Littelfuse 500 Volt Handbook
Summary
Reliable electrical protection starts with precision components. This technical guide provides detailed specifications for the FLQ Series Axial Lead and Cartridge Fuses, designed for critical circuit applications. The manual details a comprehensive range of fusing options, including precise electrical characteristics, opening times, and resistance profiles across various nominal ratings (1/10 through 30). Ideal for engineers, electricians, or procurement professionals who require certified, high-performance components with recognized agency approvals (UL, CSA).
Page 1 Text Content
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Axial Lead and Cartridge Fuses Midget
500 Volt Slo-Blo® Type Fuse FLQ Series
ELECTRICAL CHARACTERISTICS: ORDERING INFORMATION:
% of Ampere Ampere Opening Cartridge Nominal Rating Rating Time Catalog Ampere AC Voltage Resistance
135% 1/10-30 1 hour, Maximum Number Rating Rating Cold Ohms 32/10–30 12 seconds, Minimum FLQ 1/10 .100 188.0 FLQ 1/8 .125 125.9
200% 0–3 5 seconds, Minimum
FLQ 15/100 .150 87.0 AGENCY APPROVALS: Listed by Underwriters Laboratories and FLQ 3/16 .187 45.5 FLQ 2/10 .200 35.109
Certified by CSA.
FLQ 1/4 .250 9.7
INTERRUPTING RATING: 10,000 amperes at 500 VAC.
FLQ 3/10 .300 7.4 FLQ 4/10 .400 4.325
PATENTED
FLQ 1/2 .500 2.76 FLQ 6/10 .600 1.88 FLQ 8/10 .800 1.03 FLQ .7864 FLQ 11/8 1.125 .652 FLQ 11/4 1.25 .509 FLQ 11/2 1.5 .3835 FLQ 16/10 1.6 .296 FLQ .2086 FLQ 21/4 2.25 .1563 FLQ 21/2 2.5 .1381 FLQ .0954 FLQ 32/10 3.2 .0938 FLQ 31/2 3.5 .0732 FLQ .0618 FLQ 41/2 4.5 .0463 FLQ .0348 FLQ 56/10 5.6 .0327 FLQ .0284 FLQ 61/4 6.25 .0263 FLQ .0212 FLQ .01830 FLQ .01540 FLQ .01563 FLQ .01176
38.1 FLQ .00740
(1.50") FLQ .00690
FLQ .004063 FLQ .002920 FLQ .002816
IA ID
Page Summary Contents For Littelfuse 500 Volt Handbook
Manual Details
| Brand | Littelfuse |
|---|---|
| Pages | 1 |
| File Size | 31.80 KB |
| Published | May 26, 2026 |
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Frequently Asked Questions
What type of fuse is being described?
Axial Lead and Cartridge Fuses, specifically Midget U® L Slo-Blo Type Fuse FLQ Series.
What is the interrupting rating for this product line?
The interrupting rating is 10,000 amperes at 500 VAC.
Is this fuse approved by major safety agencies?
Yes, it is listed by Underwriters Laboratories and certified by CSA.
How does the required ampere rating change based on the desired time delay?
The catalog provides specific ratings for different combinations of Ampere and Time (e.g., 1/10-30 for 1 hour).
What size fuse should be used for a higher current application?
Selecting a larger nominal rating, such as FLQ 20 or FLQ 30, is necessary for higher amperage.