12/04
CORRECTION FACTOR FOR WATTS LOSS
American Round Fuses
Form 101 Range
A50QS
SCAC13
Semiconductor (A) fuses
Semiconductor (AC) fuses
Ampere Catalog Reference Ampere Catalog Reference
Rating Number Number Rating Number Number
Standard Fuse Ampere Ratings, Catalog Numbers
For ampere ratings and styles not listed, call Technical Services.
35 A50QS35-4 Q214834 250 A50QS250-4 W211251
40 A50QS40-4 Y215853 300 A50QS300-4 D212799
50 A50QS50-4 W217392 350 A50QS350-4 T215343
60 A50QS60-4 A218937 400 A50QS400-4 B216362
70 A50QS70-4 B222664 450 A50QS450-4 E216871
80 A50QS80-4 L201513 500 A50QS500-4 L218418
90 A50QS90-4 X211252 600 A50QS600-4 Q219457
100 A50QS100-4 A216361 700 A50QS700-4 N223181
125 A50QS125-4 K218417 800 A50QS800-4 C202287
150 A50QS150-4 P219456 900 A50QS900-4 R212282
175 A50QS175-4 A222663 1000 A50QS1000-4 V217391
200 A50QS200-4 T200968 1200 A50QS1200-4 C217904
225 A50QS225-4 K201512
Ampere Watts Ampere Watts
Rating Loss (W) Rating Loss (W)
35 6 250 41
40 7 300 49
50 8 350 57
60 10 400 65
70 12 450 69
80 14 500 77
90 15 600 92
100 17 700 110
125 21 800 130
150 25 900 140
175 29 1000 160
200 33 1200 175
225 37
Dimensions
Catalog Mounting Dimensions - Inches (mm)
Number Type A B C D E F G H
A50QS35 to 100 4 3.63 1.00 2.13 2.94 2.75 0.31 0.75 0.13
(92.2) (25.4) (54.1) (74.7) (69.9) (7.9) (19.1) (3.3)
A50QS125 to 200 4 3.63 1.22 2.13 2.94 2.81 0.31 1.00 0.19
(92.2) (31.0) (54.1) (74.7) (71.4) (7.9) (25.4) (4.8)
A50QS225 to 400 4 4.34 1.50 2.09 3.41 2.78 0.41 1.00 0.25
(110) (38.1) (53.1) (86.6) (70.6) (10.4) (25.4) (6.4)
A50QS450 to 600 4 4.47 2.00 2.22 3.53 2.91 0.41 1.50 0.25
(114) (50.8) (56.4) (89.7) (73.9) (10.4) (38.1) (6.4)
A50QS700 to 800 4 6.47 2.50 2.22 5.00 3.44 .53 1.50 .25
(164.3) (63.5) (56.4) (127.0) (87.3) (13.5) (38.1) (6.4)
A50QS900 to 1200 4 6.97 3.00 3.22 5.47 4.47 .63 2.38 .44
(177.0) (76.2) (81.8) (138.9) (113.5) (15.9) (60.3) (11.1)
PERCENT RATED CURRENT
Watts Loss vs. Percent Rated Current
Watts Loss at Rated Current
Correction factor example:
At 80% rated current, watts loss equals .
54 times watts loss at rated current.
Semiconductor Protection Fuses