Littelfuse Fuses
Littelfuse industrial fuses, power fuses, automotive fuses, axial fuses, cartridge fuses, surface mount fuses, specialty fuses, and medium voltage fuses provide overcurrent protection and regulate current flow in practically every device, machine, and electrical system. When it comes to automotive, industrial, or consumer electronics, Littelfuse fuses might be found providing overcurrent protection in simple or complex circuits. With precise ratings and advanced engineering, they are applied where safety and reliability are paramount.
The Littelfuse fuses part numbering system makes it easy to select the right fuse for just about any application. It is detailed and straightforward enough that we consider it a best practice for our industry to follow when defining and describing our products to ensure user understanding. The parameters it encompasses—like rating, type, and even design—are essential for the accurate identification of not only automotive fuses but also fuse links and medium-voltage fuses. The automotive fuses and links we offer comply with National Automotive Specifications and International standards (ISO), and the medium-voltage fuses are defined by IEC standards. When it comes to overcurrent protection for high-power systems, the specialty fuses and surface-mount options are adequate safeguards against the components they protect—like motors and transformers.
Found 8219 items
Filters
Found 8219 items
Manufacturer
Littelfuse (8219)
Component
Accessories (353)
Disconnect Switch (34)
Distribution Block (89)
Fuse (6317)
Fuse Alarm (1)
Fuse Block (338)
Fuse Holder (907)
Protected Surge Protective Device (89)
Surge Protection Device (73)
Surge Protection Module (18)
Fuse Type (UL)
2AG (5X15mm) (86)
3AB/3AG (6.3X32mm) (281)
5X20mm (399)
ATO (10)
Blade (40)
Bolt Down (8)
Cable Limiter (38)
Cartridge (5)
Class CC (383)
Class CD (6)
Fuse Protection Type
All General Purpose Circuits (211)
Automotive (660)
Axial Radial Thru Hole Fuse (22)
Ballast Protection (24)
Battery Controller Protection (13)
Branch Circuit Protection (67)
Cartridge Fuse (766)
Circuits With High AC Fault Current (25)
Class Midget (38)
Control Circuit Protection (32)
Sub Component
Auxiliary Contact (1)
Auxiliary Contact Holder (5)
Cover (13)
Cover Puller (1)
Current Sensor (1)
Current Transformer (7)
DIN Rail Mount Adapter (1)
Direct Panel Handle (4)
Disconnect Switch (7)
Distribution Block Cover (5)
Fuse Amperage Rating
.175 Amp (1)
.35 Amp (3)
0.002 Amp (5)
0.005 Amp (5)
0.01 Amp (17)
0.015 Amp (5)
0.017 Amp (5)
0.031 Amp (8)
0.032 Amp (17)
0.04 Amp (10)
Fuse Voltage Rating
100 Volts (DC) (13)
1000 Volts (28)
1000 Volts (DC) (94)
1100 Volts (1)
120 Volts (22)
125 Volts (721)
125 Volts (DC) (301)
126 Volts (DC) (1)
130 Volts (DC) (15)
145 Volts (DC) (1)
Fuse Response Time
Fast Acting (240)
Fast-Acting (1627)
Medium-Acting (1)
Medium-Acting/Medium Time Lag/Medium Time Delay (96)
One Time Use (72)
Slo-Blo/Time Lag (T)/Time Delay (1557)
Time Delayed (663)
Very Fast Acting (37)
Very Fast-Acting (489)
Fuse Size
0.406" X 1.375" (2)
0.406" X 1.5" (2)
0.41" X 1.25" (76)
0.41" X 1.375" (36)
0.41" X 1.5" (86)
0.85" X 1.88" (5)
1" X 1-9/16" (2)
1" X 4-1/8" (4)
1.25" X 3.984" (3)
1-1/16" X 2-7/16" (2)
Mounting
Adapter (14)
Back Panel Mount (1)
Blade (1)
Bolt-In (172)
Box Cover (5)
DIN Rail (84)
Disconnect (8)
Industrial Cartridge (132)
In-Line (193)
Knife-Blade (92)
(CL)
MUST BUY IN PACKS OF 10 (1348)
MUST BUY IN PACKS OF 100 (1347)
MUST BUY IN PACKS OF 1000 (968)
MUST BUY IN PACKS OF 12 (7)
MUST BUY IN PACKS OF 1200 (9)
MUST BUY IN PACKS OF 15 (11)
MUST BUY IN PACKS OF 150 (14)
MUST BUY IN PACKS OF 18 (17)
MUST BUY IN PACKS OF 2 (9)
MUST BUY IN PACKS OF 20 (29)
Interrupt Rating
10 Ka (4)
10 Ka @ 125 Volts (77)
10 Ka @ 125 Volts (DC) (31)
10 Ka @ 250 Volts (1)
10 Ka @ 300 Volts (34)
10 Ka @ 32 Volts (DC) (13)
100 Ka @ 150 Volts (2)
100 Ka @ 170 Volts (DC) (154)
100 Ka @ 600 Volts (5)
120 Ka @ 400 Volts (8)
Number of Poles
1 Pole (199)
15 Pole (4)
2 Pole (140)
27 Pole (1)
3 Pole (121)
39 Pole (1)
4 Pole (18)
57 Pole (4)
6 Pole (4)
9 Pole (4)
Normally In Stock
Littelfuse 031303.2MXP 3AB/3AG (6.3x32mm) Fuse - 3.2 Amp, 250 VAC
Free U.S Ground shipping
$8.34
$6.95
Normally In Stock
Littelfuse MIN003 Automotive Fuse - 3 Amp, 32 VAC
Free U.S Ground shipping
$2.46
$2.05
Normally In Stock
Littelfuse 22903.5P Glass Fuse - 3.5 Amp, 250 VAC
Free U.S Ground shipping
$14.20
$11.83
Normally In Stock
Littelfuse LFR604003C Class R Fuse Block - 400 Amp, 600 VAC
Free U.S Ground shipping
$1908.23
$1590.19
Normally In Stock
Littelfuse FLQ.125 Fuse Class Midget 0.125 Amps
Free U.S Ground shipping
$41.00
$34.17
Normally In Stock
Littelfuse FLA1.25 Fuse Special Class Midget 1.25 Amps
Free U.S Ground shipping
$37.13
$30.94
Normally In Stock
Littelfuse FLA6.25 Fuse Special Class Midget 6.25 Amps
Free U.S Ground shipping
$37.13
$30.94
More Information about Littelfuse Fuses
Littelfuse fuses also incorporate key features like pre-arcing time limits to protect devices before any damage can occur, ensuring precision and efficiency when it comes to overcurrent protection. Their solutions are so diverse and so applicable that they seem relevant to just about any situation one might find in electrical circuits. Littelfuse fuses are designed to protect virtually any device or assembly unit, offering specialized solutions such as automotive fuse link selection to ensure optimal performance and compatibility in various applications.
Breakers vs Fuses
Fuses
Fuses are safety devices that are intended to provide protection to both equipment and people in the event of a power surge or an overcurrent situation. A fuse can provide this protection by using a small piece of wire that is sacrificial, and is intended to burn up when too much current is passed through it. When this happens, the fuse eliminates the flow of electricity in that circuit until it is replaced. The size and type of wire that is used in the fuse will dictate how much current can pass through that individual fuse. So the main thing to remember is, when a fuse blows, it must be replaced and cannot be reused.
Circuit Breakers
Circuit breakers are intended to be reused after they are “tripped” during a power surge or an overcurrent situation. Much like fuses, circuit breakers are designed to trip at a certain current level. This is intended to protect both equipment and anyone in the area of that particular circuit. Circuit breakers can be found in just about any variation from single phase, low current applications to three phase, and high current applications.
As a general rule: fuses are more simplistic and reliable. They cost less initially and are better suited for individual circuit protection. However, they can create more cost over time with each use and may create hazards due to the exposed connection points. Whereas circuit breakers offer better branch circuit protection and do not need to be replaced after each use. They are more expensive initially and, because of their complexity, are more prone to failure over time.