3 buttons with spring return 0-1-2 EL1-B339 1NO 0-1-2 Elmark Features Model: EL1-B  Protection degree: IP44 Color: Green / Red Socket type: 2NO + 1NC Number of keys:  3 Overall size (mm)  L: 134 / H: 68 / W: 50 Brand:  ELMARK  EAN code: 3800131101457 Vendor code: 401339 Insulation voltage: 660V; 50 / 60Hz Surge wear resistance: 6000V  Rated current: 6А(230V АС); 0,3А (230 V CC) IP code: IP44 Short-circuit protection: 10А gG circuit breaker out of circuit Mechanical wear resistance: 1x106 switching cycles Operating temperature: from -20° C to 70°­ C Humidity: 35-85% RH Pair of cables connection: 0.15 Nm Conductor cross section: 1х0,5; 1х0.75; 1х1; 1х1.5; 1х2.5mm2 Mounting: - On a flat metal or plastic surface with thickness: max 4m Aperture size:  Ø22.5mm Standards: EN60947-1;EN60947-5-1