Stecamat 312

Processor-controlled lead-acid battery charger and power supply unit


The Stecamat 312 battery charger and power supply unit is available from 12 V to 36 V with a rated power of 430 W to 650 W, also with automatic switching. Parallel consumers can be supplied
up to the maximum device current. Your battery is charged gently and quickly by the processor-controlled charging process. This also allows pre-damaged or deeply discharged
batteries to be treated, making a long service life possible with the Stecamat 312. Clear, large and illuminated displays give you quick information about the
charging status.

The Stecamat 312 charger is suitable for use in vehicles with its robust and splash-proof housing. A high ambient temperature range with convection cooling
and the simple operation ensure seamless operation. The selective on-board power supply protection circuit ensures the greatest possible safety during operation on vehicles. Its extensive accessories means that the ideal solution can be created for
any application. For example, a special fire engine version is available.


Product features

  • IP 54 splash-proof casing
  • Half the charging time compared to simple, non-controlled chargers with the same rated current
  • Optimal for charging batteries with liquid electrolyte and gel / absorbed electrolyte (AGM)
  • Suitable for totally discharged batteries
  • Constant battery operational readiness through integrated trickle charge
  • Ready for operation in just a few minutes
  • Charging below the gassing voltage
  • Optimal charging of damaged batteries
  • Individually programmed upon request

Electronic protection functions

  • Protection in the case of wrong or damaged batteries
  • Battery overcharge protection
  • Charger output protected against short circuits, reverse polarity and overvoltage


  • 3-digit 7-segment LED display
  • for voltage, current, charged capacity
  • 5 LEDs show operating states
  • for charging (pre-charging) recharging, trickle charging, piping error, battery fault


  • Mains grid switch


  • Steca ventilation system in accordance with DIN EN 50272


  •  Stecamat 312 productdatasheet DE · pdf · 0,920 MB
  •  Stecamat 312 productdatasheet EN · pdf · 0.919 MB
  •  Stecamat 312 product pic 3D · jpg, 300 DPI, high quality · 1.023 MB
  •  Stecamat 312 product pic 3D · jpg, 72 DPI, web quality · 0.177 MB

Technical data

Charging rated voltage
12 V
24 V
36 V
12 V
Charge current
30 A
20 A
15 A
30 A
End-of-charge voltage
14.4 V
28.8 V
43.2 V
14.4 V
Trickle charge voltage
13.8 V
27.6 V
41.4 V
13.8 V
Characteristic curve
Grid voltage
230 V AC ±10 %, can be switched to 115 V AC ±10 %
Frequency range
50 Hz / 60 Hz
Mains electricity (230 V)
3.3 A
Mains electricity (110 V)
6.6 A
Discharge current during grid failure
1.3 mA
2.6 mA
3.9 mA
2.6 mA
Protection class
metal, coated
Degree of protection
IP 54
Ambient temperature
-20 °C … +60 °C
Cooling principle
Dimensions (X x Y x Z)
310 x 358 x 145 mm
15.0 kg
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