The dv/dt rating on the MOC 305x series is based on a static test done that
maxes out at 400V.

cl

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Sean H. Breheny
> Sent: Wednesday, December 19, 2001 10:57 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: Triac Driver for 115/220VAC ?
>
>
> Hi Chris,
>
> I am just watching this discussion from the sidelines, but
> what do you mean
> by dv/dt rating is 400V? dv/dt should have units of volts per second,
> shouldn't it?
>
> Sean
>
> At 10:21 PM 12/19/01 -0500, you wrote:
> >Double that on the 3051. 600 V Off state voltage - but the
> dv/dt is rated at
> >400V. Fairchild recommends using them up to 240V, but
> applying a 3:1 rating
> >rule of thumb, I use them up to 200V at 50 or 60 Hz, anxiety
> grows at 240.
> >
> >Chris
>
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