The DAR72405F-HR is a high-voltage reed relay designed for applications requiring very high isolation voltages and low leakage current. Based on the part number designation, this relay features 5kV isolation between contacts with a 24V DC coil voltage and flying lead connections for high-voltage applications. The relay incorporates rhodium contact material for low contact resistance and achieves a minimum insulation resistance of 1×10¹4 Ohms, making it ideal for sensitive test and measurement circuits. Key electrical characteristics include a maximum switching voltage of 1000V DC or AC peak, a maximum switching current of 3A DC or AC peak, and a maximum carry current of 4A. The relay operates over a temperature range of -20°C to +70°C and is rated for 106 cycles of dry switching operation. These specifications make the DAR72405F-HR particularly suitable for cardiac defibrillators, high-voltage power supplies, and precision test equipment where high reliability and minimal signal degradation are critical.