Siemens Miniature circuit breaker, 1-pole, 230/400V, 10kA, 3A Part number 5SY4103-7

Product Overview

The Siemens 5SY4103-7 is a SENTRON miniature circuit breaker (MCB) engineered for reliable overcurrent and short-circuit protection in low-voltage installations. As part of the 5SY4 series, it delivers robust performance for residential, commercial, and industrial distribution boards. This device features a B-characteristic tripping curve, offering sensitive short-circuit protection suited to lighting and general-purpose circuits. With a rated current of 3 A and a breaking capacity of 6 kA, the 5SY4103-7 ensures stable, precise interruption of fault conditions while maintaining Siemens’ high safety and reliability standards.

Key Features

• SENTRON 5SY4 series miniature circuit breaker for dependable circuit protection
• B-curve tripping characteristic for standard protection of lighting and socket circuits
• Rated current: 3 A
• Rated breaking capacity: 6 kA according to IEC/EN 60898-1
• 1-pole device for single-phase circuit protection
• Fast and precise thermal-magnetic trip unit
• Snap-on mounting for DIN rail (EN 60715)
• Finger-safe terminal design for enhanced installation safety
• High mechanical durability for long service life
• Compatible with a wide range of SENTRON accessories

Technical Specifications

• Article Number: 5SY4103-7
• Product Family: SENTRON 5SY4 miniature circuit breakers
• Type: MCB, thermal-magnetic
• Rated Current: 3 A
• Tripping Characteristic: B-curve
• Number of Poles: 1
• Rated Breaking Capacity: 6 kA (IEC/EN 60898-1)
• Rated Operational Voltage: 230/400 V AC
• Rated Insulation Voltage: 440 V
• Rated Impulse Withstand Voltage: 4 kV
• Frequency: 50/60 Hz
• Connection Terminals: Top/bottom, box terminals for up to 25 mm²
• Mounting: DIN rail, snap-on
• Width: 1 module (18 mm)
• Ambient Operating Temperature: −25 °C to +45 °C (derating above +45 °C)

Compliance & Certifications

• Built according to IEC/EN 60898-1 standards for miniature circuit breakers
• Part of Siemens SENTRON protective devices for global low-voltage installations
• Meets mechanical and electrical endurance requirements for long-term reliability

Applications

The Siemens 5SY4103-7 is ideal for protecting single-phase circuits in residential distribution boards, commercial facilities, control panels, and light industrial systems. Its B-curve characteristics make it particularly suited for lighting circuits, general outlets, and small loads with low inrush currents. This MCB provides dependable protection against overloads and short circuits, ensuring operational safety and equipment longevity in everyday electrical installations.