3SB71-125, high current, 10 kA

• Overload protection

• Short circuit protection

• Isolation

• Controlling

• Used in residential building, non-residential building, industry, energy and infrastructure

Technical Specifications

• Standard: IEC 60947-2

• Rated current In (A): 80, 100, 125

• Rated voltage Un (V AC): 230/400

• Operational voltage (V AC): Min: 24; Max: 250/440

• Number of poles: 1, 2, 3, 4

• Trip characteristic: C, D

• Characteristic C (In): 8

• Characteristic D (In): 12

• Thermal operating limit (In): (1.05-1.3)

• Degree of protection: IP20, with connected conductors

• Electrical life (times): 4,000

• Mechanical life (times): 10,000

• Breaking capacity:

• Mounting position: Any

• Conductor cross-sections

• Solid and stranded (mm²): 1-50

• Finely stranded with end sleeve (mm²): 1-35

• Terminal tightening torque (N·m): 2.8

• Ambient temperature (°C): -25 ~ +45, max. 95 % humidity

• Storage temperature (°C): -40 ~ +75

• Altitude (meters): Max 2,000 

References

• Additional components: page 189 ~ 191

Instruction of Type Code

Features

• Rated current up to 125 A

• The handle being sealable or equipped with padlock bracket avoids dangerous operation changes (ON / OFF)

• The handle provides a clear indication of the contact position

• Adequate printing of all data on the front provides long-term identification

• Energy limiting class: 3

• The emission of ionized gases is limited to the severest restrictions: 45 mm grid distance

• This MCB for industry in accordance with IEC 60947-2 instantaneous tripping characteristic release B 4 In, release C 8 In, release D 12 In.

• This MCB may be extended with:

• A wide range of RCDs and RCBO

• Full sets of additional components

• Full sets of accessories

Add-on Devices

Auxiliaries

Selection and Ordering Data

Tripping Characteristic

IEC 60947-2 Standard

Magnetic Release

• An electromagnet with plunger ensures instantaneous tripping in case of short circuit

• The standard leaves the calibration of magnetic release to manufacturer’s decision.

• Sassin MCB series 3SB71-125 offers instantaneous tripping ranges

• release C: 8 In

• release D: 12 In

Thermal Release

• The release is initiated by a bimetal strip in case of overload

• The standard defines the range of release for two specific overload values

• Reference ambient temperature is 30 ºC

Outline and Installation Dimensions

3SB71-125 is installed on DIN rail