POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
250 V • 600 V
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: E14721)
CSA Certified (File: LR7316)
RoHS Compliant, Lead (Pb) Free
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.
Web Resources
Sample requests, downloadable CAD drawings and other
technical information:
littelfuse.com/lfh
littelfuse.com/lfr
Recommended Fuses
Class H/K5 Blocks – 250 V
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
•
•
•
•
NLN
Class R Blocks – 250 V
FLNR/FLNR_ID, KLNR, LLNRK
Class H/K5 Blocks – 600 V
NLS
Class R Blocks – 600 V
FLSR/FLSR_ID, KLSR, LLSRK/LLSRK_ID, IDSR
Ordering Information
(Class H 250 V)
AMP
RATING
BASE PART
NUMBER
LFH250301
LFH250302
LFH250303
LFH250601
LFH250602
LFH250603
LFH251001
LFH251003
LFH252001
LFH252003
LFH254001
LFH254003
LFH256001
LFH256003
SUFFIX
TORQUE
BOX PRESSURE
SCREW
LUG
PLATE
C
P
S
C
P
S
2.8 N-m (25 in-lbs)
C
P
S
CID
—
—
5.6 N-m (50 in-lbs)
CID
—
—
2.8 N-m (25 in-lbs)
CID
—
—
13.6 N-m (120 in-lbs)
CID
—
—
4.5 N-m (40 in-lbs)
CID
—
—
4.0 N-m (35 in-lbs)
C
—
—
31.1 N-m (275 in-lbs)
C
—
—
C
—
—
31.1 N-m (275 in-lbs)
C
—
—
C
—
—
42.4 N-m (375 in-lbs)
C
—
—
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
WIRE TYPE
BASE
TEMP
RATING
125˚C
125˚C
Solid/
Stranded
130˚C
130˚C
130˚C
130˚C
INDICATION
—
•
•
—
—
—
TERMINAL
POLES
ORDERING NUMBER
DIN
RAIL
COVER
ORDERING
NUMBER*
LFH25030FBC
LFH25060FBC
LFH25100FBC
—
—
—
30
60
100
200
400
600
1
2
3
1
2
3
1
3
1
3
1
3
1
3
C
P
S
CU Only
CU-AL
CU-AL
CU-AL
CU-AL
CU-AL
•
•
—
—
—
—
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
littelfuse.com/lfh
littelfuse.com/lfr
1 of 6
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
Ordering Information
(Class H 600 V)
AMP
RATING
BASE
ORDERING
NUMBER
LFH600301
LFH600302
LFH600303
LFH600601
LFH600602
LFH600603
LFH601001
LFH601003
LFH602001
LFH602003
LFH604001
LFH604003
LFH606001
LFH606003
BOX
LUG
CID
CID
CID
CID
CID
CID
CID
CID
C
C
C
C
C
C
SUFFIX
PRESSURE
SCREW
PLATE
PID
SID
PID
SID
PID
SID
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TORQUE
WIRE
RANGE
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
130˚C
130˚C
130˚C
130˚C
130˚C
130˚C
•
•
—
—
—
—
INDICATION
—
—
—
INDICATION
—
—
—
INDICATION
—
—
—
TERMINAL
ORDERING NUMBER
POLES
COVER
ORDERING
NUMBER*
30
60
100
200
400
600
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 CU Only
10-22 AWG
2-4 AWG
CU-AL
6-14AWG
2/0-6AWG
Solid/
8 AWG
CU-AL
Stranded
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
• LFH60030FBC
• LFH60060FBC
• 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)
TERMINAL
ORDERING NUMBER
AMP
RATING
POLES
BASE
ORDERING
NUMBER
LFR250301
LFR250302
LFR250303
LFR250601
LFR250602
LFR250603
LFR251001
LFR251003
LFR252001
LFR252003
LFR254001
LFR254003
LFR256001
LFR256003
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
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
125˚C
125˚C
130˚C
130˚C
130˚C
130˚C
•
•
—
—
—
—
COVER
ORDERING
NUMBER*
30
60
100
200
400
600
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 CU Only
10-22 AWG
2-4 AWG
CU-AL
6-14 AWG
2/0-6 AWG
Solid/
8 AWG
CU-AL
Stranded
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
— LFH25030FBC
• LFH25060FBC
• 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
LFR602001
LFR602003
LFR604001
LFR604003
LFR606001
LFR606003
CID
C
C
C
C
C
C
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TERMINAL
TORQUE
WIRE
RANGE
WIRE TYPE
BASE
SNAP
TEMP
TO
RATING RELEASE
130˚C
130˚C
130˚C
130˚C
130˚C
130˚C
•
•
—
—
—
—
COVER
ORDERING
NUMBER*
POLES
1
2
3
1
2
3
1
3
1
3
1
3
1
3
30
60
100
200
400
600
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
6-14 AWG
2/0-6 AWG
Solid/
8 AWG
CU-AL
Stranded
10-14 AWG
250 kcmil-6
CU-AL
CU-AL
CU-AL
• LFH60030FBC
• LFH60060FBC
• LFH60100FBC
—
—
—
(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.
littelfuse.com/lfh
littelfuse.com/lfr
2 of 6
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
CLASS H/K5 AND R FUSE BLOCKS
Dimensions mm (inches)
250 V 30 A
15.6 [.61]
13.0 [.51]
4.8 [.19]
28.6 [1.13]
23.8 [.94]
16.3 [.64]
6.8 [.27]
48.5 [1.91]
32.2 [1.27]
15.9 [.63]
5.6 [.22]
74.7 [2.94]
42.9 [1.69]
31.8 [1.25]
40.1 [1.58]
8.4
[.33]
76.5
[3.01]
31.9
38.2 [1.26]
[1.51]
R2.8 [.11]
TYP
.2 THRU
R2.8 [.11]
TYP
44.6
[1.76]
3.6 [.14]
250 V 60 A
22.4 [.88]
14.8 [.58]
9.7 [.38]
37.3 [1.47]
70.7 [2.78]
43.1 [1.70]
55.8 [2.20]
104.1 [4.10]
76.5 [3.01]
89.2 [3.51]
57.4 [2.26]
24.9 [.98]
43.9 [1.73]
75.7 [2.98]
119.7 [4.71]
R2.8 [.11]
TYP
5.5 [.21]
250 V 100 A
46.0 [1.81]
126.3 [4.97]
100.6 [3.96]
91.6 [3.61]
60.5 [2.38]
51.5 [2.03]
66.0 [2.60]
22.9 [.90]
34.7 [1.37]
20.3 [.80]
11.3 [.45]
53.6 [2.11]
72.6 [2.86]
133.0 [5.23]
R3.4 [.13]
TYP
177.8 [7.00]
littelfuse.com/lfh
littelfuse.com/lfr
3 of 6
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
CLASS H/K5 AND R FUSE BLOCKS
Dimensions mm (inches)
250 V 200 A
63.5 [2.50]
12.7 [.50]
76.2 [3.00]
63.5 [2.50]
19.1 [.75]
12.7 [.50]
228.6 [9.00]
215.9 [8.50]
184.2 [7.25]
165.1 [6.50]
72.4 [2.85]
15.9 [.63]
52.6
[2.07]
128.5
[5.06]
181.1
[7.13]
R4.3 [.17]
TYP.
Ø.3 THRU
Ø.3 THRU
Ø.8 .4
250 V 400 A
66.7 [2.63]
22.2 [.88]
15.9 [.63]
88.9 [3.50]
15.9 [.63]
266.7 [10.50]
250.8 [9.88]
84.4 [3.32]
15.9 [.63]
95.3
[3.75]
108.0
[4.25]
Ø.3 THRU
Ø.8 .4
95.3 [3.75]
Ø.3 THRU
Ø.8 .4
184.2
[7.25]
292.1
[11.50]
196.9 [7.75]
250 V 600 A
114.3 [4.5]
79.4 [3.1]
34.9 [1.4]
19.1 [.8]
317.5 [12.5]
19.1 [.8]
298.5 [11.8]
110.6 [4.4]
15.9 [.6]
114.3
[4.5]
139.7
[5.5]
Ø.3 THRU
Ø.6 .4
Ø.3 THRU
Ø.8 .4
215.9
[8.5]
114.3 [4.5]
Ø.3 THRU
Ø.6 .4
241.3 [9.5]
355.6
[14.0]
littelfuse.com/lfh
littelfuse.com/lfr
4 of 6
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
POWR-GARD
®
Blocks and Holders Datasheet
CLASS H/K5 AND R FUSE BLOCKS
Dimensions mm (inches)
600 V 30 A
21.5 [.85]
19.2 [.76]
16.8 [.66]
6.4 [.25]
38.4 [1.51]
73.1 [2.88]
51.6 [2.03]
41.1 [1.62]
107.9 [4.25]
86.4 [3.40]
75.9 [2.99]
52.5 [2.07]
20.7 [.82]
47.6
[1.87]
56.0
[2.20]
118.6
[4.67]
127.1
[5.00]
166.7
[6.56]
R3.4 [.13]
TYP
R2.6 [.10]
TYP
600 V 60 A
43.8 [1.73]
32.4 [1.28]
29.8 [1.17]
19.9 [.78]
11.4 [.45]
83.6 [3.29]
69.5 [2.74]
59.6 [2.35]
123.2 [4.85]
109.3 [4.30]
99.4 [3.91]
59.7 [2.35]
22.9 [.90]
74.2 [2.18]
[2.92]
134.6
[5.30]
184.2
[7.25]
55.2
R3.4 [.13]
TYP
.2 THRU
.5 .5
600 V 100 A
33.8 [1.33]
19.6 [.77]
15.0 [.59]
53.4 [2.10]
145.3 [5.72]
125.7 [4.95]
107.0 [4.21]
79.8 [3.14]
61.0 [2.40]
66.0 [2.60]
22.9 [.90]
64.6 [2.54]
R3.4 [.13]
TYP
172.8 [6.80]
228.6 [9.00]
littelfuse.com/lfh
littelfuse.com/lfr
5 of 6
© 2016 Littelfuse POWR-GARD
®
Products
Rev: 4-A-012516
