Type 4230-T (UL 1077 / EN 60947-2)


Single pole and multipole thermal-magnetic miniature circuit breakers (MCBs) in accordance with EN 60947-2 and UL 1077 for DIN rail mounting, with toggle actuation, visual status indication and high rupture capacity. A positively trip-free snap action mechanism ensures reliable switching behaviour. A range of trip characteristics and add-on modules allow a great variety of applications.

The 4230-T is a thermal-magnetic MCB in a standard enclosure in accordance with DIN 43880. Its conformity with the relevant standards IEC 60947-2 and UL1077 makes the 4230-T ideally suitable for worldwide use.
Due to its high rupture capacity of 63 A, the 4230-T is suitable for use as »Supplementary Protector«. Later product extensions by add-on modules such as an auxiliary contact module or a working current module offer high flexibility for the user. In addition, the device features reliable switching behaviour through a snap action  mechanism and it is positively trip-free.

Approvals and standards

  • IEC/EN 60947-2
  • UL 1077

Technical Data

Voltage rating

IEC/EN 60947-2
1...63 A:
            1P (AC 240 V); 2P, 3P, 4P (AC 415 V)
            1P (DC 80 V); 2P in series (DC 125 V)

UL 1077
1...63 A:
            1P (AC 277 V); 2P, 3P, 4P (AC 480Y/277 V)
            1P (DC 80 V); 2P in series (DC 125 V)
1A…63 A:
            1P (AC 120 V); 2P, 3P (AC 240 V)

Number of poles double pole
four poles plus
single pole
three pole
Mounting method rail mounting
Terminal design screw terminals
Actuation toggle/baton
Auxiliary contacts with auxiliary contacts
Water splash protection without water splash protection
Illumination without illumination
Typical life Mechanically 20,000 cycles


Order number Description

Auxiliary switch, approval according to IEC/EN 60947-5-1


Error indication module, approval according to IEC/EN 60947-5-1


Operating current module


  • Automation
  • Lighting technology
  • Mechanical engineering
  • Pharmaceutical & Food
  • Renewable energies
  • Telecom & Datacom


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