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KLKD.100T
Fuse, Industrial / Power, POWR-GARD KLKD, 100 mA, 600 VAC, 600 VDC, 10mm x 38mm, 13/32" x 1-1/2"
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: LITTELFUSE
- Product type: Industrial & Electrical Power Fuses
- Product Range:POWR-GARD KLKD Series; Fuse Current:100mA; Voltage Rating VAC:600VAC; Voltage Rating V DC:600VDC; Fuse Size Metric:10mm x 38mm; Fuse Size Imperial:13/32" x 1-1/2"; Blow Char
- SVHC: No SVHC (17-Dec-2014)
- Fuse Current: 100mA
- Product Range: POWR-GARD KLKD
- Fuse Size Metric: 10mm x 38mm
- Fuse Size Imperial: 13/32" x 1-1/2"
- Voltage Rating VAC: 600VAC
- Voltage Rating VDC: 600VDC
- Blow Characteristic: Fast Acting
| Delivery and price | |
|---|---|
| Units per pack | 20 |
| Price | 13.51 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**POWR-GARD[®] Fuse Datasheet** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## 600 Vac/dc •[1] /10-30 A • Fast Acting ## **Specifications** ## **Description** The KLKD fuse series is fast-acting with a high DC voltage rating. This family of Midget style fuses (10 x 38 mm) is used in solar combiner boxes and in circuits with DC fault currents up to 50,000 amperes. KLKD fuses are available in standard and board-mount configurations. In addition, the KLKD series has been designed to meet both the UL and IEC photovoltaic fuse standards. Littelfuse offers a wide range of ampere ratings to match specific requirements in a variety of applications. ## **Features/Benefits** - Designed to UL and IEC photovoltaic specifications - 1/10 - 30 A ratings available - 50,000 A Interrupting Rating - Available in ferrule or PCB mount options **Voltage Rating:** 600 Vac/Vdc **Amperage Rating:**[1] /10,[1] /8,[2] /10,[1] /4,[3] /10,[1] /2,[3] /4, 1, 1[1] /2, 2, 2[1] /2, 3, 3[1] /2, 4, 5, 6, 7, 8, 9,10, 12, 15, 20, 25, 30 **Interrupting Ratings:** AC: 100 kA 200 kA Littelfuse self-certified DC:[1] /10-30: 10 kA (UL 248-19) 1/10-30: 50 kA (UL 248-14) **Material:** Body: Melamine / Caps: Copper Alloy **Operating Temperature:** See Rerating Curve **Approvals:** UL 248-19 Listed (File: E339112) IEC 60269-6 (2-25 A) VDE Certified (No. 40033094) UL 248-14 Listed (File: E10480) CSA Certified Ferrule only (File: LR29862) **Environmental:** RoHS Compliant **Country of Origin:** Mexico ## **Part Numbering System** **KLKD xxx H XRE Mounting Options Series** Blank = Ferrule XR[*] = PCB 1-tab **Amp Code** E= Extended PCB tabs Refer to Amp Code Column in Electrical ~~a~~ **Package Quantity** Specifications Table T = 10 H = 100 - 1-5 A meets UL1741 GFDI requirements ## **Applications** - Combiner boxes and Inverters - Power supplies - Desktop meters ## **Dimensions Inches (mm)** **PCB 1-Tab** **Ferrule Version** **==> picture [275 x 82] intentionally omitted <==** **----- Start of picture text -----**<br> .06 (1.52) .02 (.51) .14<br>(3.56)<br>_ 4 oh<br>.04<br>6G oT (1.02)<br>(= / \—=<br>1.5 1.5<br>(38.1) (38.1) 1.53<br>(38.86)<br>**----- End of picture text -----**<br> |SERIES|AMP|PACKAGE<br>QUANTITY|MOUNTING<br>METHOD|CATALOG<br>NUMBER|ORDERING<br>NUMBER| |---|---|---|---|---|---| |KLKD|1/8|10|FERRULE|KLKD1/8|KLKD.125T| |KLKD<br>KLKD|5<br>15|100<br>100|FERRULE<br>PCB 1-TAB|KLKD 5<br>KLKD 15-R|KLKD005.H<br>KLKD015.HXR| *Only available in 100 packs (H) and select ratings. ## **Recommended Fuse Holders** Littelfuse LFPSM and LPSM Dead-Front Series Littelfuse L60030M Open-Face Series ## **Web Resources** Download CAD drawings and other technical information: **littelfuse.com/klkd** .406 (10.31) **==> picture [143 x 42] intentionally omitted <==** **----- Start of picture text -----**<br> MOUNTING HOLE<br>.50 (12.7) .12 (3.05) DETAIL<br>.12 .28 (10.31).406<br>**----- End of picture text -----**<br> **1 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [91 x 32] intentionally omitted <==** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## **Ordering Information** ## Ferrule Version **==> picture [506 x 340] intentionally omitted <==** **----- Start of picture text -----**<br> INTERRUPTING AGENCY<br>AMP AMP CATALOG ORDERING VOLTAGE RATING (kA) UPC WEIGHT APPROVALS<br>RATING CODE NUMBER NUMBER LB (G)<br>DC & AC AC DC UL VDE CSA<br>1/10 .100 KLKD [1] /10 KLKD.100T 600 100 50 07945810189 .013 (5.90) • •<br>1/8 .125 KLKD [1] /8 KLKD.125T 600 100 50 07945810190 .013 (5.90) • •<br>2/10 .20 KLKD [2] /10 KLKD.200T 600 100 50 07945810191 .013 (5.90) • •<br>1/4 .250 KLKD [1] /4 KLKD.250T 600 100 50 07945810192 .013 (5.90) • •<br>3/10 .300 KLKD [3] /10 KLKD.300T 600 100 50 07945810193 .013 (5.90) • •<br>1/2 .500 KLKD ½ KLKD.500T 600 100 50 07945810194 .013 (5.90) • •<br>3/4 .750 KLKD [3] /4 KLKD.750T 600 100 50 07945810195 .013 (5.90) • •<br>1 001 KLKD 1 KLKD001.T 600 100 50 07945810196 .013 (5.90) • •<br>1 [1] /2 01.5 KLKD 1 [1] /2 KLKD01.5T 600 100 50 07945810197 .013 (5.90) • •<br>2 002 KLKD 2 KLKD002.T 600 100 50 07945810198 .017 (7.71) • • •<br>2 [1] /2 02.5 KLKD 2 [1] /2 KLKD02.5T 600 100 50 07945810199 .017 (7.71) • • •<br>3 003 KLKD 3 KLKD003.T 600 100 50 07945810200 .017 (7.71) • • •<br>3 [1] /2 03.5 KLKD 3 [1] /2 KLKD03.5T 600 100 50 07945810214 .017 (7.71) • • •<br>4 004 KLKD 4 KLKD004.T 600 100 50 07945810201 .017 (7.71) • • •<br>5 005 KLKD 5 KLKD005.T 600 100 50 07945810202 .017 (7.71) • • •<br>6 006 KLKD 6 KLKD006.T 600 100 50 07945810203 .017 (7.71) • • •<br>7 007 KLKD 7 KLKD007.T 600 100 50 07945810204 .017 (7.71) • • •<br>8 008 KLKD 8 KLKD008.T 600 100 50 07945810205 .017 (7.71) • • •<br>9 009 KLKD 9 KLKD009.T 600 100 50 07945810215 .017 (7.71) • • •<br>10 010 KLKD 10 KLKD010.T 600 100 50 07945810206 .017 (7.71) • • •<br>12 012 KLKD 12 KLKD012.T 600 100 50 07945810207 .017 (7.71) • • •<br>15 015 KLKD 15 KLKD015.T 600 100 50 07945810208 .017 (7.71) • • •<br>20 020 KLKD 20 KLKD020.T 600 100 50 07945810209 .017 (7.71) • • •<br>25 025 KLKD 25 KLKD025.T 600 100 50 07945810210 .017 (7.71) • • •<br>30 030 KLKD 30 KLKD030.T 600 100 50 07945810211 .017 (7.71) • •<br>**----- End of picture text -----**<br> ## PCB 1-Tab Version **==> picture [505 x 217] intentionally omitted <==** **----- Start of picture text -----**<br> VOLTAGE INTERRUPTING<br>AMP AMP CATALOG ORDERING APPROVALS<br>RATING RATING (kA) UPC<br>RATING CODE NUMBER NUMBER<br>DC & AC AC DC UL CE<br>1/10 .100 KLKD [1] /10-R KLKD.100HXR 600 100 50 07945814857 • •<br>1/2 .500 KLKD ½ -R KLKD.500HXR 600 100 50 07945814858 • •<br>1 001 KLKD 1-R KLKD001.HXR 600 100 50 07945812133 • •<br>2 002 KLKD 2-R KLKD002.HXR 600 100 50 07945894349 • •<br>3 003 KLKD 3-R KLKD003.HXR 600 100 50 07945818991 • •<br>4 004 KLKD 4-R KLKD004.HXR 600 100 50 07945811495 • •<br>5 005 KLKD 5-R KLKD005.HXR 600 100 50 07945814859 • •<br>6 006 KLKD 6-R KLKD006.HXR 600 100 50 07945894350 • •<br>8 008 KLKD 8-R KLKD008.HXR 600 100 50 07945894351 • •<br>10 010 KLKD 10-R KLKD010.HXR 600 100 50 07945814860 • •<br>12 012 KLKD 12-R KLKD012.HXR 600 100 50 07945894352 • •<br>15 015 KLKD 15-R KLKD015.HXR 600 100 50 07945894353 • •<br>20 020 KLKD 20-R KLKD020.HXR 600 100 50 07945894354 • •<br>25 025 KLKD 25-R KLKD025.HXR 600 100 50 07945894355 • •<br>30 030 KLKD 30-R KLKD030.HXR 600 100 50 07945894356 • •<br>**----- End of picture text -----**<br> **2 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## **Electrical Specifications** **==> picture [505 x 493] intentionally omitted <==** **----- Start of picture text -----**<br> NOM COLD WATTS LOSS WATTS LOSS AVERAGE TOTAL TOTAL<br>AMP CATALOG AVERAGE AVERAGE<br>RESISTANCE AT 100% RATED AT 80% RATED CLEARING CLEARING I [2] t CLEARING I [2] t<br>RATING NUMBER MELT TIME MELTING I [2] t<br>(ohms) CURRENT (W) CURRENT (W) TIME (A [2 ] s) 20 kA (A [2 ] s) 100 kA<br>1/10 KLKD [1] /10 85.5 – – 0.780 0.505 0.000047 0.019 –<br>1/8 KLKD [1] /8 65 – – 0.975 0.659 0.000050 0.010 –<br>2/10 KLKD [2] /10 30.9 – – 1.213 0.773 0.000073 0.032 –<br>1/4 KLKD [1] /4 22 – – 1.364 0.870 – – –<br>3/10 KLKD [3] /10 16.2 – – 1.519 0.960 0.000101 0.067 –<br>1/2 KLKD ½ 8.16 – – 1.961 1.237 0.000141 0.197 –<br>3/4 KLKD [3] /4 0.402 0.000063 0.234 0.361 0.199 0.000170 0.753 –<br>1 KLKD 1 0.252 0.000094 0.678 0.388 0.273 0.000247 1.827 0.008<br>1 [1] /2 KLKD 1 [1] /2 0.134 0.000153 2.890 0.409 0.229 0.000828 13.956 280<br>2 KLKD 2 0.129 0.000145 2.379 0.823 0.606 0.000291 3.919 0.012<br>2 [1] /2 KLKD 2 [1] /2 0.0989 0.000186 5.142 0.912 0.618 0.000387 8.877 –<br>3 KLKD 3 0.0773 0.000211 7.821 0.957 0.654 0.000449 14.835 –<br>3 [1] /2 KLKD 3 [1] /2 0.0613 0.000249 12.417 1.12 0.826 0.000471 21.048 –<br>4 KLKD 4 0.0511 0.000284 18.945 1.367 0.891 0.000507 30.76 0.019<br>5 KLKD 5 0.0363 0.000347 34.163 1.4 0.938 0.000607 56.514 0.024<br>6 KLKD 6 0.0261 0.000423 62.951 1.516 0.998 0.000735 96.824 0.035<br>7 KLKD 7 0.0205 0.000505 105.143 1.577 1.066 0.000898 168.578 0.087<br>8 KLKD 8 0.0194 0.000541 130.266 1.824 1.205 0.000945 210.595 0.656<br>9 KLKD 9 0.0166 0.000587 164.221 2.208 1.428 0.000992 266.633 –<br>10 KLKD 10 0.0128 0.000701 278.390 1.893 1.3 0.001200 454.628 211.667<br>12 KLKD 12 0.0103 0.000822 445.010 2.296 1.584 0.001455 744.775 440<br>15 KLKD 15 .007855 0.000544 137.333 2.045 1.57 0.001721 351.24 –<br>20 KLKD 20 0.0045 0.000826 462.056 2.133 1.593 0.006144 1151.185 2120<br>25 KLKD 25 0.003532 0.001007 834.529 2.55 1.933 0.002085 1744.033 2085<br>30 KLKD 30 0.002776 0.001207 1409 3.701 1.983 0.002266 2757 3220<br>**----- End of picture text -----**<br> Note: Test Circuit 600 Vac / 20 kA **3 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## **Current-Limiting Effects** **==> picture [244 x 180] intentionally omitted <==** **----- Start of picture text -----**<br> APPARENT RMS SYMMETRICAL CURRENT<br>SHORT CIRCUIT FOR VARIOUS FUSE RATINGS<br>CURRENT*<br>1 1/2 A 12 A 25 A 30 A<br>5,000 240 292 654 722<br>10,000 303 367 823 910<br>15,000 347 420 943 1042<br>20,000 381 463 1037 1147<br>25,000 411 498 1117 1235<br>30,000 437 530 1188 1313<br>35,000 460 558 1250 1382<br>40,000 481 583 1307 1445<br>50,000 518 628 1408 1556<br>60,000 550 667 1496 1654<br>80,000 605 735 1647 1820<br>100,000 652 791 1774 1961<br>**----- End of picture text -----**<br> *Prospective RMS Symmetrical Amperes Short-Circuit Current ## **Electrical Specification – Agency Requirements** **==> picture [505 x 379] intentionally omitted <==** **----- Start of picture text -----**<br> OPENING TIME (MINUTES)<br>AMPERAGE<br>RATING 100% of Amp 113% of Amp 135% of Amp 145% of Amp 200% of Amp<br>Rating per UL Rating per IEC Rating per UL Rating per IEC Rating per UL<br>1/10 -30 Temperature Stabilization 60 Min 60 Max 60 Max 4 Max<br>Temperature Derating Curve (Temperature of Air Immediately Surrounding Fuse)<br>60<br>40<br>20<br>0 0<br>20<br>40<br>60<br>-60°C -40°C -20°C 0°C 20°C 40°C 60°C 80°C 100°C 120°C 140°C<br>-76°F -40°F -4°F 32°F 68°F 104°F 140°F 176°F 212°F 248°F 284°F<br>AMBIENT TEMPERATURE<br>PERCENT OF UPRATING<br>PERCENT OF DOWNRATING<br>**----- End of picture text -----**<br> **4 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com **POWR-GARD[®] Fuse Datasheet** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## **Recommended Process and Soldering Parameters** **==> picture [191 x 134] intentionally omitted <==** **----- Start of picture text -----**<br> WAVE PARAMETER LEAD FREE RECOMMENDATION<br>Preheat: (Typical Industry Recommendation)<br>Temperature Minimum: 130˚ C<br>—<br>Temperature Maximum:<br>Pre-heat time 75 Seconds Maximum<br>Solder Pot Temperature 280˚ C Maximum<br>Solder Dwell Time 270˚ C for 8 Seconds Maximum<br>Complete Cycle Time 250 Seconds Maximum<br>**----- End of picture text -----**<br> ## **Peak Let Thru Curve** **==> picture [403 x 366] intentionally omitted <==** **----- Start of picture text -----**<br> 1000000<br>100000<br>30A<br>25A<br>12A<br>1-1/2A<br>10000<br>1000<br>100 x<br>100 1000 10000 100000 1000000<br>AVAILABLE FAULT CURRENT<br>SYMMETRICAL R.M.S. AMPERES<br>5 of 7 © 2018 Littelfuse POWR-GARD [®] Products<br>Rev: 111618<br>PEAK LET- THRU IN AMPERES<br>**----- End of picture text -----**<br> littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ ## **Time Current Curve ([1] /8 - 2[1] /2 A)** **==> picture [254 x 304] intentionally omitted <==** **----- Start of picture text -----**<br> 1000900800 1000900800<br>700 700<br>600 600<br>500 400 - 1/8 A 500 400<br>300 - 2/10 A 300<br>- 1/4 A<br>200 - 3/10 A 200<br>- 1/2 A<br>1009080 70 - - 3/4 A 1 A 1009080 70<br>6050 - 1-1/2 A 6050<br>40 - 2 A 40<br>30 - 2-1/2 A 30<br>20 20<br>10987 98710<br>6 6<br>5 5<br>4 4<br>3 3<br>2 2<br>0.80.9 1 0.810.9<br>0.7 0.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>0.090.080.1 0.090.080.1<br>0.07 0.07<br>0.06 0.06<br>0.05 0.05<br>0.04 0.04<br>0.03 0.03<br>0.02 0.02<br>0.01 0.01<br>CURRENT IN AMPERES<br>0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.090.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.91 2 3 4 5 6 7 8 109 20 30 40 50 60 70 80 90100<br> TIME IN SECONDS<br>0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.090.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 10.9 2 3 4 5 6 7 8 910 20 30 40 50 60 70 80 90100<br>**----- End of picture text -----**<br> ## **Time Current Curve (15 - 25 A)** **==> picture [254 x 304] intentionally omitted <==** **----- Start of picture text -----**<br> 1000900800700 1000900800700<br>600 600<br>500 500<br>400 400<br>300 300<br>200 200<br>10090 80 70 10090 80 70<br>60 60<br>50 50<br>40 40<br>30 30<br>20 - 15 A 20<br>- 20 A<br>- 25 A<br>10987 10987<br>6 6<br>5 5<br>4 4<br>3 3<br>2 2<br>0.90.80.7 1 10.90.80.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>0.090.080.070.1 0.10.090.080.07<br>0.06 0.06<br>0.05 0.05<br>0.04 0.04<br>0 . 03 0 . 03<br>0.02 0.02<br>0.01 0.01<br>CURRENT IN AMPERES<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000<br>TIME IN SECONDS<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90100 200 300 400 500 600 700 800 900 1000<br>**----- End of picture text -----**<br> ## **Time Current Curve (3 - 12 A)** **==> picture [254 x 304] intentionally omitted <==** **----- Start of picture text -----**<br> 1000900800700 1000900800700<br>600 600<br>500 500<br>400 400<br>300 300<br>200 200<br>100 80 706090 --- 3 33 A4 A -1/2A 1/2 A 10090 80 7060<br>5040 - 5 A 5040<br>30 - 6 A 30<br>- 7 A<br>20 - 8 A 20<br>- 9 A<br>10987 - - 12 A 10 A 10987<br>6 6<br>5 5<br>4 4<br>3 3<br>2 2<br>0.90.80.71 10.90.80.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>0.090.080.070.1 0.10.090.080.07<br>0.06 0.06<br>0.05 0.05<br>0.04 0.04<br>0 0 . 03 0 . 03<br>0.02 0.02<br>0.01 0.01<br>CURRENT IN AMPERES<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 9001000<br>TIME IN SECONDS<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 910 20 30 40 50 60 70 80 90100 200 300 400 500 600 700 800 900 1000<br>**----- End of picture text -----**<br> ## **Time Current Curve (30 A)** **==> picture [254 x 304] intentionally omitted <==** **----- Start of picture text -----**<br> 1000900800 1000900800<br>700 700<br>600 600<br>500 500<br>400 400<br>300 300<br>200 200<br>100 80 7090 10090 80 70<br>60 60<br>50 50<br>40 40<br>30 30<br>20 20<br>10987 - 30 A 10987<br>6 6<br>5 5<br>4 4<br>3 3<br>2 2<br>0.90.81 10.90.8<br>0.7 0.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>0.090.080.1 0.10.090.08<br>0.07 0.07<br>0.06 0.06<br>0.05 0.05<br>0.04 0.04<br>0 . 03 0 . 03<br>0.02 0.02<br>0.01 0.01<br>CURRENT IN AMPERES<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000<br>TIME IN SECONDS<br>0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000<br>**----- End of picture text -----**<br> **6 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## KLKD ~~SE~~ RIES ~~10x~~ 38 FU ~~SES~~ **Disclaimer Notice -** Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. **Littelfuse.com/Product-Disclaimer** **7 of 7** © 2018 Littelfuse POWR-GARD[®] Products Rev: 111618 littelfuse.com
Updated at April 17, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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