20A is a 20A emergency automatic transfer switch and bypass device designed to ensure uninterrupted power for generator or central inverter supplied lighting loads. It operates on a universal input voltage of 120-277VAC at 50/60 Hz, with a maximum lighting load rating of 20A, and automatically switches the load to an alternate power source upon loss of normal power. The device features relay switching circuitry housed in a wall-mountable enclosure measuring 9" x 6" x 3.5", weighing 5.19 lb, and is rated for indoor and damp locations with a temperature range of -4°F to 131°F (-20°C to +55°C). It is UL Listed for the US and Canada under UL 924 and UL 1008, and approved for all lighting types including LED, fluorescent, HID, and incandescent. Typical industrial applications include emergency lighting systems in commercial, institutional, and industrial facilities requiring reliable power transfer and bypass functionality.

Key Features & Specifications
  • Type: Emergency automatic transfer switch/bypass device
  • 20A maximum lighting load rating
  • Universal input voltage: 120-277VAC, 50/60 Hz
  • Wall-mountable enclosure
  • Indoor and damp location rated
  • UL Listed for US and Canada under UL 924 and UL 1008
  • Temperature rating: -4°F to 131°F (-20°C to +55°C)
  • Dimensions: 9" x 6" x 3.5"
  • Weight: 5.19 lb
  • Approved for all lighting types (LED, fluorescent, HID, incandescent)
  • Includes three dry form C contacts for flexible wiring
  • 5-year full warranty (not pro-rata)
  • Mounting: 8.5" x 2.5"