The Hager MCB 4P B-40A 4M safeguards three-phase circuits against overloads and short circuits. With 20 kA Icu at 230/400 V and 10 kA Icn, it handles high fault levels. B-curve provides fast protection for standard/resistive loads. Rated 415 V AC, 50-60 Hz. Compact 4 modules, IP20. Screw terminals (1-35 mm2) with biconnect bottom ease wiring. Operates -25 to +70 C with high electrical and mechanical endurance.

EAN

3250614645952

Packaging

1 Piece

Miniature circuit breaker 4P 20A Curve B 25kA Icu 415V AC 4 Modules NQN440

Phase out product: please contact your electrical wholesaler for availability

Accessories
Technical properties
Environmental value
Documentations

Download the data sheet

Complete your system

Modular phase busbar 1 products available
Terminal cover 1 products available
AOB type A-HI 3 products available
AOB type AC 5 products available
AOB type AC/A-SEL 1 products available

Technical properties

Rated current

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

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

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

20 kA

Type of pole

4P
Curve

B

Number of modules

4

Rated short-circuit breaking capacity Icn AC according to IEC 60898-1

10 kA

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

Rated operational voltage Ue

415 - 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

Total power loss under IN

15 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

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REACh-SVHC free Yes