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Siemens 3RT2037-1NF34 — Contactors

Siemens 3RT2037-1NF34 SIRIUS Power Contactor, Size S2, 83-15

MPN3RT2037-1NF34
Active

Siemens SIRIUS power contactor, size S2, 3RT2037-1NF34, screw-type coil terminals, 83-155 V AC/DC coil, 55 mm width, 174 mm depth, screw and snap-on mounting onto 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

3RT2037-1NF34 — Identification
ParameterValue
Contactor frame sizeS2
3RT2037-1NF34 — 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
3RT2037-1NF34 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz2 VA
Rated value @ 50 Hz83 ... 155 V
3RT2037-1NF34 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2037-1NF34 — 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)
3RT2037-1NF34 — 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
3RT2037-1NF34 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2037-1NF34 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2037-1NF34 — Mechanical
ParameterValue
Width55 mm
Height114 mm
Depth174 mm
3RT2037-1NF34 — Specifications
ParameterValue
At AC30 ... 55 ms

Product details

Coil voltage and switching capacity

The coil accepts 83-155 V AC/DC, with a 1.5 A inrush peak at pickup. At 24 V rated value it switches 6 A; at 48 V and 60 V it handles 2 A; at 110 V it's rated 1 A; at 125 V it's 0.9 A; at 220 V it's 0.3 A. That spread covers most control-voltage standards in European and North American panels.

Mechanical and electrical endurance

Mechanical life is typically 10,000,000 operations. Electrical life varies by duty: AC-1 (resistive) allows up to 800 operations per hour, AC-3 (motor starting) up to 700 ops/h, AC-4 (plugging/reversing) up to 200 ops/h. Arcing time runs 10-20 ms; the contactor's own switching frequency limits are what govern real-world panel duty cycles.

Dimensions are 114 mm high, 55 mm wide, 174 mm deep.

Environmental range and wiring

The magnet coil uses screw-type terminals accepting 2x (0.5-1.5 mm²) or 2x (0.75-2.5 mm²) solid or stranded wire.

Frequently asked questions

What is the coil voltage range for this contactor?

The coil accepts 83-155 V AC/DC, with a 1.5 A inrush peak at pickup.

What are the mounting dimensions and clearances?

The contactor measures 114 mm high, 55 mm wide, 174 mm deep. Minimum clearances are 10 mm up/down/forward and 6 mm at the sides.

Where can I buy 3RT2037-1NF34 and how is it quoted?

This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time.

MPN
3RT2037-1NF34