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Siemens 3RP1540-2AB31 — Time Delay Relays

Siemens 3RP1540-2AB31 SIRIUS Timing Relay, 0.05–600 s, 24 V

MPN3RP1540-2AB31

Siemens SIRIUS timing relay, 3RP1540-2AB31, 24 V DC, adjustable time 0.05–600 s, 5 A thermal current, screw and snap-on 35 mm DIN rail mounting.

$127.00Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RP1540-2AB31 — Identification
ParameterValue
Product designationtiming relay
3RP1540-2AB31 — Timing
ParameterValue
ON-delayNo
OFF-delayNo
Delayed switching1
At 24 V1 A
Influence of ambient temperature±5 %
3RP1540-2AB31 — Electrical
ParameterValue
Control supply voltage type (AC/DC)AC/DC
Rated surge voltage withstand4 000 V
Initial value0.85
Full-scale value1.1
3RP1540-2AB31 — Output / Contacts
ParameterValue
At 250 V0.1 A
At 125 V0.2 A
3RP1540-2AB31 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-40 ... +85 °C
Transport temperature range-40 ... +85 °C
Operating humidity range10 ... 95 %
IP protection ratingIP20
Pollution degree3
Max. installation altitude2 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
3RP1540-2AB31 — Mechanical
ParameterValue
Fastening methodscrew and snap-on mounting onto 35 mm DIN rail
Mounting positionany
Removable terminalsYes
Width22.5 mm
Height84 mm
Depth91 mm
Wire range, solid (AWG)24 ... 16
Wire range, stranded (AWG)24 ... 16
Wire range, finely stranded w/ ferrule (mm²)0.3 ... 1.5 mm²
Clearance, rear0 mm
Clearance, front0 mm
Clearance, sides0 mm
Clearance, top0 mm
Clearance, bottom0 mm

Product details

The adjustable time range spans 0.05 to 600 s, set via a front-panel potentiometer or DIP switches depending on variant — this unit carries a 0.85 initial value multiplier and 1.1 full-scale factor, meaning the actual delay equals the dial setting times these coefficients. Recovery time between cycles is 150 ms, and the minimum ON period is 200 ms, so it won't retrigger on fast transients. The relay contact is rated 1 A at 24 V DC, 0.2 A at 125 V DC, and 0.1 A at 250 V AC/DC — these are the switching limits, not the continuous carry current. The thermal current (Ith) is 5 A, which governs the continuous current through the contact path when the relay is not switching. For a 24 V DC control circuit, the 1 A switching rating is the number to check against your load's inrush and breaking requirements. The 22.5 mm width fits standard enclosure rail spacing; any mounting position is allowed.

Screw terminals accept 2 x (24–16 AWG) solid or stranded conductors. The 22.5 mm width and 91 mm depth fit standard 35 mm DIN rail enclosures; no additional clearance is required in any direction (0 mm spacing upwards, downwards, forwards, backwards, and to the side). Basic insulation with pollution degree 3 suits industrial control panels where conductive dust or humidity is present.

Frequently asked questions

Where can I buy 3RP1540-2AB31 and what is the lead time?

The 3RP1540-2AB31 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or lead-time figures are published here.

What is the adjustable time range on this timing relay?

The adjustable time range is 0.05 to 600 seconds, set via front-panel controls. The actual delay equals the dial setting multiplied by the initial value factor (0.85) and full-scale factor (1.1).

What are the contact ratings for 3RP1540-2AB31?

The relay output is rated 1 A at 24 V DC, 0.2 A at 125 V DC, and 0.1 A at 250 V AC/DC. The thermal continuous current (Ith) is 5 A.

Does 3RP1540-2AB31 mount on DIN rail?

Yes, it snaps onto 35 mm DIN rail using the integrated latch, and can also be screw-mounted. No clearance is needed in any direction around the housing.

MPN
3RP1540-2AB31