NB8-63 Mini Circuit Breaker

Product category:: Miniature circuit breaker (air switch)
Product code:: P-321
Model:: NB8-63

Function & Use (Application Scenarios)

Final electrical devices, small circuit breakers are mainly suitable for the terminal distribution lines of commercial office buildings, residential buildings, and general industrial applications with AC 63A, providing overload and short-circuit protection for the lines, and can also perform infrequent switching operations under normal conditions

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Product highlights

Overload protection reliable
Short-circuit protection capability
Engineering Application Compatibility
Stable and reliable operation
Easy system integration

Model

NB8-63

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Main Product Parameters

CategorySwitchgearSecondary CategoryMiniature Circuit Breaker

Product details

Function and Usage

The NB8-63 miniature circuit breaker is mainly applicable to the terminal power distribution lines of commercial office buildings, residential buildings, and general industrial applications with AC 63A, providing overload and short-circuit protection for the lines, and can also perform non-frequent switching operations under normal conditions.

Detailed Parameters

Parameter Category	Parameter Item	Parameter Value
Product Model		NB8-63
	Rated Current (A)	1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63
	Rated Voltage (V)	230/400
	Rated Frequency (Hz)	50
	Poles	1P, 1P+N, 2P, 3P, 3P+N, 4P
	Mechanical Life (Times)	20000
	Electrical Life (Times)	10000
	Rated Short-Circuit Breaking Capacity (A)	6000
	Running Short-Circuit Breaking Capacity (A)	6000
	Rated Insulation Voltage (V)	500
	Rated Impulse Withstand Voltage (1.2/50) kV	6
	Dielectric Test Voltage (V)	(50Hz, 1 minute) 2000
	Resistance to Humidity and Heat (GB/T2423.4: 55℃/90~96%, 25℃/95~100%)	28 Cycles Cycle
	Vibration Resistance (IEC/EN60068-2-6)	Places without obvious vibration and impact
Wiring Terminal	Terminal Type	Column Wiring Terminal
	Minimum Wire Cross-sectional Area (mm²)	1
	Maximum Wire Cross-sectional Area (mm²)	25
	Standard Connection Torque (N·m)	2
	Maximum Allowable Torque (N·m)	2.5
	Wire Insertion Depth (mm)	13
	Reference Temperature (℃)	30
	Operating Environmental Temperature (℃)	-35~+70
	Storage Environmental Temperature (℃)	-35~+85
	Applicable Altitude (m)	2000
	Tripping Type	Thermal-magnetic Tripping
Electromagnetic Tripping Type	B Type (3In~5In)	■
	C Type (5In~10In)	■
	D Type (10In~16In)	■
	Enclosure Flammability Rating	V0
	Wiring Method	Top and Bottom Both Possible
	Installation Method	TH35-7.5 Standard Rail
	Pollution Level	3
	Protection Level	Direct Installation IP20B
		Installation Inside Distribution Box IP40B
	Modular Accessories	S9, V9, XF9, XF9J, OVT-1, OUVT-1

Requirement confirmation

Application, rating, quantity and drawings are checked first.

Factory matching

Supplier capacity, certificates and production slot are reviewed.

Order transaction

Confirm commercial terms, sign the commercial contract, and confirm the related document checklist.

Shipment control

Packing photos, inspection records and delivery status are tracked.