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Miniature circuit breaker (MCB)

Miniature circuit breakers (MCBs), also known as miniature circuit breakers, compact circuit breakers, or simply MCBs, are essential overcurrent protection devices designed for low-voltage electrical installations. These devices automatically interrupt the circuit when a fault condition such as overload or short circuit is detected, protecting w...

Miniature circuit breakers (MCBs), also known as miniature circuit breakers, compact circuit breakers, or simply MCBs, are essential overcurrent protection devices designed for low-voltage electrical installations. These devices automatically interrupt the circuit when a fault condition such as overload or short circuit is detected, protecting wiring and connected equipment. MCBs are characterized by their rated current (amperage), number of poles (1P, 2P, 3P, 4P), breaking capacity (kA), and trip curves (B, C, D, K, Z). They are typically rated for voltages up to 240/415 V AC and 48-125 V DC, with rated currents ranging from 0.5 A to 125 A. Common mounting types include DIN rail (EN 60715) and plug-in modules, with accessories like auxiliary contacts, shunt trips, and undervoltage releases available for enhanced functionality. In different regions, they are referred to as MCBs, miniature circuit breakers, or compact circuit breakers.

MCBs are widely used in residential, commercial, and industrial electrical distribution panels, control cabinets, and automation systems. They protect lighting circuits, socket outlets, motor circuits, and sensitive electronic equipment. Typical installation environments include main distribution boards (MDBs), sub-distribution boards (SDBs), and final distribution boards in buildings, factories, and infrastructure projects. They are also employed in renewable energy systems, such as solar photovoltaic arrays and wind turbine control panels, as well as in HVAC systems, elevators, and data centers.

Our category includes a comprehensive range of MCBs from leading manufacturers. Key subcategories include single-pole (1P) MCBs, double-pole (2P) MCBs, three-pole (3P) MCBs, and four-pole (4P) MCBs, each available in various trip curves (B, C, D) and breaking capacities (e.g., 6 kA, 10 kA, 15 kA, 25 kA). Common article codes follow patterns like MCB-1P-C16-6kA or MCB-3P-D32-10kA, where the code indicates poles, curve, rated current, and breaking capacity. We also stock specialized MCBs for DC applications, such as MCB-2P-DC-63A-10kA, and compact MCBs for modular installations.

Partnering with Electric Automation Network ensures access to genuine, certified MCBs with real-time pricing and global express shipping. Our team of specialized electrical engineers provides personalized technical support, helping you select the correct MCB based on your system's voltage, current, fault level, and coordination requirements. We offer detailed technical documentation for each article, including datasheets, wiring diagrams, and compliance certificates (IEC 60898, IEC 60947-2). Whether you need a single unit for a repair or bulk quantities for a large project, we deliver fast and reliably worldwide.

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Manufacturer Code Reference Catalog Number Description Delivery Price

5SY7304-8

5SY7304-8

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Miniature circuit breaker 400 V 15kA, 3-pole, D, 4A, D=70 mm

Accessable circuit breaker, 15kA, curve D, 3 poles, 4A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY7304-7

5SY7304-7

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Miniature circuit breaker 400 V 15kA, 3-pole, C, 4A, D=70 mm

Accessable circuit breaker, 15kA, curve C, 3 poles, 4A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY5408-7

5SY5408-7

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Circuit breaker Universal current 880 V DC 400 V AC 10kA, 4-pole, C, 8A max. 1000 V DC

Universal circuit breaker AC-DC 880V DC; 400V AC 10KA, 4pole, C, 8A MAX. DC 1000V. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4145-8HG41

5SJ4145-8HG41

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Miniature circuit breaker 240 V 10kA, 1-pole, D, 45 A, D=70 mm according to UL 489

INTERR. SELECT PROTECTION. 240V 10KA, 1POLO, D, 45A, P=70MM ACCORDING TO UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL4602-7

5SL4602-7

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Miniature circuit breaker 400 V 10kA, 3+N-pole, C, 2A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 3 poles+N, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4602-8

5SL4602-8

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Miniature circuit breaker 400 V 10kA, 3+N-pole, D, 2A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve D, 3 poles+N, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4201-8

5SL4201-8

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Miniature circuit breaker 400 V 10kA, 2-pole, D, 1 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, D-curve, 2-pole, 1A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6403-7

5SY6403-7

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Miniature circuit breaker 400 V 6kA, 4-pole, C, 3 A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 4 poles, 3A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6213-7

5SY6213-7

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Miniature circuit breaker 400 V 6kA, 2-pole, C, 13 A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 2 poles, 13A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY7606-8

5SY7606-8

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Miniature circuit breaker 400 V 15kA, 3+N-pole, D, 6 A, D=70 mm

Accessable circuit breaker, 15kA, curve D, 3 poles+N, 6A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL4363-6

5SL4363-6

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Miniature circuit breaker 400 V 10kA, 3-pole, B, 63 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve B, 3 poles, 63A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4363-7

5SL4363-7

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Miniature circuit breaker 400 V 10kA, 3-pole, C, 63 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 3 poles, 63A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY8103-7

5SY8103-7

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Circuit breaker 230/400 V D=70 mm 25 kA according to EN 60947-2, 1P, C3

Int aut acces 70mm 25kA 1pole C-3A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY7463-7

5SY7463-7

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Miniature circuit breaker 400 V 15kA, 4-pole, C, 63 A, D=70 mm

Accessory circuit breaker, 15kA, C-curve, 4-pole, 63A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4135-7HG40

5SJ4135-7HG40

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Miniature circuit breaker 240 V 14kA, 1-pole, C, 35 A, D=70 mm according to UL 489, equal polarity

INTERR. SELECT PROTECTION. 240V 14KA, 1POLO, C, 35A, P=70MM ACCORDING TO UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY4202-5

5SY4202-5

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Miniature circuit breaker 400 V 10kA, 2-pole, A, 2A, D=70 mm

Circuit breaker, 70mm, accessory, 10kA, curve A, 2 poles, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY4202-8

5SY4202-8

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Miniature circuit breaker 400 V 10kA, 2-pole, D, 2A, D=70 mm

Circuit breaker, 70mm, accessory, 10kA, curve D, 2 poles, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY7214-7

5SY7214-7

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Miniature circuit breaker 400 V 15kA, 2-pole, C, 0.3A, D=70 mm

Accessable circuit breaker, 15kA, curve C, 2 poles, 0.3A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY4620-8

5SY4620-8

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Miniature circuit breaker 400 V 10kA, 3+N-pole, D, 20 A, D=70 mm

Circuit breaker, 70mm, accessory, 10kA, D curve, 3 poles+N, 20A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4316-8HG42

5SJ4316-8HG42

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Circuit breaker 10kA, 3-pole, D, 16A according to UL 489-480Y/277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 3 POLES, D, 16A ACCORDING TO UL 489 - 480Y/277V. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL4632-7

5SL4632-7

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Miniature circuit breaker 400 V 10kA, 3+N-pole, C, 32 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 3 poles+N, 32A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL6532-6

5SL6532-6

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Miniature circuit breaker 230 V 6kA, 1+N-pole, B, 32 A

Circuit Breaker 70mm, 6kA, curve B, 1 pole+N, 32A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL6320-7

5SL6320-7

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Miniature circuit breaker 400 V 6kA, 3-pole, C, 20 A

Circuit Breaker 70mm, 6kA, curve C, 3 poles, 20A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4663-8

5SL4663-8

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Miniature circuit breaker 400 V 10kA, 3+N-pole, D, 63 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve D, 3 poles+N, 63A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY8213-7

5SY8213-7

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Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 2P, C13

Int aut acces 70mm 25kA 2poles C-13A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4125-7HG42

5SJ4125-7HG42

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Circuit breaker 10kA, 1-pole, C, 25A according to UL 489-277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 1 POLE, C, 25A SEGUN UL 489 - 277 V. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL6540-7

5SL6540-7

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Miniature circuit breaker 230 V 6kA, 1+N-pole, C, 40 A

Circuit Breaker 70mm, 6kA, curve C, 1 pole+N, 40A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL6120-7

5SL6120-7

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Miniature circuit breaker 230/400 V 6kA, 1-pole, C, 20 A

Circuit breaker 70mm, 6kA, C curve, 1 pole, 20A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL6120-6

5SL6120-6

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Miniature circuit breaker 230/400 V 6kA, 1-pole, B, 20 A

Circuit breaker 70mm, 6kA, B curve, 1 pole, 20A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4302-8

5SL4302-8

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Miniature circuit breaker 400 V 10kA, 3-pole, D, 2A

Circuit breaker, 70mm, accessory 5SL4, 10kA, D curve, 3 poles, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

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