POWR-PRO® Fuses
20
POWR-PRO® Fuses
www.littelfuse.com © 2005 Littelfuse • POWR-GARD™ Products Catalog
CCMR Series POWR-PRO® Class CC and CD Fuses
600 VAC • Dual-Element, Time-Delay • 2/10 – 60 Amperes
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 that come in a small
package specifically en gi neered for motor branch circuit pro tec tion.
CCMR series fuses pro vide Type 2 “No Damage” pro tec tion to both
NEMA-rated and the more sensitive IEC (International Electrotechnical
Com mis sion) type motor circuit com po nents.
Rating for rating, CCMR fuses are the most current-limiting fuses
available. They also provide superior short-circuit protection since their
time-delay characteristics permit the use of smaller fuse ratings in motor
circuits than would be possible if using fast-acting fuses. CCMR series
fuses provide superior pro tec tion 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 re duced 70% or more. This is especially
im por tant 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. In fact, the 60 ampere CCMR fuse is the smallest 60A
fuse available 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 such a small
package.
• Extremely current-limiting — Reduces dam age caused by heating
and magnetic effects of short-circuit currents. Stops damaging short-
circuit currents faster than any me chan i cal protective device.
• Excellent time-delay — Eliminates needless down time caused by
power surges or equip ment demands. Permits selection of fuse sizes
closer to actual load conditions, which provides better protection.
• 300kA Interrupting Rating — Littelfuse self-certified to 300,000
am peres 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
Specifications
Voltage Ratings: AC: 600 Volts
DC: 250 Volts (CCMR
2⁄10 — 2A)
(CCMR 41⁄2 — 10A)
(CCMR 35 — 60A)
300 Volts (CCMR 21⁄4 — 4A)
500 Volts (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: E81895)
CSA Certified
2⁄10 – 60 amps
(File No: LR29862)
DC: Littelfuse self-certified
Ampere Ratings
2⁄10 123
1⁄261⁄412 35
1⁄411⁄421⁄4471540
3⁄10 14⁄10 21⁄241⁄271⁄2171⁄245
1⁄211⁄228⁄10 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
LPSC (CCMR 2⁄10 — 30A)
L60030C series (CCMR 2⁄10 — 30A)
L60060C series (CCMR 35 — 60A)
Refer to Blocks & Holders section of this catalog for additional in for ma tion.
POWR-PRO® Fuses
21
POWR-PRO® Fuses
www.littelfuse.com
© 2005 Littelfuse • POWR-GARD™ Products Catalog
CCMR Series POWR-PRO® Class CC and CD Fuses
600 VAC • Dual-Element, Time-Delay • 2/10 – 60 Amperes
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
100
200
300
400
600
800
1000
100
200
300
400
600
800
1000
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
300000
400000
600000
800000
1000000
60A
30A
20A
15A
12A
10A
6 1/4A
4A
2A
Current-Limiting Effects of CCMR (600V) fuses
1.880"
(47.8 mm)
.850"
(21.6 mm)
1.50"
(38.1 mm)
.50"
(12.7 mm)
.41"
(10.3 mm)
.25"
(6.4 mm)
.125"
(3.2 mm)
35-60A
0-30A
1000
800
600
400
300
200
100
80
60
40
30
20
10
8
6
4
3
2
1
.8
.6
.4
.3
.2
.1
.08
.06
.04
.03
.02
.01
2
3
4
6
8
10
20
30
40
60
80
100
200
300
400
600
800
1000
.08
.1
.2
.3
.4
.6
.8
1
.05
1/4A
1/2A
8/10A
1A
1 1/4A
1 1/2A
1 8/10A
2A
2 1/2A
3A
3 1/2A
4A
6A
8A
10A
12A
15A
20A
25A
30A
35A
60A
TIME IN SECONDS
CURRENT IN AMPERES
Short Circuit Current* Apparent RMS Symmetrical For Various Fuse Ratings
2A 4A 61⁄4A10A 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
*Prospective RMS Symmetrical Amperes Short-Circuit Current
Note: Data Derived from Peak Let-Thru Curves
