Search FAQs

What is the replacement for overload 31161-184-50? Will the 9065SF520 work in it's place ? What overload will work ?

Issue:
What is the replacement for the overload block , 31161-184-50, for Nema size 5 starter ?

Product Line:
NEMA and Definite Purpose Contactors and Starters

Environment:
Type S Contactors and Starters

Cause:
Replacement

Resolution:
The 31161-184-50 part number only identifies a solid state overload relay, and does NOT include the wiring harness, which is also required for this overload block.
The solid state overload relay is used on a Class 8536 Type SG (Size 5) Series B starter.
When replacing a solid state overload relay for the above mentioned starter, order a Class 9065 Type ST520 overload Block. This part number includes the solid state overload relay (90-270A range, Class 10/20 selectable trip time) and the wiring harness. The wiring harness consists of 4 passes of wire looped thru each current transformer hole which are neatly dressed with plastic wire ties.

Note:
Part number 31161-184-50 does NOT include the current transformer, wiring harness or terminal block assemblies.
Class 9065 Type ST520 does NOT include the current transformer or terminal block assemblies.

Part Status: Part number 31161-184-50 is a restricted part number - order Class 9065 Type ST520 for overload and harness

The 9065SF5290 overload block is for Series A Nema sz 5 starters with individually mounted overload blocks, which takes the DD heaters .