AMP-TRAP®–Form 101 A50QS SEMICONDUCTOR PROTECTION FUSES 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. Ratings ➤ AC: 35-60A 500VAC, 200kA I.R. 70-1200A 500VAC, 200kA I.R. ➤ DC: 35-1200A 500VDC, 100kA I.R. Approvals ➤ UL Recognized Component ➤ AC: UL Guide No. JFHR2 ➤ DC Tested to UL Standard 198L parameters (70-1200A) ➤ CSA Certified LR12636 Features / Benefits ➤ Lowest l2t for greatest protection of semiconductor circuits ➤ Low watts loss for cooler operation HIGHLIGHTS: APPLICATIONS: 500V AC/DC Rated 2 ➤ Lowest l t ➤ Low Watts Loss ➤ Superior Cycling Ability ➤ ➤ Protection of 500V or less motor drives, UPS, inverters, etc. ➤ 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 Catalog Numbering System Amp-trap® Fuse Single Pole Fuse Blocks for A50QS Fuses FUSE AMPERE RATING MOUNTING TYPE FUSE BLOCK CATALOG NUMBER 1 - 30 35-200 225-600 4 4 P243E P266C A Rated Volts - 500 50 Style QS Amperes* Mounting Type* Blades, bolt-in A 50 QS 250 - 4 250 4 * For ampere ratings and types not listed, consult the factory. D 12 AMP-TRAP®–Form 101 A50QS SEMICONDUCTOR PROTECTION FUSES Standard Fuse Ampere Ratings, Catalog Numbers AMPERE RATING CATALOG NUMBER AMPERE RATING CATALOG 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 A50QS225-4 250 300 350 400 450 500 600 700 800 900 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 D 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 DIMENSIONS - INCHES (mm) D E A B C F G H 3.63 (92.2) 3.63 (92.2) 1.00 (25.4) 1.22 (31.0) 2.13 (54.1) 2.13 (54.1) 2.94 (74.7) 2.94 (74.7) 2.75 (69.9) 2.81 (71.4) 0.31 (7.9) 0.31 (7.9) 0.75 (19.1) 1.00 (25.4) 0.13 (3.3) 0.19 (4.8) 4.34 (110) 4.47 (114) 1.50 (38.1) 2.00 (50.8) 2.09 (53.1) 2.22 (56.4) 3.41 (86.6) 3.53 (89.7) 2.78 (70.6) 2.91 (73.9) 0.41 (10.4) 0.41 (10.4) 1.00 (25.4) 1.50 (38.1) 0.25 (6.4) 0.25 (6.4) 6.47 (164.3) 6.97 (177.0) 2.50 (63.5) 3.00 (76.2) 2.22 (56.4) 3.22 (81.8) 5.00 (127.0) 5.47 (138.9) 3.44 (87.3) 4.47 (113.5) .53 (13.5) .63 (15.9) 1.50 (38.1) 2.38 (60.3) .25 (6.4) .44 (11.1) Watts Loss at Rated Current Watts Loss vs. Percent Rated Current Correction Factor for Watts Loss AMPERE RATING 35 40 50 60 70 80 90 100 125 150 175 200 225 WATTS LOSS(w) 6 7 8 10 12 14 15 17 21 25 29 33 37 AMPERE RATING 250 300 350 400 450 500 600 700 800 900 1000 1200 WATTS LOSS(w) 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 D 13 AMP-TRAP®–Form 101 A50QS SEMICONDUCTOR PROTECTION FUSES A50QS35 to 1200 Time in Seconds 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 D 14 AMP-TRAP®–Form 101 A50QS SEMICONDUCTOR PROTECTION FUSES I2t Data – 500 Volts AC I2t DATA (A2s x 103) (A2s x 103) (A2s x 103)(Fig B) 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 .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 .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 Fig. A Load Fault 500 VAC Clearing I2t vs. AC Operating Voltage D Operating Voltage (AC RMS Volts) Clearing I2t at 500V DC, 100kA, L/R = 10 ms CLEARING I2t (A2s x 103) .48 .58 1.0 1.3 1.6 2.2 3.0 3.8 4.8 7.7 13 17 21 AMPERE RATING 250 300 350 400 450 500 600 700 800 900 1000 1200 CLEARING I2t (A2s x 103) 25 47 75 83 110 130 190 220 260 350 430 660 DC Voltage Capability vs. Time Constant DC Voltage Capability AMPERE RATING 35 40 50 60 70 80 90 100 125 150 175 200 225 Load Fig. B 2 RATING Fault 500 VAC Correction Factor for I t FUSE MAX. CLEARING I2t @ 500VAC AMPERE MELTING I2t 1 FUSE (Fig A) 2 FUSES IN SERIES 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) D 15