The DAR71210P is a UL-approved, normally open high-voltage reed relay from the DA(UL) series designed for high-reliability applications requiring very high isolation voltages. This relay features a 10kV isolation rating across contacts with a 12V DC coil, achieving low contact resistance through rhodium contact material. The relay operates with a must-operate voltage of 9V DC and must-release voltage of 1.25V DC, with operate and release times of 3.0 ms and 2.0 ms respectively (with diode fitted). It is suitable for demanding applications such as cardiac defibrillators, test equipment, and high-voltage power supplies where excellent isolation and reliability are critical.