0.5W 405nm Laser and 2.5amp Safety Compliant Driver Kit


This is our 405nm laser kit offering. The spot size is very small (0.003″ or 0.075mm), allowing for precision cuts and engravings or for use in SLS printing.  The laser comes with our 2.5 safety compliant driver kit.  The maximum output power and current levels have decreased from the past offerings due to diode specifications.


-Smallest spot size available
-Cut and engrave fine detail

CLICK HERE to order your mounting kit


SKU: LD405_1WKIT_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 500mW 405nm 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 kit includes everything you need to get your laser up and running in your product or project.    The kit includes:


Laser Specifications:

This 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 high efficiency glass focusing lens for the laser output.   The laser is set to 0.2 amps, which will provide 300mW of optical power and will provide for a longer lifetime on the laser.  We advise to run the laser at or under 0.3amps, providing about 400mW to 500W of maximum optical power.  While the mounting case provides heat sinking capability for the laser diode, it is up to the consumer to make sure the laser is operating effectively within these limits.

Absolute Maximum Ratings:

Item Absolute Maximum Ratings Unit
Forward Current (Tc = 25°C) 300 mA
Absolute max output optical power >0.5 W
Allowable Reverse Current (Tc = 25°C) 85 mA
Operating Case Temperature 50 °C

Electrical / Optical Characteristics

Item Min Typ. Max Unit
Typical Optical Output Power 0.40  .45 W
Typical Operating Current 0.2 0.25 A
Dominant Wavelength 405  405 405 nm
Threshold Current 80 220 mA
Operating Voltage 4 6.6 V
Focused Spot Size 3 4 Mil
Beam Divergence Full Anlge (1/e^2) // 5 14 25 deg.
Beam Divergence Full Anlge (1/e^2) – Perp 30 44 50 deg.

Note: Beam is a round Gaussian profile.

Dimensions and mounting hole locations:

J Tech Photonics Laser Diode Component and Mount dimensions


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

Mounting and Board Outline Dimensions:

J Tech Photonics 1 – 2.5 amp Board Outline

For more information, check out the:

Laser Driver FAQ 

Laser Driver Specifications

 Purchase Safety Goggles!  Click Here!

Additional information

Weight 1.5 lbs
Dimensions 4 × 3 × 2 in
Power Adapter Region

U.S. (North America), International Plugs


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