PCM-S4A30 12.8V 30A LFP Balance Function

Protection Circuit Module (PCM) for LiFePO4 Battery Pack LFP32600 4 Series Connection 12.8V 30A limited  with Balance Function

Protection Circuit Module Specifications  For 12.8V LiFePO4 Battery  Pack
Over-charge protection voltage 15.60 V±25 mV
Over-discharge protection voltage 2.3±0.08V
Over-current protection 100-140A
Maximal continuous Discharging current 30A
Maximal Current consumption ≤20uA
Short circuit protection Automatic Recovery
Protection  circuitry  resistance (B- TO P-) ≤30mΩ
Dimension 110mm(4.3″) x 95mm(3.7″) x 6mm(0.2″)
Weight 49 grams
P+/P- P+ = Charge+ / Discharge +
P- = Charge- / Discharge –


  • The PCM is specially designed for LiFePo4 4S 12.8V with 30A discharging rate. It’s different from others, whose balance function is set to ensure battery  fully charged and safety.
  • PCM will detect each cell’s voltage and trim higher voltage down until other cells reach the same voltage level. Therefore, it helps batteries have longer service life.
  • 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 over-heated, even exploded.

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