Siemens Switch disconnector with fuse, 250A

The SENTRON 3KF switch disconnector with fuse combines switching and overcurrent protection in a single compact unit. Rated for 250 A operation, this 3-pole Size 3 device is designed for low-voltage HRC fuses and features a front-operated mechanism for easy access and maintenance.

Key Features:

• 250 A rated current for medium to high-power applications
• 3-pole configuration for three-phase electrical systems
• Size 3 design optimized for space-efficient installation
• HRC fuse compatibility for Sizes 0 and 1 low-voltage fuses
• Front operating mechanism with center-mounted operation
• Basic unit design allows flexible handle configuration
• Flat terminal connections for secure electrical connections
• Integrated switching and protection in one device

Technical Specifications:

• Rated current: 250 A
• Pole configuration: 3-pole
• Fuse compatibility: LV HRC fuse Sizes 0 and 1
• Operating mechanism: Front operation, center position
• Terminal type: Flat terminals
• Handle: Basic unit without handle (handle sold separately)
• Size classification: Size 3
• Net weight: 5.315 kg
• Dimensions: 330 x 250 x 250 mm

Design Features:

• Modular construction allows customization with various handle options
• Front-accessible operation minimizes installation space requirements
• Robust construction for demanding industrial environments
• Clear switching positions for safe operation and maintenance
• Integrated fuse holders eliminate need for separate fuse carriers
• Standardized mounting compatible with standard electrical panels

Applications: Ideal for motor control centers, distribution panels, industrial machinery, and electrical installations requiring combined switching and short-circuit protection. Perfect for applications where space is limited and reliable overcurrent protection is essential.

Installation Benefits:

• Front operation allows installation in tight spaces with rear access limitations
• Flat terminals provide secure connections with standard lugs and cables
• Modular handle system enables customization for specific application requirements
• Standard mounting dimensions fit conventional electrical enclosures
• Easy fuse replacement through front-accessible design

Safety Features:

• Visible switching position indicates on/off status clearly
• HRC fuse protection provides reliable short-circuit and overload protection
• Mechanical interlock capability when used with appropriate handles
• Arc-resistant design ensures safe switching under load conditions
• Finger-safe terminals when properly installed and covered

Compatibility:

• Compatible with standard LV HRC fuses (Sizes 0 and 1)
• Works with various SENTRON handle and operating mechanism options
• Suitable for integration into motor control centers and distribution boards
• Compatible with standard electrical panel mounting systems

Compliance & Standards:

• RoHS compliant since January 31, 2016
• WEEE (2012/19/EU) take-back obligation applicable
• Export control: AL: N / ECCN: N
• Product class: Return restricted - contact Siemens partner
• Country of origin: China

Download existing graphical data for this product:

• 2D CAD Drawings (DWG)
• 3D Models (STEP/IGES)
• Installation Drawings
• Product Datasheet (PDF)
• Dimensional Drawings
• Wiring Diagrams
• Terminal Connection Details
• Fuse Compatibility Chart