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

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 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)




Catalog Numbers

Catalog Numbers	Rated Current RMS-Amps	I2t(A2 Sec)		Watts Loss
		Pre-arc	Clearingat 500V
FWH-35B	35A	34	150	8
FWH-40B	40A	76	320	7.5
FWH-45B	45A	105	450	7.5
FWH-50B	50A	135	670	7.5
FWH-60B	60A	210	900	9.9
FWH-70B	70A	210	900	10.6
FWH-80B	80A	305	1400	12.7
FWH-90B	90A	360	1600	15
FWH-100B	100A	475	2000	17
FWH-125B	125A	800	3500	25
FWH-150B	150A	1100	4600	30
FWH-175B	175A	1450	6200	35
FWH-200B	200A	1900	8500	40
FWH-225A	225A	4600	23300	39
FWH-250A	250A	6300	32200	41
FWH-275A	275A	7900	40300	46
FWH-300A	300A	9800	49800	51
FWH-325A	325A	13700	63800	53
FWH-350A	350A	14500	72900	58
FWH-400A	400A	19200	96700	65
FWH-450A	450A	24700	127000	74
FWH-500A	500A	29200	149000	84
FWH-600A	600A	41300	206000	108
FWH-700A	700A	55000	298000	120
FWH-800A	800A	76200	409000	129
FWH-1000A	1000A	92000	450000	145
FWH-1200A	1200A	122000	600000	180
FWH-1400A	1400A	200000	1000000	210
FWH-1600A	1600A	290000	1400000	230

• 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

FWH 35-200A(B) & 900-1600A(A): 500V
Time-Current Curve

FWH 35-200A(B) & 900-1600A(A): 500V
Peak Let-Through Curve


FWH 250-800A: 500V
Time-Current Curve

FWH 250-800A: 500V
Peak Let-Through Curve