ABB EPD24-TB-101-4A Electronic Circuit Breaker – 1 Channel – 4 A – 24 V DC

Why Choose the ABB 2CDE601101R2004 EPD24-TB-101-4A Electronic Circuit Breaker?

The ABB 2CDE601101R2004, also known as the EPD24-TB-101-4A, is a compact electronic protection device for 24 V DC load circuits designed to provide selective overcurrent protection in industrial automation and control systems. As part of the ABB EPD24 series, it detects overloads and short circuits rapidly and selectively disconnects the affected load circuit while helping other load circuits remain operational.

The device uses active electronic current limitation to protect individual DC load circuits. In the event of an overload or short circuit, disconnection occurs from approximately 1.1 × rated current, while the maximum possible overcurrent is limited to approximately 1.3–1.8 × the selected rated current. This selective protection helps minimise unnecessary interruption of unaffected circuits and simplifies fault diagnosis.

With a 4 A rated current, 24 V DC nominal voltage and an operating voltage range of 18–32 V DC, the EPD24-TB-101-4A is suitable for individual loads used in industrial automation and control applications. Its slim 12.5 mm module width and DIN-rail mounting make it well suited to space-conscious control cabinets.

Key Advantages

• Compact electronic circuit breaker for 24 V DC load circuits.
• 4 A rated current for individual DC load protection.
• Selective electronic protection isolates faults to the affected circuit.
• Active current limitation protects against overload and short-circuit conditions.
• Overload shutdown from approximately 1.1 × rated current.
• Maximum overcurrent limited to approximately 1.3–1.8 × rated current.
• Manual ON/OFF button for convenient circuit operation.
• Clear status and fault indication through an integrated LED and auxiliary contact.
• Space-saving 12.5 mm module width with DIN-rail mounting.

Key Features

• ABB EPD24 electronic protection device.
• EPD24-TB-101-4A model.
• 4 A rated current.
• 24 V DC nominal voltage.
• 18–32 V DC operating voltage range.
• Single protected output channel.
• Electronic tripping characteristic for selective DC load protection.
• Active electronic current limitation during short circuits.
• Overload disconnection from approximately 1.1 × IN.
• Maximum load capacitance up to 20,000 µF.
• Manual ON/OFF control.
• LED status and fault indication.
• Integrated auxiliary contact for fault signalling.
• DIN-rail mounting with screw terminals.
• Busbar-compatible LINE+ and 0 V connections for simplified multi-device wiring.

Selective Protection for 24 V DC Automation Systems

The ABB EPD24 series is designed specifically for selective protection of 24 V DC load circuits. When an overload or short circuit occurs, the electronic protection device detects the fault and switches off the affected output, helping prevent a fault in one branch from unnecessarily interrupting other connected load circuits.

The EPD24-TB-101-4A also supports capacitive loads up to 20,000 µF and provides clear status and fault indication through its LED and integrated auxiliary contact. ABB also provides compatible busbars for LINE+ and 0 V as well as signal bars for auxiliary contacts, helping simplify wiring where multiple EPD24 devices are installed together.

Typical Applications

• 24 V DC industrial automation systems.
• PLC and control system load protection.
• Sensors, actuators and instrumentation circuits.
• Industrial control cabinets and electrical panels.
• Machine automation and manufacturing equipment.
• DC power distribution and control circuits.
• Protection of individual electronic and inductive loads.