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Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA
Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA
Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA
Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA
Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA

SIEMENS

Siemens 5SY4340-7 Miniature Circuit Breaker 3-Pole, 40A, C-Typ,e 400V, 10kA Original Brand New

Model / SKU5SY4340-7

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.

Original price was: $172.32.Current price is: $78.86.
In stockShips in 1–3 business days
  • ConditionOriginal Brand New
  • Warranty12 months
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Description

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

  • Enhanced Safety: Reliable disconnection during electrical faults protects downstream equipment and personnel.

  • Compact Design: The 70mm installation depth allows for easy integration into space-constrained distribution boards.

  • Global Standards: Fully compliant with international safety standards for industrial use.

  • Durability: Built with Siemens’ premium materials to ensure a long operational lifespan even in demanding environments.

Function / Features

  • Poles: 3-pole configuration for three-phase systems.

  • Current Rating: 40A for medium-load circuits.

  • Characteristic Type: C-type tripping for general-purpose protection.

  • Voltage Rating: 400V AC for standard electrical networks.

  • Breaking Capacity: 10kA ensures safe disconnection under high fault currents.

  • Dimensions: D=70 mm for space-saving installations.

  • Compliance: Meets international safety standards for miniature circuit breakers.

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Datasheet in PDF

Specifications

SKU / Model5SY4340-7
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breaker
number of poles3
design of pole3P
tripping characteristic classC
mechanical service life (switching cycles) / typical10 000
overvoltage categoryIII
degree of pollution3
type of voltage / of the operating voltageAC
insulation voltage (Ui)-
● with single-phase operation / at AC / rated value440 V
● with multi-phase operation / at AC / rated value440 V
supply voltage / with single-phase operation / at AC / rated value230 V
supply voltage-
operating voltage / at DC / rated value / maximum72 V
protection class IPIP20, with connected conductors
switching capacity current-
● at DC / acc. to IEC 60947-2 / rated value15 kA
● acc. to EN 60898 / rated value10 kA
● acc. to IEC 60947-2 / rated value15 kA
energy limitation class3
power loss [W] / for rated value of the current / at AC / in hot operating state / per pole3.5 W
operational current-
● at 35 °C / rated value40 A
● at 45 °C / rated value37.6 A
● at 50 °C / rated value36.76 A
● at 55 °C / rated value35.92 A
● at 60 °C / rated value35.04 A
● at AC / rated value40 A
suitability for operationMechanical engineering / industry
product component / neutral conductor switchingNo
product feature / touch protectionYes
product component-
● combined terminal topYes
● combined terminal bottomYes
product feature-
● properties for main switches in accordance with EN 60204-1Yes
● halogen-freeYes
● sealableYes
● silicon-freeYes
product extension / installable / supplementary devicesYes
breaking capacity short-circuit current (Icn)-
● at AC / acc. to UL 1077 and CSA C22.2 No.2355 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 cordAny
installation depth70 mm
number of modular width units3
fastening methodQuick assembly system
mounting positionany
influence of the surrounding temperaturemax. 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
● maximum75 °C
number of test cycles / for environmental testing / acc. to IEC 60068-2-306
reference code-
● acc. to DIN EN 61346-2F
● acc. to IEC 81346-2F
Vibration and Shock-
Weight0.475 kg
Dimensions58.00 × 94.00 × 84.00 mm

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