MCB 63A 3 Pole

Where Is a 3 Pole 63A MCB Used?

A 3 pole 63A MCB is commonly used in 3-phase AC distribution systems where three live conductors need to be protected and disconnected together. It is suitable for motors, compressors, HVAC systems, pumps, workshops, commercial buildings, small industrial machines, and distribution panels requiring 63A circuit protection.

3-Pole 63A Protection

Wide Compatibility: Ideal for 3-phase systems (230V/400V) in factories, workshops, and high-rise buildings.

Adjustable Trip Curves: Choose B, C, or D curves for tailored protection of motors, transformers, or lighting circuits.

Ultra-Durable Design

Extended Lifespan: 20,000 mechanical cycles and 10,000 electrical operations for long-term reliability.

Temperature Resilience: Stable performance in environments from -5°C to +40°C (see temperature derating table).

Easy Installation & Use

DIN Rail Mounting: Quick clip-on installation compatible with standard 35mm DIN rails (EN 60715).

Clear Status Indicators: Ergonomically designed handle for smooth operation and visual feedback.

Selection

YCB7	-	63	N	1P	C	16
Model		Shell grade current	Breaking capacity	Number of poles	Tripping characteristics	Rated curren
Miniatur circuit breaker e		63	N:6kA	1P 2P 3P 4P	B C D	1 2 4 6 10 16 20 25 32 40 50 63 80

Note:This product can be assembled with accessories(YCB7-63N  OF/SD/OF+SD/ MX/ MVMN/MX+OF, etc)

Technical data

Type	Standard			IEC/EN 60898-1
Comprehensive data	Function			Overload, Short circuit, Isolation
	Number of poles			1P,2P,3P,4P
	Rated current In		A	1-63A
	Rated frequency		Hz	50/60Hz
Electrical features	Rated voltage Ue		V	230/400
	Rated insulation voltage Ui		V	500
	Rated breaking capacity Icn		A	6000
	Rated impulse withstand voltage Uimp(1.2/50）		kA	4
	Pollution degree			2
	Use category			II、III
	Trip type			Thermal magnetic release
	Thermal magnetic tripping characteristics			B,C,D
	Electrical and mechanical accessories			口
Mechanical features	Mechanical life		Times	20000
	Electrical life		Times	10000
	Protection degree			IP20
	Antihumidity and heat resistance			The relative humidity of the air is not more than 50% when the ambient air temperature is +40°C, and it can have a higher relative humidity at a lower temperature
	Reference ambient temperature		°C	30
	Ambient temperature		°C	-5°C-+40°C, the average value of 24h does not exceed +35°C
	Height		m	Not exceeding 2000
Installation	Terminal connection type			Cable/Pin-type busbar
	Maximum wire capacity	Terminal size	mm²	25
		top/bottom for cable	AWG	18-3
		Terminal size	mm²	25
		top/bottom for busbar	AWG	18-3
	Torque		N*m	2
			In-lbs	18
	Tool		18	Phillips screwdriver or flat-blade screwdriver
	Installation			On DIN rail EN 60715 (35mm) by means of fast clip device
	Wiring method			From top or bottom

Applications

Industrial Equipment: Protect motors, compressors, and CNC machines.

Commercial Buildings: Safeguard HVAC systems, elevators, and lighting panels.

Residential Use: Ideal for high-power appliances in apartments or villas.

Why Choose YCB7-63N MCB 63A?

Cost-Effective Safety: Competitive 3 pole MCB 63A price for premium-grade protection.

Future-Proof Flexibility: Adjustable trip curves and wide current range (1A–63A).

Global Trust: Meets IEC/EN standards, ensuring compliance and reliability worldwide.

Overall and mounting dimensions(mm)

Selection

Type	Test current	Tripping time	Expected result		Type	Test current	Tripping time	Expected result
B,C,D	1.13In	t≤1h(In≤63A)	Not tripping		B	3In	t≤0.1s	Not tripping
	1.13In	t≤2h(In>63A)			C	5In	t≤0.1s
B,C,D	1.45In	t<1h(In≤63A)	Tripping		D	10In	t≤0.1s
	1.45In	t<2h(In>63A)			B	5In	t＜0.1s	Tripping
B,C,D	2.55In	1s<t<60s(In≤32A)	Tripping		C	10In	t＜0.1s
	2.55In	1s<t<120s(In>32A)			D	20In	t＜0.1s

 

How to Choose B Curve, C Curve, and D Curve MCBs?

Trip Curve	Tripping Range	Recommended Applications
B Curve	3–5 × In	Lighting circuits, resistive loads, residential distribution
C Curve	5–10 × In	Motors, pumps, HVAC, commercial equipment
D Curve	10–20 × In	High inrush equipment, transformers, industrial machinery

Curve

FAQs

Q1: What’s the difference between B, C, and D curves?

A1:

B Curve: For resistive loads (lighting, sockets).

C Curve: For moderate inrush currents (motors, transformers).

D Curve: For high inrush currents (industrial machinery).

 

Q2: Can this MCB handle voltage fluctuations?

A2: Yes! Its 6000A breaking capacity ensures stability even during severe short circuits.

 

Q3: Is it suitable for residential 3-phase systems?

A3: Absolutely. The 3-pole MCB 63A is perfect for homes with high-power AC units or EV chargers.

 

Q4: What is a 3 pole MCB used for?
A4: pole MCB is used to protect and disconnect three-phase circuits. It is commonly used in motors, HVAC systems, pumps, workshops, commercial buildings, and industrial distribution panels.

 

Q5: What is the difference between 3 pole MCB and 4 pole MCB?
A5: pole MCB protects three live conductors, while a 4 pole MCB protects three live conductors plus the neutral conductor. A 4 pole MCB is used when neutral isolation is required.

 

Q6: Is a 63A 3 pole MCB suitable for motor protection?
A6: 3A 3 pole MCB can be used for motor circuits when the rated current, starting current, trip curve, and short-circuit capacity match the system requirements. For motors with moderate or high inrush current, C curve or D curve may be selected.

 

Q7: What does 6kA breaking capacity mean?
A7: 6kA breaking capacity means the MCB can safely interrupt short-circuit current up to 6000A under specified conditions.

 

Q8: Can this 3 pole MCB be installed on a DIN rail?
A8: Yes. The YCB7-63N 3 pole MCB supports standard 35mm DIN rail installation and top or bottom wiring.