The Siemens 3RA2815-1FW10 Solid-State Time Delayed Auxiliary Switch is a reliable timing accessory designed to enhance control functionality in industrial systems. It features an OFF-delay (delay on release) function, allowing circuits to remain active for a set time after the control signal is removed.

This unit operates without an external control signal and includes 1 Normally Open (1NO) and 1 Normally Closed (1NC) relay contact, providing flexible switching options. It offers a wide adjustable time range from 0.05 to 100 seconds, making it suitable for various timing applications.

Compatible with a broad supply voltage range of 24–240 V AC/DC (50/60 Hz), this solid-state module ensures stable performance, long service life, and high reliability without mechanical wear.