Siemens 3RP1531-1AQ30 SIRIUS Time Delay Relay, 0.5-10 s

Name: 3RP1531-1AQ30
Brand: Siemens
SKU: 3RP1531-1AQ30
Availability: LimitedAvailability
Author: MRO Marisol

Specifications

Identification

3RP1531-1AQ30 — Identification
Parameter	Value
Product designation	timing relay

Timing

3RP1531-1AQ30 — Timing
Parameter	Value
ON-delay	No
OFF-delay	Yes
Delayed switching	1
At 24 V	1 A
Influence of ambient temperature	±5 %

Electrical

3RP1531-1AQ30 — Electrical
Parameter	Value
Control supply voltage type (AC/DC)	AC/DC
At 50 Hz	100 ... 127 V
At 60 Hz	100 ... 127 V
Rated surge voltage withstand	4 000 V
Initial value	0.85
Full-scale value	1.1

Output / Contacts

3RP1531-1AQ30 — Output / Contacts
Parameter	Value
At 250 V	0.1 A
At 125 V	0.2 A

Environmental

3RP1531-1AQ30 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-40 ... +85 °C
Transport temperature range	-40 ... +85 °C
Operating humidity range	10 ... 95 %
IP protection rating	IP20
Pollution degree	3
Max. installation altitude	2 000 m
Shock resistance (IEC 60068-2-27)	11g / 15 ms
Vibration resistance (IEC 60068-2-6)	10 ... 55 Hz / 0.35 mm
ESD immunity (IEC 61000-4-2)	4 kV contact discharge / 8 kV air discharge
Burst immunity (IEC 61000-4-4)	2 kV network connection / 1 kV control connection

Mechanical

3RP1531-1AQ30 — Mechanical
Parameter	Value
Fastening method	screw and snap-on mounting onto 35 mm DIN rail
Mounting position	any
Removable terminals	Yes
Width	22.5 mm
Height	102 mm
Depth	91 mm
Wire range, solid (AWG)	20 ... 14
Wire range, stranded (AWG)	20 ... 14
Wire range, finely stranded w/ ferrule (mm²)	0.5 ... 2.5 mm²
Clearance, rear	0 mm
Clearance, front	0 mm
Clearance, sides	0 mm
Clearance, top	0 mm
Clearance, bottom	0 mm

Product details

What it does in the panel

The Siemens SIRIUS 3RP1531-1AQ30 is a single-function timing relay built for off-delay duty — the output drops out a settable time after the control signal is removed, which is the pattern most often used for fan run-down, lamp hold-on, and controlled discharge sequencing in a control panel.

Timing envelope and contact ratings

The on-board adjustment runs 0.5 to 10 s, with a 150 ms recovery time and a 35 ms minimum ON period — meaning the relay needs the trigger pulse held for at least 35 ms to start its timing cycle cleanly, and re-arms within 150 ms after the cycle ends.

Fit, footprint, and wiring

The housing footprint is 22.5 mm wide by 102 mm tall by 91 mm deep — the standard SIRIUS 22.5 mm module width, so it shares DIN-rail real estate with adjacent SIRIUS timers and coupling relays without a special cutout.

Frequently asked questions

Where does the 3RP1531-1AQ30 drop into a panel originally built around a 6GK7243-1PX30-0XE0?

It does not. The 6GK7243-1PX30-0XE0 is a communications module, not a SIRIUS timing relay — they are different device classes, different DIN-rail footprints, and different wiring. The 3RP1531-1AQ30 belongs in the timer row of a control panel, not in the network slot.

What timing window does the 3RP1531-1AQ30 cover?

The 3RP1531-1AQ30 adjusts from 0.5 s to 10 s with scale markers between 0.85 and 1.1 across the dial — suited to short off-delay sequencing such as cooling-fan run-down, lamp hold-on, and valve de-energisation delays rather than long multi-minute timing.