NAFEI ELECTRIC | CB7-125N MCB Manufacturer

General

Ambient air temperature: -5°C to +40°C, with a daily average not exceeding +35°C.
Installation altitude: no more than 2,000 m above sea level.
Relative humidity should not exceed 50% at +40°C. Higher humidity is permitted at lower temperatures when condensation is controlled.
Installation category: III.
Mount on a 35 mm DIN rail conforming to EN 60715 and TH 35-7.5 rail requirements.
Pollution degree: 3.
The mounting plane may deviate by no more than ±5° from vertical.
Install where the product is not exposed to significant impact or vibration.

Model	Shell grade current	Breaking capacity	Poles	Trip curve	Rated current
CB7-125N	125 A	6 kA	1P / 2P / 3P / 4P	C / D	63, 80, 100, 125 A

Category	Parameter	Unit	Value
Standard	Reference standard	—	IEC / EN 60947-2
Electrical features	Rated current In	A	63, 80, 100, 125
	Poles	P	1, 2, 3, 4
	Rated voltage Ue	V	230 / 400
	Insulation voltage Ui	V	500
	Rated frequency	Hz	50 / 60
	Rated breaking capacity	A	6,000
	Impulse withstand voltage Uimp	V	6,000
	Dielectric test voltage, 1 min	kV	2.5
	Thermo-magnetic release	—	C: Ii=8In / D: Ii=12In
Mechanical features	Electrical life	operations	1,500
	Mechanical life	operations	10,000
	Contact position indicator	—	Yes
	Protection degree	—	IP20
	Thermal reference temperature	°C	30
	Ambient temperature	°C	-5 to +40
	Storage temperature	°C	-25 to +70

Type	Test current	Tripping time	Expected result
C, D	1.05In	≤1 h (In≤63 A); ≤2 h (In>63 A)	Not tripping
C, D	1.3In	≤1 h (In≤63 A); ≤2 h (In>63 A)	Tripping
C, D	2.55In	1 s < t < 120 s	Tripping
C	8In × 80%	≤0.2 s	Not tripping
D	12In × 80%	≤0.2 s	Not tripping
C	8In × 120%	<0.2 s	Tripping
D	12In × 120%	<0.2 s	Tripping

Confirm final specifications and order code with our sales team before purchasing.