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500mW TO38 diode required

Joe99

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Aug 5, 2021
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I bought this unit a while back, for engraving PCB's (isolation routing), and it just died. It lasted about 10 working hours in total, on and off - of course. Paid only £14 a year ago, shipping included, from a popular offshore online market place.

It was described as "500mw 405NM blue purple laser module engraving,with TTL PWM control"
The driver that came with it, supplies a constant 370mA, and is still working.

I am now looking for a TO38 package replacement diode, to replace the dead one, but can only find a 200mW model. (Nichia NDV4542)
Can anybody recommend a more powerful model?

Thank you for any advice.
Joe

driver.jpglaser.jpg
 
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Joe99

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That is the same diode I quoted, (NDV4542) and is actually only 200mW, thanx anyway.
 

WizardG

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Many manufacturers overdrive the diodes to get their 'rated' power. You can get 500mW from that diode if you push it hard enough, but as you found out they won't last.

I think you'd be better off using a different diode if you need a half watt of output.
 

Joe99

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I hoped to re-use the nice housing, the reason for getting another TO38 diode.
I do have some M140's (2W) , will find a proper housing for them instead. 😈
 

kecked

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Wonder if a 7w 445 might be a better choice…..
 




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