Type 4230-T


Single pole and multipole thermal-magnetic miniature circuit breakers (MCBs) in accordance with EN 60947-2, UL 1077 and UL 489 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 is a thermal-magnetic MCB in a standard enclosure in accordance with DIN 43880. Its conformity with the relevant standards IEC 60947-2, UL1077 and UL 489 makes the 4230-T ideally suitable for worldwide use.
Due to its high rupture capacity of 63 A, the 4230 is suitable for use as »Branch Circuit Protection« and also 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
  • UL 489

Technical Data

Voltage rating
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


Auxiliary switch, approval according to UL 489


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


Error indication module, approval according to UL 489


Operating current module


Operating current module, approval according to UL 489


  • (Steel industry)
  • Automation
  • Automobile production
  • Chemical, Oil & Gas
  • Lighting technology
  • Mechanical engineering
  • Pharmaceutical & Food
  • Power Engineering AC 240 V
  • Power-D-Box-Systems
  • Renewable energies
  • Telecom & Datacom