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General Information
Extended Product Type: 
BMS311B20
Product ID: 
2CDS631031R0205
EAN: 
4016779043403
Catalog Description: 
Miniature Circuit Breaker
Long Description: 
The basic M MCB series protects installations against overloads and short-circuits, guaranteeing reliability and safety of operations. 
ABB basic M series satisfies most common requirements in terms of MCBs, allowing the usage of different pole configurations, characteristics and rated currents for residential and commercial applications. This product is manufactured according to international IEC standards.
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Technical
Tripping Characteristic: 
B
Rated Operational Voltage: 
acc. to IEC 60898-1 230 V

acc. to IEC 60947-2 440 V
Rated Insulation Voltage (Ui): 
acc. to IEC/EN 60664-1 440 V
Rated Impulse Withstand Voltage (Uimp): 
4 kV
Input Voltage Type: 
AC
Rated Current (In): 
20 A
Rated Short-Circuit Capacity: 
(AC) 3 kA

(230 / 400 V AC) 3 kA

(230 V) 3 kA
Rated Frequency (f): 
50 / 60 Hz
Power Loss: 
at Rated Operating Conditions per Pole 2.5 W
Energy Limiting Class: 
3
Electrical Endurance: 
4000 AC cycle
Mechanical Endurance: 
10000 cycle
Number of Poles: 
1P
Number of Protected Poles: 
1
Overvoltage Category: 
III
Tightening Torque: 
2 N·m
Actuator Type: 
Toggle
Actuator Marking: 
I  / O
Recommended Screw Driver: 
Pozidriv 2
Accessories Available: 
Yes
Connecting Capacity: 
Flexible 1 ... 16 mm²

Rigid 1 ... 25 mm²
Wire Stripping Length: 
12.5 mm
Material Compliance
RoHS Information:
2CDK400667D0201
RoHS Status: 
Following EU Directive 2011/65/EU
RoHS Date: 
20170816
REACH Declaration:
9AKK107492A1906
REACH Information: 
False - does not contain substances > 0.1 mass percentage
REACH Date: 
20240821
Conflict Minerals Reporting Template (CMRT):
9AKK108468A3363
WEEE Category: 
5. Small Equipment (No External Dimension More Than 50 cm)
WEEE B2C / B2B: 
Business To Business
Environmental
Ambient Air Temperature: 
Operation -5 ... +55 °C

Storage -40 ... +70 °C
Degree of Protection: 
IP20

Enclosure with Cover IP40
Pollution Degree: 
2
Dimensions
Width in Number of Modular Spacings: 
1.0
Product Net Width: 
17.5 mm
Product Net Height: 
88 mm
Product Net Depth / Length: 
69 mm
Product Net Weight: 
93 g
Built-In Depth (t2): 
69 mm
Container Information
Package Level 1 Units: 
carton 12 piece
Package Level 1 Width: 
92 mm
Package Level 1 Height: 
80 mm
Package Level 1 Depth / Length: 
220 mm
Package Level 1 Gross Weight: 
1.293 kg
Package Level 1 EAN: 
4016779043410
Package Level 2 Units: 
48 piece
Package Level 2 Width: 
183 mm
Package Level 2 Height: 
164 mm
Package Level 2 Depth / Length: 
445 mm
Package Level 2 Gross Weight: 
10.344 kg
Package Level 2 EAN: 
4016779052337
Ordering
Minimum Order Quantity: 
1 piece
Certificates and Declarations
Declaration of Conformity - CE:
2CDK400666D2701
Installation
Instructions and Manuals:
No document needed
Popular Downloads
Data Sheet, Technical Information:
9AKK107045A1496
External Classifications and Standards
ETIM 8: 
EC000042 - Miniature circuit breaker (MCB)
ETIM 9: 
EC000042 - Miniature circuit breaker (MCB)
UNSPSC: 
39121603
eClass: 
V11.0 : 27141901
IDEA Granular Category Code (IGCC): 
4897 >> Miniature circuit breakers
Standards: 
IEC 60898-1
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