The D4NS-4BF is a 4-pin, double-pole, double-throw miniature relay made by Omron. It is designed for use in industrial and commercial control applications. This relay features a wide voltage range of 24 to 48 VDC, 10,000 switching cycles, a durable construction resistant to shock and vibration, and sealed terminals to prevent entry of dust and moisture. It is an ideal choice for automation systems that require reliable and durable switching capabilities.