Special Purpose Fuses LA30QS Semiconductor Fuses 300 VAC • Very Fast Acting • 35 – 4500 Amperes Littelfuse LA30QS series Semiconductor protection fuses are intended for the protection of Power Semiconductors such as diodes, phase control SCR’s and other power semiconductor devices. The LA30QS is recommended for new applications providing solutions for your critical protection needs for 300V and less semiconductors. Features • Low I2t minimizes damage to protected components on short-circuit. • Controlled arc voltage reduces stress to circuit components during fuse clearing. • Choice of mounting types provides options for unique termination requirements. • Indicator options allow identification of blown fuses. • Superior DC capabilities. Applications Protection of 300 volt heavy duty rectifiers and similar heavy duty power supplies. Ordering Information LA 30 QS 600 -4 TI Special Purpose Fuses Littelfuse Voltage (300) Style Ampere Rating Mounting Type Ferrule Blades/Bolt-in Hockey Puck, bolt-in 1 4 128 Integral BlownFuse Indicator Trigger Indicator Trigger Actuator TI IL Note: Mounting types and integral blown fuse indicators are optional for specified ratings. Specifications Contact Littelfuse for characteristic curves. 90 Voltage Rating: Interrupting Rating: Ampere Range: Approvals: www.littelfuse.com AC: 300 volts DC: 300 volts 200,000 Amperes 35 – 4500 Amperes UL Recognized under the components program. © 2005 Littelfuse • POWR-GARD™ Products Catalog Special Purpose Fuses LA30QS Semiconductor Fuses 300 VAC • Very Fast Acting • 35 – 4500 Amperes Catalog Numbers & Technical Data Littelfuse Catalog Number Mounting Type 35 40 50 60 70 80 90 100 100 125 130 150 150 175 200 200 225 250 250 300 300 350 400 400 400 450 LA30QS35-4 LA30QS40-4 LA30QS50-4 LA30QS60-4 LA30QS70-4 LA30QS80-4 LA30QS90-4 LA30QS100-4 LA30QS100-4TI LA30QS125-4 LA30QS130-4 LA30QS150-4 LA30QS150-4TI LA30QS175-4 LA30QS200-4 LA30QS200-4TI LA30QS225-4 LA30QS250-4 LA30QS250-4TI LA30QS300-4 LA30QS300-4TI LA30QS350-4 LA30QS400-4 LA30QS400-4IL LA30QS400-4TI LA30QS450-4 4 4 4 4 4 4 4 4 4TI 4 4 4 4TI 4 4 4TI 4 4 4TI 4 4TI 4 4 4IL 4TI 4 Maximum Clearing I2 t @300 VAC (A 2S x 10 3) 0.9 1.2 2 2.7 1.6 2.6 3.2 4.1 4.1 6.3 6.3 9.3 9.3 10 15 15 22 25 25 37 37 62 83 83 83 130 Figure 1 Watts Loss @ Rated Current (W) 6.4 7 9.9 11.6 11 11 13 13 13 16 16 19 19 27 30 30 33 41 41 47 47 49 56 56 56 53 Ampere Rating Littelfuse Catalog Number Mounting Type 500 550 600 600 600 700 700 800 800 800 1000 1000 1200 1500 1500 1600 2000 2000 2500 2500 3000 3500 3500 4000 4500 LA30QS500-4 LA30QS550-4 LA30QS600-4 LA30QS600-4TI LA30QS600-4IL LA30QS700-4 LA30QS700-128 LA30QS800-4 LA30QS800-4IL LA30QS800-128 LA30QS1000-128 LA30QS1000-128IL LA30QS1200-128 LA30QS1500-128 LA30QS1500-128IL LA30QS1600-128 LA30QS2000-128 LA30QS2000-128IL LA30QS2500-128 LA30QS2500-128IL LA30QS3000-128 LA30QS3500-128 LA30QS3500-128IL LA30QS4000-128 LA30QS4500-128 4 4 4 4TI 4IL 4 128 4 4IL 128 128 128IL 128 128 128IL 128 128 128IL 128 128IL 128 128 128IL 128 128 Figure 2 Figure 4 Maximum Clearing I2 t @300 VAC (A 2S x 10 3) 160 190 230 230 230 260 260 330 330 330 460 460 880 1400 1400 1690 2600 2600 4000 4000 4700 6500 6500 8600 11000 Watts Loss @ Rated Current (W) 59 65 69 69 69 90 73 108 108 84 105 105 110 140 140 150 190 190 230 230 340 380 380 450 500 Special Purpose Fuses Ampere Rating Figure 3 Figure 5 Figure 6 TAP F 1.17 E [ 29.8 mm ] D C A 0.50 [ 12.8 mm ] Dimensions B Dimensions for reference only. Amperes Mount. Type Fig. No. 35 – 60 70 – 200 225 – 700 700 – 1200 1500 – 2500 3000 – 4500 4 4 4, 4IL* 128 128, 128IL* 128, 128IL* 1 2 2, 3* 4 5, 6* 5, 6* A B 3.19 (81.0) 0.81 (20.6) 3.13 (79.5) 1.22 (31.0) 3.84 (97.5) 1.50 (38.1) 2.59 (65.8) 3.00 (76.2) 2.59 (65.8) 3.50 (88.9) 2.59 (65.8) 4.50 (114) Dimensions in Inches (mm in parentheses) C D E F 1.63 (41.4) 2.50 (63.5) 2.25 (57.5) 0.34 (8.6) 1.63 (41.4) 2.44 (62.0) 2.31 (58.7) 0.31 (7.9) 1.59 (40.1) 2.91 (73.9) 2.28 (57.9) 0.41 (10.4) 2.34 (59.4) 2.50 (63.5) 1.50 (38.1) – 2.34 (59.4) 3.00 (76.2) 1.50 (38.1) 1.50 (38.1) 2.34 (59.4) 3.75 (95.3) 1.50 (38.1) 1.50 (38.1) G 0.72 (18.3) 1.00 (25.4) 1.00 (25.4) – – – H 0.13 (3.3) 0.19 (4.8) 0.25 (6.4) – – – Tap – – – 3 8 ⁄ -24-1⁄2 deep 3 8 ⁄ -24-1⁄2 deep 12 ⁄ -20-1⁄2 deep * Optional Actuator (IL) © 2005 Littelfuse • POWR-GARD™ Products Catalog www.littelfuse.com 91