Allied-Signal Aircraft Transformer Rectifier Unit 28VDC 9B40-27-A

Technical Description

High-capacity aircraft Transformer Rectifier Unit (TRU) manufactured by Allied-Signal Aerospace under Bendix engineering specifications (CAGE Code 83298). Engineered to convert primary AC aircraft power into clean, regulated DC voltage for onboard avionics, flight controls, and battery charging infrastructure. Configured for a 3-phase AC input of 115 Volts at 30 Amps and a standard aircraft line frequency of 400 Hz. Delivers a high-amperage continuous DC output rated at 28 Volts and 300 Amps. Housed in a heavy-duty chassis featuring built-in dedicated directional forced-air cooling paths indicated by a fixed airflow alignment vector on the exterior housing to prevent thermal overload during peak load operations.

Component Specifications