I have a product that is CE marked. It is designed exclusively for an
OEM to be sold into the European Union. The OEM wishes not to be the
holding company at this point. Since, it is designed for an OEM account,
I cannot use are standard sales channels of reps and distributors to hold
Edward/Doug/et.al.-
Any sources for those special clips? I've seen metal spring clips
also...
And how about sources for the grey insulating sleeving/tubing that slips
over the entire TO-220 package, providing insulation and good thermal
transfer, and allowing use of a metal clip? The sleeving
There used to be a special plastic shoulder washer used in exactly this
application (The washer has a crossection resembling the letter T). This
solved the clearance and creepage problem. It fits inside the hole of the
TO-220.
Hans
Moshe,
The best way that I have seen is to use a thermally conductive isolation
pad between the rear of the transistor and the chassis. The pad should
extend beyond the conductive part of the component so creepage distances
are maintained.
The transistor would be held tight to the chassis by a
Moshe,
I also have used an number of TO-220 transistor packages. In the past to
get the isolation I used thin ceramic substrate. Several things were done
to provide the 1.5 MM required. 1) a shoulder washer was used on the screw,
2) there was a counter-bore in the heat sink to provide a
Somewhat depending on what creepage and clearance you are trying to
acheive I'd have thought it difficult to maintain good thermal
conductivity and meet cc requirements. Better to have an isolated
heatsink for the high voltage parts.
-Original Message-
From:
For EN 60065 or 60950
Covers or access to hazardous voltages must not be accessible without
the use of a tool, so clips etc. are not satisfactory.
A screwdriver constitutes a tool so screws are the simplest fixing.
-Original Message-
From: moshe_valdman_at_isr-rhv...@mail.nsix.co.il
Hello everyone,
To avoid contact with hazardous voltage in some connectors I need to cover them.
I have 2 questions regarding this:
1. Is it OK for the covers to be removed without a tool? (i.e. held not by a
screw but with some kind of reliable clip)
2. What should be marked/written on the
Hello everyone,
The following problem has probably several solutions, some of which I've seen
implemented in power supplies.
PROBLEM:
In many applications the metal part of the TO220 package (that's the square with
metal backing and 3 legs in a row) is (or should be considered) under live
9 matches
Mail list logo