Siemens Circuit breaker, 3-pole, D-Curve, 16A, 10kA Part number 5SY4316-5

Product Overview

The Siemens SENTRON 5SY4316-5 is a three-pole miniature circuit breaker (MCB) rated at 16 A with a B-curve tripping characteristic. It offers high breaking capacity (10 kA at 400 V AC) in a compact 3-module width design (70 mm depth). Ideal for final circuit protection in industrial and commercial installations requiring robust and reliable overload and short-circuit safeguarding.

Key Features

• Rated Current: 16 A
• Poles: 3-pole switching (three-phase protection)
• Tripping Characteristic: A-curve (sensitive to overloads)
• Breaking Capacity: 10 kA at 400 V AC (per EN 60898) and up to 20 kA in IEC 60947-2 applications
• Compact Installation Depth: 70 mm, width approx. 54 mm
• Screw Terminals (Top/Bottom): For flexible wiring on both sides
• Modular Mounting: DIN-rail compatible (35 mm rail) and suitable for panel installation
• Environmental Ratings: Overvoltage category III, pollution degree 3

Technical Specifications

• Product Series: SENTRON 5SY4 Miniature Circuit Breakers
• Rated Current (In): 16 A
• Rated Operational Voltage (AC): 400 V (three-phase); 230 V single phase
• Rated Insulation Voltage (Ui): 440 V
• Rated Short-Circuit Breaking Capacity (Icn): 10 kA (EN 60898 at 230/400 V)
• Rated Ultimate Breaking Capacity (Icu): 20 kA (IEC 60947-2 at AC 400 V)
• Depth: 70 mm
• Width: ~54 mm (3 modules)
• Installation Depth: 70 mm
• Net Weight: Approx. 0.495 kg
• Connectable Conductor Range: Solid/stranded up to 35 mm²
• Operating Temperature Range: –40 °C to +70 °C
• Protection Class: IP20 (with connected conductors)
• Country of Origin: Germany

Compliance & Certifications

• Standards: EN 60898-1 (Residential/Final circuits), IEC 60947-2 (Industrial circuits)
• UL 1077 / CSA C22.2 No.235: Approved as supplementary protector in North American markets
• CE Marking: Complies with applicable EU directives
• RoHS Compliant: Free from restricted hazardous substances since 01.10.2006
• WEEE Take-Back: Obligatory in EU markets

Applications

Ideal for protecting branch circuits in industrial distribution boards, machine control panels and commercial installations. Commonly used for lighting, receptacle circuits, auxiliary loads, and small three-phase final circuits that require compact insulation, high breaking capacity and sensitive overload protection.