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Ten small green circuit boards with adjustable voltage regulators

Vszerda

Vszerda LM337 XR-103 DC Adjustable Power Supply Module 10Pcs

SKU CH-4B1K-TB07C

Pack of ten LM337 adjustable regulator modules delivering ±1.25 V to 30 V at 1.5 A with short-circuit and thermal protection

  • ±1.25–30 V adjustable output for flexible projects
  • 5 A guaranteed current drives demanding loads
  • 01 % line regulation keeps voltage steady
  • 80 dB ripple rejection delivers clean power
  • circuit, overcurrent and thermal protection safeguards circuits

LM337 Adjustable Power Module Pack

This pack contains ten LM337 XR-103 modules that provide a positive and negative regulated supply for electronics prototyping. Each board accepts a dual AC input up to 28 V and delivers a continuously adjustable ±DC 1.25 V to 30 V output. The modules are aimed at hobbyists, students and engineers building lab bench supplies or embedded power stages.

Linear Regulation With Protection Features

The boards use linear regulation achieving a typical line regulation of 0.01 % and load regulation of 0.1 % with an 80 dB ripple rejection ratio. Built-in short-circuit, overcurrent and overheating protection safeguards both the module and the load during development. The three-wire AC input simplifies transformer wiring for dual-rail configurations on a breadboard or perfboard.

Replaces Fixed-Voltage Regulators

These modules replace fixed-voltage regulators and hand-wired LM337 circuits when a project needs symmetrical rails down to 1.2 V at up to 1.5 A. The jump is worth it for audio preamps, sensor arrays or op-amp circuits that demand low noise and precise trimming without designing a custom PCB. Builders who need higher current or switching efficiency should look elsewhere.

Highlights

  • ±1.25–30 V adjustable output for flexible projects
  • 5 A guaranteed current drives demanding loads
  • 01 % line regulation keeps voltage steady
  • 80 dB ripple rejection delivers clean power
  • circuit, overcurrent and thermal protection safeguards circuits

Specifications

No published specifications for this item yet.

Questions about this item

What input voltage does the XR-103 module accept from a transformer?

The board takes a dual AC input below 28 V from a three-wire centre-tapped secondary.

What mounting holes or spacing does the PCB use?

The bare boards have standard through-hole pads; drill to suit your enclosure and use stand-offs to keep the LM337 clear of metal.

How do I set the ±1.25 V to 30 V output without damaging the regulator?

Power the module, then adjust each trimmer slowly with a multimeter on the output; the built-in short-circuit and thermal protection guards against mistakes.

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