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Siemens 3RT2038-1NB34-3MA0 — Contactors

Siemens 3RT2038-1NB34-3MA0 SIRIUS Power Contactor, 55 mm

MPN3RT2038-1NB34-3MA0
Active

Siemens SIRIUS power contactor, size S2, 3RT2038-1NB34-3MA0, 55 mm width, screw-type coil terminals, 20-33 V rated coil voltage, screw and snap-on mounting on 35 mm DIN rail.

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

3RT2038-1NB34-3MA0 — Identification
ParameterValue
Contactor frame sizeS2
3RT2038-1NB34-3MA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V55 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V15 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2038-1NB34-3MA0 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2 VA
Rated value @ 50 Hz20 ... 33 V
3RT2038-1NB34-3MA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2038-1NB34-3MA0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2038-1NB34-3MA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2038-1NB34-3MA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2038-1NB34-3MA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2038-1NB34-3MA0 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2038-1NB34-3MA0 — Specifications
ParameterValue
At AC30 ... 55 ms

Product details

It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible — +/-180° rotation on a vertical surface, plus +/-22.5° tilt forward or backward. That helps when you're retrofitting into a cramped enclosure and the rail is at an odd angle. The coil is screw-type terminals, rated 20-33 V, with an inrush peak of 3 A and a holding draw of 2 VA at 50 or 60 Hz. Switching capacity at 24 V rated value is 6 A, at 48 V it's 2 A, and at 220 V it's 0.3 A. That's the inductive load curve — the contactor can handle a fair spread of control voltages, but the higher the voltage, the lower the current it can break.

Clearances and panel integration

Physical footprint: 55 mm wide, 114 mm tall, 174 mm deep. That's tight enough to pack several contactors side by side in a multi-row DIN rail assembly, but allow the forward gap for arc venting. That covers most indoor panel environments, even unheated warehouses. The contactor is rated for AC-1 (resistive) at 700 operations per hour maximum, AC-3 (motor starting) at 500 ops/h, and AC-4 (plugging/inching) at 150 ops/h. If your application cycles faster than that, you'll need to derate or pick a larger frame.

Frequently asked questions

What is the width of 3RT2038-1NB34-3MA0?

The width is 55 mm.

What clearance do I need around this contactor?

You need 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm to the side.

MPN
3RT2038-1NB34-3MA0