Type: 3120-F

Will be replace
~ 54 mm

The 3120-F circuit breaker/switch combination is an ON/OFF switch with integral overcurrent protection (S-type TO CBE to EN/IEC 60934). The trip element is a bimetal. Type 3120-F is ideally suited for overload protection of motors, pumps, transformers and cables.

Product characteristics:

  • rocker or push button actuation
  • single pole and double pole versions
  • reliable switching behaviour (positively trip-free)
  • convenient snap-in mounting
  • international approvals

Options and add-on modules:

  • illumination
  • water splash protection
  • auxiliary contacts
  • under voltage trip
  • remote trip
  • magnetic trip (see thermal-magnetic circuit breakers)
  • push-in terminals
  • appliance inlet module

This product is also available as switch only (more information see data sheet).

Important information:
By the end of this year, the new design version 3120-N will entirely replace the predecessor 3120-F. The last order date for series 3120-F is the 31 December 2020 (last delivery date: 30 June 2021).

More information:

New generation of 3120 circuit breakers

Voltage rating
  • AC 240 V (AC 415 V to special order)
  • DC 50 V
  • UL/CSA: AC 250 V
Current ratings from 0.1A until 20A  
(up to 30 A to special order, single pole only)
Number of poles double pole
single pole
Mounting method flange
Terminal design blade terminals
screw terminals
Actuation push button
Auxiliary contacts with auxiliary contacts
without auxiliary contacts
Water splash protection with water splash protection
without water splash protection
Illumination with illumination
without illumination
Typical life 0.1...16 A 50,000 operations at 1 x IN, inductive, double pole

0.1...20 A 30,000 operations at 1 x IN, inductive, single pole
Interrupting capacity Icn 0.1...2 A: 10 x IN

2.5...20 A: 150 A single pole

2.5...20 A: 250 A double pole
Certificates VDE, CSA, UL, CCC


Order number Description

undervoltage release module


magnetic module


aux. contact module

X 221 619 01

water splash cover, transparent

X 222 143 01

translucent water splash cover

Y 303 068 01

insulated cover

Y 303 675 01

spacer for -F3/N3...


panel thickness < 2 mm

Y 303 675 02

spacer for -F3/N3...


panel thickness < 4 mm

Y 303 676 01

spacer for -F5/N5...

Y 303 862 01

terminal adapter

Y 303 885 31

blanking piece

Y 304 275 01

water splash cover black

Y 307 097 01



Appliance inlet module

Y 312 140 01

plug-in connector


  • Household, Hobby & Garden Equipment
  • Lighting technology
  • Medical technology
  • Minus DC 48 V
  • Rail vehicles
  • Telecom & Datacom
  • Watercraft & Vehicles

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Never replace a fuse again!

Thermal circuit breakers

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