Picture of product TS835

Part #:

Model: TS835




Emergency Power Supply

Part Number :

  • Emergency Power Supply
  • Direct replacement for L-3 Avionics/JET PS-835 or PS-855 (same rack mount and connector)
    • Note: Replacement is for most Part 23 installations only  -  see FAQ
  • 24.5 VDC, 4.5 Amp, Lithium, TSO
  • Automatically provides 24.5 VDC power for critical or standby equipment in the event of aircraft power failure
  • 4.5 amp-hour Nanophosphate lithium-ion battery
  • Utilizes A123 Systems’ advanced Nanophosphate lithium-ion technology — an energy storage solution with superior safety and abuse tolerance compared to metal oxide lithium-ion chemistries
  • Maintains full charge by recharging during normal flight operations
  • Lightweight — 63% lighter than legacy lead-acid designs
  • Two-year maintenance schedule
  • 10-year life expectancy
  • Two-year limited warranty




Capacity: 4.5 amp-hour battery nominal input voltage: 24 – 32 VDC, 15 amps max
output power: 24.5 VDC nominal, 20 amps max weight: 4.8 lbs — 8 pounds lighter than legacy lead-acid designs
dimensions: 3.1” H x 12.7” L x 2.4” W (approximate) Life expectancy: 10 years
protection: Factory replaceable fuse mating connector: DPXB13-33S-0001
rack mount install: 1/4 ATR rack optional vent kit: MCI P/N 9017983
remote test switch: Remote-mounted self-test switch required, MCI P/N 9017176 or equivalent case: Anodized aluminum, blue
certification: FAA TSO C179a certified, EASA ETSO C179a certified, ANAC TSO C179a certified, Part 23 AML STC certified, RTCA/DO-160F qualified, RTCA/DO-311 qualified
Part Number: Description:
md835-1 Emergency Power Supply
md835-5 includes integrated 3.0-5.5 VDC adjustable output


FAA TSO C179a certified EASA ETSO C179a certified ANAC TSO C179a certified Part 23 AML STC certified RTCA/DO-160F qualified RTCA/DO-311 qualified
- Emergency Power Supply

NSN: 6130-01-665-4173

Price Condition Status
- Emergency Power Supply
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact questions@seaerospace.com

Yes, the MD835 can directly replace the PS-835 in certain Part 23 aircraft installations. As of May 2023, there are no Part 25 STCs available for the MD835. Please contact us to inquire if your aircraft is approved for this upgrade replacement.

In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.