The RH4B-UD-DC24V is a 4-pole double-throw (4PDT) compact power relay designed for DC switching applications with a 24 VDC coil and integrated protection diode. The relay features a 10 A contact capacity per pole and operates with a coil current of 98 mA at 24 VDC, with a coil resistance of 84.5 O at 20°C. The integrated diode absorbs back-emf generated during coil de-energization, extending the release time slightly while protecting the circuit from voltage spikes. This relay is available in blade terminal and PCB terminal configurations, with compact dimensions (41 mm width, 27.5 mm depth) that save panel space. Common applications include industrial control systems, automation equipment, and DC power distribution circuits where reliable switching and surge protection are required.