Siemens 3RV23 Magnetic MPCB

The Siemens 3RV23 is a motor protection circuit breaker. It combines motor switching, overload protection, short-circuit protection and phase-failure sensitivity in one compact device, and can be combined with a contactor to build a complete DOL or star-delta starter.

Key features

Magnetic-only protection for use with a separate overload relay
Magnetic short-circuit protection
Compact width for MCC panels
Rotary/push handle with trip indication and padlocking
Auxiliary contacts, undervoltage releases and enclosures available

Technical specifications

Brand	Siemens
Part number / model	3RV23
Device type	Motor protection circuit breaker / manual motor starter
Poles	3P
Protection	magnetic short-circuit protection only
Rated voltage	up to 690 V AC
Standard	IEC/EN 60947-2, IEC/EN 60947-4-1

Available versions

Current Rating: 10 A / 4 kW, 12.5 A / 5.5 kW, 16 A / 7.5 kW | 3RV2311-4AC10, 16 A / 7.5 kW | 3RV2321-4AC10, 20 A / 7.5 kW, 25 A / 11 kW, 32 A / 15 kW, 40 A / 18.5 kW, 52 A / 22 kW, 65 A / 30 kW.

Typical applications

Water pumps and booster pump panels
Fans, compressors and conveyors
HVAC units and cooling towers
Machine tools and MCC panels

Selection and installation tips

Choose the setting range so that the motor full-load current (from the nameplate) lies inside it, then set the dial exactly to that current. Typical: 1.5 kW 400 V ≈ 3.5 A, 4 kW ≈ 8.5 A, 7.5 kW ≈ 15 A, 15 kW ≈ 29 A.

Frequently asked questions

Do I still need an overload relay with an MPCB?

No – a standard MPCB already includes adjustable thermal overload protection. Only magnetic-only versions need a separate overload relay.

Can an MPCB start the motor directly?

Yes, it can switch the motor manually; for remote or automatic control combine it with a contactor.

Buy Siemens 3RV23 in Egypt

Spark Egypt supplies the original Siemens 3RV23 motor protection circuit breaker (MPCB) with a VAT tax invoice for electrical contractors, panel builders, factories, consultants, retailers and maintenance teams. Delivery is available to Cairo, Giza, New Cairo, 6th of October, Sheikh Zayed, the New Administrative Capital, Alexandria, the Delta, the Canal cities and Upper Egypt. Our technical team can confirm ratings, compatible accessories and equivalent references before you order, and project quantities are quoted on request.