DBR72405SU is a UL-approved normally closed high voltage reed relay designed for applications requiring very high isolation voltages. It features rhodium contacts with 5kV isolation across contacts, a 5V DC coil voltage, and maximum switching power of 50W. The relay offers low contact resistance of 50 mO max (15 mO typical), switching current up to 3A, and carry current up to 4A DC or AC peak. With an operating temperature range of -20°C to +70°C and insulation resistance of 10^10 O minimum, this relay is suitable for high reliability applications such as cardiac defibrillators, test equipment, and high voltage power supplies. The "S" suffix indicates PCB mount with stud fixing and 1/4" spade HV connections.