KST S WS, CAT II 4mm Safety Insulated Jumper Plug Hirschmann Test and Measurement KST S WS 4mm insulated jumper plug with shatter-proof insulated sleeve. These CAT II, CAT III 4mm jumper plugs feature spring-loaded plugs and unsprung sockets for onward connection capability and nickel plated brass contacts, the sockets and plugs are connected by a contact bridge. Rated voltage 1000 VAC/DC
Rated Current 32A
CAT II (600 VAC/DC, CAT III)