Type 8340-T


Single, two, three and four pole magnetic and hydraulic-magnetic circuit breakers with trip-free mechanism and toggle actuation. A choice of fast magnetic only or hydraulically delayed switching characteristics (S-type MO or HM CBE to EN 60934) ensures suitability for a wide range of applications. Featuring a combi-foot design for symmetric and asymmetric rail mounting. Low temperature sensitivity at rated load.

Approved to CBE standard EN 60934 (IEC 60934).

Technical Data

Voltage rating
  • 3 AC 415 V
  • AC 240 V (50/60 Hz)
  • DC 80 V
    (higher DC voltages to special order)
  • UL/CSA: 3 AC 250 V
  • UL/CSA: AC 250 V
Current ratings from 0.02 A up to 50 A  single pole (40 + 50 A DC only)
from 0.02 A up to 30 A  multipole
Number of poles double pole
four poles plus
single pole
three pole
Mounting method rail mounting
Terminal design screw terminals
Actuation manual release
Auxiliary contacts with auxiliary contacts
without auxiliary contacts
Water splash protection without water splash protection
Illumination without illumination
Typical life single and multipole:

0.02…30 A: 10,000 operations at 1 x IN, resistive

40 + 50 A: 6,000 operations at 1 x IN, resisitve

Interrupting capacity Icn 6 x IN at AC

4 x IN at DC

Certificates VDE, CSA, UL, CCC


Order number Description
X21058901/02 Connector bus links -K10

01 = 2.5 mm2 black


02 = 1.5 mm2 brown

Y30785101 plug-on cap
Y30849501 busbar 1-pole
Y30849601 busbar 2-pole
Y30849701 busbar 3-pole
Y30850401 supply terminal
Y30850601 plug-on cap


  • (Steel industry)
  • Automation
  • Automobile production
  • Chemical, Oil & Gas
  • Mechanical engineering
  • Minus DC 28 V
  • Minus DC 48 V
  • Minus DC 72 V
  • Pharmaceutical & Food
  • Telecom & Datacom