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Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V
Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V
Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V
Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V
Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V

SIEMENS

Siemens 5SY4204-8 Miniature Circuit Breaker 4A, 2-Pole, D-Curve, 10kA, 400V Original Brand New

Model / SKU5SY4204-8

High-performance Miniature Circuit Breaker from the Sentron series, featuring a 2-pole design, 4A rated current, and a Type D tripping curve. Designed for 400V AC systems, it provides a robust 10kA breaking capacity for superior industrial circuit protection.

Original price was: $99.05.Current price is: $51.49.
In stockShips in 1–3 business days
  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 5SY4204-8 Miniature Circuit Breaker (MCB) is a high-performance protection device designed to safeguard electrical circuits against overloads and short circuits. Built to Siemens’ stringent quality standards, this 2-pole MCB delivers reliable protection for industrial and commercial electrical installations operating at up to 400 V.

With a D-curve tripping characteristic, it is ideal for circuits with high inrush currents, ensuring stability and safety even under demanding conditions.

Benefit

  • Reliable protection against overload and short-circuit faults

  • D-curve characteristic suitable for high inrush current applications

  • Compact and space-saving design

  • High breaking capacity for enhanced system safety

  • Durable construction for long-term industrial use

  • Trusted Siemens quality and performance

Function

  • Automatically interrupts electrical flow during overload or short-circuit events

  • Protects connected equipment from electrical damage

  • Ensures safe operation of electrical distribution systems

  • Supports stable power distribution in industrial and commercial environments

Technical Specification

  • Brand: Siemens

  • Model: 5SY4204-8

  • Type: Miniature Circuit Breaker (MCB)

  • Number of Poles: 2-Pole

  • Rated Current: 4A

  • Tripping Curve: D

  • Rated Voltage: 400 V

  • Breaking Capacity: 10 kA

  • Depth (D): 70 mm

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Datasheet in PDF

Specifications

SKU / Model5SY4204-8
BrandSIEMENS
product brand nameSENTRON
product designationMiniature circuit breaker
number of poles2
design of pole2P
tripping characteristic classD
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 value35 kA
power loss [W] / for rated value of the current / at AC / in hot operating state / per pole1.2 W
operational current-
● at 35 °C / rated value4 A
● at 40 °C / rated value3.76 A
● at 45 °C / rated value3.63 A
● at 50 °C / rated value3.5 A
● at 55 °C / rated value3.36 A
● at 60 °C / rated value3.22 A
● at AC / rated value4 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 units2
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
Weight0.315 kg
Dimensions40.00 × 92.00 × 84.00 mm

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