Description

Technical Specifications

• Product Model: PL9-C16-2-DC
• Brand: Eaton
• Warranty: One Year
• Input Voltage: Up to 250 V DC per pole
• Operating Temperature: -25 °C to +55 °C
• Storage Temperature: -40 °C to +75 °C
• Response Time: Instant magnetic trip at approximately 5–10 × rated current (C-curve)
• Protection Class: IP20 terminal protection
• Accuracy Class: Thermal-magnetic trip protection compliant with IEC standards
• Output Frequency: 0 Hz (designed for DC circuits)
• Rated Current Range: 16 A nominal current rating
• Communication Interface: None (electromechanical protection device)
• Supported Protocols: Not applicable
• Overload Capacity: Thermal overload release combined with instantaneous magnetic short-circuit protection
• Breaking Capacity: Up to 10 kA short-circuit interrupting capacity (IEC/EN 60947-2)
• Number of Poles: 2-pole configuration
• Mounting Type: 35 mm DIN-rail mounting (IEC/EN 60715)
• Trip Curve: Type C (suitable for moderate inrush currents)
• Dimensions: Approx. 80 × 45 × 70 mm (2-module width)

Product Description

Product Overview

The EATON PL9-C16-2-DC is a two-pole miniature circuit breaker specifically engineered for DC power distribution systems in industrial and energy applications. As part of the Eaton xPole PL9 series, the breaker provides reliable protection against overloads and short circuits in circuits operating with direct current.

DC circuits present unique protection challenges because electrical arcs do not naturally extinguish at zero crossing as they do in AC systems. This breaker integrates specialized arc-extinguishing technology designed to safely interrupt DC fault currents and prevent sustained arcing during switching events.

With a rated current of 16 A and a C-curve tripping characteristic, the device is optimized for circuits with moderate inrush currents such as control transformers, DC motors, and industrial power supplies. Its compact two-module design allows efficient installation in DIN-rail distribution panels and automation cabinets while maintaining a high short-circuit breaking capacity of up to 10 kA.

Because of its robust mechanical design and compliance with IEC standards, this breaker is widely used in photovoltaic systems, battery energy storage installations, and industrial DC control networks where reliable circuit protection is essential.

Key Functions

DC Circuit Overload Protection

The integrated thermal release mechanism detects sustained overcurrent conditions and automatically disconnects the circuit before wiring or equipment overheats.

Instantaneous Short-Circuit Interruption

A magnetic trip element reacts rapidly to high fault currents, isolating the circuit in milliseconds and protecting connected devices from severe electrical damage.

DC-Optimized Arc Suppression

The internal arc-quenching chamber is designed specifically for DC switching conditions, enabling safe interruption of fault currents without sustained arcing.

Compact DIN-Rail Installation

The breaker mounts directly on a standard 35 mm DIN rail, allowing easy integration into industrial control cabinets, solar combiner boxes, and electrical distribution boards.

Accessory Compatibility

The design supports common modular accessories such as auxiliary contacts, shunt releases, and comb busbars used in Eaton xPole distribution systems.

Application Scenarios

Photovoltaic Solar Power Systems

Solar installations use DC distribution circuits between panels, combiner boxes, and inverters. The breaker provides essential protection for PV strings and branch circuits.

Battery Energy Storage Systems

Energy storage installations rely on stable DC power distribution between battery modules and power conversion systems. The breaker isolates faults and protects battery circuits.

Industrial Automation Control Cabinets

Many PLC systems, sensors, and communication devices operate on DC power supplies. The breaker protects control circuits and ensures safe system operation.

Electric Vehicle Charging Infrastructure

EV charging stations often use DC power distribution in converters and charging modules. The breaker protects internal power circuits from overload and short-circuit faults.