The DRS-DTH Reed Switch is a large changeover switch with a 39.70mm long x 5.33mm diameter (1.562" x 0.210") glass envelope, capable of high voltage and power switching up to 500Vdc at 2mA or 0.5A at 30W/VA. The DRS-DTH has an insulation resistance of 10^9 ohms minimum and contact resistance less than 125 milli-ohms.