Publication 700-AT001A-EN-E June 2002
4-10
Q & A
Bleeder Resistor Values
How Much Thermal
Resistance Is Required in
the Heat Sink? What Is the
Thermal Resistance of the
SSR?
Thermal Resistance of Heat Sinks
Note: Values indicate the degree of resistance to heat. The smaller the value is, the better the heat conductivity will
be. It is normally expressed using °C/W units, i.e. the temperature rise per watt.
Thermal Resistance (Rth) of SSRs (with Junctions
➊
On the Back)
➊
“Junction” refers to the PN junction of the semiconductor element and is used as a representative point on the
element to express temperature. Refer to pub. 700-SG003B-EN-P for further details.
Can A Panel Frame Be Used
in Place of Heat Sink?
Yes, but steel plates used for standard panels have lower heat
conductivity than aluminum plates and thus is not suitable for
high-current applications. If the steel plate is used in place of a heat
sink, check that the continuous current flow is a maximum of 10 A.
(For details, refer to pub. 700-SG003B-EN-P.)
9$&
«N
Ω
:
9$&
«N
Ω
:
&DW1R
7KHUPDO5HVLVWDQFH
6
&:
6
&:
6
&:
&DW1R
7KHUPDO5HVLVWDQFH
6+*B
&:
6+*B
&:
6+*B
&:
6++
&:
6+*B
&:
6(B
&:
6(B
&:
6(B
&:
