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Siemens 3RB2026-2RD0 — Overload Relays

Siemens 3RB2026-2RD0 SIRIUS Solid-State Overload Relay, Clas

MPN3RB2026-2RD0

Siemens SIRIUS solid-state overload relay, 3-pole, Class 20E, ATEX Ex II (2) GD, screw-type main terminals, 45 mm wide.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RB2026-2RD0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationsolid-state overload relay
Combinable contactor sizesS0
Reference code (IEC 81346-2)F
3RB2026-2RD0 — Protection & Trip
ParameterValue
Overload current setting range0.1 ... 0.4 A
Trip classCLASS 20E
3RB2026-2RD0 — 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)0.05 W
Per pole0.02 W
3RB2026-2RD0 — 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
Switching current at 24 V2 A
Switching current at 60 V0.55 A
Switching current at 110 V0.3 A
Switching current at 120 V4 A
Switching current at 125 V0.3 A
Switching current at 220 V0.11 A
Switching current at 230 V3 A
3RB2026-2RD0 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
Mounting positionany
Auxiliary/control circuit connection typespring-loaded terminals
Removable aux./control terminalYes
Conductor cross-section: solid2x (0.25 ... 1.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.25 ... 1.5 mm²)
Conductor range (AWG), main contacts2x (14 ... 10)
Conductor range (AWG), auxiliary contacts2x (24 ... 16)
3RB2026-2RD0 — Environmental
ParameterValue
Operating temperature-25 ... +60 °C
Storage temperature-40 ... +80 °C
Transport temperature-40 ... +80 °C
Relative humidity, operating100 %
Max. installation altitude2 000 m
Shock resistance15g / 11 ms
3RB2026-2RD0 — Mechanical
ParameterValue
Width45 mm
Height73 mm
Depth75 mm
3RB2026-2RD0 — Specifications
ParameterValue
Type Of ProtectionPTB 06 ATEX 3001 Ex II (2) GD

Product details

The Siemens 3RB2026-2RD0 is a SIRIUS solid-state overload relay for three-phase motor protection.

The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) means this relay is certified for use in Zone 2 gas and Zone 22 dust hazardous areas when paired with an appropriate contactor — the (2) designation indicates it is associated apparatus, not installed in the hazardous zone itself, but suitable for protecting motors in those classified locations. The 6 kV surge voltage withstand (rated value) and 2 kV burst immunity on power ports (IEC 61000-4-4, severity level 3) mean it holds up in industrial panels with contactor switching and variable-frequency drive noise without nuisance trips. The 15g / 11 ms shock resistance and any mounting position flexibility make it practical for mobile equipment or panels subject to vibration — no derating needed for horizontal or inverted mounting.

Frequently asked questions

What compliance documentation does this part carry?

The part carries ATEX certification (PTB 06 ATEX 3001 Ex II (2) GD) for hazardous-area motor protection. It also references IEC 61000-4-4 burst immunity at severity level 3. The substance prohibitance date of 07/01/2006 indicates RoHS compliance from that date forward.

What is the physical size and mounting?

Width is 45 mm, height 73 mm, depth 75 mm. It mounts directly onto a SIRIUS contactor (contactor mounting fastening method) — no separate DIN-rail footprint needed. Any mounting position is permitted.

What wire sizes does it accept?

Main circuit terminals accept 2x (0.25–1.5 mm²) solid or 2x (14–10 AWG). Auxiliary and control circuit terminals accept 2x (0.25–1.5 mm²) finely stranded with ferrule, or 2x (24–16 AWG).

MPN
3RB2026-2RD0