Littelfuse FLNR350ID Class RK5 Fuse – 350A – 250V Time-Delay Indicating Fuse

The Littelfuse FLNR350ID is a 350 Amp Class RK5 dual-element time-delay fuse designed for industrial and commercial electrical protection systems. Part of the FLNR_ID series, this fuse features a built-in blown-fuse indicator for quick visual status identification and simplified maintenance. Its dual-element construction provides reliable overload and short-circuit protection while allowing temporary motor starting and transformer inrush currents without nuisance opening.

Electrical Rating

• Current Rating: 350 Amps
• Maximum AC Voltage: 250 VAC
• Maximum DC Voltage: 125 VDC
• Interrupting Rating:
  • 300 kA AC
  • 20 kA DC

Key Specifications

• Manufacturer: Littelfuse
• Catalog Number: FLNR350ID
• Series: FLNR_ID
• Fuse Class: RK5
• Construction Type: Knife-Blade
• Fuse Type: Dual Element Time-Delay
• Indicating: Yes

Protection Characteristics

• Time-delay (slow-blow) operation
• Dual-element fuse design
• Provides overload and short-circuit protection
• Accommodates temporary motor and transformer inrush currents
• High interrupting capacity for industrial power distribution systems

Construction Features

• Knife-blade terminal construction
• Visual blown-fuse indication feature
• Industrial-duty design for demanding applications
• Durable construction for long service life

Mounting & Compatibility

• Mounting Method: Fuse Block / Clip / Holder
• Compatible with standard Class RK5 fuse holders and fuse blocks
• Suitable for industrial control panels, switchboards, and distribution equipment

Applications

• Motor branch circuit protection
• Transformer protection
• Commercial electrical distribution systems
• Industrial machinery and equipment
• Feeder and branch circuit protection

Product Data

• Manufacturer: Littelfuse
• Catalog Number: FLNR350ID
• Product Type: Indicating Time-Delay Fuse
• Series: FLNR_ID
• Fuse Class: RK5

Returns are easy

You may return items within 30 days of delivery for a refund.

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