The SY21 Plastic Circular Connector are IP67 connectors, bayonet coupling, they have the same size and same electric spec as SP13/17/21, but IP67, SY21 is our large-size plastic shell, IP67 waterproof connector, the specialty of SY21 connector is bayonet coupling, it is designed for applications that need quick locking and frequent plug on/off mating.
1) Shell diameter (the panel hole cutout diameter): 21mm
2) Number of contacts: 2 -12 gold plated contacts
3) Rated current and V: 30A-5A, 500V-400V.
4) Cable outer diameter acceptance: type I: 4.5-7mm, type II: 7-12mm
5) CE, ROHS approval
Material and spec
PC: Panel connector shell, Insert housing shell.
Nylon66: Locking nut, Back shell, Compressing nut, Retaining nut
Fire resistance: V-0
PPS, max temperature 260 ℃
Brass with gold plating
Solder: SY13, SY17, SY21
Crimp: SY17, SY21
Screw: SY21 (Ø3 mm contact)
Insulation resistance (MΩ)