MD41-24P(28) Relay Unit, Model MD41, 28V, PMA’d



MD41-24P(28) Relay Unit, Model MD41, 28V, PMA’d

MD41-24P(28) Relay Unit Description

The MD41-24P(28) is a remote mounted transfer relay unit specifically designed for switching a CDI or also HSI Indicator between two aircraft radio navigation systems. The remote switching unit is designed for use with GPS systems where the user desires to share a common CDI or HSI between an existing NAV system and a GPS system.

The 24 pole unit features eight relay pairs consisting of 3 poles per relay pair. Each relay pair can be activated individually by either voltage or ground keying or as a group by ground keying.

MD41-24P(28), 24 pole relay for 28-volt operation.


  • Mounting: Bulkhead
  • Width: 3.86 Inches
  • Heght: 1.52 Inches
  • Also, Depth: 2.60 Inches
  • Weight: 0.75 lb
  • Applicable Documents: RTCA DO-160C, and also DO-208
  • Operating Temperature Range: -55 to +70°C
  • Humidity: 95% Non-Condensin
  • Altitude Range: 0 to 55,000
  • Vibration: Cat. M
  • Lastly, Operational Shock: Rigid Mounting, 6 G Operational (15 G Crash Safe)

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