Series ST Switches for Extreme Environments General Specifications • Switch equivalent to military specifications • Conforms to IP68 of IEC60529 standards • Explosion proof and hermetically sealed, no ingress of air or gases • Operating temperature range –63°C ~ +71°C (–81.4°F ~ +159.8°F) • Available in single or double pole: Single pole up to 10A @ 125V AC - Resistive load; Double pole up to 20A @ 125V AC - Resistive load Lamp Load Part Number Pole & Throw Circuit ST40AM110 SPST ON-OFF ST40DM110 SPDT ON-NONE-ON DC AC 30V 7A 7A Resistive Load DC AC 125V 30V 3A 25A 3A 25A AC 125V 30V 125V 10A 15A 10A 10A 15A 10A ST40EM110 SPDT ON-OFF-ON 7A 3A 25A 10A 15A 10A ST50AM220 DPST ON-OFF 7A 4A 20A 20A 15A 15A ST50DM220 DPDT ON-NONE-ON 7A 4A 20A 20A 15A 15A ST50EM220 DPDT ON-OFF-ON 7A 4A 20A 20A 15A 15A Test Criteria Test Summary Anti-explosion Operable in explosive environment to 12.04kPa maximum Sand dust proof 100 mesh; flux 8.89 ±1.27m/s; density 10.7g/m3; duration 6 hours and 2,500 operations Hermetically sealed toggle Minimum 13mm below water surface, immersion for 5 minutes, operated 5 times during immersion Contact resistance 10 milliohms maximum @ 2 ~ 4V 1A DC Insulating resistance Dielectric strength Terminal strength 100 megohms maximum @ 500V DC Normal pressure 1,000V AC for 1 minute Reduced pressure 8.0kPa AC Screw terminal 133.0N Torque: 0.7Nm for 10 seconds Nominal operating force Mounting torque 113.0N for 60 seconds Nut 2.0Nm Mechanical life 40,000 times: 20,000 times at –63°C; 20,000 times at +71°C Overload Electrical Life 50 operations with 150% of rated current Normal temperature, normal pressure 20,000 operations with rated current High temperature, normal pressure 20,000 operations with rated current @ +71°C Normal temperature, reduced pressure 20,000 operations with rated current, 8.0kPa Temperature rise 50°C maximum Vibration 10 ~ 500Hz with peak-to-peak amplitude of 1.5mm (98m/s2); 3 directions for 3 hours each, 9 hours total Shock 735m/s2; 6ms; 6 directions, 3 times each, 18 times total Thermal shock –55°C (–67°F) ~ +85C (+185°F); 5 cycles Operating temperature range Humidity –63°C (–81.4°F) ~ +71°C (+159.8°F) Temperature humidity cycle 10 cycles polarization 100V DC +35°C (+95°F) brine density 5%; 100mA 6V DC @ 96 hours; 10 operations with resistive load current Brine spray ST series switches are not a standard inventory item. 1 Inductive Load DC www.nkk.com Custom Switch Custom Switch Switch IM IM INRACustom For Extreme Environments Y L L E E MA Series STY Switches for Extreme Environments Y R R For A A IN IN RY Extreme Environments TYPICAL SWITCH DIMENSIONS PR EILMI IN PRR EL P For Extreme Environments PR Single Pole M12 P1 M12 P1 YIN R AIM NL I E M LIR EP R P M3.5x5 M12 P1 Y R A 1 2 Single Pole (30.0)Max 34° M3.5x5 Single Pole (6.0) Dia .236 34° Single Pole (6.0) Dia .236 (18.0)Max .709 Double Pole (18.0)Max (18.0)Max .709 .709 (30.0)Max 1.181 1 2 3 2 34° Keyway (6.0) Dia .236 Keyway (12.0) .472 (17.0) .669 (17.0) (12.0) .472 .669 M12 P1 (17.0) .669 (30.0)Max (30.0)Max 1.181 3 3 Keyway (28.0)Max 1.102 (28.0)Max (12.0) .4721.102 M12 P1 M12 P1 1.181 (28.0)Max 1.102 M3.5x5 M3.5x5 30° Double Pole Double Pole 4 M3.5x5 2 1 5 4 2 (6.0) Dia .236 30° Keyway (34.0)Max 11.339 (6.0) Dia .236 (20.0)Max .787 STANDARD HARDWARE: (20.0)Max Hex Face Nuts - 2 .787 Locking Ring - 1 Lockwasher - 1 Standard Hardware and Panel Cutout for all switches Standard Hardware and Panel Cutout for all switches Standard Hardware Keyway (12.0) .472 (17.0) (6.0).669 Dia .236 (12.0) .472 (17.0) .669 PANEL CUTOUT: (17.0) Maximum Panel.669 Thickness 3.0mm (.118") 5 3 6 3 6 2 5 (34.0)Max 1.339 (32.0)Max 1.260 Keyway 3 (32.0)Max 1.260 (12.0) .472 (32.0)Max 1.260 (12.5) Dia STANDARD HARDWARE, .492 PANEL CUTOUT & THICKNESS STANDARD HARDWARE: PANEL CUTOUT: Maximum Panel Thickness Hex Face Nuts - 2 3.0mm (.118") Locking Ring - 1 (9.0) STANDARD HARDWARE: Lockwasher -1 .354 CUTOUT: PANEL (12.5) Dia Maximum Panel Thickness .492 Hex Face Nuts - 2 3.0mm (.118") (3.0) Dia Locking Ring - 1 .118 Lockwasher - 1 (9.0) .354 and Panel Cutout for all switches (3.0) Dia .118 (12.5) Dia .492 (9.0) .354 (3.0) Dia .118 www.nkkswitches.com 11/10/08ST series switches are not a standard inventory item. 11/10/08 4 (34.0)Max 1.339 30° (20.0)Max .787 2 (30.0)Max 1.181 (30.0)Max 1.181 1 Double Pole 11.181 M3.5x5 www.nkk.com www.nkkswitches.com 7850 East Gelding Drive • Scottsdale, AZ 85260 Phone 480-991-0942 • Fax 480-998-1435 7850 East Gelding Drive • Scottsdale, AZ 85260 Phone 480-991-0942 • Fax 480-998-1435 6