LITTELFUSE CCMR Datasheet
18
CCMR Series POWR-PRO®CC Fuses
600 V A C■Dual-Element, Time-Delay■2/10 – 60 Amperes
SPECIFICATIONS
Voltage Ratings: AC: 600 V olts
DC: 250 Volts (CCMR 2/10 — 2A)
(CCMR 4 1/2 — 10A)
(CCMR 35 — 60A)
300 Volts (CCMR 2 1/4 — 4A)
500 V olts (CCMR 12 — 30A)
Interrupting Ratings:AC: 200,000 amperes rms symmetrical
300,000 amperes rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
Ampere Range: 2/10 — 60 amperes
Approvals: AC:Standard 248-4, Class CC
UL Listed 2/10 – 30 amps (File No:E81895)
Standard 248, Class CD
UL Listed 35 – 60 amps (File No:E71611)
CSA Certified 2/10 – 60 amps
(File No: LR29862)
DC: Littelfuse self-certified
AMPERE RATINGS
2
⁄
10 123
1
⁄
2 6
1
⁄
4 12 35
1
⁄4 11⁄4 21⁄4 471540
3
⁄10 14⁄10 21⁄2 41⁄2 71⁄2 171⁄2 45
1
⁄
2 1
1
⁄
2 2
8
⁄
10 582050
6
⁄10 16⁄10 35
6
⁄10 92560
8
⁄10 18⁄10 32⁄10 61030
Example part number (series & amperage): CCMR 40
RECOMMENDED FUSE BLOCKS
L60030C series (CCMR 2/10 — 30A)
L60060C series (CCMR 35 — 60A)
Refer to Fuse Block section of this catalog for additional
information.
For space-saving protection of motor circuits up to 40 HP*, we
recommend Littelfuse POWR-PRO
®
CCMR series fuses.
These fuses are the only true dual-element, time-delay fuses
in a package this small that are specifically engineered for
motor branch circuit protection.They provide Type 2 protection (no damage) to both NEMA-rated and the more sensitive
IEC (International Electrotechnical Commission) type motor
circuit components.
Because CCMR fuses are the most current limiting rating for
rating, and because their time-delay characteristics permit the
use of smaller fuse ratings in motor circuits than would be
possible with fast-acting fuses, CCMR fuses provide superior
short-circuit protection. Furthermore, they provide this
superior protection in a fraction of the space required by other
fuse classes. For example, when 600V three-pole, 30 ampere
Class R fuse blocks are replaced by Littelfuse Class CC fuse
blocks, mounting space requirements may be reduced 70%
or more.This is especially important when a panel contains
control devices for many motors.
In addition to the UL Listed smaller sizes, Littelfuse CCMR
series fuses are now available in larger sizes — from 35 to 60
amperes! No other fuse is available with this current
carrying capacity in a package this small. As a matter of
fact, the 60 ampere CCMR fuse is the smallest 60A fuse
available which is rated at 600 volts.
APPLICATIONS
CCMR series fuses are specifically designed to withstand
sustained starting currents of small motors
Provide short-circuit protection for motor branch circuits
Use with IEC- and NEMA-rated motor controllers and
contactors
General purpose circuits up to 60 amps
FEATURES/BENEFITS
■
Space savings — No other fuse class approved for
branch-circuit protection has a 600 volt rating and 300,000
A.I.R. in a package this small.
■
Extremely current-limiting — Reduces damage caused
by heating and magnetic effects of short-circuit currents —
stops damaging short-circuit currents faster than any
mechanical protective device.
■
Excellent time delay — Eliminates needless downtime
caused by power surges or equipment demands .. .
permits selection of fuse sizes closer to actual load
conditions — provides better protection.
■
300kA Interrupting Rating — Littelfuse self-certified to
300,000 amperes as standard. Meets future trend towards
higher available short circuit currents.
*Consult the Motor Protection Tables in the Fuseology section for
specific motor sizing information
19
CCMR Series POWR-PRO®CC Fuses
600 V A C■Dual-Element, Time-Delay■2/10 – 60 Amperes
Short Circuit
Let-Thru Current** For Various Fuse Ratings
Current* 2A 4A 6
1
⁄4 A 10A 12A 15A 20A 30A
5,000 160 190 330 370 525 600 625 750
10,000 180 220 400 440 600 700 725 875
15,000 200 250 430 480 675 775 800 950
20,000 220 260 460 520 720 825 850 1,000
25,000 230 280 480 550 750 850 900 1,050
30,000 240 290 500 570 800 900 950 1,125
35,000 245 300 520 590 825 925 975 1,175
40,000 255 310 550 600 850 975 1,000 1,200
50,000 260 330 570 640 875 1,000 1,100 1,300
60,000 280 340 600 670 900 1,050 1,125 1,350
80,000 300 360 625 700 1,000 1,125 1,200 1,400
100,000 310 380 650 750 1,050 1,200 1,250 1,500
150,000 340 420 700 800 1,150 1,300 1,400 1,600
200,000 350 440 750 850 1,200 1,400 1,450 1,750
Current-Limiting Effects of CCMR (600V) fuses
* Prospective RMS
Symmetrical Amperes
Short-Circuit Current
** Apparent RMS
Symmetrical
Note: Data derived from
Peak Let-Thru Curves
1.50"
(38.1 mm)
.50"
(12.7 mm)
.41"
(10.3 mm)
.25"
(6.4 mm)
.125"
(3.2 mm)
0-30A
35-60A
1.880 REF.
.850
+
.020
-
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
TIME IN SECONDS
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
.1.2.3.4.6
.08
.05
1/4A
1/2A
8/10A1A1 1/4A
1 1/2A
1
.8
CURRENT IN AMPERES
2A
2 1/2A3A3 1/2A4A6A8A10A
1 8/10A
23468
12A
15A
20A
25A
30A
35A
1020304060
60A
80
100
200
300
400
600
800
1000
1000000
800000
600000
400000
300000
200000
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
PEAK LET-THRU IN AMPERES
1000
800
600
400
300
200
100
100
200
300
400
600
800
2000
3000
1000
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
60A
30A
20A
15A
12A
10A
6 1/4A
4A
2A
200000
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