Low-voltage disconnect (12 V, 30 A)
MOSFET battery protector · Lead-acid: off 10.5 V, back on 12.0 V · 10 s delay · 30 A
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: 12 V battery protector / low-voltage disconnect, 30 A (MOSFET switch)
Pins
- IN+ (battery +)
- OUT+ (load +)
- GND
Ratings and limits
| Switch | N-MOSFETs in the positive line, about 2 mΩ, 30 A continuous |
|---|---|
| Cut-off | the load goes off when the battery stays below the cut-off for the delay (default 10 s, so a motor start does not trip it) |
| Reconnect | the load comes back only when the battery rises above the reconnect voltage (the hysteresis) and stays there 30 s |
| Settings | Lead-acid: off 10.5 V, back on 12.0 V · Lead-acid, gentler: off 11.5 V, back on 12.8 V · LiFePO4 12.8 V: off 12.0 V, back on 13.0 V · Li-ion 3S: off 9.6 V, back on 11.1 V |
| Own current | about 1.5 mA on, 0.6 mA off: it slows a flat battery’s drain, it does not stop it |
| Not for chargers | it is for loads: a charger on OUT+ would be switched off with the load |
How to use it
Over-discharge protection without a full BMS: between a 12 V battery and its loads (lights, fan, inverter input under 30 A). Set the cut-off for the chemistry.
More in batteries & cells
- 9 V battery
- AA cell
- 18650 Li-ion cell
- 21700 Li-ion cell
- LiFePO4 cell
- LiFePO4 prismatic cell
- LiFePO4 prismatic cell 50 Ah
- LiFePO4 prismatic cell 105 Ah
- Flat Li-ion battery
- 18650 battery holder
Sources: Victron BatteryProtect manual (delay, hysteresis presets); generic 12 V LVD modules.