Product Description

Siemens 3RP1531-1AP308K SIRIUS Electronic Off-Delay Timer Relay – 230V AC, 1CO

The Siemens 3RP1531-1AP308K is a high-precision SIRIUS 3RP electronic off-delay timer relay engineered for accurate, time-delayed switching in industrial automation and control circuits. Featuring a 1 Changeover (1CO / SPDT) contact and operating on a 230V AC (50/60 Hz) supply, this compact relay maintains output activation for a pre-set duration after the control signal is removed. It is the ideal solution for controlled shutdown sequences, fan run-on systems, safety interlocks, and automated process control.

Key Features & Technical Details

• Off-Delay Functionality: Keeps the output switch engaged for a selectable duration after the supply voltage or trigger signal is cut off.

• 1CO / SPDT Contact Output: Single pole double throw contact configuration allows flexible control of load circuits and status signaling.

• 230V AC Supply Voltage (50/60 Hz): Designed for standard AC control circuits and direct integration into industrial panels.

• High-Precision Timing Adjustment: Easy-to-set dial enables reliable repeat accuracy and precise timing control.

• Compact DIN-Rail Mountable Design: Saves space inside control cabinets, machine panels, and Motor Control Centers (MCCs).

• Screw Terminal Connections: Provides vibration-proof, highly secure wiring for fast installation and low maintenance.

• Industrial Durability: Built to Siemens SIRIUS standards for high electrical/mechanical service life and reliable operation in harsh environments.

Ideal Applications

• Controlled Machine Shutdown & Emergency Exit Sequences

• Industrial Ventilation Systems & HVAC Fan Overrun Timers

• Conveyor Belt Clearing & Material Handling Delay Systems

• Lighting Control & Auxiliary Power Overrun Circuits

• Packaging Machinery, Machine Tools & PLC Systems

❓ Frequently Asked Questions (FAQs)

Q1: What is the main function of the Siemens 3RP1531-1AP308K timer relay?

A: It functions as an Off-Delay Timer Relay. When the input control voltage is disconnected, the relay keeps its output contact energized for a pre-set delay period before turning off.

Q2: What supply voltage does this timer relay require?

A: This model operates on a standard 230V AC supply at 50/60 Hz.

Q3: What type of contact configuration does it feature?

A: It is equipped with 1 Changeover contact (1CO / SPDT) rated for switching control loads and signaling circuits.

Q4: How is this timer relay installed inside a panel?

A: It features a standard compact enclosure designed for 35mm DIN-rail mounting with user-friendly screw terminal wiring.

🔗 Compatible Accessories & Cross-Selling Products

• Siemens 3RT2 Series Power Contactors: Ideal for switching heavy loads or motors managed by the 3RP timer.

• Siemens 3RV2 Motor Starter Protectors / Circuit Breakers: For complete branch circuit protection in the same control panel.

• Siemens 3SB3 / 3SU1 Push Buttons & Pilot Lights: For manual system start/stop triggering and panel status indication.