WAGO 787-3861/108-020 Electronic Circuit Breaker, 1-channel, 24 VDC, 0.5-10 A, DIN-rail

The WAGO 787-3861/108-020 is a high-performance electronic circuit breaker designed for reliable protection of 24 VDC loads. With a single channel and adjustable output current from 0.5 A to 10 A, it offers flexible tripping characteristics (fast, medium, slow) and active current limitation. Ideal for industrial control cabinets, it features push-in CAGE CLAMP® connection technology for fast and tool-free wiring.

Advantages

Active current limitation prevents voltage drops on the supply line, ensuring stable operation of other loads. Remote reset capability allows easy system recovery without manual intervention. High efficiency (>98%) minimizes power loss and heat generation.

Suitable for

• Industrial automation and control systems
• 24 VDC power distribution in machinery and plants
• Protection of PLCs, sensors, and actuators

Key specifications

• Number of channels: 1
• Nominal input voltage: 24 VDC (range 18...30 VDC)
• Adjustable output current: 0.5 A ... 10 A
• Tripping characteristic: adjustable (fast, medium, slow)
• Current limitation: active
• Reset function: remote and manual
• Status indication: LED and digital signal output
• Connection: Push-in CAGE CLAMP®
• Mounting: DIN-rail
• Operating temperature: -25 ... +70 °C
• Protection type: IP20
• Efficiency: >98%
• Power loss: <1.5 W at 10 A
• Wire size: 0.25...2.5 mm² / 24...12 AWG
• Approvals: CE, UL, GL

Recommendations

For optimal performance, use with a 24 VDC power supply capable of delivering the required current. The adjustable tripping characteristic allows customization to match load types. Remote reset can be integrated into your control system for automated fault recovery.