Railroad (A75R)

Railroad (A75R)

SCR Technology

Output :
12 or 24 VDC
10, 20, 30, 40, 60 Amps

120/208-240 VAC



The La Marche A75R series battery chargers are specifically developed for the railroad market using proven SCR charging technology. Integrated features and functions are ideal for signaling, highway crossing, defect detectors and PTC’s (positive train control). This filtered unit is designed and built to charge VRLA, Flooded Lead Acid and Nickel Cadmium batteries. A75R’s are packed with valued added features to make your DC system more reliable. Internal digital temperature compensation circuitry prolongs battery life with optional external temperature sensor that can be mounted near the battery system. State of the art lightning protection circuit protects the unit against lightning surges. Charger failure contacts are provided for remote annunciation. Remote shutdown capability allows the user to test DC System integrity or remotely shutdown the unit in emergency situations. Mechanically designed to handle the most abusive environmental conditions. The A75R is built in NEMA 1 enclosure and equipped with AREMA style hardware for the input and output connections. This convection cooled unit has components conservatively chosen to achieve MTBF in excess of 100,000 hours.   

 • Microprocessor Controlled SCR Technology
 • AC Input: 120/240VAC (50Hz/60Hz)
 • Available DC Output: 12VDC and 24VDC
 • Superior Surge and Lightning Protection
 • Automatic AC Input Voltage Selection for 10-40 Amp Models with No Tap Changes Required
 • Integrated Charger Failure Alarm with Form “C” Contacts
 • Selectable Low DC Current Alarm to Detect When Charger is Not in Service (Output Current is Below .1A)
 • Remote Shutdown Capability for Placing Charger Offline for Battery Testing Purposes
 • Higher Temperature (Class H) Transformer Insulation and Conservative Component Selection with Greater Safety Margins in Abusive Environments
 • 3 years Warranty 

User Manuals
AC InputSingle Phase 120/240V ±10%50Hz / 60Hz ±5%
Load Regulation<±0.5%
Input ProtectionFuse with surge protection
Output Current LimitFactory set at 100%, adjustable from 50-105%
Output ProtectionDC breaker or fuse with surge protection
MetersDC Output Digital Voltmeter (1%)DC Output Analog Ammeter (2%)
LED IndicatorsCurrent LimitTemperature Compensation DisableAC OnNickel CadmiumLead AcidCharger Fail
DC Output12 Volts @ 10 Amps, 20 Amps, 40 Amps and 60 AmpsLead Acid: 5L, 6L, 7L and 8LNi-Cad: 8NC, 9NC, 10NC, 11NC, 12NC24 Volts @ 30 AmpsLead Acid: 10L, 12L, 14L and 16LNi-Cad: 16NC, 18NC, 20NC, 22NC, 24NC
Adjustable Voltage Range (per cell)Adjustable Voltage Range (per cell)Lead-Acid Cells: 2.15 VDC to 2.35 VDCNi-Cad: 1.39 VDC to 1.49 VDC
MountingThe enclosures can be wall or shelf mounted
Cable EntryTop
FinishPowder coat finish (RAL 7032)
StandardsMeets AREMA specificationsMeets ANSI C62-41

Controls11WExternal Temperature Probe 24ft
11YExternal Temperature Probe 100ft