Siemens 5SY4350-8 Miniature Circuit Breaker 3-Pole, 50A, D-Curve, 10kA, 400V Original Brand New
$188.32
High-performance 3-pole miniature circuit breaker (MCB) designed for industrial applications. Featuring a 50A rating, Type D tripping characteristic, and a 10kA breaking capacity, it provides reliable protection against short circuits and overloads in 400V systems.
Availability: In stock
Overview
The Siemens 5SY4350-8 Miniature Circuit Breaker is engineered to provide superior protection against overloads and short circuits in demanding industrial and commercial electrical installations. Featuring a D-curve characteristic, this MCB is ideal for circuits with high inrush currents such as motors, transformers, and heavy-duty equipment.
Built to Siemens’ stringent quality standards, this 3-pole breaker ensures operational safety, long service life, and consistent performance in high-load environments.
Key Benefit
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High breaking capacity (10kA) ensures maximum protection against short circuits
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D-curve tripping characteristic suitable for high inrush current applications
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3-pole design for balanced and secure three-phase protection
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Compact 70 mm depth for easy installation in distribution boards
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Siemens reliability for long-term operational safety
Function
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Protects electrical circuits from overload and short-circuit conditions
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Ensures safe disconnection during fault events
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Supports industrial-grade power distribution systems
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Maintains system stability in high-current startup environments
Technical Specification
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Brand: Siemens
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Product Number: 5SY4350-8
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Rated Voltage: 400 V
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Rated Current: 50 A
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Breaking Capacity: 10 kA
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Number of Poles: 3
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Tripping Characteristic: D Curve
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Installation Depth: 70 mm
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Application: Industrial & Commercial Electrical Systems
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| Weight | 0.487 kg |
|---|---|
| Dimensions | 58.00 × 94.00 × 84.00 mm |
| Brand | SIEMENS |
| product brand name | SENTRON |
| product designation | Miniature circuit breaker |
| number of poles | 3 |
| design of pole | 3P |
| tripping characteristic class | D |
| mechanical service life (switching cycles) / typical | 10 000 |
| overvoltage category | III |
| degree of pollution | 3 |
| type of voltage / of the operating voltage | AC |
| insulation voltage (Ui) | – |
| ● with single-phase operation / at AC / rated value | 440 V |
| ● with multi-phase operation / at AC / rated value | 440 V |
| supply voltage / with single-phase operation / at AC / rated value | 230 V |
| supply voltage | – |
| operating voltage / at DC / rated value / maximum | 72 V |
| protection class IP | IP20, with connected conductors |
| switching capacity current | – |
| ● at DC / acc. to IEC 60947-2 / rated value | 15 kA |
| ● acc. to EN 60898 / rated value | 10 kA |
| ● acc. to IEC 60947-2 / rated value | 15 kA |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 3.7 W |
| operational current | – |
| ● at 35 °C / rated value | 50 A |
| ● at 45 °C / rated value | 47 A |
| ● at 50 °C / rated value | 45.95 A |
| ● at 55 °C / rated value | 44.9 A |
| ● at 60 °C / rated value | 43.8 A |
| ● at AC / rated value | 50 A |
| suitability for operation | Mechanical engineering / industry |
| product component / neutral conductor switching | No |
| product feature / touch protection | Yes |
| product component | – |
| ● combined terminal top | Yes |
| ● combined terminal bottom | Yes |
| product feature | – |
| ● properties for main switches in accordance with EN 60204-1 | Yes |
| ● halogen-free | Yes |
| ● sealable | Yes |
| ● silicon-free | Yes |
| product extension / installable / supplementary devices | Yes |
| breaking capacity short-circuit current (Icn) | – |
| ● at AC / acc. to UL 1077 and CSA C22.2 No.235 | 5 kA |
| connectable conductor cross-section / solid | – |
| connectable conductor cross-section / stranded | – |
| connectable conductor cross-section / finely stranded / with core end processing | – |
| AWG number / as coded connectable conductor cross section | – |
| tightening torque [lbf·in] / with screw-type terminals | – |
| tightening torque / with screw-type terminals | – |
| position / of power supply cord | Any |
| installation depth | 70 mm |
| number of modular width units | 3 |
| fastening method | Quick assembly system |
| mounting position | any |
| influence of the surrounding temperature | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
| vibration resistance / acc. to IEC 60068-2-6 | ±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz |
| ambient temperature / during operation | – |
| ambient temperature / during storage | – |
| ● minimum | -40 °C |
| ● maximum | 75 °C |
| number of test cycles / for environmental testing / acc. to IEC 60068-2-30 | 6 |
| reference code | – |
| ● acc. to DIN EN 61346-2 | F |
| ● acc. to IEC 81346-2 | F |
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