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Miniature and residual circuit breakers

Miniature and Residual Circuit Breakers – Technical Overview

Miniature circuit breakers (MCBs) and residual current devices (RCDs) are fundamental components for overcurrent and earth fault protection in low-voltage electrical installations. Lovato Electric offers a comprehensive range of these devices, including MCBs rated up to 125A, combined s...

Miniature and Residual Circuit Breakers – Technical Overview

Miniature circuit breakers (MCBs) and residual current devices (RCDs) are fundamental components for overcurrent and earth fault protection in low-voltage electrical installations. Lovato Electric offers a comprehensive range of these devices, including MCBs rated up to 125A, combined switch-disconnectors, and residual current circuit breakers (RCCBs). All units feature a high breaking capacity of up to 10kA, ensuring reliable fault interruption. The MCBs are available with tripping curves B, C, and D, allowing precise coordination with various load types—from resistive to highly inductive circuits. Many models carry UL approval, making them suitable for North American installations. Key technical parameters include rated voltage up to 400V AC, number of poles (1P, 2P, 3P, 4P), and rated residual operating currents (IΔn) for RCDs, typically 30mA, 100mA, or 300mA for personnel and fire protection.

Applications and Sectors

These circuit breakers are deployed in residential, commercial, and industrial distribution boards, as well as in motor control centers and automation panels. They are ideal for protecting lighting circuits, socket outlets, HVAC equipment, and small machinery. In industrial environments, they serve as backup protection for contactors and motor starters, ensuring compliance with IEC 60947-2 and IEC 61008 standards. Their compact design facilitates installation in modular enclosures, while the high breaking capacity suits systems with high prospective short-circuit currents.

Subcategories and Key Articles

The main subcategories include: miniature circuit breakers (MCBs) like the LO320 series, residual current circuit breakers (RCCBs) such as the LO330 series, and combined RCBOs (residual current breakers with overcurrent protection) like the LO340 series. Article codes typically follow a pattern: e.g., LO320-1P-B16 for a single-pole, 16A, curve B MCB, or LO330-2P-30mA for a two-pole, 30mA RCCB. Other variants include LO320-3P-C32 and LO330-4P-300mA. These codes encode the number of poles, rated current, tripping curve, and residual sensitivity.

Business Benefits and Support

Electric Automation Network provides express worldwide shipping and personalized technical support from specialized engineers. We offer real-time pricing, detailed technical documentation for each article, and multilingual assistance. Our inventory ensures fast delivery for urgent projects, while our engineering team helps select the right devices for your specific application, ensuring compliance and optimal protection.

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Manufacturer Code Reference Catalog Number Description Delivery Price

P1MB1MB06

P1MB1MB06

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 6A

MINIATURE CIRCUIT BREAKER 1P+N B 6A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 6A

 		3 View Availability View Price

P1MB1MB16

P1MB1MB16

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 16A

MINIATURE CIRCUIT BREAKER 1P+N B 16A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 16A

 		3 View Availability View Price

P1MB1MB20

P1MB1MB20

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 20A

MINIATURE CIRCUIT BREAKER 1P+N B 20A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 20A

 		3 View Availability View Price

P1MB1MB25

P1MB1MB25

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 25A

MINIATURE CIRCUIT BREAKER 1P+N B 25A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 25A

 		3 View Availability View Price

P1MB1MB32

P1MB1MB32

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 32A

MINIATURE CIRCUIT BREAKER 1P+N B 32A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 32A

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P1MB1MC02

P1MB1MC02

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 2A

MINIATURE CIRCUIT BREAKER 1P+N C 2A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 2A

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P1MB1MB10

P1MB1MB10

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC B, 10A

MINIATURE CIRCUIT BREAKER 1P+N B 10A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic B, 10A

 		3 View Availability View Price

P1MB1MC04

P1MB1MC04

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 4A

MINIATURE CIRCUIT BREAKER 1P+N C 4A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 4A

 		2 View Availability View Price

P1MB1MC06

P1MB1MC06

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 6A

MINIATURE CIRCUIT BREAKER 1P+N C 6A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 6A

 		0 Stock Available View Price

P1MB1MC13

P1MB1MC13

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 13A

MINIATURE CIRCUIT BREAKER 1P+N C 13A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 13A

 		3 View Availability View Price

P1MB1MC16

P1MB1MC16

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 16A

MINIATURE CIRCUIT BREAKER 1P+N C 16A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 16A

 		0 Stock Available View Price

P1MB1MC20

P1MB1MC20

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 20A

MINIATURE CIRCUIT BREAKER 1P+N C 20A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 20A

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P1MB1MC32

P1MB1MC32

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 32A

MINIATURE CIRCUIT BREAKER 1P+N C 32A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 32A

 		2 View Availability View Price

P1MB1MC40

P1MB1MC40

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 40A

MINIATURE CIRCUIT BREAKER 1P+N C 40A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 40A

 		3 View Availability View Price

P1MB1MC25

P1MB1MC25

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 25A

MINIATURE CIRCUIT BREAKER 1P+N C 25A 6KA

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 25A

 		0 Stock Available View Price

P1MB1MC10

P1MB1MC10

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MINIATURE CIRCUIT BREAKER, 1P+N - 6KA. 1 MODULE, CHARACTERISTIC C, 10A

MINIATURE CIRCUIT BREAKER 1P+N C 10A

Miniature circuit breaker, 1P+N - 6kA. 1 module, characteristic C, 10A

 		0 Stock Available View Price

P1MB1PB01

P1MB1PB01

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC B, 1A

MINIATURE CIRCUIT BREAKER 1P B 1A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic B, 1A

 		3 View Availability View Price

P1MB1PB02

P1MB1PB02

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC B, 2A

MINIATURE CIRCUIT BREAKER 1P B 2A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic B, 2A

 		3 View Availability View Price

P1MB1PB04

P1MB1PB04

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC B, 4A

MINIATURE CIRCUIT BREAKER 1P B 4A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic B, 4A

 		3 View Availability View Price

P1MB1PB13

P1MB1PB13

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC B, 13A

MINIATURE CIRCUIT BREAKER 1P B 13A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic B, 13A

 		3 View Availability View Price

P1MB1PC13

P1MB1PC13

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC C, 13A

MINIATURE CIRCUIT BREAKER 1P C 13A 10KA

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P1MB1PD13

P1MB1PD13

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC D, 13A

MINIATURE CIRCUIT BREAKER 1P D 13A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic D, 13A

 		3 View Availability View Price

P1MB1PD40

P1MB1PD40

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC D, 40A

MINIATURE CIRCUIT BREAKER 1P D 40A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic D, 40A

 		2 View Availability View Price

P1MB1PD50

P1MB1PD50

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC D, 50A

MINIATURE CIRCUIT BREAKER 1P D 50A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic D, 50A

 		3 View Availability View Price

P1MB1PD63

P1MB1PD63

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC D, 63A

MINIATURE CIRCUIT BREAKER 1P D 63A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic D, 63A

 		3 View Availability View Price

P1MB2PB02

P1MB2PB02

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MINIATURE CIRCUIT BREAKER, 2P - 10KA. 2 MODULES, CHARACTERISTIC B, 2A

MINIATURE CIRCUIT BREAKER 2P B 2A 10KA

Miniature circuit breaker, 2P - 10kA. 2 modules, characteristic B, 2A

 		2 View Availability View Price

P1MB1PD01

P1MB1PD01

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MINIATURE CIRCUIT BREAKER, 1P - 10KA. 1 MODULE, CHARACTERISTIC D, 1A

MINIATURE CIRCUIT BREAKER 1P D 1A 10KA

Miniature circuit breaker, 1P - 10kA. 1 module, characteristic D, 1A

 		2 View Availability View Price

P1MB2PB01

P1MB2PB01

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MINIATURE CIRCUIT BREAKER, 2P - 10KA. 2 MODULES, CHARACTERISTIC B, 1A

MINIATURE CIRCUIT BREAKER 2P B 1A 10KA

Miniature circuit breaker, 2P - 10kA. 2 modules, characteristic B, 1A

 		3 View Availability View Price

P1MB2PB04

P1MB2PB04

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MINIATURE CIRCUIT BREAKER, 2P - 10KA. 2 MODULES, CHARACTERISTIC B, 4A

MINIATURE CIRCUIT BREAKER 2P B 4A 10KA

Miniature circuit breaker, 2P - 10kA. 2 modules, characteristic B, 4A

 		3 View Availability View Price

P1MB2PB13

P1MB2PB13

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MINIATURE CIRCUIT BREAKER, 2P - 10KA. 2 MODULES, CHARACTERISTIC B, 13A

MINIATURE CIRCUIT BREAKER 2P B 13A 10KA

Miniature circuit breaker, 2P - 10kA. 2 modules, characteristic B, 13A

 		3 View Availability View Price

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