Skip to main content
Log in
Siemens 3RP1540-2BW31 — Time Delay Relays

Siemens 3RP1540-2BW31 SIRIUS Time Relay, 24-240V AC/DC, 0.05

MPN3RP1540-2BW31

Siemens SIRIUS 3RP1540-2BW31 time relay, 24-240 V AC/DC supply, adjustable 0.05-600 s delay, 5 A thermal current, relay output, screw and snap-on mounting on 35 mm DIN rail.

$163.00Ref. price · indicative, final on quote
Siemens 3RP1540-2BW31 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RP1540-2BW31 — Identification
ParameterValue
Product designationtiming relay
3RP1540-2BW31 — Timing
ParameterValue
ON-delayNo
OFF-delayNo
Delayed switching2
At 24 V1 A
Influence of ambient temperature±5 %
3RP1540-2BW31 — Electrical
ParameterValue
Control supply voltage type (AC/DC)AC/DC
At 50 Hz24 ... 240 V
At 60 Hz24 ... 240 V
Rated surge voltage withstand4 000 V
Initial value0.85
Full-scale value1.1
3RP1540-2BW31 — Output / Contacts
ParameterValue
At 250 V0.1 A
At 125 V0.2 A
3RP1540-2BW31 — 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
3RP1540-2BW31 — Mechanical
ParameterValue
Fastening methodscrew and snap-on mounting onto 35 mm standard mounting rail
Mounting positionany
Removable terminalsYes
Width22.5 mm
Height103 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 Siemens 3RP1540-2BW31 is a SIRIUS time relay with a relay output, adjustable delay from 0.05 to 600 seconds, and a 24-240 V AC/DC supply range. The thermal current rating of 5 A and contact ratings (1 A at 24 V, 0.2 A at 125 V, 0.1 A at 250 V) define its switching capacity for pilot-duty loads like contactor coils, signal lamps, or PLC inputs.

The 22.5 mm width and 103 mm height fit a standard DIN-rail footprint. Clearance of 0 mm on all sides (upwards, forwards, backwards, downwards, at the side) means it can be packed tight against adjacent devices without derating — useful in dense panels.

Frequently asked questions

Where can I buy 3RP1540-2BW31 and get current pricing?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is the adjustable time range on this relay?

The delay is adjustable from 0.05 to 600 seconds. It is an ON-delay type with no OFF-delay or pulse-shaping functions.

What supply voltage does 3RP1540-2BW31 accept?

It accepts 24-240 V AC at 50/60 Hz and 24-240 V DC, simplifying stocking across mixed-voltage control circuits.

What are the contact ratings for this time relay?

Thermal current is 5 A. Switching capacity: 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V. These ratings suit pilot-duty loads like contactor coils and signal lamps.

MPN
3RP1540-2BW31