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Siemens 3RU2126-4AC0-ZX95 — Overload Relays

Siemens 3RU2126-4AC0-ZX95 SIRIUS Thermal Overload Relay, Cla

MPN3RU2126-4AC0-ZX95
Active

Siemens SIRIUS thermal overload relay, size S0, Trip Class 10, 690 V rated, spring-loaded terminals, 3RU2126-4AC0-ZX95.

Siemens 3RU2126-4AC0-ZX95 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

3RU2126-4AC0-ZX95 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S0
Combinable contactor sizesS0
Reference code (IEC 81346-2)F
3RU2126-4AC0-ZX95 — Protection & Trip
ParameterValue
Overload current setting range11 ... 16 A
Trip classCLASS 10
Overload release typethermal
3RU2126-4AC0-ZX95 — Electrical (main circuit)
ParameterValue
Rated operational current16 A
Poles (main circuit)3
Rated operating frequency50 ... 60 Hz
Rated insulation voltage (AC, pollution degree 3)690 V
Rated value (AC-3e), max.690 V
Rated surge withstand voltage6 kV
Main current circuitspring-loaded terminals
Power loss at rated current (hot)8.1 W
Per pole2.7 W
3RU2126-4AC0-ZX95 — Auxiliary contacts
ParameterValue
Auxiliary contacts: NO1
Auxiliary contacts: NC1
Auxiliary contacts: CO (changeover)0
Auxiliary switch short-circuit protection (required fuse)fuse gG: 6 A, quick: 10 A
Switching current at 24 V2 A
Switching current at 60 V0.3 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
3RU2126-4AC0-ZX95 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
Mounting positionany
Main-circuit connector arrangementTop and bottom
Auxiliary/control circuit connection typespring-loaded terminals
Removable aux./control terminalNo
Conductor cross-section: solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range (AWG), main contacts1x (18 ... 8)
Conductor range (AWG), auxiliary contacts2x (20 ... 14)
3RU2126-4AC0-ZX95 — Environmental
ParameterValue
Operating temperature-40 ... +70 °C
Storage temperature-55 ... +80 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating10 ... 95 %
Max. installation altitude2 000 m
3RU2126-4AC0-ZX95 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth84 mm

Product details

The Siemens 3RU2126-4AC0-ZX95 is a SIRIUS thermal overload relay in size S0, designed for motor protection with Trip Class 10. It mounts directly to a contactor and accepts spring-loaded terminals for the main circuit, accepting 2x (0.5 to 2.5 mm²) solid or stranded wire.

The auxiliary contact ratings span 24 V at 2 A up to 400 V at 1 A, so the N/O or N/C signal can switch a PLC input or a contactor coil directly at those voltages without an interposing relay. The S0 frame size and 45 mm width mean it fits standard SIRIUS contactor mounting rails.

Frequently asked questions

Where can I buy 3RU2126-4AC0-ZX95 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.

What is the note for message 'Tripped' on this component?

The listed note is 'for message "Tripped"' — this is a variant identifier indicating the relay includes an auxiliary contact that signals a tripped state.

What are the key ratings of 3RU2126-4AC0-ZX95?

Trip Class 10, rated insulation voltage 690 V, auxiliary contact ratings from 24 V / 2 A to 400 V / 1 A, size S0, width 45 mm, depth 84 mm, height 102 mm.

MPN
3RU2126-4AC0-ZX95