Page 15 - Ferraz semiconductor UL

Semiconductor (A) fuses
Semiconductor (AC) fuses

American Round Fuses

Form 101 Range
A50QS

Semiconductor Protection Fuses

I t Data – 500 Volts AC
2
2
I t data
Melting
Fuse Max Clearing I t @ 500 VAC
2
I t
2
Ampere
2
3
(A s X 10 ) 1 fuse (fig A) 2 Fuses in series
Rating
3
2
3
2
(A s X 10 ) (A s X 10 )(fig B) 500 VAC Fault Load 500 VAC Fault Load
35 .09 .56 .34
40 .11 .69 .4
Fig. A Fig. B
50 .18 1.1 .68
60 .25 1.6 .94
70 .31 1.9 1.1
2
80 .43 2.6 1.5 Clearing I t vs. AC Operating Voltage
90 .57 3.6 2.1
100 .74 4.4 2.7
125 .94 5.6 3.4
150 1.5 9 5.4
175 2.5 15 9
200 3.3 20 12
225 4.1 25 15
250 4.9 29 18
300 9.2 55 33 CORRECTION FACTOR FOR I 2 T
350 15 88 53
400 16 98 59
450 21 130 76
500 26 160 94
600 37 220 130
700 53 270 160
800 72 360 220
900 98 500 300
1000 112 560 330
1200 200 930 550 OPERATING VOLTAGE (AC RMS VOLTS)
2
Clearing I t at 500V DC, DC Voltage Capability vs. Time Constant
100kA, L/R = 10 ms

2
Ampere Clearing I t Ampere Clearing I t
2
2
3
Rating (A s X 10 ) Rating (A s X 10 )
3
2
35 .48 250 25
40 .58 300 47
50 1.0 350 75
60 1.3 400 83
70 1.6 450 110
80 2.2 500 130 DC VOLTAGE CAPABILITY
90 3.0 600 190
100 3.8 700 220
125 4.8 800 260
150 7.7 900 350
175 13 1000 430
200 17 1200 660
DC Application: A50QS Fuses have been designed for
both AC and DC operation. A50QS fuses (70-600) have
UL Component Recognition at 500V DC and have been
tested to circuit parameters as defined in Standard 198L.
L/R TIME CONSTANT (MS)

SCAC15
12/04