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Green PCB circuit board with LM337 regulator chip and adjustable potentiometers

Vszerda

Vszerda LM337 XR-103 Adjustable Power Supply Board

SKU CH-X5SN-40KN3

Adjustable regulated power supply board delivering ±1.25 V to 30 V at up to 1.5 A with 0.01 % line regulation and 80 dB ripple rejection

  • Adjustable dual-rail output from ±1.25 V to 30 V
  • Guaranteed 1.5 A continuous current for demanding loads
  • Typical line regulation of 0.01 % keeps voltage stable
  • 80 dB ripple rejection delivers clean DC power
  • Built-in short-circuit, overcurrent and thermal protection

Power Supply Board XR-103

The Vszerda LM337 XR-103 is an adjustable regulated power supply module designed for electronics prototyping and bench testing. It accepts a dual AC input below 28 V via a three-wire connection and delivers a continuously adjustable bipolar DC output. The board integrates short-circuit, overcurrent and thermal protection for safer experimentation.

For builders needing split-rail DC up to 30 V

This module suits hobbyists and engineers who require symmetrical positive and negative rails for op-amp circuits, sensor arrays or audio projects. It is not for applications that demand fixed single-rail voltages, higher current than 1.5 A, or direct mains-voltage connection without an external transformer.

Bipolar output range ±1.25 V to 30 V

The defining specification is the continuously adjustable dual-polarity output span, which sets the usable voltage window for any connected load. Line regulation reaches 0.01 % and load regulation 0.1 %, while ripple rejection measures 80 dB, ensuring stable rails for sensitive analogue stages.

Highlights

  • Adjustable dual-rail output from ±1.25 V to 30 V
  • Guaranteed 1.5 A continuous current for demanding loads
  • Typical line regulation of 0.01 % keeps voltage stable
  • 80 dB ripple rejection delivers clean DC power
  • Built-in short-circuit, overcurrent and thermal protection

Specifications

No published specifications for this item yet.

Questions about this item

Will the LM337 regulator or XR-103 board need any scheduled component replacement?

The board has no user-replaceable parts; the LM337 regulator and XR-103 module are soldered in place and rated for continuous operation within the 1.5A limit.

What stops the output current first when the load is held at maximum for a long period?

The guaranteed 1.5A output current limit is reached before thermal protection activates, so current limiting is the first boundary under sustained full load.

How much heat and fan noise should I expect when the module runs all day at 30V output?

Linear regulation drops the excess voltage as heat; at 30V DC output with 1.5A the dissipation is significant, so a heatsink is required and the board itself is silent.

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