Siemens Miniature circuit breaker, B, 1-pole, 230/400V, 10kA, 1-pole, 4A Part number 5SY4104-6

Product Overview

The Siemens 5SY4104-6 is a SENTRON series miniature circuit breaker, 1-pole configuration, rated at 4 A with a B-characteristic tripping curve, designed for protection of single-phase circuits in industrial and infrastructure applications. It supports up to 230/400 V AC operation and offers a breaking capacity of 10 kA in the standard version.

Key Features

• Miniature circuit breaker from the Siemens SENTRON 5SY4 range
• 1-pole design (1P) for compact protection
• Rated current: 4 A
• Tripping characteristic: B-curve, suitable for general loads with low inrush
• Rated operational voltage: 230/400 V AC
• Breaking capacity: 10 kA (EN 60898) / up to 35 kA (IEC 60947-2) depending on variant
• DIN-rail mounting format with width of 18 mm (1 module) for efficient panel space usage
• Screw-type terminals for reliable conductor connection and long-term stability

Technical Specifications

• Product Series: SENTRON 5SY4
• Article Number: 5SY4104-6
• Poles: 1 (1P)
• Rated Current (In): 4 A
• Tripping Curve: B-characteristic
• Rated Voltage: 230/400 V AC (50/60 Hz)
• Breaking Capacity Icn (EN 60898): 10 kA
• Breaking Capacity Icu (IEC 60947-2): up to 35 kA
• Width: 18 mm (1 DIN module)
• Mounting Depth: approx. 70 mm
• Connectable Conductor Cross-Section: solid up to 35 mm², stranded up to 35 mm²
• Protection Class (Front): IP20 (with connected conductors)
• Ambient Operating Temperature: –25 °C to +55 °C (standard)

Compliance & Certifications

• Manufactured by Siemens as part of the SENTRON low-voltage switchgear family
• Complies with IEC/EN 60898-1 (for household and similar applications) and IEC/EN 60947-2 (for industrial switchgear) standards

Applications

Ideal for protecting branch circuits, lighting and socket circuits, control panels and small load feeders in industrial, commercial or residential installations. It is especially suited to environments requiring compact protection components with high reliability and standard breaking capacity.