
Siemens SIRIUS 3RB3 Electronic Overload Relay 10...40 A, Size S0, Class 5...30, Main Screw, Aux Screw, Ground Fault Detection
Pricing
Request a quote
We reply within 24 hours
Product Description
Siemens 3RB3123-4VB0 Electronic Overload Relay 10-40A.
Technical Specifications
- Manufacturer part number (MPN)
- 3RB3123-4VB0 EAN / GTIN: 4011209749634 Sales unit: pcs Product type designation: 3RB3 Size of overload relay: S0 Size of contactor can be combined company-specific: S0 Power loss [W] for rated value of the current at AC in hot operating state: 3 W Type of calculation of power loss current-dependent: quadratic Insulation voltage with degree of pollution 3 at AC rated value: 690 V Surge voltage resistance rated value: 6 kV Shock resistance: 15 g / 11 ms Vibration resistance: 1 … 6 Hz, 15 mm; 6 … 500 Hz, 20 m/s²; 10 cycles Thermal current: 40 A Recovery time after overload trip — with automatic reset typical: 3 min Recovery time after overload trip — Net Weight: 0.26 kg Installation altitude at height above sea level maximum: 2 000 m Ambient temperature — during operation: -25 ... +60 °C Ambient temperature — during storage: -40 ... +80 °C Temperature compensation: -25 ... +60 °C Relative humidity during operation: 10 ... 95 % Number of poles for main current circuit: 3 Adjustable current response value current of the current-dependent overload release: 10 ... 40 A Operating voltage — rated value: 690 V Operating voltage — for remote-reset function at DC: 24 V Operating frequency rated value: 50 ... 60 Hz Operational current rated value: 40 A Operational current at AC-3e at 400 V rated value: 40 A Operating power — for 3-phase motors at 400 V at 50 Hz: 5.5 ... 18.5 kW Operating power — for AC motors at 500 V at 50 Hz: 7.5 ... 22 kW Operating power — for AC motors at 690 V at 50 Hz: 11 ... 37 kW Number of NC contacts for auxiliary contacts: 1 Number of NO contacts for auxiliary contacts: 1 Operational current of auxiliary contacts at AC-15 — at 24 V: 4 A Operational current of auxiliary contacts at AC-15 — at 230 V: 3 A Operational current of auxiliary contacts at DC-13 — at 24 V: 2 A Operational current of auxiliary contacts at DC-13 — at 110 V: 0.3 A Operational current of auxiliary contacts at DC-13 — at 220 V: 0.11 A Trip class: CLASS 5E, 10E, 20E and 30E adjustable Response value current of the grounding protection minimum: 0.75 x IMotor Response time of the grounding protection in settled state: 1 000 ms Full-load current (FLA) for 3-phase AC motor — at 480 V rated value: 40 A Full-load current (FLA) for 3-phase AC motor — at 600 V rated value: 40 A Contact rating of auxiliary contacts according to UL: B600 / R300 Design of the fuse link — with type of coordination 1 required: gG: 125 A, J: 150 A Design of the fuse link — with type of coordination 2 required: gG: 80 A, J: 100 A Design of the fuse link — for short-circuit protection of the auxiliary switch required: fuse gG: 6 A Mounting position: any Installation/ mounting/ dimensions — height: 87 mm Installation/ mounting/ dimensions — width: 45 mm Installation/ mounting/ dimensions — depth: 84 mm Type of connectable conductor cross-sections for main contacts — solid: 2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²) Type of connectable conductor cross-sections for main contacts — stranded: 2x 10 mm² Type of connectable conductor cross-sections for main contacts — finely stranded with core end processing: 1x (1 ... 6 mm²), 2 x (1 ... 6 mm²), 1x 10 mm² Tightening torque — for main contacts with screw-type terminals: 2 ... 2.5 N·m Size of the screwdriver tip: Pozidriv PZ 2 Design of the thread of the connection screw — for main contacts: M4 Design of the thread of the connection screw — of the auxiliary and control contacts: M3 Protection class IP on the front according to IEC 60529: IP20 Conducted interference — due to burst according to IEC 61000-4-4: 2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3 Conducted interference — due to conductor-earth surge according to IEC 61000-4-5: 2 kV (line to earth) corresponds to degree of severity 3 Field-based interference according to IEC 61000-4-3: 10 V/m Electrostatic discharge according to IEC 61000-4-2: 6 kV contact discharge / 8 kV air discharge Mounting method: Direct attachment Width: 45 mm Height: 87 mm Depth: 84 mm Number of auxiliary contacts as normally open contact: 1 Number of auxiliary contacts as normally closed contact: 1 Release class: Adjustable Type of electrical connection of main circuit: Screw connection Reset function input: Yes Reset function automatic: Yes Country of origin: Czechia
Standards & Compliance
- HS Code
- 8536.49
Cross References
- EAN 4011209749634
- SAP 1000097464
- Code 8939253
Product Documentation
More from Siemens

Siemens
Siemens ALPHA 630, floor-standing cabinet, IP43, safety class 2, H: 1950 mm, W: 800 mm, D: 210 mm, RAL 7035
8GK1332-8KA32

Siemens
Siemens Alpha 400 Din, Panel board Surface-mounted mounting, Delivery Form Flat Pack, Ap-Cabinet, Colour Ral 9016 8GK1102-7KK52

Siemens
Siemens 3TK1934-0D

Siemens
Siemens SIMATIC S7 automation module 6ES7952-0AF00-0AA0

Siemens
Siemens Sinamics G120C PN 3AC 400V 5,5kW without filter
6SL3210-1KE21-3UF1

Siemens
Siemens SENTRON 5SY7406-6 Miniature Circuit Breaker 4-Pole B6A 15KA

Siemens
Siemens LED light 5W,24-48VDC, MOTION DETECTOR 8MR2201-0C

Siemens
Siemens 3RB3123-4VE0 SIRIUS 3RB3 Solid-State Overload Relay with Ground-Fault Detection — 10 – 40 A, Size S0, Spring-Loaded Terminals
Technical guides
Catalogue entry last verified: 2026-09-29. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 3RB3123-4VB0?
- 3RB3123-4VB0 can be ordered from cballast.com as a Siemens catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Siemens product?
- The manufacturer part number is 3RB3123-4VB0.
- What is the HS code for 3RB3123-4VB0?
- The customs tariff (HS) code for 3RB3123-4VB0 is 8536.49.
- Who manufactures 3RB3123-4VB0?
- 3RB3123-4VB0 is a Siemens product in the Switchgear & Protection range.
- Is a datasheet available for 3RB3123-4VB0?
- Yes — the 3RB3123-4VB0 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 3RB3123-4VB0?
- The minimum order quantity is 1.
- Is 3RB3123-4VB0 available?
- Yes — 3RB3123-4VB0 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).
