The DAR72405U is a UL-approved, normally open high-voltage reed relay from the DA(UL) series designed for high-reliability applications requiring high isolation voltages. This relay features a 5kV isolation voltage across contacts with a 24V DC coil, utilizing a high vacuum reed switch with rhodium contact material for low contact resistance. The relay operates with a must-operate voltage of 20V DC and must-release voltage of 4V DC, with operate and release times of 3.0 ms and 2.0 ms respectively (with diode fitted). It supports a maximum switching power of 50W, maximum switching voltage of 1000V DC/AC peak, and maximum switching current of 3A, with a maximum carry current of 4A. The DAR72405U is suitable for applications such as cardiac defibrillators, test equipment, and high-voltage power supplies where high isolation and reliability are critical.