DPDT switching with a 10 A contact ceiling
The 1SVR405621R2100: The 10 A contact rating at 250 V defines the resistive load ceiling for the DPDT output. For inductive loads like small contactors or solenoid valves, derate to 50-70% of this figure to stay within the relay's switching life. The 8-pin octal base follows the standard layout for socket-mounted relays — pin 1 and 4 are the coil, pins 5-8 and 2-3 are the two form-C contact sets. No wiring surprises if you're replacing an existing octal relay.
Socket mount with LED — panel integration note
Socket mounting means the relay body snaps into a separate base (not included). The LED across the coil terminals gives a quick visual coil-energised check during panel commissioning — saves a meter probe when tracing a 120V AC control loop. The CR-U series positions this as an interface relay between a PLC digital output and a higher-current field device. The 120V AC coil isolates the 24V DC control side from the 250V AC switched side.
Current lifecycle — sourcing for BOM freeze
The 8-pin octal form factor is a de facto standard across multiple manufacturers. If a BOM freeze requires a second source, any DPDT 120V AC octal relay with a 10 A contact rating is a functional match — but the CR-U series LED and ABB traceability are the differentiators here.