3US5840-8W

Product ID:158078
Updated: 2026/7/2
Siemens 3US5840-8W

Key Features

  • 1Ensure precise protection with a 10 A tripping class for 70-88 A applications.
  • 2Integrate easily into panels using the compact Size 4 design.
  • 3Gain wiring flexibility with 1 NO and 1 NC auxiliary contacts.
  • 4Meet international standards including export control and RoHS compliance.
  • 5Simplify installation with quick setup and minimal packaging dimensions.

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Technical Specifications

Detailed engineering parameters

ParameterValueParameterValue
Operating Ambient Temperature
-40~+70°C
Operating Altitude
2000m
Rated Voltage
AC400V
Matching Contactor
S3/S4 [3TS47/48/49/50]
Mounting Method
Plug-in Installation with Contactor
Specification
S3/S4
Load Class
CLASS 10
Current Setting Range
70-88A
Rated Current (AC-3)
S3/S4 Size Maximum 105A
Product Series
3US5/6 Series
Lifecycle
Delivery Release (PM300)
Country of Origin
China
ECCN
N
AL
N
Model Number
3US5840-8W

Specifications may be subject to change without notice

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