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  6. Improved visibility with LED lighting! Switch-compatible circuit protector.

Improved visibility with LED lighting! Switch-compatible circuit protector.

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3120-N

last updated:Jul 21, 2026

イーティーエィコンポーネンツ(E-T-A)
イーティーエィコンポーネンツ(E-T-A)
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A mechanism that does not require a power supply to illuminate the LED! By integrating overcurrent protection and switch functions, we reduce the number of components and achieve cost reduction! 【3120】

The "LED Illuminated Switch and Circuit Protector 3120 Series" eliminates the need for separate components such as switches, harnesses, fuse holders, fuses, LEDs, and LED power supplies, reducing the number of parts to create a single product. Additionally, it requires only one panel cutout, achieving cost reduction and miniaturization. As a circuit protector, it does not require fuse replacement. When the overcurrent protection activates, the rocker switch automatically turns OFF. By removing the abnormal load and turning the rocker switch ON again, it can be reused. This also helps minimize downtime. Illumination Status: LED lights up when the rocker switch is ON, and the LED turns off when the rocker switch is OFF. The LED also turns off when the overcurrent protection is activated and the device is in a tripped state. 【Features and Specifications】 - Mechanism that does not require a dedicated power supply for LED illumination - Compliant with international safety standards for medical electrical equipment (EN60601-1) - Also meets UL1077, CSA, VDE, and CQC standards - Suitable for a wide range of applications including machine tools, scientific instruments, construction machinery, vehicles, and motors - Dimensions: D25×W48×H52mm - Products with modules such as auxiliary circuit modules are also available in the lineup.

    switch
イプロスアイコン写真作成用.jpg

Improved visibility with LED lighting! Switch-compatible circuit protector.

イプロスアイコン写真作成用.jpg
イプロスアイコン写真作成用.jpg 3120-N551-P7T1-W19D.png 3120-N551-P7T1-W15DY4.png 3120-n521-p7_Standard_blue.png
  • E-T-A website page 3120-N
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【'3120 Series' Lineup】 <Locker Type>  "3120-N521": Without LED indicator, with LED indicator  "3120-N523": With malfunction prevention barrier  "3120-N524": With waterproof cover (IP65) <Push Button Type>  "3120-N52D" <Optional Modules Available>  "X3120-A": Inlet module with noise filter  "X3120-B": Inlet module  "X3120-U": Low voltage cutoff module  "X3120-M": Remote trip module  "X3120-S": Auxiliary circuit module *Additionally, We offer the "3130 Series" with 1 to 3 poles, the fuse holder type "1110 Series", and the "3140 Series" with 3 and 4 poles available in IP66 specifications. We provide circuit protection suitable for our customers.

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Switch-compatible circuit protector "3120-N series"

Switch-compatible circuit protector "3120-N series"

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■3120-N Switch and Circuit Protector Data Sheet

■3120-N Switch and Circuit Protector Data Sheet

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Switching Circuit Protector for Medical Devices 3120

Switching Circuit Protector for Medical Devices 3120

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Switch-compatible circuit protector 3120-N

Switch-compatible circuit protector 3120-N

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Waterproof circuit protector (IP65 compliant) 3120

Waterproof circuit protector (IP65 compliant) 3120

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AC inlet circuit protector

AC inlet circuit protector

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Waterproof circuit protector

Waterproof circuit protector

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Company information

イーティーエィコンポーネンツ(E-T-A)

イーティーエィコンポーネンツ(E-T-A)

Industrial Electrical Equipment

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E-T-A was founded in Germany in 1948 as a specialized manufacturer of circuit protector relays and has since grown into a global leader in overcurrent protection and power distribution systems. With the concept of "We protect lives and assets," our role is to protect people and machines from dangerous situations such as overcurrents and short circuits in electrical circuits. We take pride in having one of the widest product ranges and the highest number of certifications in the world, being recognized globally as a market leader, and continuously evolving by offering various solutions from individual components to complete systems. We own a UL-certified testing laboratory in-house and are committed to the development of global safety standards. The Japanese subsidiary of E-T-A was established in 1994. We aim to provide not only product deliveries but also to visualize our customers' concerns and questions regarding safety and offer appropriate advice through solution-oriented engineering. For us, quality is the culmination of hardware safety and reliability, along with the added value of engineering and services.

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