Description:
North American style stud-mount fuses.

Ratings:
Volts: 1000Vac
Amps: 35-2000A
IR: 25kA (35-200A); 100kA (250-2000A); 50kA@ 800Vdc (35-200A, 450-600A)

Agency Information: CE, UL Recognition File E91958 on 35-600A only.

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.

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

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

Dimensions (in)

Amp rating	A	B	C	D	E	F	G	H	I
35A-60A	5.000	0.940	3.110	4.235	4.180	0.352	0.750	0.125	0.380
70A-100A	4.932	1.125	3.085	4.266	4.156	0.352	1.000	0.188	0.407
125A-200A	5.685	1.526	3.261	4.803	4.055	0.445	1.000	0.250	0.819
250A-400A	5.768	2.000	3.500	4.811	4.150	0.433	1.500	0.250	0.764
500A-600A	7.201	2.500	3.465	5.984	4.706	0.562	2.000	0.375	1.201
800A-2000A	6.811	3.500	3.312	5.472	4.962	0.625	2.750	0.500	0.880

1mm = 0.0394” / 1” = 25.4mm


Catalog Numbers

Catalog Numbers	Electrical Characteristics			Watts Loss
	Rated Current RMS-Amps	I2T(A2 Sec)
		Pre-arc	Clearing at 1000V
FWJ-35A	35A	210	2000	7
FWJ-40A	40A	300	2500	8
FWJ-50A	50A	470	3500	10
FWJ-60A	60A	670	5000	11
FWJ-70A	70A	1100	6900	12
FWJ-80A	80A	1550	9700	13
FWJ-90A	90A	1900	12000	14
FWJ-100A	100A	2800	17500	15
FWJ-125A	125A	4800	35000	16
FWJ-150A	150A	6300	45000	25
FWJ-175A	175A	7500	65000	30
FWJ-200A	200A	11700	80000	32
FWJ-250A	250A	16000	112000	50
FWJ-300A	300A	23500	164000	56
FWJ-350A	350A	33000	231000	62
FWJ-400A	400A	47000	330000	67
FWJ-500A	500A	39500	329000	95
FWJ-600A	600A	61000	520000	105
FWJ-800A	800A	87000	500000	182
FWJ-1000A	1000A	190000	1100000	206
FWJ-1200A	1200A	370000	2100000	240
FWJ-1400A	1400A	470000	2700000	248
FWJ-1600A	1600A	700000	4000000	267
FWJ-1800A	1800A	925000	5300000	239
FWJ-2000A	2000A	1330000	7600000	244

• Watts loss provided at rated current.

Time-Current Curve



Peak Let-Through Curve