Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA Original Brand New
$73.91
High-performance 3-pole miniature circuit breaker (MCB) designed for industrial and commercial electrical protection. Featuring a 40A current rating and Type C tripping characteristic, it offers a 10kA breaking capacity and a compact 70mm mounting depth for reliable circuit safety.
Availability: In stock
Overview
The Siemens 5SY4340-7 is a high-performance miniature circuit breaker designed for industrial, commercial, and residential applications. Operating at 400V with a 10kA breaking capacity, this 3-pole device ensures reliable overcurrent and short-circuit protection. Its compact D=70 mm design makes it ideal for modern electrical panels while maintaining Siemens’ hallmark quality and safety standards.
Key Benefit
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Enhanced Safety: Reliable disconnection during electrical faults protects downstream equipment and personnel.
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Compact Design: The 70mm installation depth allows for easy integration into space-constrained distribution boards.
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Global Standards: Fully compliant with international safety standards for industrial use.
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Durability: Built with Siemens’ premium materials to ensure a long operational lifespan even in demanding environments.
Function / Features
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Poles: 3-pole configuration for three-phase systems.
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Current Rating: 40A for medium-load circuits.
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Characteristic Type: C-type tripping for general-purpose protection.
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Voltage Rating: 400V AC for standard electrical networks.
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Breaking Capacity: 10kA ensures safe disconnection under high fault currents.
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Dimensions: D=70 mm for space-saving installations.
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Compliance: Meets international safety standards for miniature circuit breakers.
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| Weight | 0.475 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 | C |
| 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 |
| energy limitation class | 3 |
| power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 3.5 W |
| operational current | – |
| ● at 35 °C / rated value | 40 A |
| ● at 45 °C / rated value | 37.6 A |
| ● at 50 °C / rated value | 36.76 A |
| ● at 55 °C / rated value | 35.92 A |
| ● at 60 °C / rated value | 35.04 A |
| ● at AC / rated value | 40 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 |
| Vibration and Shock | – |
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