Siemens Miniature circuit breaker, 1-pole, 230/400V, 6kA, 3A Part number 5SY6103-7

Product Overview

The Siemens 5SY6103-7 is a 1-pole miniature circuit breaker (MCB) from the SENTRON 5SY6 series, designed for over-current and short-circuit protection in low-voltage AC distribution systems. With a rated current of 3 A and a “C” tripping characteristic, it ensures reliable protection for lighting, control circuits, and general-purpose loads. Its compact modular design makes it suitable for DIN-rail mounting in consumer units, distribution boards, and industrial control panels.

Key Features

• Miniature circuit breaker, SENTRON 5SY6 series
• Rated current 3 A — suitable for small load protection
• Tripping characteristic: Curve C (moderate inrush loads)
• Short-circuit breaking capacity: 6 kA
• 1-pole module — compact for space-efficient DB layouts
• DIN-rail mounting (35 mm)
• IP20 touch-safe terminal design (when installed in enclosure)
• Designed for residential, commercial and light industrial networks

Technical Specifications

• Article Number: 5SY6103-7
• Product Type: Miniature Circuit Breaker (MCB)
• Poles: 1-pole
• Rated Current: 3 A
• Rated Voltage: 230/400 V AC
• Tripping Curve: C-characteristic
• Breaking Capacity: 6 kA
• Insulation Voltage (Ui): 440 V
• Mounting: DIN-rail, 1 module width
• Protection Rating: IP20
• Service Life: ~10,000 mechanical switching cycles (typical)

Compliance & Standards

• Conforms to IEC/EN MCB standards for low-voltage protection
• Part of Siemens SENTRON protection portfolio for distribution systems
• Suitable for over-current and short-circuit protection in AC circuits

Applications

Ideal for protecting small electrical circuits in homes, offices, commercial facilities and control panels. Common uses include lighting circuits, control wiring protection, small appliance circuits, socket circuits, and sensitive equipment feeds where reliable 3 A protection is required.