PCM-S2A20 6.4V20A with Balance Function

Protection Circuit Module (PCM) with Balance Function for 2 cells (6.4V) LiFePO4 Battery Pack at 20A limited


Protection Circuit Module for 6.4V LiFePO4 Battery  Pack   * Li-Ion 7.2V/7.4V optional
Model: PCM-S2A7 6.4V20A with balance function
Over-charge protection voltage of single cell 3.85±0.025V
Over-discharge protection voltage of single cell 2.00±0.05V
Over-current detection protection 60A   *peak current
Maximal continuous Discharging current 20A  constant current
Maximal Current consumption 25uA
Protection  circuitry  resistance (B- TO P-) ≤30mΩ
Dimension  120mm(4.7″) x 37mm(1.5″) x 5.0mm(0.2″)
Weight 3Oz (8.5 grams)
P+/P-/BM P+ = Charge+ / Discharge +
P- = Charge- / Discharge –


  • In case of high constant current more than 10A,  it’s strongly recommended that additional protection components to protect the battery itself, 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.
  • Please don’t use the PCM for lower capacity or low drain LiFePO4 pack.  Make sure your LiFePO4 Battery pack can handle 20A drain current before buying
  • To achieve balance, each cell in battery pack must has equal voltage within tolerance of 0.2V.

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