BCCM6033SQ Cooper/Bussmann, BCCM6033SQ Datasheet - Page 218

• Manufacturer Part Number: BCCM6033SQ
• Description: FUSEBLOCK CLASS CC 13/32X1-1/2"
• Manufacturer: Cooper/Bussmann
• Series: BCCMr
• Type: Blockr

Specifications of BCCM6033SQ

• Fuse Size: Class CC
• Number Of Circuits: 3
• Mounting Type: Chassis Mount
• Termination Style: Screw Terminal
• Current Rating: 20A
• Product: Block
• Fuse Size / Group: Class CC
• Voltage Rating: 600 Volts
• Mounting Style: Screw
• Body Material: Thermoplastic
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Fuse Time-Current Curves
When a low level overcurrent occurs, a long interval of time will
be required for a fuse to open (melt) and clear the fault. On the
other hand, if the overcurrent is large, the fuse will open very
quickly. The opening time is a function of the magnitude of the
level of overcurrent. Overcurrent levels and the corresponding
intervals of opening times are logarithmically plotted in graph
form as shown to the right. Levels of overcurrent are scaled on
the horizontal axis; time intervals on the vertical axis. The curve is
thus called a “time-current” curve.
This particular plot reflects the characteristics of a 200A, 250V,
LOW-PEAK YELLOW dual-element fuse. Note that at the 1,000A
overload level, the time interval which is required for the fuse to
open is 10 seconds. Yet, at approximately the 2,200A overcur-
rent level, the opening (melt) time of a fuse is only 0.01 seconds.
It is apparent that the time intervals become shorter as the over-
current levels become larger. This relationship is termed an
inverse time-to-current characteristic. Time-current curves are
published or are available on most commonly used fuses show-
ing “minimum melt,” “average melt” and/or “total clear” charac-
teristics. Although upstream and downstream fuses are easily
coordinated by adhering to simple ampere ratios, these time-cur-
rent curves permit close or critical analysis of coordination.
Better Motor Protection in Elevated Ambients
The derating of dual-element fuses based on increased ambient
temperatures closely parallels the derating curve of motors in ele-
vated ambient. This unique feature allows for optimum protection
of motors, even in high temperatures.
Affect of ambient temperature on operating characteristics of FUSETRON
and LOW-PEAK YELLOW Dual-Element Fuses.
214
Fuse Technology
150
140
130
120
110
100
(–60°C)
90
80
70
60
50
40
30
–76°F
(–40°C)
–40°F
(–20°C)
Affect on
Opening Time
–4°F
–32°F
(0°C)
AMBIENT
(20°C)
68°F
Affect on Carrying
Capacity Rating
(40°C)
104°F
(60°C)
140°F
(80°C)
176°F
(100°C)
212°F
400
300
200
100
.08
.06
.04
.03
.02
.01
80
60
40
30
20
10
.8
.6
.4
.3
.2
.1
8
6
4
3
2
1
CURRENT IN AMPERES
LOW-PEAK YELLOW
LPN-RK200 SP (RK1)
Bussmann
®