Forums

faston connector spacing

Started by Winfield Hill March 25, 2020
 Our RIS-796 250-amp LED current pulser has 
 been operated up to 1100A by Rob Legg, and
 is well suited to make shaped current pulses
 up to 750 amps.  E.g., "8.3ms single half
 sine-wave" for "Peak forward surge current"
 diode testing.  Manufacturers like to make
 rating plots for 1 to 100 cycles, etc.  For
 example, a SMD or SMC diode I'm considering
 is rated at 350A for one cycle, dropping to
 60A for 100 cycles.  Fun stuff.

 We've been using 6.3mm (�250� Series) 0.25"
 tab Faston connectors.  These tabs are very
 well suited to fat-wire crimped plugs and
 cable "receptacles".  They mount into 0.200-
 inch 5.08mm-spaced holes on the PCB, and I've
 been spacing adjacent tabs connectors 0.23
 inches apart, to allow for easy handling of
 the huge crimp plug housings.  

 Ideally diode testing would be done with the
 candidate part properly mounted on a PCB, so
 it has the right thermal mass, etc., but I
 haven't found any PCB-mounting Faston plugs.
 Moreover, it's clear that adjacent PCB-mounted
 connectors need perfectly-accurate spacing,
 or they won't mate.  This means forget Faston,
 and use 5.08mm PCB-mounting connectors.  But,
 bottom-line, most RIS-796 applications will
 still need the Faston tabs mounted, but now
 at 0.20-inch rather than 0.23-inch spacing.

 Looking at "yellow" AWG 10-12 crimp terminals,
 purchased at Home Depot, moving the Faston
 tabs 30-mils closer to each other, would only
 leave a roughly 10-mil plug-to-plug gap.  So,
 can you help convince me that's enough?


-- 
 Thanks,
    - Win
onsdag den 25. marts 2020 kl. 09.32.13 UTC+1 skrev Winfield Hill:
> Our RIS-796 250-amp LED current pulser has > been operated up to 1100A by Rob Legg, and > is well suited to make shaped current pulses > up to 750 amps. E.g., "8.3ms single half > sine-wave" for "Peak forward surge current" > diode testing. Manufacturers like to make > rating plots for 1 to 100 cycles, etc. For > example, a SMD or SMC diode I'm considering > is rated at 350A for one cycle, dropping to > 60A for 100 cycles. Fun stuff. > > We've been using 6.3mm (“250” Series) 0.25" > tab Faston connectors. These tabs are very > well suited to fat-wire crimped plugs and > cable "receptacles". They mount into 0.200- > inch 5.08mm-spaced holes on the PCB, and I've > been spacing adjacent tabs connectors 0.23 > inches apart, to allow for easy handling of > the huge crimp plug housings. > > Ideally diode testing would be done with the > candidate part properly mounted on a PCB, so > it has the right thermal mass, etc., but I > haven't found any PCB-mounting Faston plugs.
https://www.te.com/usa-en/product-63969-1.html ?
Lasse Langwadt Christensen wrote...
> > onsdag den 25. marts 2020 kl. 09.32.13 UTC+1 skrev Winfield Hill: >> >> Ideally diode testing would be done with the >> candidate part properly mounted on a PCB, so >> it has the right thermal mass, etc., but I >> haven't found any PCB-mounting Faston plugs. > > https://www.te.com/usa-en/product-63969-1.html
Ah, perfect. Thanks, Lasse! The PCB-mounting receptacles look like they are wide enough to fit even if things are miss-aligned. -- Thanks, - Win