Product Overview
The Siemens SENTRON 5SY4316-8 is a 3-pole miniature circuit breaker (MCB) designed for reliable protection of circuits against overload and short-circuit faults. It features a D-curve tripping characteristic, making it ideal for applications with high inrush currents such as motors, transformers and capacitive loads. Engineered for industrial and infrastructure use, it provides dependable performance with a compact, robust design.
Key Features
- 3-pole miniature circuit breaker (3P) with D-curve tripping characteristic
- Rated current: 16 A at 400 V AC
- High short-circuit breaking capacity: 10 kA (EN 60898), 20 kA (IEC 60947-2), and 15 kA DC
- Rated operational voltage: up to 440 V AC / 72 V DC
- Compact modular design with only 3 width units (54 mm)
- Halogen-free, silicon-free, and sealable design for industrial compliance
- DIN-rail mounting with any installation position
Technical Specifications
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Product Brand: SENTRON
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Product Type: Miniature Circuit Breaker
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Article Number: 5SY4316-8
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Number of Poles: 3 (3P)
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Tripping Characteristic: D-curve
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Rated Current (In): 16 A
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Rated Operational Voltage (Ue): 400 V AC / 60 V DC
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Insulation Voltage (Ui): 440 V AC (single or multi-phase)
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Overvoltage Category: III
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Pollution Degree: 3
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Operational Frequency: 50 / 60 Hz
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Operating Current: 16 A at rated voltage; de-rated values 13.57–15.23 A depending on ambient temperature
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Breaking Capacity: 10 kA (EN 60898) / 20 kA (IEC 60947-2) / 15 kA DC
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Power Loss: 1.6 W per pole at rated current
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Mechanical Service Life: 10 000 operations (typical)
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Protection Class: IP20 (with connected conductors)
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Mounting Type: DIN rail, 35 mm (EN 60715)
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Installation Depth: 70 mm
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Dimensions (H × W × D): 90 mm × 54 mm × 76 mm
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Net Weight: 0.446 kg
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Conductor Cross-Section (solid): 0.75 – 35 mm²
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Conductor Cross-Section (stranded): 0.75 – 35 mm² / with ferrule 0.75 – 25 mm²
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Torque Range (screw terminals): 2.5 – 3.5 N·m (22 – 31 lbf·in)
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Mounting Position: Any
Environmental Conditions
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Operating Temperature: –40 °C to +70 °C
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Storage Temperature: –40 °C to +75 °C
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Relative Humidity: Up to 95 % RH (at 55 °C)
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Vibration Resistance: ± 1 mm (5–25 Hz) / 50 m/s² (25–150 Hz)
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Standards Complied With: IEC / EN 60898-1, IEC / EN 60947-2, UL 1077
Compliance & Certifications
- Complies with IEC / EN 60898-1 and IEC / EN 60947-2 standards
- UL 1077 recognised for supplementary protection applications
- Meets requirements for EN 60204-1 (main switch applications)
- Halogen-free, silicon-free and sealable construction
- EPD-certified environmental design and RoHS compliance
Applications
The 5SY4316-8 is suitable for industrial and infrastructure installations requiring dependable circuit protection with high inrush loads. Typical applications include motor and transformer circuits, capacitor banks, and industrial switchboards in manufacturing plants, process systems and building distribution networks. It offers safe, compact, and energy-efficient protection with a high service life and environmentally responsible design.