2.8W Laser and 2.5amp Safety Compliant Driver Kit


Our MOST popular kit EVER!  2.8W laser with our 2.5amp driver.

Engrave on wood, leather, acrylics, and many other materials
Cut thin and non dense woods like Balsa, Basswood, and thin plywood!
Cut many types of foam and plastics!

MAKE incredible objects for projects or production.  Your creations are only limited by your imagination!

Over 1,000 kits running all over the world from home shops to high tech production.  We offer excellent service and work with you to make sure your laser is performing at peak performance!

CLICK HERE to order your mounting kit

Choose your power adapter region, North America or International Plugs.

SKU: LD445_2_8WKIT_FDA Category:


Fourth Generation Product – it just keeps getting better!

This go around we have kept all of the features that make this laser kit awesome – precision laser trimmed regulators for constant current to the laser, 0.01 tuning resolution, digital isolation, soft start, esd protection, current limiting, and the list goes on.  But NOW we have more safety in mind as well!  The US Federal Government has a list of things that are required for operating these high power class 4 lasers.  They might seem trivial, but they could save your eyesight!  Here is a run down of the new safety features to protect yourself and others:

  • Key Switch – This key is needed to enable the laser.  When the key switch is turned on, the laser is enabled and the key CANNOT come out.  You can only remove the key when it is disabled.  This feature is good if you have curious children or have your laser in a shared area and want to limit use.  Just take the key out and hide it!
  • Remote Interlocks – This feature allows for addition of switches to your enclosure so when it is open, the laser will automatically turn off.  Also provides for the addition of an E Stop button for the laser, which is always good for if you need to stop the laser super quick!  Add as many switches as you want to make a super safe area for your laser machine so nobody can accidentally look into the laser.
  • Power Fault Protection – This one may seem like it is not needed, but hear us out.  Consider your power goes out in your area where the laser is located.  You were running your program and then everything is dark…  Power doesn’t come back on for awhile… long enough for you to forget that the laser was left ON!  You come back and are checking your laser and boom, the power is back on, right when you are looking straight at it.  Well, don’t worry because the laser will be disabled whenever the power to the driver is lost.  Press the reset button and you are back in action!
  • Emission Indicator –  The small little LED on the front to let you know  your really super bright laser is on…  They require this in case you are using an infrared invisible laser.

What this kit includes:

This kit is a combination of the new 2.8W 445nm 9mm Laser Diode Component and the 2.5 Amp matching safety compliant laser driver kit with a 12V adapter.  We now include a pair of safety goggles with every kit as well!  This has everything you need to get your laser up and running in your product or project.   The kit includes:

Laser Overview

This is the bigger 445nm 9mm laser diode with an added our High Efficiency AR Coated Glass lens.   This laser can run for extended times at 2.2W at 1.5amps!  This laser has a maximum limit of over 3W at 2.5amps and should only be over-driven like this for very short times.   This level of power certainly creates the ability to cut more and do more with your laser.   At the factory setting of 1.5amps @ 2.2W you should get about over 3000 hours of lifetime from the laser.  This laser also has internal ESD device for an extra level of static protection.

This multi transverse mode laser diode component is pressed fit mounted in an aluminum housing and has an aluminum mountable heat-sink.  The laser is set in the heat sink with thermally conductive paste.  The front of the component contains a adjustable glass focusing lens for the laser output.  The laser has an ABSOLUTE MAXIMUM of over 3W at 2.5amps and should only be run at this level for very short times.  Additional cooling techniques would be advisable if you want to run for extended periods at higher powers.

 Absolute Maximum Ratings:

Item Absolute Maximum Ratings Unit
Forward Current (Tc = 25°C) 2.5 A
Absolute max output optical power >2.8 W
Allowable Reverse Current (Tc = 25°C) 85 mA
Operating Case Temperature 50 °C

Electrical / Optical Characteristics:

Item Min Typ. Max Unit
Optical Output Power @1.3 amps 1.6 W
Optical Output Power @1.5 amps 2.2 W
Dominant Wavelength 435 455 nm
Threshold Current 80 220 mA
Operating Voltage 3.7 5.5 V
Focused Spot Size 0.007 0.009 Inches
Beam Divergence Full Angle (1/e^2) // 5 14 25 deg.
Beam Divergence Full Angle (1/e^2) – Perp 30 44 50 deg.

-Above specifications are for reference purposes only and are subject to change.  Figures in specifications may contain measurement errors.

Class 4 Laser Radiation Sticker 2_8w small

Driver Overview

This is the fourth generation of the popular High Current Laser Diode Driver series.  We designed this new generation to follow the federal guidelines for safety compliance for high power Class 4 laser operation.  This includes the use of a key enable switch, safety interlock system, power off reset, and laser LED indicators.  All of these features make for a safer laser operation and will comply with federal laws regulating such operations.

At the heart of the product are laser trimmed parallel regulators to give constant current without the large temperature dissipation of other regulators. Couple this with inherent safety features like soft starting, current isolation, reverse protection, ESD protection, and thermal shutdown control and you have all you need in a small package.

The high power laser diode driver is cost effective and easily integrated into industrial, research, or enthusiast projects and products.  The driver can be operated in CW mode or in Input Control Mode to be interfaced to remote electronics.  This design uses digital isolators for super fast response and input range while protecting the laser from deadly ground loops.   The board has screw terminal connections as well as Molex mini-fit Jr. connectors for easy connections to external equipment for control and the laser diode output.


  • High power current source for driving Laser Diodes and Light Emitting Diodes.
  • Current Range of  2.5 Amps.
  • Current Ranges are adjustable in 500ma increments.
  • Integrated cooling fan
  • Soft start for diode protection.
  • Reverse diode and ESD protection.
  • Thermal Protection and Over Current Protection.
  • Federal Compliant Safety Features
  • Key switch, Remote Interlock, Power Fault Reset
  • Compact Size.
  • CW Mode and Input Control Mode.
  • Digitally isolated control input.
  • Control from CW to 5KHz.
  • Configurable Input signal: Inverting /Non-Inverting.
  • Multiple connector options for both Laser/LED output and control input.
  • LED status lights for input laser enabled and laser on.


Specification HCDBSAFDA2_5AMP
Current Source Range: 0 – 2.5 Amps
Current Limit Jumper Settings: 0.5, 1.0, 1.5, 2.0, 2.5 Amps
Compliance Voltage w/12V adapter: 8 volts
Current Resolution: 0.1%
Current Adjustment: Analog Trim Pot
Current Range Accuracy Always greater than limit, no more than 15%
Laser Diode Protection: Soft Start, Reverse Voltage, Current Limit, Thermal Shutdown
Integrated Safety Features Laser Enable Key Switch, Integrated Laser Interlock, Power off Reset, LED Indicators
AC Adapter Input Voltage: 100 – 240 VAC
Control Signal Digital Isolation Voltage: 4500 Vrms
Minimum Control Signal ”Turn On” Voltage: 2.8 Volts
Control Signal Maximum Voltage: 36 Volts
Control Signal Maximum Current: 50 ma
Control Signal Maximum Frequency: 5KHz
Connectors: Screw Terminal and Molex Mini-Fit Jr™ Connectors
Operating Temperature: 0 to 40 °C
Storage Temperature: -40 to 70 °C
Dimensions: 3.6″ x 2.2″


Remote Reset Switch – In case your driver board is in a hard to reach area.

Remote Reset 800

Add an Emergency Stop Switch to your interlock circuit.  Click Here

Emergency Stop Button Switch 800

Additional information

Weight 1.75 lbs
Dimensions 4 × 3 × 2 in
Power Adapter Region

US (North America), International


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