Siemens Sentron Miniature circuit breaker, 3-pole, Curve D, 400VAC, 10kA, 16A Part number 5SY4316-8

Product Overview

The Siemens SENTRON 5SY4316-8 is a 3-pole miniature circuit breaker rated at 16 A with a Type D tripping characteristic and a short-circuit breaking capacity of 10 kA for AC applications up to 400 V. Designed with an installation depth of 70 mm, it provides compact yet robust protection for industrial circuits with high inrush currents.

Key Features

• 3-pole miniature circuit breaker with Type D tripping characteristic — ideal for circuits with high inrush currents such as motors or transformers
• Rated current: 16 A
• Rated operational voltage: 400 V AC (and insulation up to 440 V AC)
• Breaking capacity: 10 kA at relevant AC voltages
• Compact installation depth of just 70 mm for efficient panel design
• Touch-protected terminals and halogen-free/silicone-free construction for safety and industrial compliance

Technical Specifications

• Product Series: Siemens SENTRON 5SY4 Miniature Circuit Breaker
• Article Number: 5SY4316-8
• Number of Poles: 3
• Tripping Characteristic: Type D
• Rated Current (In): 16 A
• Rated Operational Voltage (Ue): 400 V AC
• Rated Insulation Voltage (Ui): 440 V AC
• Rated Impulse Withstand Voltage (Uimp): 4 kV
• Breaking Capacity: 10 kA (EN 60898), up to ~20 kA (IEC 60947-2) depending on configuration
• Depth (Installation): 70 mm
• Width: 3 modular width units
• Protection Class: IP20 (with connected conductors)
• Mechanical Service Life (Typical): 10,000 switching cycles
• Net Weight (Approx.): 0.445 kg

Compliance & Certifications

• Designed in accordance with IEC/EN 60898-1 and IEC/EN 60947-2 standards
• RoHS compliant and manufactured in Germany to Siemens industrial quality standards

Applications

The 5SY4316-8 is ideal for use in industrial and commercial low-voltage distribution boards, control panels and machine installations where circuits experience high transient inrush currents (such as motors, transformers or large capacitive loads). Its robust Type D characteristic ensures reliable protection and long service life in demanding environments.