materials and finish:

1)insulator:pbt thermoplastic,30% glass filled,ul 94v-0 rated.

2)contact material:brass

3)contact finish:selective gold finished 

4)shell:nickel (or tin,zinc,gold)plated

specification:

1)rated load:0.5a 30v dc

2)contact resistance:<=0.03ω

3)insulation resistance:>=100mω

4)withstand voltage:500v av/min

5)insertion and extraction force:3 - 20n

6)life:5000 times