Document
Special Purpose Fuses
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
Contact Littelfuse for characteristic curves. 90
LA 30 QS 600 -4 TI
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
Voltage Rating:
Interrupting Rating: Ampere Range: Approvals:
AC: 300 volts DC: 300 volts 200,000 Amperes 35 – 4500 Amperes UL Recognized under the components program.
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© 2005 Littelfuse • POWR-GARD™ Products Catalog
Special Purpose Fuses
LA30QS Semiconductor Fuses
300 VAC • Very Fast Acting • 35 – 4500 Amperes
Catalog Numbers & Technical Data
Ampere Rating
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
Littelfuse Catalog Number 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
Mounting Type 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 I2t @300 VAC (A2S x 103)
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
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
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
Littelfuse Catalog Number 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
Mounting Type 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
Maximum Clearing I2t @300 VAC (A2S x 103)
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
Figure 1
Figure 2
Figure 3
Special Purpose Fuses
Figure 4
Figure 5
Figure 6
TAP F
1.17 [ 29.8 mm ]
C
A
0.50 [ 12.8 mm ]
E D B
Dimensions
Amperes Mount. Type
35 – 60 70 – 200
4 4
225 – 700 700 – 1200 1500 – 2500 3000 – 4500
4, 4IL* 128
128, 128IL* 128, 128IL*
* Optional Actuator (IL)
Fig. No.
1 2 2, 3* 4 5, 6* 5, 6*
A 3.19 (81.0) 3.13 (79.5) 3.84 (97.5) 2.59 (65.8) 2.59 (65.8) 2.59 (65.8)
B 0.81 (20.6) 1.22 (31.0) 1.50 (38.1) 3.00 (76.2) 3.50 (88.9) 4.50 (114)
Dimensions in Inches (mm in parentheses)
CDE 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)
Dimensions for reference only.
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 1⁄2-20-1⁄2 deep
© 2005 Littelfuse • POWR-GARD™ Products Catalog
www.littelfuse.com
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