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Green circuit board with relay and terminal blocks

WMtec

WMtec Power Supply 5V to 48V Board Relay Module UPS 2 in 1 accessory

SKU CH-BNRQ-MBJ9J

Provides 5V to 48V power-off protection and automatic UPS switching

  • Wide 5 V to 48 V input range suits many power sources
  • Relay-based automatic switching keeps equipment running during mains loss
  • Power-off protection prevents unexpected shutdowns and data loss
  • Emergency battery cut-off safeguards connected hardware from deep discharge

5V to 48V relay module for power switching

This board combines a relay module with UPS-style automatic switching for DC inputs between 5V and 48V. It detects a power loss and cuts the load to protect connected equipment. The unit suits hobbyists and engineers building custom battery-backup or safety cut-off circuits. No enclosure or wiring is included.

Replaces separate relay

Use this module when a single board must handle both emergency cut-off and automatic source switching. It is not suited for AC mains voltages or for systems that require programmable thresholds, communication interfaces or higher current ratings than the relay contacts provide.

How it compares

Measured against everything we stock in 2-in-1 Device Accessories, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 97% of the 7,473 comparable items (median $56.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What voltage range does the relay module support for the power supply input?

The relay module handles a supply voltage from 5 V up to 48 V, covering both low-voltage logic rails and higher-voltage battery or DC bus inputs.

Which wiring step is most often missed when installing the automatic switching module?

Connecting the battery-sense lead to the correct polarity terminal is the step most frequently overlooked; without it the UPS cut-off will not trigger.

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