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Old 21st Aug 2007, 10:45 pm   #1
MikeBeith
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Default AF127 and AF127N

Looking for some help on the difference between an AF127 and an AF127N transistor. I have looked on the web but could not find a datasheet on either. I am wondering if the N suffix is likely to preclude its use to replace a standard AF117/AF127.

Any help appreciated with info including pin outs.

Thanks, Mike
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Old 22nd Aug 2007, 12:35 am   #2
Darren-UK
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Default Re: AF127 and AF127N

I've just had a quick look around the web and all I can determine is that the N suffix seems to denote a specific manufacturer. Have a look at this German site where it seems any transistor with the N suffix comes from a manufacturer coded 'SI'.

I wouldn't think it's quite that simple though, so I'll see what I can find out later if nobody else offers any further info in the meantime.
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Old 22nd Aug 2007, 8:31 am   #3
'LIVEWIRE?'
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Default Re: AF127 and AF127N

'SI' = Siemens(the manufacturer in question), and, so far as I know, the AF127N should be a suitable substitute for othe AF127 variants, for AF117, and for the earlier OC170.
Connections shouled, however be checked, as I have come accross AF127s with non-standars pin-outs.
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Old 22nd Aug 2007, 9:52 am   #4
Mersey_Swimmer
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Default Re: AF127 and AF127N

I've just checked in my old transistor "Bible" (Towers) and AF127N isn't listed. So I'd go with everyone else and agree it's a standard AF127 with a manufacturer's identifying suffix. Should there have been any differences I'd assume Towers would list as such.

Pete
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Old 22nd Aug 2007, 11:02 am   #5
studiot
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Default Re: AF127 and AF127N

My Towers lists an AF117 and an AF117N, the same transistor in a different package.

Only one AF 127 is listed however.

Older versions of Ball have the AF117 at 75 mW, the AF127 at 67 mW, Towers has 75 mW for both

Vcb= -20 (Ball, Mullard) -32 (Towers)
Vce= -15
Icmax= 10mA (both)

2n equivalents

AF117 = 2N990
AF127= 2N990
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Old 24th Aug 2007, 9:07 am   #6
MikeBeith
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Default Re: AF127 and AF127N

Thanks to all who replied - very much appreciated. I think I'll use the AF127N and see how it goes. I'll report back if any problems noted.

Thanks, Mike
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Old 24th Aug 2007, 11:11 am   #7
jim_jobe
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Default Re: AF127 and AF127N

N was often used as a suffix for military standard transistors,
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