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Motor protection switches

Motor protection switches, also known as manual motor starters or motor circuit breakers, are compact electromechanical devices designed to protect motors and transformers against overloads and short circuits. These devices combine a disconnecting function with thermal and magnetic protection, typically rated for currents up to 32A or higher, wi...

Motor protection switches, also known as manual motor starters or motor circuit breakers, are compact electromechanical devices designed to protect motors and transformers against overloads and short circuits. These devices combine a disconnecting function with thermal and magnetic protection, typically rated for currents up to 32A or higher, with adjustable trip settings to match motor full-load current. They feature current-limiting technology to reduce let-through energy during faults, and are available with screw, spring, or ring terminal connections for flexible wiring. Their modular design allows easy integration into control panels and distribution boards.

These switches are primarily used in industrial automation, HVAC systems, pump stations, conveyor systems, and machine tools. They are installed in motor control centers (MCCs), distribution panels, and direct-on-line starter circuits. Common applications include protecting three-phase induction motors, compressors, fans, and other rotating equipment where reliable short-circuit and overload protection is critical.

Key subcategories include the SIEMENS 3RV series, such as the 3RV2011, 3RV2021, and 3RV2031 models. These are available in different frame sizes (S0, S2, S3) covering current ranges from 0.1A to 100A. The article code typically follows the pattern 3RV20xx-xAx0, where xx indicates the frame size and current rating, and A denotes the connection type (screw, spring, or ring terminal). Other relevant codes include 3RV2411 for high-performance versions and 3RV2921 for accessories like auxiliary contacts and shunt trips.

Partnering with Electric Automation Network ensures access to genuine SIEMENS motor protection switches with real-time pricing and global express shipping. Our team of specialized engineers provides personalized technical support for selection, coordination studies, and installation guidance. Each product includes detailed documentation, datasheets, and wiring diagrams to streamline your project execution.

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Manufacturer Code Reference Catalog Number Description Delivery Price

3RV2041-4MA15

3RV2041-4MA15

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 80...100 A N-release 1300 A screw terminal Standard switching capacity with transverse auxiliary switches 1 NO+1 NC

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3RV2041-4MA10

3RV2041-4MA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 80...100 A N-release 1300 A screw terminal Standard switching capacity

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3RV2742-5HD10

3RV2742-5HD10

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Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 45 A N-release 585 A screw terminal

CIRCUIT-BREAKER, SIZE S3, FOR PLANT PROTECTION, WITH APPROVAL CIRCUIT-BREAKER UL 489, CSA C22.2 NO.5-02, A-TRIGGER 45 A, N-TRIGGER 585 A, SCREW CONNECTION,.

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3RV2742-5LD10

3RV2742-5LD10

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Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 60 A N-release 780 A screw terminal

CIRCUIT-BREAKER, SIZE S3, FOR PLANT PROTECTION, WITH APPROVAL CIRCUIT-BREAKER UL 489, CSA C22.2 NO.5-02, A-TRIGGER 60 A, N-TRIGGER 780 A, SCREW CONNECTION,.

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3RV2042-4HB10

3RV2042-4HB10

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Circuit breaker size S3 for motor protection, Class 20 A-release 36...50 A N-release 650 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 20, A-REL. 36...50A, N-REL. 650A, SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2936-2BB00-0AA4

3RV2936-2BB00-0AA4

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SIRIUS Innovations TRIGGERED. Open the DOOR. FOR DOOR P/ SWITCH AUTOM. S2, HANDLE 8UC7 BLACK PLATE INDICATOR BLACK ENROLLMENT SPECIAL EMP. HAUNI

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3RV2042-4FB10

3RV2042-4FB10

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Circuit breaker size S3 for motor protection, Class 20 A-release 28...40 A N-release 520 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 20, A-REL. 28...40 A, N-RES. 520 A, SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2042-4RA10

3RV2042-4RA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 65...84 A N-release 1170 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 65...84A, N-REL. 1170A SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2742-5QD10

3RV2742-5QD10

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Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 70 A N-release 910 A screw terminal

CIRCUIT-BREAKER, SIZE S3, FOR PLANT PROTECTION, WITH APPROVAL CIRCUIT-BREAKER UL 489, CSA C22.2 NO.5-02, A-TRIGGER 70 A, N-TRIGGER 910 A, SCREW CONNECTION,.

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3RV2041-4HA15

3RV2041-4HA15

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 36...50 A N-release 650 A screw terminal Standard switching capacity with transverse auxiliary switches 1 NO+1 NC

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 36...50A, N-REL. 650A, SCREW TERMINAL, STANDARD SWITCHING CAPACITY 1 NO + 1 NC TRANSV. AUX.

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3RV2041-4HA10

3RV2041-4HA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 36...50 A N-release 650 A screw terminal Standard switching capacity

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 36...50A, N-REL. 650A, SCREW TERMINAL, STANDARD SWITCHING CAPACITY

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3RV2031-4EA15-0BA0

3RV2031-4EA15-0BA0

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Special type Circuit breaker size S2 for motor protection, CLASS 10 A-release 22...32 A N-release 416 A screw terminal Standard switching capacity with transverse auxiliary switches 1 NO+1 NC Ambient temperature -50 °C 250 switching cycles

special type Automatic switch size S2 for motor protection, CLASS 10 Overload trigger with intensity delay 22...32 A Short circuit trigger 416 A screw terminal standard breaking power with transverse auxiliary contact block 1 NO+1 NC Ambient temperature -50 °C 250 operating cycles.

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3RV2021-4AA20-0BA0

3RV2021-4AA20-0BA0

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Special type Circuit breaker size S0 for motor protection, CLASS 10 A-release 10...16 A N-release 208 A Spring-type terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles

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3RV2341-4KC10

3RV2341-4KC10

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Circuit breaker size S3 for starter combination Rated current 75 A N-release 975 A screw terminal Standard switching capacity

CIRCUIT-BREAKER SIZE S3, FOR STARTER COMBINATION, RATED CURRENT 75A, N-REL. 975A, SCREW TERMINAL, STANDARD SWITCHING CAPACITY.

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3RV2946-2BB00-0AA4

3RV2946-2BB00-0AA4

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SIRIUS Innovations TRIGGERED. Open the DOOR. FOR DOOR P/ SWITCH AUTOM. S3, HANDLE 8UC7 BLACK, rating PLATE BLACK, INSCRIPTION SPECIAL EMP. HAUNI

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3RV2142-4YA10

3RV2142-4YA10

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Circuit breaker size S3 for motor protection CLASS 10 with overload relay function A-release 75...93 A N-release 1300 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, WITH OVERLOAD RELAY FUNCTION A-REL. 75...93A,N-REL. 1300A SCREW CONNECTION INCREASED BREAKING CAPACITY

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3RV2742-5FD10

3RV2742-5FD10

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Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 35 A N-release 455 A screw terminal

CIRCUIT-BREAKER, SIZE S3, FOR PLANT PROTECTION, WITH APPROVAL CIRCUIT-BREAKER UL 489, CSA C22.2 NO.5-02, A-TRIGGER 35 A, N-TRIGGER 455 A, SCREW CONNECTION,.

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3RV2342-4RC10

3RV2342-4RC10

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Circuit breaker size S3 for starter combination Rated current 84 A N-release 1170 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR STARTER COMBINATION, RATED CURRENT 84A, N-REL.1170A SCREW TERMINAL, INCREASED BREAKING CAP. 100KA

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3RV2021-1KA20-0BA0

3RV2021-1KA20-0BA0

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Special type Circuit breaker size S0 for motor protection, CLASS 10 A-release 9...12 A N-release 163 A Spring-type terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles

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3RV2031-4JA10-0BA0

3RV2031-4JA10-0BA0

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Special type Circuit breaker size S2 for motor protection, CLASS 10 A-release 54...65 A N-release 845 A screw terminal Standard switching capacity Ambient temperature -50 °C 250 switching cycles

special type Automatic switch size S2 for motor protection, CLASS 10 Overload trigger with delay according to intensity 54...65 A Short circuit trigger 845 A screw terminal standard breaking power Ambient temperature -50 °C 250 switching cycles.

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3RV2742-5DD10

3RV2742-5DD10

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Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 25 A N-release 325 A screw terminal

CIRCUIT-BREAKER, SIZE S3, FOR PLANT PROTECTION, WITH APPROVAL CIRCUIT-BREAKER UL 489, CSA C22.2 NO.5-02, A-TRIGGER 25 A, N-TRIGGER 325 A, SCREW CONNECTION,.

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3RV2142-4HA10

3RV2142-4HA10

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Circuit breaker size S3 for motor protection CLASS 10 with overload relay function A-release 36...50 A N-release 650 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, WITH OVERLOAD RELAY FUNCTION A-REL. 36...50A, N-REL. 650A, SCREW CONNECTION, INCREASED BREAKING CAPACITY.

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3RV2042-4JA10

3RV2042-4JA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 45...63 A N-release 819 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 45...63A, N-REL. 819A, SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2041-4KA15

3RV2041-4KA15

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 57...75 A N-release 975 A screw terminal Standard switching capacity with transverse auxiliary switches 1 NO+1 NC

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3RV2042-4FA10

3RV2042-4FA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 28...40 A N-release 520 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 28...40 A, N-RES. 520 A, SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2042-4YA10

3RV2042-4YA10

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Circuit breaker size S3 for motor protection, CLASS 10 A-release 75...93 A N-release 1300 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR MOTOR PROTECTION, CLASS 10, A-REL. 75...93A,N-REL. 1300A SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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3RV2342-4HC10

3RV2342-4HC10

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Circuit breaker size S3 for starter combination Rated current 50 A N-release 650 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR STARTER COMBINATION, RATED CURRENT 50A, N-REL. 650A, SCREW TERMINAL, INCREASED BREAKING CAP. 100KA

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3RV2031-4TB15

3RV2031-4TB15

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Circuit breaker size S2 for motor protection class 20 A-release 12...17 A N-release 260 A screw terminal Standard switching capacity with transverse auxiliary switch 1 NO+1 NC

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3RV2341-4HC10

3RV2341-4HC10

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Circuit breaker size S3 for starter combination Rated current 50 A N-release 650 A screw terminal Standard switching capacity

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3RV2342-4YC10

3RV2342-4YC10

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Circuit breaker size S3 for starter combination Rated current 93 A N-release 1300 A screw terminal Increased switching capacity 100 kA

CIRCUIT-BREAKER SIZE S3, FOR STARTER COMBINATION, RATED CURRENT 93A, N-REL.1300A SCREW TERMINAL, INCREASED BREAKING CAP. 100KA.

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