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Siemens 3RU1126-4CD1 — Overload Relays

Siemens 3RU1126-4CD1 SIRIUS Thermal Overload Relay, Class 10

MPN3RU1126-4CD1

Siemens SIRIUS thermal overload relay, 3RU1126-4CD1, size S0, Trip Class 10, 3-pole, screw-type main terminals, IP20 front protection.

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

3RU1126-4CD1 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S0
Combinable contactor sizesS0
Reference code (IEC 81346-2)F
3RU1126-4CD1 — Protection & Trip
ParameterValue
Overload current setting range17 ... 22 A
Trip classCLASS 10
3RU1126-4CD1 — Electrical (main circuit)
ParameterValue
Poles (main circuit)3
Rated insulation voltage (AC, pollution degree 3)690 V
Rated surge withstand voltage6 kV
Main current circuitscrew-type terminals
Power loss at rated current (hot)8.1 W
Per pole2.7 W
3RU1126-4CD1 — 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
3RU1126-4CD1 — Connection & Mounting
ParameterValue
Mounting / fastening methodstand-alone installation
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 contacts1x (16 ... 12), 1x (14 ... 8)
Conductor range (AWG), auxiliary contacts2x (20 ... 14)
3RU1126-4CD1 — 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
3RU1126-4CD1 — Mechanical
ParameterValue
Width45 mm
Height97 mm
Depth96 mm
3RU1126-4CD1 — Specifications
ParameterValue
Type Of ProtectionDMT 98 ATEX G 001

Product details

Mounts stand-alone on a vertical surface with ±135° rotation and ±45° tilt front-to-back. The 96 mm depth and 45 mm width fit standard S0 contactor footprints — direct coupling to a 3RT2 contactor is the typical panel layout.

Main current circuit uses screw-type terminals accepting 1x (16…12) or 1x (14…8) AWG. Auxiliary and control circuit uses Cage Clamp terminals for 2x (20…14) AWG. Solid conductors up to 2x (0.5…2.5 mm²) and finely stranded with ferrule up to 2x (0.5…1.5 mm²) are supported. Per-pole power dissipation is 2.7 W.

Operating temperature range -20 to +70 °C; storage and transport -55 to +80 °C. Relative humidity up to 100% during operation. Shock resistance 8g / 10 ms. Surge voltage resistance rated at 6 kV. IP20 protection on the front. ATEX approval for explosive atmospheres (DMT 98 ATEX G 001). RoHS compliance date 07/01/2006. Lifecycle status is current production.

Auxiliary contacts rated: 1 A at 24 V, 0.22 A at 110 V, 3 A at 120 V, 0.22 A at 125 V, 0.11 A at 220 V, 2 A at 230 V, 1 A at 400 V. These are the switching capacities for the built-in auxiliary contacts used for signaling or control interlocking.

Frequently asked questions

Where can I buy 3RU1126-4CD1?

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

What is the Trip Class of 3RU1126-4CD1?

Trip Class 10, meaning it will trip within 10 seconds at 7.2× the set current — standard for general-purpose motor protection.

What is the depth of 3RU1126-4CD1?

96 mm depth, 45 mm width, 97 mm height. Fits standard S0 contactor footprints.

What compliance documentation does 3RU1126-4CD1 carry?

ATEX approval DMT 98 ATEX G 001 for explosive atmospheres, RoHS compliance from 07/01/2006, IP20 front protection, and surge voltage resistance 6 kV.

MPN
3RU1126-4CD1