WAGO 787 Series 4-Channel Electronic Circuit Breaker

Technical Overview

4-channel 24VDC electronic circuit breaker with 1-10A adjustable output and IP20 protection.

Key Features

Space-saving electronic circuit breaker with four independent channels.
Nominal current adjustable from 1 to 10 A per channel via selector switch.
Switch-on capacity greater than 50,000 μF per channel.
Illuminated, three-colored button per channel for switching (on/off), resetting, and diagnostics.
Time-delayed switching of channels for enhanced system stability.
Tripped message (group signal) for fault indication.
Remote input for resetting tripped channels or switching channels on/off.
Compact 32mm wide design for efficient use of panel space.
Operating temperature range of -25 to 70 °C.
IP20 protection rating per EN 60529.

Technical Specification Matrix

Parameter	Value
Input Voltage (Nominal)	24 VDC
Input Voltage Range	18 ... 30 VDC
Output Voltage (Nominal)	4 x 24 VDC
Output Voltage Range	18 ... 30 VDC (Ue − voltage drop)
Nominal Output Current (per channel)	4 x 1 / 2 / 4 / 6 / 8 / 10 A (adjustable)
Total Number of Channels	4
IP Rating	IP20 per EN 60529
Operating Temperature	-25 to 70 °C
Switch-on Capacity (per channel)	> 50,000 μF
Voltage Drop	≤ 250 mV (Input (+))
Trip Time	16 ms … 100 s (load-dependent)
Physical Weight (kg)	0.15
Dimensions L x W x H (cm)	12.8 x 3.2 x 9.5

Industrial Applications

1. Selective Protection for 24VDC Industrial Control Systems

This electronic circuit breaker provides precise, adjustable 1-10A protection for up to four individual 24VDC load circuits within an industrial control panel. Its ability to selectively trip a single faulty channel minimizes downtime for critical processes.

Problem Solved

Prevents widespread system shutdowns due to overcurrents in individual 24VDC components (e.g., sensors, actuators, PLCs) by isolating only the affected circuit, ensuring high system availability.

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2. Distributed DC Load Protection in Automated Manufacturing

Ideal for protecting multiple 24VDC loads in automated manufacturing lines, such as conveyor motors, robotic end-effectors, and vision system lighting. The adjustable current settings (1-10A) allow precise tuning for diverse equipment, and the remote reset feature enables quick fault recovery.

Problem Solved

Protects sensitive and high-value 24VDC equipment from damage due to short circuits or overloads, while also offering remote diagnostic and reset capabilities to reduce manual intervention and improve operational efficiency.

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3. Reliable 24VDC Circuit Protection for Smart Building Infrastructure

Suitable for power distribution and circuit protection in modern building automation systems, safeguarding 24VDC components like HVAC controls, lighting relays, and access control devices. The compact design and diagnostic LEDs simplify installation and troubleshooting in crowded electrical enclosures.

Problem Solved

Ensures continuous operation of building automation components by preventing cascading failures from electrical faults. On-site diagnostics (illuminated buttons) and compact form factor (32mm width) facilitate easy installation and maintenance within building management systems.

24VDCbuilding automationHVAClighting controlaccess controlsmart buildingfault diagnosticscompact designelectrical enclosure