Bussmann
®
Limitron
®
Fast-Acting, Class L Fuses
600 Volt
Dimensional Data
*All other tolerances (±0.02)
.88"
1.75"
1.38"
1.63"
1.75"
.88"
1.38"
KTU
601-6000A
.81"
.63" (± 0.03)
All Slots and Holes
801A
to
1200A
1350A
to
1600A
1800A
to
2000A
8.63"
(±0.09)
6.75"
10.75"
(±0.09)
5.75"
2001A
to
2500A
3000A
3500A
to
4000A
4500A
to
5000A
601A
to
800A
6000A
6.75"
3.75"
.38"
.38"
.44"
.5"
.75"
.75"
.75"
1"
1"
Terminals:
Width (±0.06)
Thickness (±0.03)
2"
2.5"
2"
2.5"
2.38"
3"
2.75"
3.5"
3.5"
5"
4"
5"
4.75"
5.75"
5.25"
6.25"
5.75"
7.13"
Catalog Symbol:
KTU
Fast-Acting
Current-Limiting
Ampere Rating:
601 to 6000 Amperes
Voltage Rating:
600 Volts AC (or less)
Interrupting Rating:
200,000 RMS Sym.
Bolt Mount
Agency Approvals:
UL Listed, Std. 248-10, Class L, Guide JDDZ, File E4273
CSA Certified, C22.2 No. 248.10, Class 1422-02, File 53787
Ampere Ratings (600 VAC)†
Catalog
Number
KTU-601
KTU-650
KTU-700
KTU-750
KTU-800
KTU-850
KTU-900
KTU-1000
KTU-1200
KTU-1350
KTU-1400
KTU-1500
KTU-1600
†601-3000A is rated 340 VDC and 50 KAIC.
*
Weight per carton.
1
6
2.721
1
4.25
1.927
1
3.75
1.70
Ctn.
Qty.
Weight*
Lbs.
Kg.
Catalog
Number
KTU-1800
KTU-2000
KTU-2001
KTU-2500
KTU-3000
KTU-3500
KTU-4000
KTU-4500
KTU-5000
KTU-6000
1
1
1
1
17.25
24
31
34
7.824
10.886
14.061
15.422
1
17
7.711
Ctn.
Qty.
1
Weight*
Lbs.
8.5
Kg.
3.855
General Information:
• Fast-acting, short-circuit protection. Particularly suited for pro-
tection of circuit breakers with lower interrupting ratings and
non-inductive loads such as lighting and heating circuits.
• 99.9% pure silver-links provide low watt loss and low
operating temperature on normal current levels; minmizes
total clearing I
2
t fault energy let-through.
• High grade silica-sand filler accelerates response of fuse to
short-circuits by having a quenching effect upon the fuse arc.
• O-ring seals maximize pressure build-up during current-
limiting actions and ensure filler retention.
• Silver-plated micro-peened terminals provide high electrical
conductivity, minimize heat generation, and keep fuses and
switches cool.
• UL interrupting rating of 200,000 amperes.
• Selective coordination (blackout prevention).
• Glass melamine tube.
• Silver-plated end bells.
• No fuse reducers available.
Fuseblocks (601 - 1200A):
Catalog Number
51215
51235
Poles
1
3
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 314-527-1270 for more information.
12-21-98
SB98107
Rev. A
Form No. KTU
Page 1 of 2
BIF Doc #1010
Bussmann
®
Limitron
®
Fast-Acting, Class L Fuses
600 Volt
Current-Limitation Curves
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
400,000
B
6000
5000
4000
3000
2500
2000
1600
1200
800
601
AMPERE
RATING
300
1200A
1350A
1600A
2000A
3000A
4000A
5000A
6000A
800A
KTU
601-6000A
Time-Current Characteristic Curves–Average Melt
AMPERE
RATING
100,000
100
10,000
10
10,000
100,000
200,000
1,000
1,000
TIME IN SECONDS
A
1
PROSPECTIVE SHORT-CIRCUIT CURRENT
SYMMETRICAL RMS AMPERES
.1
10,000
CURRENT IN AMPERES
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained
in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
100,000
Form No. KTU
Page 2 of 2
BIF Doc #1010
12-21-98
SB98107
Rev. A
1,000
.01
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