KLLU Series - 600 VAC, Time-Delay, 601-4000 A

Series: KLLU
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Littelfuse Fuse KLLU Peak Let Thru Curves
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

KLLU series UL Listed, time-delay, Class L are quality fuses in every sense of the word. They were developed to provide a somewhat lower priced alternate to the POWR-PRO™ KLPC series fuses. KLLU series fuses meet or exceed all UL requirements for Class L fuses. For superior protection and performance, specification-grade POWR-PRO™ KLPC series fuses are the recommended fuses.

Applications:

  • Service switches
  • Switchboard mains and feeders
  • Bolted pressure contact switches
  • Motor control center mains
  • Large motor branch circuits
  • UL Listed series-rated protection for molded case circuit breaker panelboards and loadcenters. See panelboard manufacturer’s literature for recommended fuse rating.

Safety:

  • 200,000 A.I.R. — Provides reliable interruption of all overcurrents up to 200,000 amperes.
  • When used for motor branch circuit protection, KLLU fuses may be sized close to the motor full-load current, providing excellent protection to branch circuit conductors, motor control equipment and motors.

Longer Equipment Life:

  • Current limiting — Reduces short circuit damage to systems and equipment.
  • Reduced downtime
  • Ten second minimum time delay at 500 percent of rating eliminates needless downtime caused by heavy starting currents of large motors and other inductive loads.
  • Selective coordination — KLLU fuses coordinate well with other Class L fuses and with all current-limiting Littelfuse fuses rated 600 amps or less. This means less time spent trying to locate short circuits or overloaded equipment, because only the fuse immediately on the line side of the affected circuit opens.

Easy to Use:

  • 200,000 A.I.R. rating minimizes need for short circuit calculations…meets present and future system requirements.
  • KLLU fuse time-current characteristics closely match typical time-current curves of circuit breakers. Although fuse/circuit breaker systems can seldom be 100% coordinated , KLLU series fuses permit use of a wider range of breaker setting than fast-acting Class L fuses. Excellent protection for a single breaker or a group of breakers.

Product Literature

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Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)Interrupting RatingOpeningVAC (V)VDC (V)SizeStockSamplesCompare
KLLU601601200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU650650200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU700700200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU750750200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU800800200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU900900200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU10001000200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU12001200200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU13501350200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU14001400200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU15001500200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU16001600200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU18001800200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU20002000200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU25002500200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU30003000200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU35003500200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
KLLU40004000200 kA @ 600 VacSlo-Blo/Time Lag (T)/Time Delay600300Bolt-InCheckOrder
Catalog # Certificates
Sorting icon
KLLU601 CSAiconULiconCULicon
KLLU650 CSAiconULiconCULicon
KLLU700 CSAiconULiconCULicon
KLLU750 CSAiconULiconCULicon
KLLU800 CSAiconULiconCULicon
KLLU900 CSAiconULiconCULicon
KLLU1000 CSAiconULiconCULicon
KLLU1200 CSAiconULiconCULicon
KLLU1350 CSAiconULiconCULicon
KLLU1400 CSAiconULiconCULicon
KLLU1500 CSAiconULiconCULicon
KLLU1600 CSAiconULiconCULicon
KLLU1800 CSAiconULiconCULicon
KLLU2000 CSAiconULiconCULicon
KLLU2500 CSAiconULiconCULicon
KLLU3000 CSAiconULiconCULicon
KLLU3500 CSAiconULiconCULicon
KLLU4000 CSAiconULiconCULicon

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