LF SERIES
FUSE BLOCK
TECHNICAL
BROCHURE
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cks
Littelf
use LF
Clas
Series
s J Blo
cks
Smaller Footprint
Provides Space Savings
DIN-Rail Mounting
Eases Installation
Indication Improves
Functionality
An Indication of Value
Littelfuse understands the challenge of constantly improving
OEM products —that’s why we developed a brand new line
of next-generation fuse blocks.
The LF Series fuse blocks. Smaller. More efficient. More
valuable to the user. These products meet design and
business objectives, provide value and differentiate OEM
products from the competition.
POWR-GARD
®
LF Series Fuse Blocks
LF SERIES CLASS J FUSE BLOCKS
600 V
Specifications
Voltage Ratings:
Ampere Ratings:
Leakage Current:
Flammability Rating:
Approvals:
Environmental:
600 V
0 – 600 A
<0.6 mA at 600 V
UL94 V-0
UL Listed: File No. E14721
CSA Certified: File No. LR7316
RoHS Compliant, Lead (Pb) Free
Description
The Littelfuse 600 V Class J blocks offer generous space
savings and enhanced value over previous generations,
such as indication, snap-to-release DIN rail mounting and
universal mounting holes.
Recommended Fuses
Time Delay
Series: JTD_ID
Series: JTD
Fast Acting
Series: JLS
For information about Touch-Safe Class J fuse holders:
www.littelfuse.com/lpsj
Features/Benefits
• Space-saving design—up to 45% smaller
than existing blocks
• Universal mounting holes for easy replacement
• Indication offered on all versions except 200–600 A
• One hand release from DIN rail for ferrule style fuses
• Reinforced fuse clips are standard on all Class J blocks
• Covers available for 100 A and lower to enhance safety
Web Resources
Sample requests, downloadable CAD drawings, fuse block
cover datasheet and other technical information:
www.littelfuse.com/fuseblocks
www.littelfuse.com/lfj
Ordering Information
(Class J 600 V)
AMP
RATING
SUFFIX
BASE
PART
PRESSURE
SCREW
NUMBER BOX LUG PLATE
LFJ600301
CID
PID
SID
LFJ600302
CID
PID
SID
LFJ600303
CID
PID
SID
LFJ600601
CID
—
—
LFJ600602
CID
—
—
LFJ600603
CID
—
—
LFJ601001
LFJ601003
LFJ602001
LFJ602003
LFJ604001
LFJ604003
LFJ606001
LFJ606003
CID
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TORQUE
WIRE RANGE
WIRE TYPE
BASE
DIN RAIL
TEMP
MOUNT
RATING
INDICATION
•
—
—
—
TERMINAL
ORDERING NUMBER
POLES
COVER
ORDERING
NUMBER*
30
60
1
2
3
1
2
3
1
3
1
3
1
3
1
3
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
CU Only
125˚C
•
• LFJ60030FBC
CU-AL
125˚C
•
• LFJ60060FBC
100
CU-AL
Solid/
Stranded
130˚C
—
LFJ60100FBC
200
400
600
CU-AL
CU-AL
CU-AL
130˚C
130˚C
130˚C
—
—
—
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class J fuse blocks.
*Covers sold individually. One cover needed for each pole.
©2012 Littelfuse POWR-GARD
®
Products
3
www.littelfuse.com
POWR-GARD
®
LF Series Fuse Blocks
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
Specifications
Voltage Rating:
Ampere Ratings:
Leakage Current:
Withstand Rating:
Flammability Rating:
Approvals:
Environmental:
250 V, 600 V
0 – 600 A
<0.6 mA at 600 V
Class H: 10 kA RMS SYM
Class R: 200 kA RMS SYM
UL94 V-0
UL Listed (File No. E14721)
CSA Certified (File No. LR7316)
RoHS Compliant, Lead (Pb) Free
Recommended Fuses
Description
The Littelfuse Class H/K5 and R blocks offer many benefits
such as indication, snap-to-release DIN rail mounting and
universal mounting holes. Class H and Class R fuse blocks
are dimensionally the same, but Class R blocks incorporate
a rejection feature, which only allows Class R fuses to
be inserted.
Class H/K5 Blocks – 250 V
NLN
RLN
Class R Blocks – 250 V
FLNR/FLNR_ID
KLNR
LLNRK
TLN
Class H/K5 Blocks – 600 V
NLS
RLS
Class R Blocks – 600 V
FLSR/FLSR_ID
KLSR
LLSRK/LLSRK_ID
IDSR
Features/Benefits
Universal mounting holes for easy replacement
Indication offered on most 250 V and 600 V versions
One hand release from DIN rail for ferrule style fuses
Reinforced fuse clips are standard on all Class H and
Class R fuse blocks
• Covers available for 100 A and lower to enhance safety
•
•
•
•
Web Resources
Sample requests, downloadable CAD drawings, fuse block
cover datasheet and other technical information:
www.littelfuse.com/fuseblocks
www.littelfuse.com/lfh
www.littelfuse.com/lfr
Ordering Information
(Class H 250 V)
INDICATION
—
•
•
—
—
—
TERMINAL
AMP
RATING
POLES
ORDERING NUMBER
BASE PART
NUMBER
LFH250301
LFH250302
LFH250303
LFH250601
LFH250602
LFH250603
LFH251001
LFH251003
LFH252001
LFH252003
LFH254001
LFH254003
LFH256001
LFH256003
BOX
LUG
C
C
C
CID
CID
CID
CID
CID
C
C
C
C
C
C
SUFFIX
PRESSURE
SCREW
PLATE
P
S
P
S
P
S
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TORQUE
WIRE
RANGE
6-14 AWG
10-14 AWG
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
(2) 350 kcmil-1/0
(2) 500 kcmil-4
CU-AL
CU-AL
CU-AL
CU-AL
WIRE TYPE
BASE
TEMP
RATING
DIN
RAIL
COVER
ORDERING
NUMBER*
30
60
1
2
3
1
2
3
1
3
1
3
1
3
1
3
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
CU Only
125˚C
•
LFH25030FBC
CU-AL
125˚C
•
LFH25060FBC
100
Solid/
Stranded
130˚C
—
LFH25100FBC
200
400
600
130˚C
130˚C
130˚C
—
—
—
—
—
—
Note: Reinforcing springs standard on all Class H fuse blocks.
*Covers sold individually. One cover needed for each pole.
www.littelfuse.com
4
©2012 Littelfuse POWR-GARD
®
Products
POWR-GARD
®
LF Series Fuse Blocks
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
Ordering Information
(Class H 600 V)
AMP
RATING
ORDERING NUMBER
SUFFIX
BASE
ORDERING BOX PRESSURE
SCREW
NUMBER
LUG
PLATE
LFH600301
CID
PID
SID
LFH600302
CID
PID
SID
LFH600303
CID
PID
SID
LFH600601
CID
—
—
LFH600602
CID
—
—
LFH600603
CID
—
—
LFH601001
LFH601003
LFH602001
LFH602003
LFH604001
LFH604003
LFH606001
LFH606003
CID
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
INDICATION
—
—
—
INDICATION
—
—
—
INDICATION
—
—
—
TERMINAL
TORQUE
WIRE
RANGE
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
130˚C
130˚C
Solid/
Stranded
•
•
COVER
ORDERING
NUMBER*
POLES
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
CU-AL
6-14AWG
2/0-6AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
• LFH60030FBC
• LFH60060FBC
100
200
400
600
130˚C
130˚C
130˚C
130˚C
—
—
—
—
• LFH60100FBC
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class H fuse blocks.
Ordering Information
(Class R 250 V)
AMP
RATING
ORDERING NUMBER
SUFFIX
BASE
ORDERING BOX PRESSURE
SCREW
NUMBER
LUG
PLATE
LFR250301
C
P
S
LFR250302
C
P
S
LFR250303
C
P
S
LFR250601
CID
—
—
LFR250602
CID
—
—
LFR250603
CID
—
—
CID
LFR251001
—
—
LFR251003
LFR252001
LFR252003
LFR254001
LFR254003
LFR256001
LFR256003
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TERMINAL
TORQUE
WIRE
RANGE
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
125˚C
125˚C
Solid/
Stranded
•
•
COVER
ORDERING
NUMBER*
POLES
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
CU-AL
— LFH25030FBC
• LFH25060FBC
100
200
400
600
130˚C
130˚C
130˚C
130˚C
—
—
—
—
• LFH25100FBC
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class R fuse blocks.
Ordering Information
(Class R 600 V)
AMP
RATING
ORDERING NUMBER
SUFFIX
BASE
ORDERING BOX PRESSURE
SCREW
NUMBER
LUG
PLATE
LFR600301
CID
PID
SID
LFR600302
CID
PID
SID
LFR600303
CID
PID
SID
LFR600601
CID
—
—
LFR600602
CID
—
—
LFR600603
CID
—
—
—
—
LFR601001
CID
—
—
LFR601003
CID
—
—
LFR602001
C
—
—
LFR602003
C
—
—
LFR604001
C
—
—
LFR604003
C
—
—
LFR606001
C
—
—
LFR606003
C
—
—
TERMINAL
TORQUE
WIRE
RANGE
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
130˚C
130˚C
•
•
COVER
ORDERING
NUMBER*
POLES
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
2.8 N-m (25 in-lbs)
5.6 N-m (50 in-lbs)
2.8 N-m (25 in-lbs)
13.6 N-m (120 in-lbs)
4.5 N-m (40 in-lbs)
4.0 N-m (35 in-lbs)
31.1 N-m (275 in-lbs)
31.1 N-m (275 in-lbs)
42.4 N-m (375 in-lbs)
C
P
S
6-14 AWG
10-14 AWG CU Only
10-22 AWG
2-4 AWG
6-14 AWG
2/0-6 AWG
8 AWG
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
CU-AL
Solid/
Stranded
CU-AL
• LFH60030FBC
• LFH60060FBC
100
130˚C
—
• LFH60100FBC
200
400
600
130˚C
130˚C
130˚C
—
—
—
—
—
—
(2) 350 kcmil-1/0
(2) 500 kcmil-4
Note: Reinforcing springs standard on all Class R fuse blocks.
*Covers sold individually. One cover needed for each pole.
©2012 Littelfuse POWR-GARD
®
Products
5
www.littelfuse.com
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