Siemens Miniature circuit breaker, C, 3-pole, 400V, 10kA, 2A, 70mm Part number 5SY4302-7

Product Overview

The Siemens 5SY4302-7 is a SENTRON 5SY4 miniature circuit breaker (MCB), 3-pole configuration, designed for reliable over-current and short-circuit protection in residential, commercial, or light-industrial electrical installations. It is compact, DIN-rail mountable, and suitable for protecting three-phase circuits with low current demand.

Key Features

• 3-pole miniature circuit breaker (3P)
• Rated current: 2 A
• Rated AC voltage: 400 V AC (230 V single-phase supply possible)
• Tripping characteristic: Class C (suitable for general circuits and light inductive loads)
• Breaking capacity: 10 kA per EN 60898 / up to 35 kA per IEC 60947-2
• Compact 3-module width for DIN-rail installation
• Combined top and bottom terminals — flexible wiring for conductors
• Touch-protected, halogen-free, sealable and silicon-free design
• Screw-type terminals for solid, stranded or fine-stranded conductors (with core-end sleeves)

Technical Specifications

• Article Number: 5SY4302-7
• Product Family: SENTRON 5SY4 miniature circuit breakers
• Number of Poles: 3 (3P)
• Rated Current (In): 2 A
• Rated Operational Voltage (Ue): 400 V AC (230 V single-phase possible)
• Rated Insulation Voltage (Ui): 440 V AC
• Tripping Characteristic: Class C
• Breaking Capacity (Icn / Icu): 10 kA (EN 60898) / up to 35 kA (IEC 60947-2)
• DC Breaking Capacity: 15 kA (per IEC 60947-2)
• Number of Modules (Width): 3
• Mounting Type: DIN-rail (35 mm) quick-assembly system
• Connection Terminals: Screw terminals, conductor cross-section 0.75 … 35 mm² (solid or stranded); finely stranded with end-sleeves up to 25 mm²
• Mechanical Service Life: ~10,000 switching cycles
• Power Loss per Pole (at rated current): ~1.2 W
• Protection Class (with conductors connected): IP20
• Ambient Operating Temperature Range: –40 °C … +70 °C
• Net Weight (approx.): 0.466 kg

Compliance & Certifications

• Conforms to IEC / EN 60898-1 for miniature circuit breakers
• Also complies with IEC / EN 60947-2 for industrial switching applications
• Halogen-free, touch-protected, sealable and silicon-free housing per SENTRON 5SY4 standards

Applications

The 5SY4302-7 is ideal for protection of low-current three-phase circuits in distribution boards, control panels, and light industrial installations. Typical applications include control circuits, small motors, lighting or socket-outlet circuits, and general purpose protection where compact MCBs are required. Its 3-pole configuration makes it suitable for three-phase systems and ensures safety even in balanced or unbalanced loads.