FWX-1200AH Cooper/Bussmann, FWX-1200AH Datasheet - Page 2

• Manufacturer Part Number: FWX-1200AH
• Description: FUSE 1200A 250V
• Manufacturer: Cooper/Bussmann
• Series: FWXr
• Type: Blader

Specifications of FWX-1200AH

• Fuse Type: Fast Acting
• Voltage - Rated: 250VAC, 250VDC
• Current: 1.2kA
• Package / Case: Cylindrical
• Size / Dimension: 3.000" Dia x 2.590" L (76.20mm x 65.79mm)
• Mounting Type: Holder
• Melting I²t: 750000
• Voltage Rating (vac): 250V
• Current Rating: 1200A
• Power Dissipation: 103W
• Mounting: Flange
• Product Depth (mm): Not Requiredmm
• Product Height (mm): Not Requiredmm
• Voltage Rating: 250 Volts
• Termination Style: Flat
• Dimensions: 2 19/32 in L x 3 in W
• Product: Semiconductor Fuse
• Interrupt Rating: 200 KAmps
• Mounting Style: Flush
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Color: -
• Lead Free Status / Rohs Status: Details

Total Clearing I
The total clearing I
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I
plying by correction factor, K, given as
a function of applied working voltage,
E
Dimensions
Order #
FWX-35A-60A
FWX-70A-200A
FWX-225A-600A
FWX-700A-800A
FWX-1000AH-1200AH
FWX-1500AH-2500AH
FWX 250V
Electrical Characteristics
Fig. 1: 35-800 Amp Range
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.
1.5
1.0
0.5
0.3
0.2
0.15
7-11-01
A
g
, (RMS).
D
Dimension in inches.
1mm = 0.0394∑
75
H
1) 35-800 Amp Range
2) 1000-2500 Amp Range
E
K
1)
2)
C
125
G
F
B
SB01191
J
200
1∑ = 25.4mm
2
2
t at rated voltage and
2
t is found by multi-
t
Fig.
250
1
1
1
1
2
3
E
3.19
3.13
3.84
3.84
2.59
2.59
300
g
A
35-2500A
0.81
1.22
1.50
2.00
3.00
3.50
B
Arc Voltage
This curve gives the peak arc voltage,
U
during its operation as a function of the
applied working voltage, E
power factor of 15%.
1.4
1.2
10
800
600
500
400
300
200
Fig. 2: 1000-1200 Amp Range
L
3
B
1.59
1.59
1.59
1.59
1.50
1.50
A
, which may appear across the fuse
50
1) 35-800 Amp Range
2) 1000-2500 Amp Range
C
U
1)
L
100
2.59
2.44
2.94
3.03
1.50
—
D
2)
150
C
2.25
2.19
2.25
2.28
—
—
E
200
E
g
g
, (RMS) at a
0.34
0.34
0.41
0.41
250
—
—
F
0.63
1.00
1.00
1.50
—
—
G
Power Losses
Watts loss at rated current is given in
the electrical characteristics. The curve
allows the calculation of the power
losses at load currents lower than the
rated current. The correction factor, K
is given as a function of the RMS load
current, I
Fig. 3: 1500-2500 Amp Range
1.0
0.8
0.6
0.5
0.4
0.3
0.2
0.1
A
B
30 40 50
0.13
0.19
0.25
0.25
K
—
—
H
p
b
D
, in % of the rated current .
0.52
0.47
0.75
0.78
—
—
J
60
C
Bussmann
70
Tapped ‹Ω • ∑-24 ≈ ⁄Ω ™ ∑
Tapped ‹Ω • ∑-24 ≈ ⁄Ω ™ ∑
80 90 100%
Thread Depth
Form No.FWX 250
BIF Doc #720005
—
—
—
—
I
®
b
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p
†
®
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