Description: North American style high speed semiconductor stud-mount fuses.
Ratings:
Volts: 500Vac/dc
Amps: 35-1600A
IR: 200kA Sym. 50kA@ 500Vdc
Agency Information: CE, UL Recognition & CSA Component Acceptance on 35-800A only (50kA IR@500Vdc). UL Recognition on 35-1200A only, CSA Component Acceptance: 35-1600A.
Electrical Characteristics
Total Clearing I2t
![](/uploads/spec-pics/201303A/FWH-35B-40B-total-clearing-i2t.jpg)
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
![](/uploads/spec-pics/201303A/FWH-45B-50B-arc-voltage.jpg)
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
![](/uploads/spec-pics/201303A/FWH-80B-90B-100B-power-loss.jpg)
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.
Dimensions (in)
![](/uploads/spec-pics/201303A/FWH-100B-125B-dimensions.jpg)
![](/uploads/spec-pics/201303A/FWH-150B-175B-fig1.jpg)
![](/uploads/spec-pics/201303A/FWH-200B-225A-fig2.jpg)
Catalog Numbers
Catalog Numbers | Rated Current RMS-Amps | I2t(A2 Sec) | Watts Loss | |
Pre-arc | Clearingat 500V | |||
FWH-35B | 35 | 34 | 150 | 8 |
FWH-40B | 40 | 76 | 320 | 7.5 |
FWH-45B | 45 | 105 | 450 | 7.5 |
FWH-50B | 50 | 135 | 670 | 7.5 |
FWH-60B | 60 | 210 | 900 | 9.9 |
FWH-70B | 70 | 210 | 900 | 10.6 |
FWH-80B | 80 | 305 | 1400 | 12.7 |
FWH-90B | 90 | 360 | 1600 | 15 |
FWH-100B | 100 | 475 | 2000 | 17 |
FWH-125B | 125 | 800 | 3500 | 25 |
FWH-150B | 150 | 1100 | 4600 | 30 |
FWH-175B | 175 | 1450 | 6200 | 35 |
FWH-200B | 200 | 1900 | 8500 | 40 |
FWH-225A | 225 | 4600 | 23300 | 39 |
FWH-250A | 250 | 6300 | 32200 | 41 |
FWH-275A | 275 | 7900 | 40300 | 46 |
FWH-300A | 300 | 9800 | 49800 | 51 |
FWH-325A | 325 | 13700 | 63800 | 53 |
FWH-350A | 350 | 14500 | 72900 | 58 |
FWH-400A | 400 | 19200 | 96700 | 65 |
FWH-450A | 450 | 24700 | 127000 | 74 |
FWH-500A | 500 | 29200 | 149000 | 84 |
FWH-600A | 600 | 41300 | 206000 | 108 |
FWH-700A | 700 | 55000 | 298000 | 120 |
FWH-800A | 800 | 76200 | 409000 | 129 |
FWH-1000A | 1000 | 92000 | 450000 | 145 |
FWH-1200A | 1200 | 122000 | 600000 | 180 |
FWH-1400A | 1400 | 200000 | 1000000 | 210 |
FWH-1600A | 1600 | 290000 | 1400000 | 230 |
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
FWH 35-200A(B) & 900-1600A(A): 500V
Time-Current Curve
![](/uploads/spec-pics/201303A/FWH-250A-275A-time-current-curve.jpg)
FWH 35-200A(B) & 900-1600A(A): 500V
Peak Let-Through Curve
![](/uploads/spec-pics/201303A/FWH-300A-350A-Peak-Let-Through-Curve.jpg)
FWH 250-800A: 500V
Time-Current Curve
![](/uploads/spec-pics/201303A/FWH-400A-450A-time-current-curve.jpg)
FWH 250-800A: 500V
Peak Let-Through Curve
![](/uploads/spec-pics/201303A/FWH-500A-800A-Peak-Let-Through-Curve.jpg)