Ferr ule — FWH 500V: 1-30A
Dimensions - mm (inches)
50.8
(2.000")
15.5
(0.610")
14.3
(0.563")
FWH (14 x 51mm)
Specifications
Description: Ferrule style high
speed fuses.
Dimensions: See dimensions
illustration.
Ratings:
Volts: — 500Vac/dc
Amps: — 1-30A
IR: — 200kA RMS Sym.
— 50kA @500Vdc
Agency Information: CE, UL Recognition 1- 30A & CSA
Component Acceptance: 5 - 30A.
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated
voltage and at power factor
of 15% are given in the elec-
trical characteristics. For
other voltages, the clearing
I2t is found by multiplying by
correction factor, K, given as
a function of applied working
voltage, Eg, (rms).
500400250100
1.5
1.0
0.5
0.3
0.2
0.15 Eg
K
Arc Voltage
This curve gives the peak
arc voltage, UL, which may
appear across the fuse
during its operation as a
function of the applied
working voltage, Eg, (rms)
at a power factor of 15%.
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, Kp, is given as a
function of the RMS load
current, Ib, in % of the rated
current.
Catalog Numbers
Electrical Characteristics
Rated I2t (A2Sec)
Catalog Current Clearing Watts
Numbers Size RMS-Amps Pre-arc at 500V Loss
FWH-1A14F 1 — — —
FWH-2A14F 2 — — —
FWH-3A14F 3 — — 2.3
FWH-4A14F 4 — — —
FWH-5A14F 5 1.6 6.4 1.5
FWH-6A14F 14 x 51mm 6 1.6 6.4 1.5
FWH-10A14F (9⁄16” x 2”) 10 3.6 13 4
FWH-12A14F 12 — — —
FWH-15A14F 15 10 40 5.5
FWH-20A14F 20 26 96 6
FWH-25A14F 25 49 191 7
FWH-30A14F 30 58 232 9
• Watts loss provided at rated current.
• See accessories on page 216.
Features and Benefits
• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I2t)
• Low watts loss in a compact size
• Used with finger-safe holders/blocks
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
UL
2.0
1.6
1.2
103
800
600
500
400
300
100 400300200 500
Eg
Kp
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.1
30 40 50 60 70 80 90 100%
Ib
Data Sheet: 720008
For product da ta sheets, visit www.cooperbussmann.com/datasheets/ulcsa 203
High Speed
Fuses
High Speed Fuses
For product da ta sheets, visit www.cooperbussmann.com/datasheets/ulcsa
204
High Speed Fuses
Ferr ule — FWH 500V: 1-30A
Peak Let-Through Cur ve
2468
10
1
22468 2
10
2
2468
10
3
2
4
6
2
6
4
2
6
4
2
6
4
2
6
4
2
6
4
6
4
2
6
2
4
FWH-5A14F
FWH-10A14F
FWH-15A14F
FWH-20A14F
FWH-25A14F
FWH-30A14F
Virtual Pre-Arcing Time In Seconds
Prospective Current In Amps RMS
10
3
10
0
10
1
10
4
10
2
10–4
10–3
10–2
10–1
FWH 1-30A: 500V (14 x 51mm)
Time-Current Cur ve
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
2
4
2
6
6
4
2
6
4
246 246 246 246
101
102
103
104
101102103104105
FWH-5A14F
FWH-10A14F
FWH-15A14F
FWH-20A14F
FWH-25A14F
FWH-30A14F
2
Data Sheet: 35785298
