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FWX 250V North American High Speed Fuse

  
FWX

Description: North American style stud-mount and flush-end fuses.

Ratings:
Volts: 250Vac/dc
Amps: 35-2500A
IR: 200kA RMS Sym.
Agency Information: CE, UL Recognized & CSA Component Acceptance on 35-800A fuses (20kA IR @250Vdc).

Electrical Characteristics
Total Clearing I2t

The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical 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).



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 char acteristics. 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
Catalog Numbers Rated Current RMS-Amps I2t(A2 Sec) Watts Loss
Pre-arc Clearingat 250V
FWX-35A 35A 50 230 4.2
FWX-40A 40A 60 310 5.2
FWX-45A 45A 80 390 5.7
FWX-50A 50A 100 520 6
FWX-60A 60A 140 740 8.1
FWX-70A 70A 330 1400 7.2
FWX-80A 80A 430 1850 8.1
FWX-90A 90A 570 2450 9
FWX-100A 100A 740 3150 10
FWX-125A 125A 1130 4850 12.5
FWX-150A 150A 1620 6950 15.7
FWX-175A 175A 2170 9300 18.5
FWX-200A 200A 2790 12000 22
FWX-225A 225A 3210 14700 24
FWX-250A 250A 3960 18100 27
FWX-275A 275A 4720 21600 31
FWX-300A 300A 6000 27300 32
FWX-350A 350A 10600 48600 39
FWX-400A 400A 14500 66100 44
FWX-450A 450A 22100 101000 49
FWX-500A 500A 28000 128000 54
FWX-600A 600A 41100 188000 62
FWX-700A 700A 48800 190000 72
FWX-800A 800A 59000 230000 84
FWX-1000AH 1000A 44000 360000 100
FWX-1200AH 1200A 92000 750000 103
FWX-1500AH 1500A 120000 880000 140
FWX-1600AH 1600A 160000 1200000 140
FWX-2000AH 2000A 320000 2300000 151
FWX-2500AH 2500A 670000 4700000 163
• Watts loss provided at rated current.

Features and Benefits
• Excellent DC performance
• Low arc voltage and low energy let-through (I2t)
• Superior cycling capability

Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

FWX 35-800A: 250V
Time-Current Curve

Peak Let-Through Curve

FWX 1000-2500A(H): 250V
Time-Current Curve

Peak Let-Through Curve
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