Skip to main content
Siemens 3RT2018-1XF41-0LA2 — Contactors

Siemens 3RT2018-1XF41-0LA2 SIRIUS Contactor, 72-125 V DC Coi

MPN3RT2018-1XF41-0LA2
Active

Siemens SIRIUS 3RT2018-1XF41-0LA2, size S00 contactor, 72-125 V DC coil, screw-type terminals, 45 mm width, 73 mm depth, 58 mm height.

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

3RT2018-1XF41-0LA2 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-1XF41-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V11.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V2 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2018-1XF41-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2018-1XF41-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2018-1XF41-0LA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG NH 3NA, DIAZED 5SB, NEOZED 5SE: 35 A
Short-circuit coordination type 2, fusegG NH 3NA, DIAZED 5SB, NEOZED 5SE: 20 A
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2018-1XF41-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT2018-1XF41-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-1XF41-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-1XF41-0LA2 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm

Product details

It switches motor loads up to 2 hp at 230 V and carries 14 A at 480 V — the AC-3 motor rating governs the real-world duty, not the resistive curve. The coil draws a 1.1 A inrush peak and holds at 0.7 times the rated voltage, dropping out at 1.25 times the rated value. That wide dropout margin means it stays closed through brief sags common on DC control buses fed by unregulated rectifiers. Size S00 is the smallest SIRIUS frame — 45 mm wide, 58 mm tall, 73 mm deep — and mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. That compact footprint and generous position tolerance make it a candidate for dense panels where every millimeter of DIN rail is allocated.

The contactor is rated for DC switching across the coil voltage range: 10 A at 24 V DC, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V. On the AC side, it delivers 3 A at 400 V, 14 A at 480 V, 2 A at 500 V, and 11 A at 600 V. The 2 hp rating at 230 V is the motor-starting figure — the AC-4 maximum switching rate of 250 operations per hour sets the ceiling for plugging or inching duty. Arcing time runs 10-15 ms, and the DC switching time is 25-45 ms. For a sourcing decision, the 14 A at 480 V and 2 hp at 230 V are the load-bearing numbers for typical three-phase motor circuits. The auxiliary switch is integrated (yes), and the main contact rating is listed as 20-12. Mechanical life is typical 30,000,000 operations. These numbers confirm the contactor is rated for industrial enclosures without forced cooling, even in cold environments like unheated warehouses.

Wiring and terminal details

The coil terminals are screw-type. The main and auxiliary terminals accept solid or stranded conductors: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or 2x 4 mm². That covers most control-circuit wiring up to 4 mm² — typical for motor starters up to 2 hp. The screw terminals are field-friendly for panel builders who prefer traditional termination over spring-cage.

Frequently asked questions

Where can I buy 3RT2018-1XF41-0LA2 and what is the lead time?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here.

What is the coil voltage and type for this contactor?

The coil is DC, rated 72-125 V DC. Pick-up voltage is 0.7 times the rated value; drop-out voltage is 1.25 times the rated value.

What are the key switching ratings for 3RT2018-1XF41-0LA2?

At 24 V DC it switches 10 A; at 480 V AC it switches 14 A; at 230 V AC it is rated for 2 hp motor load. The AC-4 maximum switching rate is 250 operations per hour.

What is the mounting and clearance requirement?

It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. Clearances needed: 10 mm upwards, forwards, and downwards; 6 mm at the side.

MPN
3RT2018-1XF41-0LA2