Listing
is for a single 5.6mm 2W M-Type M140 445nm diode.
These are the brand new M140 diodes from the Japan Manufactured M series projectors which are currently the only source for new M140 diodes.
There a lot of M140 diodes being pulled and offered for sale from used and end of life projectors being dumped on the market right now from educational and corporate institutions that are putting out to pasture older machines. Some properly being sold as used diodes but some are listing them as new. It is not a bad thing that used diode are flooding the market and can be a good low cost option for some accepting that a portion to most of the diodes life has been used already but they should be aware of that and not under the impression it is a new diode. If the listing does not state the projector the diodes were pulled from is Japan (not the diode all are made in Japan but used to be shipped to China for assembly in the projectors which is now done all in Japan) and/or does not come with the long red spacer it is a near certainty it was pulled from a used or EOL unit.
The M-Type M140's average about 2.2W @ 1.8A using a G-1/2 lens. The low is about 1.9W and some coming in as high as 2.5W.
Don't attempt to connect the diode directly to a fixed voltage source like a battery. The diode requires a proper laser driver to operate. I offer a fixed X-Drive laser driver set to 1.8A for this diode. You can find it here.
I also have options for this diode in modules with the driver installed see these
If your application is for CNC Engraving check out my CNC page with lots of links to tutorials and recommend parts, software and modulating drivers suitable for CNC.
There are many other proper laser drivers but be careful a lot of sellers here are offering LED drivers as a laser driver which can damage or cause shortened life to the laser diode. LED drivers are not laser drivers. LED's are tough as nails but laser diodes are much more sensitive and need extra features like soft start, overshoot protection and a very low noise output that are standard on laser drivers but not included on LED drivers to save cost since they are not necessary when driving a LED. I have seen a a few tutorials for building a "cheap laser" with this LED driver but it is a bad idea as I see it causing a lot of diode deaths and any build using it will have reduced life or even risk immediate damage to the laser diode. Also
LED Driver Scope Test on it. Please do your homework or shoot me a message if confused by the many offerings of "cheap
drivers" as risking an expensive diode to save on a bargain driver is just not worth it. If you do use a LED driver you do so at your own risk.
There are a lot of used diodes out there being sold as new. Here is a quick reference to help you determine what you are getting. The spacer on the diode is the most identifying feature to distinguish the production range for the diode. There have been three spacers that have been used on the M140. First was the short orange spacer. These were used from 2010-2012 for about a year and a half before being phased out. If you receive a short orange spacer there is near zero chance the diode is not pulled from a used or end of life machine with unknown mileage already on the diode. Second is the long orange spacer. These were in blocks from 2012 to the beginning of 2015 when production in China was ceased and moved to Japan. It is possible that you could see a diode pulled from a new projector with this spacer but it is getting very rare to find new stock of the China manufactured M projectors someone has been sitting on for over a year now. The current projector is manufactured in Japan and has a red spacer that is plastic very hard compared to the soft orange rubber spacers from the ones assembled in China. Your diode if purchased as new it should have this spacer. The picture does not show it as well as I would like but in person you can pretty easily pick them out by eye.
I suggest a max of 1.8A on the M-Type with appropriate heatsinking.
Here are some pictures of the guts of A vs M.
The M on the right has a larger die and the base is larger than the A on the left.
The A-Type has only three wires to carry the current.
Now here is how to tell if you have a higher power M-Type M140 or a the lower power A-Type M140 or older only available in used A140 diodes.
On the M-Type there is a circle above the bar code. This is on the back of the diode right next to the pins. The A-Type does not have the Circle.
This diode is a never used diode that is extracted from a brand new Japan manufactured out of the box DLP projector. Only running time would be whatever quality control testing was done @ the manufacturer and myself running them briefly to make sure they all are in good working order before being sold. On these diodes the case pin is cut short when it was installed in the DLP projector but is still more than long enough to still use and I do quite regularly, there is a pink spacer on the back that you will remove to reveal the case pin, there may be some thermal grease still on the underside of the diode and there will be some solder residue left on the pins.
Here is the Pinout for the diode
If you are looking for a host here are some of the more popular host/heatsink kits that will work with these diodes and if you want something that is not listed in those links that I show in my tutorials below shoot me a message and I can point you in the right direction for them.;)
2W M140 445nm Laser Diode
Here is a quick power test on the M140 using a G-2 glass lens.
Here is one of my favorite hosts. The Sirius 1-C
Here is a list of tutorials I have made and experiments that can help give you ideas for your next project.
Shipping is Free in the US
International
First Class mail "Not Tracked" Delivery estimate is 10-30 business days most falling around 15.
or
Express 5-7 day Tracked with Delivery Confirmation.(Recommended)
International
First Class mail "Not Tracked" Delivery estimate is 10-30 business days most falling around 15.
or
Express 5-7 day Tracked with Delivery Confirmation.(Recommended)