Thermal Current Rating (100%): 300 Ampere Intermittent Current Ratings: 30% - 550 Ampere 60% - 400 Ampere 40% - 480 Ampere 70% - 360 Ampere 50% - 450 Ampere Typical Inductive Fault Currents that can be ruptured (5ms time Constant): SD300 1000 Amperes at 48V D.C. SD300B 1000 Amperes at 80V D.C. Maximum Recommended Contact Voltages: SD300 48V D.C. SD300B 96V D.C. Typical Voltage Drop across New Contacts per 100 Ampere: 30mV Mechanical Life: Manually Operated > 10,000 Electrically Operated > 3,000,000 Coil Power Dissipation: Intermittently Rated Types: 30 - 40 Watts Continuously Rated Types: 10 - 15 Watts Maximum Pull-in Voltage (Coil at 20 > o C): Intermittently Rated Types: 60%V Continuously Rated Types: 66%V Typical Drop-out Voltage (Coil at 20 > o C): 10-25% CONTACT PERFORMANCE Dimensions in mm Typical Pull-in time (contacts to close): 30ms Typical Drop-out time (contacts to Open): Without Suppression: 8ms With Diode Suppression: 60ms With Diode and Resistor (depending on value): 25ms Typical Contact Bounce Period: 3ms Auxiliary Contact Thermal Current Rating: Auxiliary Contact Switching Capacities (Resistive 5 Ampere Load): 5A at 24V D.C. 2A at 48V D.C. 0.5A at 240V D.C. > Albright is registered under BS EN ISO 14001חEnvironmental Management System. Should you require information on the disposal of our products, please contact the Health, Safety & Environmental Manager of your Local Supplier for Disposal Guidance Note.