M12 B-Coded 2-Position Plug for Sensor and Actuator Networks
The TE Connectivity T4133412021-000 is an M12 circular plug with 2 female socket contacts, B-coded orientation, terminated via solder cup. It's designed for panel-mount bulkhead applications with a rear-side nut, and carries an IP67 rating when mated — dust-tight and protected against temporary water immersion. The coding prevents cross-mating with A-coded (sensor/actuator) or D-coded (Ethernet) M12 connectors, so it's specific to B-coded fieldbus and I/O block networks.
The gold finish handles the repeated mate cycles typical in field-serviceable connections — sensor swaps, line reconfigurations — without the oxide buildup that tin would develop in the same duty.
Construction and Sealing
Metal shell (copper alloy with nickel finish) and a polyamide (PA66) insert rated UL94 V-0. The threaded fastening type with the bulkhead rear-side nut mounts through a panel cutout; the O-ring seal at the mating face delivers the IP67 rating. The solder cup termination accepts the stripped conductor directly — no crimp tool needed, but the wire must be tinned or ferruled for a reliable joint.
Mating and Pinout
This plug (female sockets) mates with a B-coded M12 male pin receptacle. The 2-position M12-2 shell size carries two contacts; pin 1 is typically power/V+ and pin 3 is ground in the B-coded standard, but always verify against the device wiring diagram. The B-coding keyway ensures it only mates with a B-coded counterpart — no accidental cross-mate with an A-coded sensor connector.