The SR4M4021 Power Relay, a high-performance component designed for reliable circuit control in various applications. With a low amperage of 8A and a printed circuit board mount type, this relay is efficient and easy to integrate. Featuring silver tin oxide (AgSnO2) contact material, it ensures durable and stable performance. The 4 poles, including 3 Form A (NO) and 1 Form B (NC) contact arrangement, offer versatile switching options. With a coil resistance of 551Ω and a coil voltage of 21VDC, this relay provides precise operation. Suitable for HVAC systems and other industrial applications, it is RoHS compliant, guaranteeing environmentally friendly usage. Trust in the SR4M4021 for seamless and secure relay functionality.