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Siemens 3RU1146-4HD0 — Overload Relays

Siemens 3RU1146-4HD0 SIRIUS Thermal Overload Relay, Trip Cla

MPN3RU1146-4HD0

Siemens SIRIUS thermal overload relay, S3 size, Trip Class 10, 3RU1146-4HD0, screw-type main terminals, cage-clamp auxiliary contacts.

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

3RU1146-4HD0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S3
Combinable contactor sizesS3
Reference code (IEC 81346-2)F
3RU1146-4HD0 — Protection & Trip
ParameterValue
Overload current setting range36 ... 50 A
Trip classCLASS 10
3RU1146-4HD0 — Electrical (main circuit)
ParameterValue
Poles (main circuit)3
Rated insulation voltage (AC, pollution degree 3)1 000 V
Rated surge withstand voltage8 kV
Main current circuitscrew-type terminals
Power loss at rated current (hot)15.3 W
Per pole5.1 W
3RU1146-4HD0 — Auxiliary contacts
ParameterValue
Auxiliary contacts: NO1
Auxiliary contacts: NC1
Auxiliary contacts: CO (changeover)0
Auxiliary switch short-circuit protection (required fuse)fuse gL/gG: 6 A, quick: 10 A
Switching current at 24 V1 A
Switching current at 110 V0.22 A
Switching current at 120 V3 A
Switching current at 125 V0.22 A
Switching current at 220 V0.11 A
Switching current at 230 V2 A
Switching current at 400 V1 A
3RU1146-4HD0 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
Mounting positionwith vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back
Auxiliary/control circuit connection typeCage Clamp terminals
Removable aux./control terminalNo
Conductor cross-section: solid2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.5 ... 1.5 mm²)
Conductor range (AWG), main contacts2x (10 ... 1/0), 1x (10 ... 2/0)
Conductor range (AWG), auxiliary contacts2x (20 ... 14)
3RU1146-4HD0 — Environmental
ParameterValue
Operating temperature-20 ... +70 °C
Storage temperature-55 ... +80 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating100 %
Max. installation altitude2 000 m
Shock resistance8g / 10 ms
3RU1146-4HD0 — Mechanical
ParameterValue
Width70 mm
Height120 mm
Depth140 mm
3RU1146-4HD0 — Specifications
ParameterValue
Type Of ProtectionDMT 98 ATEX G 001

Product details

Trip Class and Motor Protection

The S3 size handles the current range typical for this frame; the per-pole power dissipation is 5.1 W, which factors into enclosure thermal calculations.

Mounts directly on the contactor — no separate DIN rail needed for the relay itself. The mounting position allows rotation ±135° on a vertical surface and tilting ±45° front-to-back, giving panel builders flexibility in tight layouts.

Main circuit terminals accept solid conductors 2x (0.5... 2.5 mm²) or stranded 2x (10... 50 mm²) and single 10... 70 mm². AWG equivalents for main contacts: 2x (10... 1/0) or 1x (10... 2/0). Auxiliary circuit uses cage-clamp terminals accepting 2x (20... 14) AWG. The auxiliary contact ratings: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V.

For Type 1 coordination (relay may need replacement after fault) requires a gG fuse rated 160 A. Surge voltage resistance is 8 kV. The relay carries ATEX approval DMT 98 ATEX G 001 for use in potentially explosive atmospheres.

Frequently asked questions

What is the depth of the 3RU1146-4HD0?

The depth is 140 mm, with width 70 mm and height 120 mm.

What wire sizes does the 3RU1146-4HD0 accept on the main terminals?

Solid: 2x (0.5... 2.5 mm²). Stranded: 2x (10... 50 mm²) or single 10... 70 mm². AWG: 2x (10... 1/0) or 1x (10... 2/0).

Can the 3RU1146-4HD0 be used in ATEX-rated environments?

Yes, it carries ATEX approval DMT 98 ATEX G 001 for use in potentially explosive atmospheres.

Where can I buy the 3RU1146-4HD0 and get current pricing?

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

MPN
3RU1146-4HD0