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The All-New PISA-B Multi-Channel Electronic Circuit Breakers

April 27, 2023

The All-New PISA-B Multi-Channel Electronic Circuit Breakers

The all-new PISA-B multi-channel electronic circuit breakers help you to optimize the availability of your DC 24 V systems right away and grow with your application.

Features and Benefits

  • Higher Availability
    • Identify and isolate individual faulty branches
  • Higher Reliability
    • Fast trouble-shooting via real-time LED matrix and alarm signal
  • Higher Flexibility
    • Easy system expansion – up to 64 output channels via bus bar connection
  • Higher Security
    • Integrated PIN protection and fail-safe feature
  • Higher Time savings
    • Push-in terminals for fast and toolless installation
  • Higher Packing density
    • 8 channels, including + and – terminals, in a 52mm wide unit

PISA-B. The next generation of electronic circuit breakers. Protect Inform Secure Assist


Selective tripping of overloaded channels

In the event of a fault, PISA-B disconnects the affected channels only and ensures constant power supply to the remaining loads. This means individual faulty connections can be rapidly identified, isolated and rectified.

Two different output types

PISA-B features two types of output channels. Channel 1 and 2 are ideal for high capacitive loads up to 100mF and allow peak currents up to 12 A. Standard loads with up to 20 mF can be connected to channels 3 to 8 and are supplied with up to 10 A. You can choose between slow or fast tripping characteristics for all channels.


Instant current monitor

You can use the instant current monitor with LED technology at the front of the device to analyse and reset individual channels. The LED matrix helps to understand and evaluate your loads, detect peak currents and change your settings. 

Alarm signal

The electronic circuit breaker informs you about tripped channels via an alarm relay contact (PISA-B-812-B1, PISA-B-8CL2-B1).  An optional “digital coded alarm signal” provides information about the tripping status of individual channels (PISA-B-812-B4, PISA-B-8CL2-B4)

Reset feature

The additional reset relay contact allows switching the device ON and OFF or resetting all tripped channels remotely.


PIN protection

The new design of the PISA-B helps to avoid accidential operating errors or manipulation via a PIN protection feature. The settings can be locked with a 4-digit PIN code via the user interface on the front of the device.

Fail-safe switch

The fail-safe function is a back-up protection feature of the PISA-B. If one of the channel switches fails to open, the fail-safe function kicks in. Therefore an electronical switch is used instead of a traditional melting fuse. The electronic circuit breaker monitors the total current and can react much earlier, if the current becomes too high. This feature can save your lines from overheating.


Compact design

The compact product design helps you to save space. The electronic circuit breaker includes plus and minus distribution terminals, with a total width of only 52mm – that means 6.5mm per channel.

Modular design

PISA-B allows an easy and fast expansion of your system. Up to 8 devices can be connected in parallel via bus bars. This sums up to 64 channels in total.

Push-in terminals

PISA-B also assists you with a tool-less push-in technology. The terminals are optimized for automated wiring processes.

PISA-B gives you more of everything. Except effort.

PISA-B is the most efficient electronic circuit breaker (ECB). It distributes the current, protects your loads from over-current or short-circuits and monitors the operating status in DC 24V systems. The 8-channel programmable capability can identify and isolate individual faulty branches. It shuts down the affected channels only and secures the constant power supply of the remaining loads.

An integrated data monitoring reports the operating status to a PLC or control center. The electronic circuit breaker also alarms in case of an error and allows a remote reset of the channels. The new PISA-B is based on a modular product design. Up to 8 PISA-B electronic circuit breakers can be connected in parallel by using bus bars. This results in up to 64 channels.

Smart power distribution and load protection. Improve and simplify your application.

Miniature circuit breakers  Solution with standard MCBs
The All-New PISA-B Multi-Channel Electronic Circuit Breakers

This setup is quite risky for industrial applications. MCBs were originally designed to protect the cable runs in buildings on the AC side – not the system itself. Additionally this solution will not inform your condition monitoring system about the current system status or occurring errors.

Electronic circuit breakers Solution with PISA-B
The All-New PISA-B Multi-Channel Electronic Circuit Breakers

With a PISA-B solution you are on the safe side. The electronic circuit breaker will reliably secure your system components from overload and short-circuits. You will immediately be informed via the alarm signal. All other loads stay unaffected and keep your system running.

Your industry in focus. Limitless applications.

PISA-B for automotive industry

PISA-B electronic circuit breakers are used in conveyor control systems in the manufacturing lines of big automotive companies

Loads: I/O module, display monitors, camera controls, PLC


  • Compact solution
  • Adjustable tripping characteristics
  • High reliability
For factory automation

PISA-B electronic circuit brakers are the perfect supplementary units for modern factory automation. They are already in use for power distribution for conveyor belts and sensors,


  • Two channels for high capacitive loads
  • Communication interface for PLC
  • Direct access to measured application values
For machine building

PISA-B electronic circuit breakers are already used in various machines, line packaging machines, injection molding machines or CNC machines.


  • Precise and fast tripping in the event of overcurrents
  • Compact size
  • Wide temperature range

PISA-B for an endless number of other applications

More Information


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The term MTBF appears in the data sheets of various technical system components and often causes confusion. This is mainly due to the different calculation methods and the risk of confusion with the service lifetime of a device. At Puls, many R&D specialists deal with both parameters on a daily basis. With this knowledge, we bring a little light into the darkness in this blog article.

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