The Hager 4P 10A B-curve MCB (4M) provides reliable overload and short-circuit protection for 3-phase+N circuits up to 415 V AC. High breaking capacity: Icu 25 kA (230/400 V), Ics 7.5 kA, Icn 10 kA. B-curve suits resistive/light inductive loads. Screw/biconnect terminals accept 1-35 mm² (2.8 Nm). IP20, 6 kV impulse, −25 to 70 °C. Durable: 4,000 electrical and 20,000 mechanical operations. Ideal for residential/commercial use.

EAN

3250614645891

Packaging

1 Piece

MCB 4P 40A Curve B 20kA Icu 415V AC 4 Modules NQN410

Phase out product: please contact your electrical wholesaler for availability

Accessories
Technical properties
Environmental value
Documentations

Complete your system

Modular phase busbar 1 products available
Terminal cover 1 products available
AOB type A-HI 3 products available
AOB type AC 6 products available
AOB type AC/A-SEL 1 products available

Technical properties

Rated current IN

10 A
Rated service breaking capacity Ics under 230 V AC according to IEC 60947-2

15 kA
Rated ultimate short-circuit breaking capacity Icu AC IEC 60947-2

25 kA
Rated ultimate short-circuit breaking capacity Icu under 400 V AC IEC 60947-2

25 kA
Rated current at -15°C

12.31 A
Rated current at -10°C

12.05 A
Rated current at -5°C

11.79 A
Rated current at 0°C

11.54 A
Rated current at 5°C

11.28 A
Rated current at 10°C

11.03 A
Rated current at 15°C

10.77 A
Rated current at 20°C

10.51 A
Rated current at 25°C

10.26 A
Rated current at 30°C

10 A
Rated current at 35°C

9.58 A
Rated current at 40°C

9.17 A
Rated current at 45°C

8.75 A
Rated current at 50°C

8.33 A
Rated current at 55°C

7.91 A
Rated current at 60°C

7.5 A
Rated current at 65°C

7.08 A
Rated current at 70°C

6.66 A
Rated ultimate short-circuit breaking capacity Icu under 230 V AC IEC 60947-2

50 kA

Type of pole

4P
Curve

B

Number of modules

4

Nominal tightening torque top terminal

2.80 - 2.80 Nm
Nominal tightening torque down terminal

2.80 - 2.80 Nm
Nominal tightening torque

2.80 - 2.80 Nm
Type of bottom connection for modular devices

biconnect
Type of top connection for modular devices

Screw terminal
360° mounting position possible

Yes

Rated operational voltage Ue

230 - 415 V
Type voltage supply

AC
Rated insulation voltage Ui

500 V
Rated impulse withstand voltage Uimp

6000 V

Frequency

50 - 60 Hz

Cross-section of input and output with screws, for massive conductors

1 - 35 mm²
Cross-section of input and output with screws, for flexible conductors

1 - 25 mm²
Cross-section of input with screws, for flexible conductors

1 - 25 mm²
Cross-section of input with screws, for massive conductors

1 - 35 mm²

Ingress Protection (IP) class

IP20

Degree of pollution according to IEC 60664 / IEC 60947-2

2
Class of energy limitation I²t

3
Air humidity protection

For all climates
Operating temperature

-25 - 70 °C

Power dissipation at IN

8.29 W

Type of connection

Screw terminal
Top connection alignment for modular devices

Aligned terminal
Down connection alignment for modular devices

Aligned terminal

Height

83 mm
Width

70 mm
Depth

70 mm

Environmental value

We are committed to bettering our environmental performance by reducing our footprint while acting as a sustainability enabler for our customers. Learn More