# BMS module 3S, 12.6V, 20A

> BMS module for Li-Ion 3S battery packs, total voltage 12.6V at full charge, without balancing function. Nominal current 20A. Overcharge protection 4.25-4.35V per cell and over-discharge protection 2.3-3.0V per cell. Internal resistance below 150mAh. Dimensions 51 x 23 x 4 mm. Suitable for battery packs made of 3 18650 cells.

- Page: https://sigmanortec.ro/en/bms-module-3s-126v-20a
- Price: 10.08 RON
- Availability: In stock; 1-2 zile
- Reference: 33561 · EAN: 5940142291261
- Category: Electronic components > Modules for Batteries > BMS Boards
- Specifications: Technology: Lithium Ion; Load voltage: 12.6VDC; sway: Not; Number of cells: 3S
- Package (shipping data): 0.006 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:25 (Europe/Bucharest)

## Description

BMS board for 3S Li-ion packs, provides charge and discharge protection for 3 18650 cells, with a total voltage of 12.6V at full charge. Offers overcharge protection 4.25-4.35V and overdischarge protection 2.3-3.0V per cell, supports current up to 20A, has internal resistance below 150mAh and compact size 51 x 23 x 4 mm.
The BMS board provides overcharge/discharge protection for lithium cells in a 3S configuration, total voltage 12.6V (charged). Ideal for batteries composed of 3 cells of type 18650.
Specifications:
Overcharge protection per cell: 4.25 - 4.35V
Overdischarge protection per cell: 2.3 - 3.0V
Maximum operating current: 20A
Internal resistance: