FLSR400 FUS 600V T/D CLASS RK5 400A

In stock - 10 items available
SKU: FLSR400 UPC: FLSR400
Regular price $123.77 CAD
Regular price -42% $215.00 CAD Sale price $123.77 CAD

Questions? Ask an Expert or Visit the Store

Payment methods
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • Shop Pay
  • Visa

Weight: 4.0 lb

Service disconnects and large motor feeders with Class R clips need a 400 A fuse that rides through inrush but still limits fault current. The Littelfuse FLSR400 is a 400 A, 600 V AC Class RK5 dual-element time-delay fuse with a 200,000 A interrupting rating. It is a knife-blade fuse for fused switches, panelboards and switchboards, sold each.

Why electricians pick it

  • Dual-element time delay handles motor and transformer inrush.
  • Class RK5 fits Class R rejection clips.
  • 200 kA AC interrupting rating (20 kA DC).
  • Rated 600 V AC and 300 V DC.
  • UL listed (E81895) and CSA certified (LR29862).

Specifications

Spec Detail
Brand Littelfuse
Model FLSR400 (FLSR series)
Class UL Class RK5, dual element, time delay, current limiting
Amperage 400 A
Voltage 600 V AC / 300 V DC
Interrupting rating 200 kA AC / 20 kA DC
Size 2-19/32 in dia. x 11-5/8 in, knife blade
Certifications UL E81895, CSA LR29862
Cross references Bussmann FRS-R-400, Mersen TRS400R
Sold as Each

Pro tip from the counter

A 400 A knife-blade fuse weighs enough that a small midget-fuse puller will slip off it. Use an insulated puller sized for 61 to 600 A fuses, and only after the switch is open and verified dead; never lever the blade out with a screwdriver, which bends the clip and leaves a hot joint for the new fuse.

Best for: 400 A fused service and distribution switches, large motor feeders, switchboard and panelboard mains, plant maintenance spares

Ships across Canada from Vaughan, ON. Buying a set of three? Ask for a quote or call (905) 553-7171.

Free standard shipping to ON/QC on eligible orders of $150 or more after discounts; product restrictions apply. Eligible accounts: 10% off $99+ before shipping and tax. Sign in and confirm eligibility; guest checkout remains available. Terms apply.
CSA-approved products from a Canadian-owned supplier, 15+ years in Ontario.
Counter pickup in Vaughan, Monday to Friday, 8am to 4pm. Call the counter for advice.
30-day returns on most items. Bulbs, cut-to-length wire and hazardous goods are excluded.

Compare With Similar Items

Feature FLSR400 FUS 600V T/D CLASS RK5 400A
FLSR400 FUS 600V T/D CLASS RK5 400A
$123.77
Current
Brand LittleFuse
Type
Availability In stock
Rating No reviews

Pick up at our Vaughan counter

Our counter is at 8520 Jane St, Unit 5, Vaughan, ON L4K 5A9, open Monday to Friday, 8am to 4pm. Order online and collect, or bring a material list and we will price it at the counter. Contractors and DIY customers are both welcome.

Contact Us