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  • Altronix AL125ULB Altronix AL125ULB

Altronix AL125ULB 2 PTC Outputs Power Supply Board. 12/24VDC

Altronix | SKU: AL125ULB | Model: AL125ULB

Product Highlights

Power Supply/Charger - 12VDC or 24VDC @ 1 amp, latching/non-latching fire alarm disconnect, (24VAC 40VA Plug-in xfmr required), UL Recognized.
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AL125ULB is a Two (2) Output Switching Power Supply/Charger that converts a low voltage AC input into two (2) individually PTC protected 12VDC or 24VDC outputs.


  • 24VAC, 40VA from UL Listed, Class 2 transformer.
  • Access control trigger input.


  • 12VDC or 24VDC selectable outputs.
  • 1 amp supply current.
  • Two (2) Class 2 Rated power limited outputs.
    • Fail-Safe/Fail-Secure lock output (switched).
    • Auxiliary power output (unswitched).
  • PTC protected outputs, rated @ 2.5 amp.
  • Filtered and electronically regulated output.
  • Short circuit and thermal overload protection.

Battery Backup:

  • Built-in charger for sealed lead acid or gel type batteries.
  • Automatic switchover to stand-by battery when AC fails.
  • Maximum charge current 0.4 amp.


  • Supervised Fire Alarm Disconnect (Latching w/reset or Non-Latching).


  • Operating temperature: 0 degree C to 49 degree C ambient.
  • 6.14 or 12.28 BTU/Hr.
  • System AC input VA requirement: 55.2VA

Additional Information

Product SKU AL125ULB
Brand Altronix
Condition New
Power Supply Type Board
# of Outputs 2
Output Protection PTC
Input Voltage 24 VAC
Output Voltage 12 VDC, 24 VDC
Output Current 2.5 Amp
Features UL Listed
Input Voltage 24VAC
Number of Outputs 1
Output Type DC
Certifications NFPA, UL
Version Board
Power Options 1 amp @ 12VDC, 1 amp @ 24VDC
Battery Charging Yes
Fire Alarm Interface Yes
Output Protection PTC
  • (1) Power Supply/Charger
  • Lifetime Warranty