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LDC Series
LDC Series POWR-PRO ® Class L Fuses
600 V AC/DC Time-Delay • 150 – 2000 Amperes
constants. This makes the fuse uniquely suited for applications such
as crane rail circuits and mass transit systems. Contact the factory for
application information.
For AC only systems, consider the use of POWR-PRO KLPC series
fuses. They have a full 10 seconds time-delay at 500% rated current,
and have a wider range of ratings.
Applications
UPS protection, especially for large battery circuits
DC distribution
DC variable speed drives
Protection of crane rail circuits and other large DC equipment such as
electrical power shovels, ship and dock cranes, etc.
Mass transit systems, including new light rail applications
General purpose AC/DC circuits for mains, feeders, and branch circuits
Features/Benefits
Littelfuse POWR-PRO LDC series Class L fuses represent another
first in fuse protection. LDC series fuses are the first UL Listed 600
volts AC and DC Class L fuses. Since they may be used for both
AC and DC, they eliminate the concern that AC only fuses may be
inserted into DC circuits.
• 600 Volt AC/DC rated — “All-purpose” Class L fuses reduce
inventory requirements because the need for separate AC and DC
fuses is eliminated.
• UL Listed 200,000 A.I.R. AC – 50,000 A.I.R. DC — Reliable
interruption of all overcurrents up to their ratings. Minimizes the need
for time consuming and expensive short-circuit studies.
• Moderate time-delay — Four seconds time-delay at 500% current
provides adequate time-delay for many AC applications and most
DC applications. They will withstand most harmless overloads or line
surges. If your needs exceed the LDC capabilities, consider the use
of KLPC fuses for AC applications.
• Selective coordination — LDC series fuses coordinate well with all
Littelfuse fuses rated 600 amperes or less. A combination of LDC
and IDSR series fuses provide a complete 600 volt rated DC system.
• Extremely current-limiting — Maximum current limitation reduces
damage to circuits and equipment under short-circuit conditions.
Stops damaging short-circuits faster than any mechanical protective
device.
While LDC series fuses UL Listed DC interrupting rating is more than
adequate for most applications (50,000 amperes at a 16 millisecond
time constant), tests in our high power laboratory have shown that
this remarkable fuse is capable of performing at much longer time
Specifications
Ampere Ratings
Voltage Ratings:
AC: 600 Volts
150
450
750
1300
1900
DC: 600 Volts
200
500
800
1350
2000
Interrupting Ratings:
AC: 200,000 amperes rms symmetrical
250
600
900
1400
DC: 50,000 amperes
300
601
1000
1500
(16 millisecond time-constant)
350
650
1100
1600
Ampere Range:
150 – 2000 amperes
400
700
1200
1800
Approvals:
Standard 248-10, Class L
UL Listed 601 – 2000 amps (File No: E81895)
Example part number (series & amperage): LDC 1200
UL Recognized 150 – 600 amps
Dimensions
(File No: E71611)
CSA Certified 150 – 2000 amps
(File No: LR29862)
Please refer to the KLPC dimensions
© 2005 Littelfuse • POWR-GARD ™ Products Catalog
POWR-PRO ® Fuses
LDC Series POWR-PRO ® Class L Fuses
600 V AC/DC Time-Delay • 150 – 2000 Amperes
Current-Limiting Effects of LDC (600V) Fuses
Short-Circuit Current*
Apparent RMS Symmetrical for Various Fuse Ratings
00A
00A
00A
000A
5,000
5,000
5,000
5,000
5,000
0,000
8,500
10,000
10,000
10,000
5,000
9,750
14,000
15,000
15,000
0,000
10,500
15,000
19,000
20,000
5,000
11,500
16,000
21,000
25,000
30,000
12,000
17,000
22,000
26,000
35,000
12,500
18,000
23,000
28,000
0,000
13,500
19,000
24,000
30,000
50,000
14,000
21,000
26,000
32,000
0,000
15,000
22,000
28,000
34,000
0,000
16,000
24,000
30,000
36,000
00,000
18,000
25,000
33,000
40,000
50,000
20,000
30,000
38,000
44,000
00,000
23,000
32,000
41,000
46,000
* Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data Derived from Peak Let-Thru Curves
1000
800
600
400
300
200
1000000
800000
600000
400000
300000
200000
100
80
60
40
30
20
100000
2000A
1600A
1200A
800A
60000
40000
30000
10
8
6
4
3
2
20000
10000
6000
4000
1
.8
.6
.4
.3
.2
3000
2000
1000
600
.1
.08
.06
.04
.03
.02
400
300
200
100
.01
CURRENT IN AMPERES
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
80000
8000
800