Hermetically Sealed Relay MY4H Hermetically Sealed Relay Ideal for Hazardous Locations Class 1 Division 2 approved. Fully hermetically sealed for hazardous locations. Cadmium-free contacts for environment-friendly use. Models with bifurcated contact also available. Conforms to UL508 and CSA 22.2. Model Number Structure Model Number Legend MY- - - 12 3 45 1. Number of Poles 3. Enclosure ratings 4: 4 poles H: Hermetically sealed 2. Contact 4. Approval Blank: Single US: Class 1 Division 2 approval Z: Bifurcated 5. Rated voltage 12 VDC, 24 VDC, 24 VAC, 110/120 VAC Ordering Information List of Models Type Contact form Plug-in socket/solder terminals Hermetically sealed 4PDT MY4H-US 4PDT (bifurcated) MY4ZH-US Hermetically Sealed Relay MY4H 1Specifications Ratings Coil Rated voltage (V) Rated current (mA) Coil resistance Must operate Must release Max. voltage Power ( ) voltage voltage consumption 50 Hz 60 Hz DC 12 75 160 80% max. 10% min. 110% 900 mW 24 36.9 650 AC 110/120 9.9/10.8 8.4/9.2 4,430 30% min. 0.9-1.1 VA (60 Hz) 24 53.8 46 180 Contact Ratings Contact material Ag alloy Rated load Resistive 110 VAC, 3 A p.f.=1 24 VDC, 3 A Inductive 110 VAC, 8 A p.f.=0.4 24 VDC, 1.5 A L/R7 ms Rated carry current 3 A Max. switching voltage 125 VAC, 125 VDC Max. switching current 3 A Max. switching power 330 VA 72 W Characteristics Contact resistance 50 m max. Operate time 20 ms max. Release time 20 ms max. Max. operating Mechanical: 18,000 operations/hr frequency Electrical: 1,800 operations/hr (under rated load) Insulation resistance 100 M min. (at 500 VDC) Dielectric strength 1,000 VAC, 1 min between coil and contacts 1,000 VAC, 1 min between contacts of different polarity 700 VAC, 1 min between contacts of same polarity Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) Malfunction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude) 2 Shock resistance Destruction: 1,000 m/s Malfunction: 2 When energized: 200 m/s 2 When not energized: 200 m/s Endurance Mechanical: Single contact: 50,000,000 operations Bifurcated contact: 5,000,000 operations Electrical: 100,000 operations. (Single contact) 50,000 operations. (Bifurcated contact) Ambient temperature Operating: 25 to 60C Ambient humidity Operating: 5% to 85% Weight Approx. 50 g 2 Hermetically Sealed Relay MY4H