PCM-S4A20C 12.8V 20A LFP 32650

Protection Circuit Module (PCM) for LiFePO4 Battery Pack LFP32600 4 Series Connection 12.8V 20A limited  


No. Items  Parameters
1 Voltage Charging voltage DC:14.4V CC/CV(3.6V/1cell)
2 Current Current consumption for single cell ≤50μA
Maximal continuous discharging current 20A
3 Overcharge Protection Over charge detection voltage 15.60±0.025V
Over charge detection delay time 0.5S~1.5S
Over charge release voltage 15.20±0.025V
4 Over-discharge Protection Over discharge detection voltage 2.3±0.0V
Over discharge detection delay time 0.5~1.5S
Over discharge release voltage 2.7±0.08V
5 Over Current Protection Over current detection voltage 0.1V±0.025V
Over current detection current 100±10A(adjustale)
Detection delay time 5ms~15ms
Release condition Cot load
6 Short Protection Detection condition Exterior short circuit
Detection delay time 200-500us
Release condition Cut load
7 Resistance Protection circuitry ≤20mΩ
8 Temperature Operating temperature range -40℃~+85℃
Storage temperature range -40℃~+125℃
9 Size Length x Width x Thickness 61mm*61mm*5mm (2.40″x 2.4″x0.20″)
10 Usage 32600 size batteries 4S1P Configuration


  • The PCM is specially designed for LiFePo4 4S 12.8V with 20A discharging rate.
  • In case of high constant current more than 10A,  it’s strongly recommended that additional protection components to ensure safety, for example, polyswitch, NTC, fuse,etc.
  • The safety PCM is specially designed for professionals. Mis-understanding and abuse use may cause battery damaged or overheated, even exploded.



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