Phoenix Contact

Surge protection and interference filters

Effective protection

High-frequency, low-energy interference can be smoothed and eliminated using interference filters. Meanwhile lightning and surge protective devices provide protection against transient and high-energy voltage peaks.

Your advantages

  • Protection for all common applications and signals, thanks to the complete product portfolio
  • Versatile fields of application – designs and connection methods for every application
  • Space-saving and inexpensive installation, thanks to slim design
  • Easy testing, thanks to plug-in arresters
  • Protection against transient and high-frequency voltages with combinations of interference filters and surge protection

The protective circuit principle

The protective circuit provides seamless protection against surge voltages.An “effective protective circuit” helps to implement seamless surge protection.

And this is how it works:

Draw an imaginary circle around the object you want to protect.

Surge protective devices must be installed at all points where cables intersect this circle.

The area within the protective circuit is therefore protected in such a way that conducted surge voltages are prevented.

Consider the following areas during planning:

  • Power supply
  • Measurement and control technology
  • Data processing, telecommunications
  • Transceiver devices


  • Surge protection for power supply units
  • Surge protection for renewable energy sources
  • Set solutions
  • Surge protection for measurement and control technology
  • Surge protection for information technology
  • Surge protection for transceiver systems
  • Interference filters
  • Test device for arresters


Power supply units

Power specialists

Do you want your automation solution to operate correctly? Do you also want to increase the productivity of your system? We have the right power supply unit for you – from 5 to 56 V and for all sectors: whether machine or system engineering, building automation, shipbuilding or process technology.

Your advantages

  • Maximum system availability, for example, thanks to the groundbreaking development of SFB technology
  • Operational reliability, thanks to extremely high-quality components
  • Flexible use: wide temperature range and adjustable output voltage

Performance characteristics of our power supply units

Five power supply unit product ranges tailored to different requirements

QUINT POWER – power supply units for maximum system availability

  • AC or DC input: single-phase, 3-phase
  • DC output: power up to 1000 W
  • Voltages: 12, 24, 48 V DC

TRIO POWER – power supply units with basic functionality for standard machine production

  • AC input: single-phase, 3-phase
  • DC output: power up to 1000 W
  • Voltages: 12, 24, 48 V DC

UNO POWER – compact power supply units with basic functionality

  • AC input: single-phase
  • DC output: power up to 100 W
  • Voltages: 12, 24 V DC

MINI POWER – power supply units for measurement and control technology

  • AC or DC input: single-phase
  • DC output: power up to 100 W
  • Voltages: 5, 10 – 15, 24, ±15 V DC

STEP POWER – power supply units for installation distributors and flat control panels

  • AC or DC input: single-phase
  • DC output: power up to 100 W
  • Voltages: 5, 12, 15, 24, 48 V DC


  • Power supply units for maximum functionality
  • Power supply units with basic functionality
  • Compact power supply units with basic functionality
  • Power supply units for measurement and control technology
  • Power supply units for installation distributors


Relay modules

Relay modules

Whatever the function you require: whether switching, isolating, monitoring, amplifying or multiplying. Our range satisfies all requirements. Whether for electromechanical and solid-state relays or timer and monitoring relays.

Your advantages

  • Versatile, thanks to industrial relays with numerous functions
  • Always the right solution – thanks to world-leading product variety
  • Space saving due to compact, narrow design
  • Excellent quality, thanks to high-grade materials and innovative technologies
  • Save costs: standardized accessories that are available worldwide

High quality and long service life

Do you set the bar high? Then you’ll only want relay modules that are reliable and long lasting.

We select materials and components carefully. The qualification methods used by Phoenix Contact are rigorous, production processes and test procedures are in line with the latest developments.

Unique technologies keep the device temperature lower than that in conventional PCBs.

You can form your own conclusion: relay modules from Phoenix Contact are of higher than average quality, completely reliable, and durable.


  • Electromechanical and solid-state relay modules
  • Monitoring relays
  • Safety devices
  • Timer relays




From space-saving circular connectors and data connectors to heavy-duty industrial connectors – these are all available in the comprehensive connector range from Phoenix Contact. We offer all connection technologies for your devices, for both copper and fiber optics (FO).

Your advantages

  • Versatile, thanks to the comprehensive product range
  • Maximum reliability, thanks to the outstanding level of quality and expertise
  • Innovative and time-saving connection solutions for devices with all the usual degrees of protection associated with industrial use
  • High degree of flexibility, thanks to customer-specific adaptations
  • Expert design-in support, thanks to product specialists

Circular connectors

Circular connectors

PLUSCON circular is the range of circular connectors for industrial automation. A wide range of sizes are available:

  • M5, M8, and M12 connectors for field cabling
  • M17 and M23 connectors primarily used to transmit analog and digital signals
  • M40 and M58 connectors for drive technology


Data plug-in connectors

Data plug-in connectors

The demand for fast information and data exchange is growing rapidly in industrial applications. Complex production systems are increasingly being distributed. Industrial conditions place high demands on plug-in connectors, connection technology, and cabling.
With PLUSCON data, Phoenix Contact offers components suitable for industrial applications with IP20 to IP6x protection.

Rectangular plug-in connectors

In devices, terminal boxes, and control cabinets – plug-in connectors are used throughout.
With its wide range of products, Phoenix Contact offers a virtually unlimited choice of versions:

  • Modular plug-in connector system
  • Variety of contact inserts from fiber optic connections to power connections
  • All common plug types from D-SUB to RJ45


  • 19″ plug-in card blocks and socket strips
  • Circular connectors
  • Data connectors
  • E-Mobility connectors
  • Heavy-duty connectors
  • Installation system
  • PCB connectors
  • PCB terminal blocks
  • Photovoltaic connectors
  • Product list Valve connectors
  • Rectangular connectors


 Suppressor diodes


  • The function is commonly referred to as fine protection.Graphic symbol for and U/I characteristic curves of a suppressor diode
  • Responds very quickly.
  • Low voltage limitation.
  • Standard version with low current carrying capacity and high capacitance.
    • At a nominal voltage of 5 V the maximum discharge capacity is approximately 750 A.
    • At higher nominal voltages the discharge capacity drops significantly.

Special features:

There are also diodes with a higher nominal voltage and greater discharge capacity. However, these versions are considerably larger and are therefore hardly ever used in combined protective circuits.


UR = Reverse voltage
UB = Breakdown voltage
UC = Clamping voltage
IPP = Peak pulse current
IR = Reverse current