Contact Resistance - Hitachi PN-150BE Manual

4.6.3. Contact Resistance

Resistance of front contacts should be measured with the armature in its full-stroke
position, and resistance of back contacts should be measured with the armature fully
released. Cleaned contact resistance should not exceed the following values.
Type of Contacts
Silver to Silver-Impregnated Carbon
Silver to Silver
Copyright 2019
PN-150BE Biased High Efficiency Vital Relay
Front Contacts
0.09 Ohms
SM 4551L, Rev. 0 1, March 2019
Back Contacts
0.18 Ohms
------ 0.03 Ohms
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