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Tertiary circuit breakers from 6 kA

Tertiary circuit breakers, also known as miniature circuit breakers (MCBs) or branch circuit breakers, are designed for overcurrent and short-circuit protection in final distribution circuits. These devices are available in 1-pole, 1+N-pole, 2-pole, 3-pole, and 3+N-pole configurations, with rated currents from 1 A to 63 A and breaking capacities...

Tertiary circuit breakers, also known as miniature circuit breakers (MCBs) or branch circuit breakers, are designed for overcurrent and short-circuit protection in final distribution circuits. These devices are available in 1-pole, 1+N-pole, 2-pole, 3-pole, and 3+N-pole configurations, with rated currents from 1 A to 63 A and breaking capacities of 6 kA or 10 kA according to IEC 60898. They feature B, C, and D tripping curves to match different load types, with B curve for resistive loads, C for inductive loads, and D for high-inrush loads like motors and transformers. Operating voltages range from 230 V to 400 V, and models are available with 70 mm DIN rail mounting depth for standard distribution boards.

These circuit breakers are primarily installed in tertiary sector applications such as commercial buildings, office complexes, hotels, hospitals, schools, and retail spaces. They are used in final distribution boards, lighting circuits, socket outlets, HVAC systems, and small power distribution within electrical panels. Their compact design makes them ideal for modular enclosures and sub-distribution units where space is limited but reliable protection is essential.

All products in this category comply with IEC 60898-1 and EN 60898-1 standards for miniature circuit breakers, ensuring consistent performance across installations. Selected models also meet UL 489 requirements for North American applications, providing dual-certification flexibility. These breakers are fully compatible with Siemens 5SL, 5SY, and 5SJ series accessories, including auxiliary contacts, shunt trips, undervoltage releases, and busbar systems for simplified wiring in distribution boards.

At Electric Automation Network, we offer these tertiary circuit breakers with real-time pricing and stock availability on our multilingual portal. Our engineering team provides personalized technical support to help you select the correct breaking capacity, pole configuration, and tripping curve for your specific installation. We ship express worldwide, ensuring your critical components arrive on time for any project deadline.

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Manufacturer Code Reference Catalog Number Description Delivery Price

5SY6204-7

5SY6204-7

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Miniature circuit breaker 400 V 6kA, 2-pole, C, 4A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, C curve, 2 poles, 4A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6603-7

5SY6603-7

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

Circuit breaker, 70mm, accessable, 6kA, curve C, 3 poles+N, 3A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4113-8HG40

5SJ4113-8HG40

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Miniature circuit breaker 240 V 14kA, 1-pole, D, 13 A, D=70 mm according to UL 489, equal polarity

INTERR. SELECT PROTECTION. 240V 14KA, 1POLO, D, 13A, P=70MM SEGUN UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4113-8HG41

5SJ4113-8HG41

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Miniature circuit breaker 240 V 14kA, 1-pole, D, 13 A, D=70 mm according to UL 489

INTERR. SELECT PROTECTION. 240V 14KA, 1POLO, D, 13A, P=70MM ACCORDING TO UL 489, SAME POLARITY. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4113-8HG42

5SJ4113-8HG42

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Circuit breaker 10kA, 1-pole, D, 13A according to UL 489-277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 1 POLE, D, 13 A SEGUN UL 489 - 277 V. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL4103-7

5SL4103-7

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Miniature circuit breaker 230/400 V 10kA, 1-pole, C, 3A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 1 pole, 3A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4140-6HG40

5SJ4140-6HG40

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Miniature circuit breaker 240 V 14kA, 1-pole, B, 40A, D=70 mm according to UL 489, equal polarity

INTERR. SELECT PROTECTION. 240V 14KA, 1polo, B, 40A, P=70MM ACCORDING TO UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SL4450-8

5SL4450-8

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Miniature circuit breaker 400 V 10kA, 4-pole, D, 50 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, D-curve, 4-pole, 50A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4335-7HG42

5SJ4335-7HG42

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Circuit breaker 10kA, 3-pole, C, 35A according to UL 489-480Y/277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 3 POLES, C, 35A ACCORDING TO UL 489 - 480Y/277V. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SJ4132-7HG42

5SJ4132-7HG42

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Circuit breaker 10kA, 1-pole, C, 32A according to UL 489-277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 1 POLE, C, 32A ACCORDING TO UL 489 - 277 V. Manufactured to order without possibility of return or cancellation.

 		3 View Availability View Price

5SJ4132-7HG40

5SJ4132-7HG40

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Miniature circuit breaker 240 V 14kA, 1-pole, C, 32 A, D=70 mm according to UL 489, equal polarity

INTERR. SELECT PROTECTION. 240V 14KA, 1pole, C, 32A, P=70MM ACCORDING TO UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY6502-7

5SY6502-7

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Miniature circuit breaker 230 V 6kA, 1+N-pole C, 2A, D=70 mm

Circuit breaker, 70mm, accessable, 6kA, curve C, 1 pole+N, 2A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6350-7

5SY6350-7

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Miniature circuit breaker 400 V 6kA, 3-pole, C, 50 A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 3 poles, 50A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4501-8

5SL4501-8

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Miniature circuit breaker 230 V 10kA, 1+N-pole, D, 1 A

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

 		3 View Availability View Price

5SL4102-7

5SL4102-7

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Miniature circuit breaker 230/400 V 10kA, 1-pole, C, 2A

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

 		3 View Availability View Price

5SL4102-6

5SL4102-6

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Miniature circuit breaker 230/400 V 10kA, 1-pole, B, 2A

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

 		3 View Availability View Price

5SL4501-6

5SL4501-6

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Miniature circuit breaker 230 V 10kA, 1+N-pole, B, 1A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve B, 1 pole+N, 1A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4501-7

5SL4501-7

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Miniature circuit breaker 230 V 10kA, 1+N-pole, C, 1 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 1 pole+N, 1A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6625-7

5SY6625-7

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Miniature circuit breaker 400 V 6kA, 3+N-pole C, 25A, D=70 mm

Circuit breaker, 70mm, accessable, 6kA, curve C, 3 poles+N, 25A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SL4563-7

5SL4563-7

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Miniature circuit breaker 230 V 10kA, 1+N-pole, C, 63 A

Circuit breaker, 70mm, accessory 5SL4, 10kA, curve C, 1 pole+N, 63A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6111-7

5SY6111-7

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Miniature circuit breaker 230/400 V 6kA, 1-pole, C, 5 A

CIRCUIT BREAKER 230/400V 6KA, 1POLE, C, 5A. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY6408-7

5SY6408-7

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Miniature circuit breaker 400 V 6kA, 4-pole, C, 8A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 4 poles, 8A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6110-7

5SY6110-7

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Miniature circuit breaker 230/400 V 6kA, 1-pole, C, 10A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 1 pole, 10A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4140-7HG42

5SJ4140-7HG42

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Circuit breaker 10kA, 1-pole, C, 40 A according to UL 489-277V

AUTOMATIC MAGNETOTHERMIC 10 KA, 1 POLE, C, 40A ACCORDING TO UL 489 - 277 V. Manufactured to order without possibility of return or cancellation.

 		3 View Availability View Price

5SJ4140-7HG41

5SJ4140-7HG41

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Miniature circuit breaker 240 V 14kA, 1-pole, C, 40A, D=70 mm according to UL 489

INTERR. SELECT PROTECTION. 240V 14KA, 1pole, C, 40A, P=70MM ACCORDING TO UL 489. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SJ4140-7HG40

5SJ4140-7HG40

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Miniature circuit breaker 240 V 14kA, 1-pole, C, 40A, D=70 mm according to UL 489, equal polarity

INTERR. SELECT PROTECTION. 240V 14KA, 1pole, C, 40A, P=70MM ACCORDING TO UL 489. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

5SY6308-7

5SY6308-7

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Miniature circuit breaker 400 V 6kA, 3-pole, C, 8A, D=70 mm

INTERR. SELECT PROTECTION. 400V 6KA, 3POLOS, C, 8A, T=70MM. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6101-7

5SY6101-7

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Miniature circuit breaker 230/400 V 6kA, 1-pole, C, 1A, D=70 mm

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

 		3 View Availability View Price

5SY6316-7

5SY6316-7

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Miniature circuit breaker 400 V 6kA, 3-pole, C, 16A, D=70 mm

Circuit breaker, 70mm, accessory, 6kA, curve C, 3 poles, 16A. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

5SY6510-6

5SY6510-6

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Miniature circuit breaker 230 V 6kA, 1+N-pole B, 10A, D=70 mm

INTERR. SELECT PROTECTION. 230V 6KA,1+N-POLES B, 10A, P=70MM. Cancelations and returns limited. Consult conditions.

 		3 View Availability View Price

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