Compact Size 24V PWM 435nm 20W Blue Laser Module for Laser Engraving Machine

BU-LASER launches this compact miniaturized 435nm 20W blue laser engraving module, an integrated all-in-one light source optimized for small desktop engravers, portable CNC carving machines, DIY laser equipment and mini industrial marking devices. Adopting high-efficiency single-chip 435nm blue laser diode, mini multi-element collimating lens, built-in 24V PWM constant-current driver and compact low-noise air cooling system, it delivers stable 20W real optical power within an ultra-small housing footprint, solving the space limitation pain point of small-format engraving machines while retaining strong multi-material engraving & cutting performance.

Core Product Advantages

1. Ultra-Compact Mini Size, Easy Embedded Installation

Redesigned integrated internal layout greatly shrinks overall dimensions, far smaller than conventional 20W blue laser modules. It perfectly fits narrow Z-axis lifting frames, portable handheld engraving equipment and mini desktop laser machines with limited internal space. Standard unified M4 threaded mounting flange, compatible with mainstream small engraver brackets without structural modification, plug-and-play assembly.

2. 435nm Short Deep Blue Wavelength, Superior Multi-Material Processing

435nm ±3nm deep blue light owns higher photon energy than standard 450nm blue lasers, featuring dramatically higher absorption rate on non-ferrous metals and non-metals:

Metals: Anodized aluminum, coated stainless steel, brass, copper alloy achieve permanent high-contrast black marking without pre-spray treatment;

Non-metals: Wood, plywood, acrylic, leather, paper, PCB, plastic get clean cutting edges with minimal carbonization, yellowing and heat-affected zone.

Narrow spectral linewidth ≤4nm FWHM eliminates stray light interference, delivering ultra-fine engraving lines and consistent processing texture.

3. Stable 20W CW High Optical Power for Efficient Production

Genuine 20W continuous-wave optical output with 0–20W stepless power adjustment.

Processing capacity reference: Single-pass cutting for 6mm solid wood, 4mm acrylic, full-thickness leather; ultra-fine text & QR code engraving on hardware accessories.

4. Integrated 24V PWM Driver, Wide Compatibility with Engraving Control Systems

Wide DC 24V input (22–26V tolerance), matching power supply architecture of all desktop engravers and DIY CNC controllers.

Supports standard PWM modulation: 0–100% duty cycle,  Seamlessly synchronized with GRBL, Marlin, LightBurn and other mainstream engraving software, realizing real-time power linkage with carving speed without extra external drive boards.

5. Mini Low-Noise Air Cooling, Stable Long-Time Operation

Compact high-density aluminum fin heat sink paired with micro silent cooling fan, lightweight and low vibration. Efficient heat dissipation controls diode temperature steadily under full 20W power, supporting 8+ hours non-stop daily engraving.  No water cooling pipeline required, simplifying machine wiring layout.

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