standard circular connector, 1-2823445-7, TE Connectivity
Product Type: Connector Kit, Connector System: Cable-to-Cable, Sealable: Yes, Connector & Contact Terminates To: Wire & Cable, Circular Connector Type: Plug, Number of Positions: 4, Contacts Preloaded: No, Operating Voltage: 50 VDC, Weight: 25 g, Shell Plating Material: Nickel, Shell Base Material: Brass, Circular Connector Insulation Material Type: Low Fire Hazard Thermoplastic, Hermetically Sealed: Yes, Contact Current Rating (Max): 4 A, Circular Connector Contact Type: Pin, Connector Mounting Type: Cable Mount (Free-Hanging), Polarization Code: D, Mating Alignment Type: Keyed, Mating Retention: With, Accepts Wire Insulation Diameter Range: 8.2 mm, Wire Size: 22 AWG, IP Dust Sealing Level: 6, Operating Temperature Range: -40 – 70 °C, Durability Rating: 250 Cycles, Circuit Application: Signal, Shielded: Yes, UL Flammability Rating: UL 94V-0, Packaging Quantity: 1, Field Serviceable: Yes