3120-N: All-in-one solution

Protecting and switching in a single component!

For many design engineers it is the perfect solution to make their equipment reliable, compact and economic - all at once. The 3120-N thermal circuit breaker is the professional all-in-one solution for devices and machines. Well-proven a million times over, the 3120 reliably disconnects overcurrent and also serves as an ON/OFF switch. After tripping due to an overcurrent, the user can easily and quickly reset the 3120-N to resume operation. Time-consuming replacement of fuses is eliminated.

Your benefits:

  • Unrivalled equipment availability
  • Reduced mounting and wiring time
  • Space-saving design
  • Reduced planning and storage costs
  • Enhanced reliability

Seven in one

Example for parts reduction in the event of a 2-pole protection

E-T-A’s 3120-N circuit breaker here replaces 2 blade fuse holders, 2 blade fuses, a double pole rocker switch as well as the two cable connections between the rocker switch and fuse holder.

You are free to choose

A wealth of product versions is available of the 3120-N circuit breaker/switch combination. Depending on the requirements, you can choose between rocker and push button actuation. Product versions range from standard types to versions with actuator and/or dust and water splash protection.

More product infos:

Typ 3120-N

Use under harsh environmental conditions

The globally unique and innovative accordion-style seal and the version with a water splash cover exclude machine failures and product rejects on grounds of dust or water ingress. Compared to conventional dust and water splash protection solutions, these two versions of 3120-N do not only seal the actuating area. The rubber gasket encloses the bezel and tightly presses to the panel, so that the mounting cut-out is also protected.

Easy actuation

Thanks to freely accessible rocker actuators and large push buttons, the breakers can conveniently be operated even if fitted with actuator guards or water splash protection. Switching the device is simple, even when the user is wearing gloves. Particularly noteworthy is the globally unique variant with innovative accordion-style seal. Even this version features a freely accessible rocker which provides a clearly visible status indication (ON or OFF).

International approvals

Thanks to a great number of international approvals, the 3120-N is fit for global use.

Important information: New generation of 3120 circuit breakers

The 3120 circuit breaker/switch combination has been one of E-T-A’s best-selling products for many years. Based on feedback we received from our customers over the past few years, we launched a new enhanced generation, the N design, in July 2019. Thanks to e.g. freely accessible rocker actuators and large push buttons, the new breakers can always conveniently be operated, even if fitted with actuator guards or water splash protection. In addition, the globally unique accordion-style seal for the rocker-actuated version excludes machine failures and product rejects caused by dust or water ingress.

Important to know: Identical mounting cut-outs and performance data allow quick and easy interchange of the breakers, supported by unchanged approval data.

Type 3120-F has been discontinued since 31.12.2020 and replaced by type 3120-N.

Changes in form, fit and function of 3120-N:

Product design (form)

  • New flange design with rounded shape
  • New actuator guard (rocker-actuated version)
  • New accordion-style seal (rocker-actuated version)
  • Larger push buttons
  • Elimination of 3120-F2, 3120-F6 and 3120- F7 versions

Product integration (fit)

  • Minor changes of the panel thicknesses of versions with dust/water splash protection (see table in data sheet page 5)
  • No changes with regard to mounting holes

Product function and approvals (function)
No changes

Please do not hesitate to call in the event of any questions:


All information at a glance:

Info: New generation of 3120 circuit breakers

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