ACK E-04 ELT Complete System Kit



ACK's E-04 ELT is a direct replacement for the more than 62,000 ACK E-01 ELT's models on the market today. The E-04 fits directly into the current E-01 mounting trays and uses the same remote control panel indicator. The E-04 external antenna will utilize your current antenna mounting and wiring installations. Hazmat charges may apply.

No HazMat Fees within CONUS with FedEx / UPS Ground   Free ELT Programming

Estimated delivery: May 21st - May 24th
Part Number: E-04 Category:

ACK E-04 ELT Complete System Kit

The E-04 is a 406 MHz/121.5 MHz ELT intended for use in general and commercial aviation and is a direct replacement for the E-01 ELT. This ELT fits the E-01 mounting trays, uses the same remote control panel indicator, and the E-04 external antenna can use the preexisting E-01 antenna mounting and wiring installation. The E-04 activates in the event of a crash and transmits a homing signal on 121.5 MHz for 48 hours while simultaneously transmitting a distress signal on 406 MHz to the Cospas-Sarsat system for up to 24 hours. Additionally, this unit can be interfaced with an aircraft’s GPS system and is capable of accepting GPS position input data from several different devices. GPS information can then be sent to search and rescue, which results in drastically reduced search times. When activated, the E-04 provides an aural alert with a simple plug-in alert indicator.

What’s included?

  • 121.5/406 MHz ELT transmitter (E-04) – including battery
  • Remote Switch with a horizontal placard (E-04.5)
  • Remote vertical placard (E-04.12.2)
  • Whip antenna (E-04.8)
  • Electrostatic discharger (E-
  • 60-feet coax cable (E-04.10.4)
  • Audio alert (E-04.7)
  • Mounting Tray (E-04.4)
  • Retaining strap front (E-04.4.1)
  • Retaining strap front (E-04.4.1)
  • Female 4 pin DIN plug (E-04.10.6)
  • 15-foot remote cable (E-04.10.5)
  • Audio alert cable (E-04.10.3)
  • Switch cover (E-04.11.1)
  • Installation/Operation/Manual (E-04M)

Additional information

Weight1.6 lbs
Dimensions7.75 × 2.85 × 2.85 in

ELT and battery pack: 1.6 lb (0.73 kg)
ELT tray and straps: 0.2 lb (0.09 kg)
remote control (RCPI): 1.1 oz (31 g)
audio alert indicator: 1.5 oz (43 g)


121.5 MHz and 406 MHz


406 MHz ±2 kHz Bi-Phase L (16KOG1D)
121.5 MHz ±6 kHz AM (3K20A3N)

Swept downward: 1,400 to 400 Hz
Repetition Rate: 3 Hz
Modulation Factor ≥90%
Duty Cycle: ≥45%

Power at Terminal (50Ω load)

121.5 MHz20.7 dBm 50 hrs @ -20°C
406 MHz 37.3 dBm 24.5 hrs @ -20°C
Standby Current Armed Mode: 26 uA
Peak Current: 406 MHz burst 1.5-2 A
Current 121.5 MHz Operation: 75 mA

Peak EIRP (with E-04.8 whip antenna and E-04.10.4 coax cable):
121.5 MHz +23 dBm 200mW, 406 MHz +39.79 dBm 12.7 W

Operating Temperature

-20°C to 55°C, operating
-55°C to 85°C, storage

Crash Activation

4.5 FpS ±0.5 FpS

ELT Approvals

FAA/Transport Canada
TSO C-126b TSO C-91a
ETSO 2C126 ETSO2C91a
Industry Canada 1863A-E04AF
Brazil ANAC

Battery Approvals

FAA/Transport Canada
TSO C-142a
ETSO C-142a
Brazil ANAC

Battery Life

5 yrs (when used with model E-04 ELT)

Battery Amp Hour Rating

7.75 Ah

Battery Type

Li-SO2, non-flammable electrolyte



ACK E-04 ELT Complete System

ACK E-04 ELT Complete System Kit