Skip to main content
Log in
Siemens 3RT2038-1KB44 — Contactors

Siemens 3RT2038-1KB44 SIRIUS Contactor, 24 VDC Coil

MPN3RT2038-1KB44
Active

Siemens SIRIUS Size S2 coupling contactor, 3RT2038-1KB44, 24 VDC coil, screw terminals, 15 hp at 230 V, 55 mm wide, 114 mm tall, 174 mm deep, DIN rail mount.

$185.42Ref. price · indicative, final on quote
Siemens 3RT2038-1KB44 datasheet (PDF)
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

3RT2038-1KB44 — Identification
ParameterValue
Contactor frame sizeS2
3RT2038-1KB44 — 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
3RT2038-1KB44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2038-1KB44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2038-1KB44 — 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)
3RT2038-1KB44 — 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
3RT2038-1KB44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2038-1KB44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2038-1KB44 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm

Product details

Integrator's field note — 3RT2038-1KB44

The 24 VDC coil draws a 2.6 A inrush peak and holds at 6 A. Screw-type coil terminals accept 2x (0.5 to 1.5 mm²) solid or stranded. Main contact arrangement is 18 normally open plus 1 normally closed — no auxiliary switch block fitted from the factory.

Overall dimensions: 55 mm wide, 114 mm tall, 174 mm deep — fits standard S2 panel cutouts.

Duty cycle and operating conditions

Maximum switching frequency varies by duty: 700 cycles/hour at AC-1 (resistive), 500 at AC-3 (motor start/run), 350 at AC-2, and 150 at AC-4 (plugging/inching).

DC load switching capability

The main contacts can switch DC loads at various voltage levels: 6 A at 24 V, 2 A at 48 V or 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.6 A at 440 V, and 3 A at 400 V. These are resistive DC ratings — inductive DC loads require derating.

Frequently asked questions

What is the price of 3RT2038-1KB44?

Pricing for the 3RT2038-1KB44 is confirmed at quote time based on current market conditions and order quantity. Submit an RFQ for a competitive price on this Siemens SIRIUS contactor.

Is 3RT2038-1KB44 available via RFQ confirmation at distributors?

Stock positions vary by distributor. The 3RT2038-1KB44 is sourced to order against an RFQ through independent supply channels. Contact us for current availability and lead time.

Is 3RT2038-1KB44 suitable for switching DC loads?

Yes. The main contacts are rated for DC loads: 6 A at 24 V, 2 A at 48 V or 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.6 A at 440 V, and 3 A at 400 V. These are resistive DC ratings; inductive loads require derating.

MPN
3RT2038-1KB44