The LM2596 4.5-40V 3A buck module with terminal block is a highly efficient, step-down DC-DC voltage regulator engineered to convert higher input voltages into stable, lower output voltages for power-sensitive electronics. Operating across a wide input range of 4.5V to 40V, it utilizes a high-precision multi-turn potentiometer to deliver adjustable outputs from 1.25V to 37V at continuous currents up to 2A (or 3A with enhanced passive cooling). This upgraded variant features heavy-duty screw terminal blocks on both the input and output lines, completely eliminating the need for permanent soldering. Built with integrated over-temperature cutoff, short-circuit protection, and an efficient 150kHz switching frequency, it serves as a dependable, zero-fuss power step-down hub for robotics, microcontrollers, and DIY automotive electronics.
Overview:
The LM2596 4.5-40V 3A buck module with terminal block offers an accessible and highly versatile power regulation solution for makers, hobbyists, and rapid prototyping applications. Traditional linear regulators dump excess voltage as heat, causing severe energy loss and high thermal stress in tight enclosures; this switching buck module operates at up to 92% efficiency, minimizing thermal output. The on-board multi-turn trimmer potentiometer allows for fine-tuned calibration, making it easy to drop 12V or 24V industrial rails down to 5V for Arduino/Raspberry Pi or 3.3V for ESP32 systems. Outfitted with rugged screw terminal blocks alongside standard solder pads, it supports quick, secure temporary or permanent wire connections. Whether you are running a battery-powered field device, upgrading custom vehicular accessories, or regulating solar charger arrays, this compact regulator ensures stable, ripple-controlled power delivery.
Features:
- Wide Variable Input Range: Accepts any DC input from 4.5V up to 40V, allowing seamless deployment with regular battery packs, wall adapters, or industrial rails.
- Integrated Screw Terminal Blocks: Upgraded input and output terminal connections allow rapid, secure wire mounting without requiring any soldering.
- High Switching Efficiency: Operates as a non-isolated buck regulator with up to 92% efficiency, extending battery runtime and reducing thermal strain.
- Precision Adjustable Output: Multi-turn trimmer potentiometer ensures accurate, high-resolution output calibration down to a 1.25V baseline.
- Robust Current Delivery: Supplies a continuous 2A current output comfortably, with 3A peak headroom available when paired with an external heatsink.
- Built-In Thermal Cutoff Protection: Safety-engineered circuit actively shuts down output loops if the internal operating threshold exceeds safety limits.
- 150kHz Fixed Frequency: Internal switching matrix optimizes power delivery while keeping output ripple voltages low for delicate microcontrollers.
- Dual-Purpose Solder Pads: Preserves standard through-hole side solder pads behind the terminal block, allowing for custom header pin installations.
Specification:
- Module Type: Non-isolated Step-Down Switching Regulator (Buck Converter)
- Core Control IC: Texas Instruments / Landmark LM2596S
- Input Voltage Range: 4.5V to 40V DC (Input voltage must be at least 1.5V higher than output)
- Adjustable Output Range: 1.25V to 37V DC
- Rated Output Current: 2.0A Continuous (Up to 3.0A Max with attached heatsink or active cooling)
- Maximum Conversion Efficiency: 92%
- Internal Switching Frequency: 150 kHz
- Output Ripple Metric: < 30mV
- Load Regulation / Voltage Regulation: ± 0.5% / ± 2.5%
- Connection Termination Style: 2-Pin Screw Terminal Blocks & Through-Hole Solder Pads
- Dimensions Profile: Approximately 43mm × 21mm × 14mm
- Net Component Weight: ~12.0 g
High-Efficiency Solderless Voltage Step-Down
Take full control of your power rails without cluttering your workspace or layout packaging. By replacing delicate solder pins with heavy-duty screw terminal blocks, this compact buck module lets you splice, loop, and re-configure your power delivery wires on the fly using a standard screwdriver, speeding up your rapid prototyping assembly chains.
Optimized for Multi-Voltage Project Development
— Engineering focused on cross-platform versatility. The wide input range lets you tap high-voltage power sources—such as 12V lead-acid batteries, 24V control panels, or 4S Lipos—and regulate them cleanly down to safe 5V or 3.3V digital levels, protecting your sensitive logic chips from over-voltage failures.
Rugged Construction Tailored for Continuous Duty
- Reliable power regulation that is built to last. Combining a high-frequency switching frequency layout with built-in current limiting, short-circuit recovery, and automatic thermal shutdown safeties, this LM2596 board maintains smooth power lines under prolonged operational stresses.
Package includes:
- 1 x LM2596 4.5-40V 3A buck module with terminal block
