Siemens Miniature circuit breaker, 3-pole, 10kA, 400V, 4A Part number 5SY4304-5

Product Overview

The Siemens 5SY4304-5 is a 3-pole miniature circuit breaker from the SENTRON 5SY4 series, rated at 4 A, tripping characteristic type A, with a short-circuit breaking capacity of 10 kA at 400 V AC, designed for industrial and infrastructure installations.

Key Features

• 3-pole design (3P) for full three-phase protection
• Rated current: 4 A
• Tripping characteristic: class A (designed for less inrush tolerance)
• Breaking capacity up to 10 kA (EN 60898) at 400 V AC; up to 35 kA (IEC 60947-2) in certain applications
• Compact installation depth of 70 mm, 3 modular width units
• Sealable design, halogen-free and silicon-free materials

Technical Specifications

• Product Series: Siemens SENTRON 5SY4 Miniature Circuit Breaker
• Article Number: 5SY4304-5
• Number of Poles: 3 (3P)
• Tripping Characteristic: A
• Rated Current (In): 4 A
• Rated Operational Voltage (Ue): 400 V AC
• Rated Insulation Voltage (Ui): 440 V AC
• Rated Short-Circuit Breaking Capacity (Icn): 10 kA (EN 60898) / 35 kA (IEC 60947-2)
• Connection Terminals: Top and bottom combined terminal
• Permissible Conductor Cross-Section: solid: 0.75–35 mm²; stranded: 0.75–35 mm²; finely stranded with end-processing: 0.75–25 mm²
• Installation Depth: 70 mm
• Width: Approx. 54 mm (3 modular width units)
• Height: Approx. 90 mm
• Net Weight (Approx.): 0.456 kg

Compliance & Certifications

• Protection class: IP20 (with connected conductors)
• Overvoltage category III, pollution degree 3
• Rated for mechanical service life: 10 000 operating cycles (typical)
• Compliant with IEC / EN 60898-1, IEC / EN 60947-2 standards

Applications

The 5SY4304-5 is suitable for industrial power distribution, motor feeder circuits, machine control panels and infrastructure installations where compact three-phase protection with a 4 A rating, type A tripping and high breaking capacity is required.