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Siemens 3RT2037-1NE34 — Contactors

Siemens 3RT2037-1NE34 SIRIUS Power Contactor, 48-80 V Coil,

MPN3RT2037-1NE34
Active

Siemens SIRIUS power contactor, 3RT2037-1NE34, Size S2, coil rated 48-80 V, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail per EN 60715.

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

3RT2037-1NE34 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1NE34 — 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 V10 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2037-1NE34 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2 VA
Rated value @ 50 Hz48 ... 80 V
3RT2037-1NE34 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1NE34 — 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: 125A (690V,100kA), aM: 63A (690V,100kA), BS88: 100A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2037-1NE34 — 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2037-1NE34 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1NE34 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1NE34 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1NE34 — Specifications
ParameterValue
At AC30 ... 55 ms

Product details

The coil accepts 48 to 80 V AC or DC, with a pickup threshold of 0.8 x rated value. It mounts via screw or snap-on onto 35 mm standard mounting rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward/backward — useful when you're squeezing it into a tight gland-plate layout.

Coil and switching ratings

Coil inrush peaks at 1 A, steady-state draw is 2 VA at both 50 and 60 Hz. The magnet coil uses screw-type terminals, and the main contacts are rated for 18 A at AC-3 duty (motor switching) — that's the number that governs real motor loads, not the AC-1 resistive rating. Operating rate at AC-3 is 700 cycles per hour max; AC-4 (plugging/inching) drops to 200 cycles per hour.

Panel fit and clearances

Dimensions: 55 mm wide, 114 mm tall, 174 mm deep. That depth is the body plus coil terminals — measure your gland-plate clearance before you commit the panel layout. Wire range: 2 x (0.5 to 1.5 mm²) or 2 x (0.75 to 2.5 mm²) solid or stranded.

Frequently asked questions

Will 3RT2037-1NE34 drop into a panel specified around 3RT2015-2BB44-3MA0?

The 3RT2037-1NE34 is a Size S2 frame (55 mm wide, 174 mm deep), while the 3RT2015-2BB44-3MA0 is a smaller Size S0 frame. The footprint and DIN-rail spacing differ — you'd need to verify the mounting hole pattern and depth clearance before swapping.

MPN
3RT2037-1NE34