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Old 15th October 2012, 09:23 AM   #1
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Default Parts question

Does anyone see an issue subbing the PMBS3906 and PMBS3904 in the Rockford amps instead of the MMBT3906 and MMBT3904?
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Old 15th October 2012, 09:30 AM   #2
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They appear to be the same basic part.

One problem that I've found with a few of the Philips transistors is that they plastic they use melts easily. For example, you can heat 2 legs and lift them for testing with most SOT-23 transistors but some of the Philips just turn to goo when you try that. They use the same plastic on some of their TO-92 transistors as well.

I don't know why you're interested in using them unless you found them for cheap somewhere. I typically use the MMBTA06/56 as subs for those in Rockford amps.
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Old 15th October 2012, 09:33 AM   #3
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I use both MMBTA56/A06 and MMBT3906/3904 just depends on what I decide to grab at the moment. I can pick up 10,000 of each for around $50 just thought it was a good deal, so would you not recommend getting them?
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Old 15th October 2012, 09:47 AM   #4
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I've never had a problem with philips parts except for what I described. They will probably be OK as long as you know that they're from a reputable distributor. I don't use enough of anything to buy in that quantity. I buy in 500pc quantities (A06/56) and that typically lasts me 3-4 years.
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Old 15th October 2012, 09:50 AM   #5
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Yes I understand what you are saying. I have enough already to last me 10 years probably, I just hate passing up good deals. They are from a reputable distributor which I have purchased many parts from in the past.

I will think on it.
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