Semiconductor (A)(AC)fuses Semiconductor fuses American Round Fuses Form 101 Range A50QS Semiconductor Protection Fuses (R) A50QS Amp-trap Form 101 fuses grew out of the need to improve the overall performance of semiconductor fuses in response to new equipment requirements. The A50QS encompasses the best protection features - lower I2t to provide better protection for equipment, longer life when subjected to cyclic loading and lower watts loss. A50QS is today's best choice for the protection of dynamic solid state equipment such as motor drives, inverters, UPS, etc Features/Benefits * Lowest l2t for greatest protection of semiconductor circuits * low watt loss for cooler operation * Superior cycling ability gives an equipment design advantage * State of the art protection for 500 volt equipment * ultra compact sizes allow down-sizing of existing equipment Ratings Approvals Highlights Applications * AC: 35-60A 500VAC, 200kA I.R. * UL Recognized Component * AC: UL Guide No. JFHR2 * Protection of 500V or less motor drives, UPS, inverters, etc. 70-1200A 500VAC, 200kA I.R. * * * * * DC: 35-1200A 500VDC,100kA I.R. * DC Tested to UL Standard 198L parameters (70-1200A) 500V AC/DC Rated Lowest l2t Low Watts Loss Superior Cycling Ability Catalog Numbering System * CSA Certified LR12636 A Amp-trap(R) Fuse Single Pole Fuse Blocks for A50QS Fuses 50 Style QS Mounting Types* Blades, bolt-in Fuse Ampere Rating Mounting type Catalog Number Fuse block Reference Number 35-200 225-600 4 4 P243E P266C X222016 K212897 SCAC12 A Rated Volts - 500 Amperes* 50 QS 250 - 4 250 4 * For ampere ratings and types not listed, call Technical services. 07/05 Semiconductor Semiconductor (AC) fuses (A) fuses American Round Fuses Form 101 Range A50QS Semiconductor Protection Fuses Standard Fuse Ampere Ratings, Catalog Numbers Ampere Rating Catalog Number Reference Number Ampere Rating Catalog Number Reference Number 35 40 50 60 70 80 90 100 125 150 175 200 225 A50QS35-4 A50QS40-4 A50QS50-4 A50QS60-4 A50QS70-4 A50QS80-4 A50QS90-4 A50QS100-4 A50QS125-4 A50QS150-4 A50QS175-4 A50QS200-4 A50QS225-4 Q214834 Y215853 W217392 A218937 B222664 L201513 X211252 A216361 K218417 P219456 A222663 T200968 K201512 250 300 350 400 450 500 600 700 800 900 1000 1200 A50QS250-4 A50QS300-4 A50QS350-4 A50QS400-4 A50QS450-4 A50QS500-4 A50QS600-4 A50QS700-4 A50QS800-4 A50QS900-4 A50QS1000-4 A50QS1200-4 W211251 D212799 T215343 B216362 E216871 L218418 Q219457 N223181 C202287 R212282 V217391 C217904 For ampere ratings and styles not listed, call Technical Services. Dimensions Catalog Number Mounting Type A50QS35 to 100 4 A50QS125 to 200 4 A50QS225 to 400 4 A50QS450 to 600 4 A50QS700 to 800 4 A50QS900 to 1200 4 A B C 3.63 (92.2) 3.63 (92.2) 4.34 (110) 4.47 (114) 6.47 (164.3) 6.97 (177.0) 1.00 (25.4) 1.22 (31.0) 1.50 (38.1) 2.00 (50.8) 2.50 (63.5) 3.00 (76.2) 2.13 (54.1) 2.13 (54.1) 2.09 (53.1) 2.22 (56.4) 2.22 (56.4) 3.22 (81.8) Dimensions - Inches (mm) D E Watts Loss vs. Percent Rated Current 2.75 (69.9) 2.81 (71.4) 2.78 (70.6) 2.91 (73.9) 3.44 (87.3) 4.47 (113.5) G H 0.31 (7.9) 0.31 (7.9) 0.41 (10.4) 0.41 (10.4) .53 (13.5) .63 (15.9) 0.75 (19.1) 1.00 (25.4) 1.00 (25.4) 1.50 (38.1) 1.50 (38.1) 2.38 (60.3) 0.13 (3.3) 0.19 (4.8) 0.25 (6.4) 0.25 (6.4) .25 (6.4) .44 (11.1) CORRECTION FACTOR FOR WATTS LOSS Watts Loss at Rated Current Ampere Rating Watts Loss (W) Ampere Rating Watts Loss (W) 35 40 50 60 70 80 90 100 125 150 175 200 225 6 7 8 10 12 14 15 17 21 25 29 33 37 250 300 350 400 450 500 600 700 800 900 1000 1200 41 49 57 65 69 77 92 110 130 140 160 175 Correction factor example: At 80% rated current, watts loss equals . 54 times watts loss at rated current. PERCENT RATED CURRENT 12/04 2.94 (74.7) 2.94 (74.7) 3.41 (86.6) 3.53 (89.7) 5.00 (127.0) 5.47 (138.9) F SCAC13 Semiconductor (A)(AC)fuses Semiconductor fuses American Round Fuses Form 101 Range A50QS Semiconductor Protection Fuses TIME IN SECONDS A50QS35 to 1200 Melting Time - Current Data, 500V Fuses CURRENT IN AMPERES MAXIMUM PEAK ARC VOLTS Maximum Arc Volts vs. System Voltage MAXIMUM INSTANTANEOUS PEAK LET-THRU AMPERES Peak Let-Thru Current Data - A50QS35 to 1200, 500 Volts AC CIRCUIT VOLTAGE (VOLTS RMS) AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES SCAC14 12/04 Semiconductor Semiconductor (AC) fuses (A) fuses American Round Fuses Form 101 Range A50QS Semiconductor Protection Fuses I2t Data - 500 Volts AC I2t data Melting Fuse Max Clearing I2t @ 500 VAC I2t Ampere 2 3 (A s X 10 ) 1 fuse (fig A) 2 Fuses in series Rating (A2s X 103) (A2s X 103)(fig B) .09 .11 .18 .25 .31 .43 .57 .74 .94 1.5 2.5 3.3 4.1 4.9 9.2 15 16 21 26 37 53 72 98 112 200 .56 .69 1.1 1.6 1.9 2.6 3.6 4.4 5.6 9 15 20 25 29 55 88 98 130 160 220 270 360 500 560 930 Fig. A Ampere Rating Clearing I2t (A2s X 103) 35 40 50 60 70 80 90 100 125 150 175 200 .48 .58 1.0 1.3 1.6 2.2 3.0 3.8 4.8 7.7 13 17 250 300 350 400 450 500 600 700 800 900 1000 1200 25 47 75 83 110 130 190 220 260 350 430 660 Load Fig. B OPERATING VOLTAGE (AC RMS VOLTS) DC Voltage Capability vs. Time Constant 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. 12/04 Fault 500 VAC DC VOLTAGE CAPABILITY Clearing I2t (A2s X 103) Load Clearing I2t vs. AC Operating Voltage Clearing I2t at 500V DC, 100kA, L/R = 10 ms Ampere Rating Fault 500 VAC .34 .4 .68 .94 1.1 1.5 2.1 2.7 3.4 5.4 9 12 15 18 33 53 59 76 94 130 160 220 300 330 550 CORRECTION FACTOR FOR I2T 35 40 50 60 70 80 90 100 125 150 175 200 225 250 300 350 400 450 500 600 700 800 900 1000 1200 L/R TIME CONSTANT (MS) SCAC15