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Siemens 3RT1344-1AP00 — Contactors

Siemens 3RT1344-1AP00 SIRIUS Power Contactor, Size S3, 42 kW

MPN3RT1344-1AP00

Siemens SIRIUS power contactor, Size S3, 3RT1344-1AP00, 42 kW at 230 V 50 Hz, 1000 V insulation, screw-type terminals, snap-on mounting.

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

3RT1344-1AP00 — Identification
ParameterValue
Contactor frame sizeS3
3RT1344-1AP00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1344-1AP00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1344-1AP00 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts4
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1344-1AP00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 125 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1344-1AP00 — 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), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 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 and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1344-1AP00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1344-1AP00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1344-1AP00 — Mechanical
ParameterValue
Width93 mm
Height146 mm
Depth139 mm
3RT1344-1AP00 — Specifications
ParameterValue
At AC10 ... 25 ms

Product details

Dimensions are 146 mm high, 93 mm wide, and 139 mm deep — the 93 mm width is the key panel fill factor when laying out a row of S3 contactors.

Solid wire acceptance: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max. 2x (0.75... 4 mm²). Stranded main conductors: 2x (10... 50 mm²). For the main contacts, AWG cables 2x (10... 1/0) are accepted. At 40 °C and 60 °C, the minimum permissible conductor cross-section is 35 mm². The short-circuit protection coordination (type 2) requires a fuse gL/gG: 125 A.

Frequently asked questions

What are the key ratings for the 3RT1344-1AP00?

It is a Size S3 power contactor rated for 42 kW at 230 V 50 Hz, with an insulation voltage of 1000 V and surge voltage resistance of 6 kV. The main circuit uses screw terminals accepting stranded conductors up to 2x 50 mm².

What is the mounting method for this contactor?

It mounts via screw and snap-on onto 35 mm and 75 mm standard mounting rail, and side-by-side mounting is permitted.

What compliance documentation is available for the 3RT1344-1AP00?

The part carries a RoHS compliance date of 05/01/2012. The insulation voltage rating of 1000 V and pollution degree 3 indicate it meets IEC 60947-4-1 requirements for industrial control equipment.

MPN
3RT1344-1AP00