ABB – CT-ARS.21S (1SVR730120R3300) – Electronic Off-Delay Timer Relay

The ABB CT‑ARS.S is a single-function electronic off-delay (delay-on-break) timer from ABB’s CT-S series. It operates over a wide voltage range of – VAC/DC, offers ten timing ranges from . s to  h, and provides  changeover (SPDT) relay outputs rated at  A @  VAC. Ideal for industrial control panels requiring delayed shutdown sequences.

• Model / P/N: CT‑ARS.S / SVRR  

• Function: Off‑delay timer (delay starts after control voltage is removed)

• Control Voltage: – V AC or DC  

• Time Ranges: Selectable steps from . s to  h  

• Outputs:  × SPDT ( CO each);  A resistive @  VAC ( A inductive)  

• Indicators: LEDs indicate “U/T” (power/timing) and “R” (relay status)  

• Connections: Screw terminals with double-chamber cage clamp (UL/CSA rated)  

• Dimensions: . × . × . mm (W×H×D); . kg net  

• Certifications: CE, UL , CSA C. No., GL, GOST, CCC, RoHS  

• Durability: , electrical cycles; million mechanical cycles