ebc 502h

Quality compatibility are guaranteed with EBC’s accessories and replacement components.

ELT with audible monitor and 720 degree spherical automatic activation. Transmits on 121.5 & 243.0 MHz and meets TSO-C91a. Is mounted in the cabin and has an integral antenna.

Product Manual

The EBC 502H adapts all the ingenious characteristics of the EBC 502 to the special needs of helicopters. It has FAA and FCC TSO-C91a approval.

Designed to be mounted within reach of the pilot, co-pilot or crew, the EBC 502H meets the increased survivability needs of the helicopter environment. As with all EBC ELTs, its electronic and activation systems are completely encapsulated for increased protection against shock and moisture, and extra protection is provided for the crystal. Its true 360˚ spherical 6-axis G-switch design makes it specially equipped to tackle the problems unique to helicopter flight, for when a chopper goes down, it can go down in any number of directions,
making the ordinary single axis G-switch inadequate. The EBC 502H has been engineered for helicopter operation by reducing sensitivity to low-frequency turbine and rotor input. Our design makes the ELT more immune to false activation yet retains high sensitivity to actual crash situations. True to the advances of the EBC 502 series, the EBC 502H also has been outfitted with an external aural monitor that emits a loud beeping tone upon activation of the unit.


  • EBC 502H – Yellow baked enamel aluminum case
  • Size: 2.5″W x 2″D x 8.5″H
  • Weight: 2.75 lbs. with battery pack installed
  • Flexible non-telescoping antenna extends 19″ above transmitter body


  • Intended for installation in cockpit or cabin area
  • Recessed 3 position toggle switch
  • 2 year parts and labor warranty
  • Comes complete with mounting bracket, battery pack and aural monitor
  • Uses one GS-52 alkaline battery pack
  • FAA TSO-C91a Approved
  • Audible Monitor alert when activated
  • True 360˚ spherical G-Switch horizontally and vertically


Range Satellite: 1200+ miles
Range Search Aircraft: Line of Sight
Operating Life 120 hours or more @ 21˚C
Operating Temperature -20˚C to +55˚C
Transmit Frequency Both 121.5 MHz and 243.0 MHz
Frequency Stability +/- 0.005%
Shock Resistance Withstands up to 1000 Gs
Waterproof Complete submersion in salt water up to 24 hrs.
Modulation Swept tone 1600 Hz to 300 Hz, 2-4 times per second
Power 50mW PERP after 50 hours @ -20˚C


*Disclaimer: Distress signals on 121.5 or 243.0 Mhz are legal but in 2009 processing of the signals by Search and Rescue personnel was discontinued.