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POWR-GARD® Blocks and Holders Datasheet
1 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
250 V • 600 V
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.
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
Specifications
Voltage Rating 250 V, 600 V
Ampere Ratings 0-600 A
Leakage Current <0.6 mA at 600 V
Withstand Rating Class H: 10 kA RMS SYM
Class R: 200 kA RMS SYM
Flammability Rating UL94 V-0
Approvals UL Listed (File: E14721)
CSA Certified (File: LR7316)
Environmental RoHS Compliant, Lead (Pb) Free
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
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
POLES
ORDERING NUMBER
TORQUE
TERMINAL
WIRE
RANGE WIRE TYPE
BASE
TEMP
RATING
DIN
RAIL
INDICATION
COVER
ORDERING
NUMBER*
BASE PART
NUMBER
SUFFIX
BOX
LUG
PRES SURE
PLATE SCREW
30
1 LFH250301 C P S
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid/
Stranded
125˚C • — LFH25030FBC2 LFH250302 C P S P 10-14 AWG
3 LFH250303 C P S S 10-22 AWG
60
1 LFH250601 CID — — 5.6 N-m (50 in-lbs) 2-4 AWG CU-AL 125˚C • • LFH25060FBC2 LFH250602 CID — — 2.8 N-m (25 in-lbs) 6-14 AWG
3 LFH250603 CID — —
100 1 LFH251001 CID — — 13.6 N-m (120 in-lbs) 2/0-6 AWG
CU-AL 130˚C — • LFH25100FBC4.5 N-m (40 in-lbs) 8 AWG
3 LFH251003 CID — — 4.0 N-m (35 in-lbs) 10-14 AWG
200 1 LFH252001 C — — 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
3 LFH252003 C — —
400 1 LFH254001 C — — 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
3 LFH254003 C — —
600 1 LFH256001 C — — 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
3 LFH256003 C — —
Note: Reinforcing springs standard on all Class H fuse blocks. *Covers sold individually. One cover needed for each pole.
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POWR-GARD® Blocks and Holders Datasheet
2 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
LF SERIES CLASS H/K5 AND R FUSE BLOCKS
Note: Reinforcing springs standard on all Class H fuse blocks.
Note: Reinforcing springs standard on all Class R fuse blocks.
Note: Reinforcing springs standard on all Class R fuse blocks. *Covers sold individually. One cover needed for each pole.
Ordering Information (Class H 600 V)
AMP
RATING
POLES
ORDERING NUMBER
TORQUE
TERMINAL
WIRE
RANGE WIRE TYPE
BASE
TEMP
RATING
SNAP
TO
RELEASE
INDICATION
COVER
ORDERING
NUMBER*
BASE
ORDERING
NUMBER
SUFFIX
BOX
LUG
PRES SURE
PLATE SCREW
30
1LFH600301 CID PID SID
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid/
Stranded
130˚C • • LFH60030FBC2 LFH600302 CID PID SID P 10-14 AWG
3 LFH600303 CID PID SID S 10-22 AWG
60
1 LFH600601 CID — — 5.6 N-m (50 in-lbs) 2-4 AWG CU-AL 130˚C • • LFH60060FBC2 LFH600602 CID — — 2.8 N-m (25 in-lbs) 6-14AWG
3 LFH600603 CID — —
100 1 LFH601001 CID — — 13.6 N-m (120 in-lbs) 2/0-6AWG
CU-AL 130˚C — • LFH60100FBC4.5 N-m (40 in-lbs) 8 AWG
3 LFH601003 CID — — 4.0 N-m (35 in-lbs) 10-14 AWG
200 1 LFH602001 C — — 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
3 LFH602003 C — —
400 1 LFH604001 C — — 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
3 LFH604003 C — —
600 1 LFH606001 C — — 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
3 LFH606003 C — —
Ordering Information (Class R 250 V)
AMP
RATING
POLES
ORDERING NUMBER
TORQUE
TERMINAL
WIRE
RANGE WIRE TYPE
BASE
TEMP
RATING
SNAP
TO
RELEASE
INDICATION
COVER
ORDERING
NUMBER*
BASE
ORDERING
NUMBER
SUFFIX
BOX
LUG
PRES SURE
PLATE SCREW
30
1 LFR250301 C P S
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid/
Stranded
125˚C • — LFH25030FBC2 LFR250302 C P S P 10-14 AWG
3 LFR250303 C P S S 10-22 AWG
60
1 LFR250601 CID — — 5.6 N-m (50 in-lbs) 2-4 AWG CU-AL 125˚C • • LFH25060FBC2 LFR250602 CID — — 2.8 N-m (25 in-lbs) 6-14 AWG
3 LFR250603 CID — —
100 1 LFR251001 CID — — 13.6 N-m (120 in-lbs) 2/0-6 AWG
CU-AL 130˚C — • LFH25100FBC4.5 N-m (40 in-lbs) 8 AWG
3 LFR251003 CID — — 4.0 N-m (35 in-lbs) 10-14 AWG
200 1 LFR252001 C — — 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
3 LFR252003 C — —
400 1 LFR254001 C — — 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
3 LFR254003 C — —
600 1 LFR256001 C — — 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
3 LFR256003 C — —
Ordering Information (Class R 600 V)
AMP
RATING
POLES
ORDERING NUMBER
TORQUE
TERMINAL
WIRE
RANGE WIRE TYPE
BASE
TEMP
RATING
SNAP
TO
RELEASE
INDICATION
COVER
ORDERING
NUMBER*
BASE
ORDERING
NUMBER
SUFFIX
BOX
LUG
PRES SURE
PLATE SCREW
30
1 LFR600301 CID PID SID
2.8 N-m (25 in-lbs)
C 6-14 AWG
CU Only
Solid/
Stranded
130˚C • • LFH60030FBC2 LFR600302 CID PID SID P 10-14 AWG
3 LFR600303 CID PID SID S 10-22 AWG
60
1 LFR600601 CID — — 5.6 N-m (50 in-lbs) 2-4 AWG CU-AL 130˚C • • LFH60060FBC2 LFR600602 CID — — 2.8 N-m (25 in-lbs) 6-14 AWG
3 LFR600603 CID — —
100 1 LFR601001 CID — — 13.6 N-m (120 in-lbs) 2/0-6 AWG
CU-AL 130˚C — • LFH60100FBC4.5 N-m (40 in-lbs) 8 AWG
3 LFR601003 CID — — 4.0 N-m (35 in-lbs) 10-14 AWG
200 1 LFR602001 C — — 31.1 N-m (275 in-lbs) 250 kcmil-6 CU-AL 130˚C — — —
3 LFR602003 C — —
400 1 LFR604001 C — — 31.1 N-m (275 in-lbs) (2) 350 kcmil-1/0 CU-AL 130˚C — — —
3 LFR604003 C — —
600 1 LFR606001 C — — 42.4 N-m (375 in-lbs) (2) 500 kcmil-4 CU-AL 130˚C — — —
3 LFR606003 C — —
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POWR-GARD® Blocks and Holders Datasheet
3 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
CLASS H/K5 AND R FUSE BLOCKS
31.9
[1.26]
28.6 [1.13] 48.5 [1.91]
6.8 [.27]
74.7 [2.94]
40.1 [1.58]
8.4
[.33]
5.6 [.22]
R2.8 [.11]
TYP
.2 THRU
R2.8 [.11]
TYP
76.5
[3.01]
3.6 [.14]
38.2
[1.51]
44.6
[1.76]
4.8 [.19]
13.0 [.51]
15.6 [.61]
23.8 [.94]
16.3 [.64]
32.2 [1.27]
15.9 [.63]
31.8 [1.25]
42.9 [1.69]
119.7 [4.71]
37.3 [1.47]
70.7 [2.78] 104.1 [4.10] 57.4 [2.26]
24.9 [.98]
R2.8 [.11]
TYP
43.9 [1.73]
75.7 [2.98]
9.7 [.38]
14.8 [.58]
22.4 [.88]
55.8 [2.20]
43.1 [1.70]
5.5 [.21]
89.2 [3.51]
76.5 [3.01]
177.8 [7.00]
46.0 [1.81]
126.3 [4.97]
66.0 [2.60]
22.9 [.90]
R3.4 [.13]
TYP
53.6 [2.11]
72.6 [2.86]
133.0 [5.23]
11.3 [.45]
20.3 [.80]
34.7 [1.37] 60.5 [2.38]
100.6 [3.96]
51.5 [2.03]
91.6 [3.61]
250 V 30 A
250 V 60 A
250 V 100 A
Dimensions mm (inches)
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POWR-GARD® Blocks and Holders Datasheet
4 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
CLASS H/K5 AND R FUSE BLOCKS
181.1
[7.13]
76.2 [3.00]
228.6 [9.00]
Ø.3 THRU
72.4 [2.85]
15.9 [.63]
R4.3 [.17]
TYP.
63.5 [2.50]
12.7 [.50]
63.5 [2.50]
52.6
[2.07]
128.5
[5.06]
12.7 [.50]
19.1 [.75]
165.1 [6.50]
184.2 [7.25]
215.9 [8.50]
Ø.3 THRU
Ø.8 .4
88.9 [3.50]
292.1
[11.50]
95.3
[3.75]
15.9 [.63]
266.7 [10.50] 84.4 [3.32]
15.9 [.63]
108.0
[4.25]
184.2
[7.25]
22.2 [.88]
66.7 [2.63]
95.3 [3.75]
196.9 [7.75]
15.9 [.63]
250.8 [9.88]
Ø.3 THRU
Ø.8 .4
Ø.3 THRU
Ø.8 .4
355.6
[14.0]
114.3 [4.5]
114.3
[4.5]
317.5 [12.5]
19.1 [.8]
114.3 [4.5]
110.6 [4.4]
15.9 [.6]
139.7
[5.5]
215.9
[8.5]
19.1 [.8]
34.9 [1.4]
79.4 [3.1]
241.3 [9.5]
298.5 [11.8]
Ø.3 THRU
Ø.6 .4
Ø.3 THRU
Ø.8 .4
Ø.3 THRU
Ø.6 .4
250 V 200 A
250 V 400 A
250 V 600 A
Dimensions mm (inches)
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POWR-GARD® Blocks and Holders Datasheet
5 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
CLASS H/K5 AND R FUSE BLOCKS
166.
7
[6.56]
38.4 [1.51]
73.1 [2.88]
R3.4 [.13]
TYP
R2.6 [.10]
TYP
47.6
[1.87]
56.0
[2.20]
118.6
[4.67]
127.1
[5.00]
16.8 [.66]
21.5 [.85]
6.4 [.25]
19.2 [.76] 51.6 [2.03]
41.1 [1.62]
107.9 [4.25]
20.7 [.82]
52.5 [2.07]
75.9 [2.99]
86.4 [3.40]
184.2
[7.25]
43.8 [1.73]
.5 .5
R3.4 [.13]
TYP
83.6 [3.29] 123.2 [4.85]
59.7 [2.35]
22.9 [.90]
55.2
[2.18]
74.2
[2.92]
134.6
[5.30]
11.4 [.45]
19.9 [.78]
29.8 [1.17]
32.4 [1.28]
59.6 [2.35]
69.5 [2.74]
99.4 [3.91]
109.3 [4.30]
.2 THRU
600 V 30 A
600 V 60 A
600 V 100 A
Dimensions mm (inches)
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POWR-GARD® Blocks and Holders Datasheet
6 of 6 © 2016 Littelfuse POWR-GARD® Products
Rev: 4-A-012516
CLASS H/K5 AND R FUSE BLOCKS
244.3
[9.62]
76.2 [3.00]
12.7 [.50]
52.3
[2.06]
84.2
[3.32]
228.6 [9.00]
12.7 [.50]
31.8 [1.25]
Ø.3 THRU
Ø.3 THRU
Ø.3 THRU
Ø.3 THRU
Ø.8 .4
R4.3 [.17]
TYP.
52.3
[2.06]
72.4
[2.85]
15.9
[.63]
160.1
[6.31]
192.0
[7.56]
63.5 [2.50] 44.5 [1.75]
63.5 [2.50] 165.1 [6.50]
76.7
[3.02]
84.1
[3.31]
160.3
[6.31]
196.9 [7.75]
Ø.7 .4
Ø.8 .4
88.9 [3.50]
368.3
[14.50]
15.9 [.63]
22.2 [.88]
95.3
[3.75]
146.1
[5.75]
266.7 [10.50]
15.9 [.63]
84.4 [3.32]
15.9 [.63]
222.3
[8.75]
273.1
[10.75]
66.7 [2.63]
73.0 [2.88]
250.8 [9.88]
Ø.8 .4
Ø.3 THRU
114.3 [4.50]
431.8
[1
7.00]
19.1 [.75]
114.3
[4.50]
177.8
[7.00]
317.5 [12.50]
110.6 [4.3
6]
15.9 [.63]
254.0
[10.00]
34.9 [1.38]
79.4 [3.13]
95.3 [3.75]
19.1 [.75]
298.5 [11.75]
Ø.8 .4
Ø.3 THRU
Ø.6 .4
Ø.3 THRU
600 V 200 A
600 V 400 A
600 V 600 A
Dimensions mm (inches)
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Littelfuse:
LFH256003C LFH250302S LFH600303SID LFH250302P LFH604003C LFH600303PID LFR600302CID
LFH250302C LFH600302PID LFH600301PID LFH606001C LFH251001CID LFH250301S LFR600301PID
LFH600603CID LFH601003CID LFH252003C LFH252001C LFH606003C LFH251003CID LFH250303S
LFH250603CID LFH254001C LFH250303P LFH600601CID LFH604001C LFH254003C LFH250301P
LFH600302SID LFH250602CID LFH601001CID LFH600303CID LFH600301SID LFH250301C LFH600602CID
LFR250302S LFH256001C LFH600302CID LFH602001C LFH600301CID LFH250303C LFH250601CID
LFH602003C LFR250302P LFR250603CID LFR600302PID LFR250601CID LFR250303C LFR600303SID
LFR604001C LFR250602CID LFR604003C LFR250301S LFR251001CID LFR600301SID LFR252003C
LFR606003C LFR250303S LFR602003C LFR600303CID LFR601001CID LFR256003C LFR250302C
LFR252001C LFR251003CID LFR600301CID LFR600302SID LFR254001C LFR606001C LFR250301C
LFR601003CID LFR256001C LFR250301P LFR600602CID LFR254003C LFR600603CID LFR600601CID
LFR602001C LFR250303P LFR600303PID