Souriau Sunbank by Eaton, SMS Female Connector Housing, 4 Way, 1 Row

SMS Series flame retardant quick mating panel mount receptacle housings with a compact design that snap and lock into panel cut-outs enabling quick assembly and installation without the need for any additional hardware. These SMS series flame retardant quick mating panel mount receptacle housings have polyamide PA 6 UL94-V0 housings which are fire and smoke resistant for railway indoor applications and are compliant to railway standards I3/F2 in accordance with NFF16101 & NFF16102 (fire and smoke standards). Additional features of these SMS series quick mating panel mount receptacle housings include positive housing retention latches and positive polarization keys to prevent mismating.
Available from 4 position to 36 position, these SMS series quick mating panel mount connectors use size 16 TRIM TRIO 1.6mm diameter snap-lock pin and socket contacts which need to be purchased separately (see stock number 687-6364 typically)
For mating connectors see SMS series flame retardant quick mating cable mount plug housings

I3F2/I2F3 according to the NFF16101 & NFF16102 (fire and fume standard for the French rail market)
HL3/R23 following EN45545 (2009)

Souriau SMS Series Quick Mating Wire to Board Connectors