MATEKSYS PM12S-3 Power Module

The MATEKSYS PM12S-3 is a high-voltage power module built for heavy-lift cinelifters, X-Class rigs and agricultural drones running 3S to 12S packs. It steps a wide 9–55V input down to usable rail voltages while feeding your flight controller an analogue battery-voltage signal.

Key features

• Three independent step-down regulators on one board: a fixed 5V BEC, a fixed 12V BEC and a selectable Vx rail (5.25V, 6V or 8V) for cameras, servos or other high-current peripherals.
• The Vx rail handles up to 15A continuous (25A peak), well beyond a typical flight-controller BEC, for driving gimbals or onboard lighting.
• Built-in 1K:20K voltage divider reports battery voltage to ArduPilot, INAV or Betaflight (no current sensor on board).
• Ships with a low-ESR 390µF/63V capacitor to smooth a noisy main power input before it reaches the regulators.
• Large, well-spaced pads accept heavy-gauge power leads for high-current multirotor and fixed-wing builds.

Specifications

• Input voltage: 9–55V (3S–12S LiPo), TVS-protected
• BEC 5V: 4A continuous, 6A peak
• BEC 12V: 4A continuous, 6A peak (needs ≥13V input)
• BEC Vx: 5.25V/6V/8V, 15A continuous, 25A peak
• Voltage divider: 1K:20K (1/21 of input voltage)
• Reverse-polarity protection: none
• Short-circuit tolerance: 2 seconds (all rails)
• Size: 61 x 40 x 15mm
• Weight: 53g

The 12V rail needs at least 13V in to regulate cleanly, so it's only usable from 4S upward — plan peripheral wiring accordingly on 3S builds.