Triad isolation transformers are power transformers for isolating equipment from direct connection to the power line. They are offered in a variety of voltages and case types. Triad isolation transformers are also offered in hospital type (designed with an MD suffix) which are designed and constructed to meet the low leakage current requirements for today’s medical equipment. The transformers are constructed with nonconcentrically wound coils. The primary and secondary are wound on separate arbors, then assembled on a laminate core side-by-side separated by insulation. This prevents electrical connection, under normal or overload conditions, between the primary and secondary windings. These hospital type units are offered with a resettable circuit breaker, providing protection from overload and short circuit conditions.
Unit of Measure

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Output Wattage (VA) Rating

N/A 250 W

Primary Voltage

N/A 115 V230 V

Primary Frequency

N/A 50 Hz60 Hz

Secondary Voltage (±5%)

N/A 115 V

Secondary Current

N/A 2.170 A

Case Type



N/A Leads

Lead Holes Used

N/A 2

Height (H)

N/A 4 5/8 in

Width (W)

N/A 3 15/16 in

Depth (D)

N/A 4 5/8 in

Mounting Width

N/A 3 in

Mounting Depth

N/A 3 5/8 in

Mounting Hole Size

N/A 3/8 x 3/16 in


N/A 11.00 lb

Technical Notes

Technical Notes

  1. Line cord, plug and receptacle are U.L. listed and verified to meet federal specifications.
  2. Connections are by leads, plugs and sockets.
  3. Hi-pot tested at 1,500 VRMS.



N/A Split winding