Siemens 3RP1525-1BQ3 Timing Relay

Siemens 3RP1525-1BQ3 Timing Relay is a compact SIRIUS electronic on-delay relay designed for DIN-rail mounting in industrial control panels. As part of the 3RP15 family, it provides a precise timing delay before the relay changes state, enabling safe sequencing in applications such as motor start-up, conveyors, and process automation. The device features an LED status indicator and robust screw-terminal connections for reliable field wiring, with a front-rated IP20 enclosure suitable for indoor control cabinets. It supports multiple supply voltages common to the series, including low-voltage DC and wider-range AC options, making it adaptable across different control architectures. The timing function is electronic, offering stable operation across temperature variations and a long service life in demanding environments. The 3RP15 timers are designed to be compact, allowing integration where space is limited while delivering repeatable delay characteristics across several time-range settings. This model is used to coordinate control sequences, protect equipment from inrush, and orchestrate safe shutdown sequences in industrial automation.