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Small green circuit board with two USB-A ports and screw terminals

JacobsParts Inc.

JacobsParts Inc. USBMOD-M 48W Step-Down Power Adapter 12-30V Dual USB QC 3.0

SKU CH-A2FB-V7KXX

Converts 6-30V DC to dual USB fast charging with 48W total output and 90-97% efficiency

  • Supply voltage12 V
  • Rated power48 W
  • Product typeStep Down (Buck) Voltage Regulator
  • Key featuresDC to DC
  • Fast charge two devices from any 6-30 V DC source
  • Each port delivers up to 24 W at 5 V 3.4 A, 9 V 2.5 A or 12 V 2 A
  • 90-97 % conversion efficiency reduces heat and power loss
  • Supports QC 2.0/3.0, BC 1.2, MTK PE 1.1/2.0, AFC and SFCP protocols
  • Built-in over-voltage, under-voltage, over-current, short-circuit and thermal protection

48W Step-Down USB Charger

The JacobsParts USBMOD-M converts a 12-30 V DC source into two USB fast-charge ports. Each port delivers up to 24 W at 5 V 3.4 A, 9 V 2.5 A or 12 V 2 A. It suits installers adding USB power to vehicles, solar setups or industrial equipment.

Buck Module Integration

The board accepts 6-30 V input and regulates down with 90-97 % efficiency. Built-in over-voltage, under-voltage, over-current, short-circuit and thermal protection guard connected devices. A heat-dissipating PCB and 220 kHz switching frequency keep temperatures low without an external heatsink.

Replaces Separate Chargers

This module replaces individual car chargers or AC adapters when a DC supply is already present. The jump is worthwhile when you need QC 3.0, AFC, SFCP, BC 1.2 or MTK PE 1.1/2.0 from a single 12 V or 24 V rail. It does not suit buyers who need AC mains input or more than two USB ports.

How it compares

Measured against everything we stock in AC Adapters & Power Bricks, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 97% of the 3,875 comparable items (median $23.99).

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Specifications

Product
Brand nameJacobsParts
Model nameUSBMOD-M
Product typeStep Down (Buck) Voltage Regulator
Power
Supply voltage12 V
Rated power48 W

Questions about this item

What is the maximum continuous power the USBMOD-M can deliver before thermal protection engages?

The module is rated for 48 W total, with each USB port limited to 24 W. Thermal protection activates if sustained output exceeds the design limits.

How much heat and noise does the 220 kHz switching regulator produce under all-day load?

The 220 kHz buck converter uses a heat-dissipating PCB and has no fan, so operation is silent and warmth stays moderate at 90-97 % efficiency.

Which DC power sources can I connect to the 6-30 V input terminals?

Any 6-30 V DC supply — such as a 12 V or 24 V battery, solar panel, or regulated adapter — that can provide up to 48 W will work.

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