Name: LLSRK Series - UL Class RK1 Dual Element Time-Delay Fuse
Brand: Littelfuse Inc.

LLSRK Series - UL Class RK1 Dual Element Time-Delay Fuse

Series: LLSRK

Questions? Contact Littelfuse Support

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.

Littelfuse LLSRK series POWR-PRO™ fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes.

LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses.

Applications:

All general-purpose circuits
Motors
Transformers
Solenoids
Fluorescent lighting
All system components with high in-rush currents

Features:

Extremely current limiting — Reduces damage to circuits and equipment under short-circuit conditions. Stops damaging short circuits faster than any mechanical protective device.
300kA Interrupting Rating — Littelfuse self-certified to 300,000 amperes as standard. Meets future trend towards higher available short circuit currents.
Reduced costs — Current limiting design often permits use of readily available, less costly equipment. Low resistance design reduces power consumption and utility bills.
Excellent time delay — True dual-element construction, with separate non-fatiguing thermally-reversible spring-loaded thermal overload element, withstands repeated surges within rated time delay without opening needlessly. Eliminates needless downtime caused by power surges or equipment demands.

Access specifications, certifications, check availability and order parts below

Catalog #	Amps (A)	Interrupting Rating	Opening	VAC (V)	VDC (V)	Size	Stock	Samples

LLSRK.100	0.1	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.150	0.15	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.200	0.2	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.250	0.25	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.300	0.3	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.400	0.4	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.500	0.5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.600	0.6	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK.800	0.8	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK001	1	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK01.4	1.4	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK01.6	1.6	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK01.8	1.8	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK1.12	1.125	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK1.25	1.25	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK002	2	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK02.5	2.5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK02.8	2.8	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK2.25	2.25	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK003	3	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK03.2	3.2	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK03.5	3.5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK004	4	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK04.5	4.5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK005	5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK05.6	5.6	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK006	6	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK6.25	6.25	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK007	7	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK008	8	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK009	9	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK010	10	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK012	12	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK015	15	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK17.5	17.5	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK020	20	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK025	25	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK030	30	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK035	35	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK040	40	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK045	45	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK050	50	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300		Check	Order
LLSRK060	60	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Industrial Cartridge	Check	Order
LLSRK070	70	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK075	75	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK080	80	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK090	90	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK100	100	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK110	110	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK125	125	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK150	150	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK175	175	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK200	200	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK225	225	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK250	250	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK300	300	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK350	350	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK400	400	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK450	450	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300		Check	Order
LLSRK500	500	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order
LLSRK600	600	20 kA @ 300 Vdc	Slo-Blo/Time Lag (T)/Time Delay	600	300	Knife-Blade	Check	Order

Catalog #	Certificates

LLSRK.100
LLSRK.150
LLSRK.200
LLSRK.250
LLSRK.300
LLSRK.400
LLSRK.500
LLSRK.600
LLSRK.800
LLSRK001
LLSRK01.4
LLSRK01.6
LLSRK01.8
LLSRK1.12
LLSRK1.25
LLSRK002
LLSRK02.5
LLSRK02.8
LLSRK2.25
LLSRK003
LLSRK03.2
LLSRK03.5
LLSRK004
LLSRK04.5
LLSRK005
LLSRK05.6
LLSRK006
LLSRK6.25
LLSRK007
LLSRK008
LLSRK009
LLSRK010
LLSRK012
LLSRK015
LLSRK17.5
LLSRK020
LLSRK025
LLSRK030
LLSRK035
LLSRK040
LLSRK045
LLSRK050
LLSRK060
LLSRK070
LLSRK075
LLSRK080
LLSRK090
LLSRK100
LLSRK110
LLSRK125
LLSRK150
LLSRK175
LLSRK200
LLSRK225
LLSRK250
LLSRK300
LLSRK350
LLSRK400
LLSRK450
LLSRK500
LLSRK600

	LLNRK LLSRK Datasheet
	LLSRK070 3D Model IGS
	LLSRK450 3D Model IGS
	LLSRK225 3D Model IGS
	LLSRK035 3D Model IGS
	LLSRK110 3D Model IGS
	Rockwell Encompass Brochure
	Littelfuse Rockwell Catalog
	LLSRK Time Current Curves
	MROplus Brochure
	Fuse Fundamentals Technical Paper
	UL POWR Fuses Flyer

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LLSRK Series - UL Class RK1 Dual Element Time-Delay Fuse

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