FUSE SELECTION GUIDE A quick reference guide to selecting fuses for electronic applications Max. Voltage < 250 VAC/VDC Mounting Surface Mount Fuses Through-Hole PICO SMF Fuse ® NANO 2® Fuse Fuse Type Thin Film Fuse Ceramic Chip Fuse –55°C to 90°C 1206 2410 Fuse/FH Assy. (2410) 4012 0402 0603 1206 1206 0603 1206 1206 7.24 × 4.32 × 3.05 mm Body Material Ceramic Ceramic Ceramic/ Thermoplastic/ Metal Ceramic FR4 FR4 FR4 FR4 Ceramic Ceramic Ceramic Thermoplastic Current Rating 1 A to 10 A 62 mA to 15 A 62 mA to 10 A 20 A to 40 A 250 mA to 5 A 250 mA to 5 A 7A 125 mA to 5 A 250 mA to 6 A 250 mA to 8 A 10 A to 20 A 62 mA to 5 A 50 A @ 32 VDC 50 A @ 63 VAC/VDC 50 A @ 32 VAC/VDC 150 A @ 32 VDC 50 A @ 48 VAC 50 A @ 75 VDC 50 A @ 50 A @ 100 A @ 125 VAC 125 VAC/VDC 125 VAC/VDC 35 A @ 32 VDC 500 A @ 72 VDC 300 A @ 32 /VDC 300 A @ 32 VDC 35 A @ 32 VAC/VDC 35 A @ 24 VAC/VDC 50 A @ 63 VAC/VDC TE MICRO™ Fuse Hazardous Area Fuse –55°C to 150°C Footprint Interrupt Rating PICO® Fuse 13 × 8mm Ceramic body Thermoplastic coated in epoxy 62 mA to 30 A 50 mA to 6.3 A 50 A @ 125 VAC 50 A @ 125 VAC 100 A @ 125 VAC 300 A @ 125 VDC 300 A @ 125 VDC Metal/ Thermoplastic Polyamide 2 mA to 5 A 0.062 A to 5 A 50 A @ 125 VAC 10 kA @ 125 VAC/VDC 300 A @ 125 VDC Characteristics / Agency Approvals Fast Acting UL 451/453 (125 VAC/VDC) 395 (125 VAC) Fast Acting IEC Fast Acting UR 448 (125 VAC/VDC) 458 (48 VAC/75 VDC) 451/453 (125 VAC/VDC) 154 (125 VAC/VDC) 456 435 (32 VDC) (125 VAC/72 VDC) 157 (125 VAC/VDC) 467 (32 VAC/VDC) 429007.L (24 VAC/VDC) 466 (63 VAC/VDC) 438 (32 VDC) 441 (32 VDC) 437 (63 VAC/VDC) 440 (32 VAC/VDC) 501 (32 VDC) 251/253 (125 VAC/VDC) 459 (125 VAC/VDC) 275 (32 VAC/VDC) SLO-BLO® Fuse UL 272 (125 VAC/VDC) 273 (125 VAC/VDC) 396 (125 VAC) Time Lag IEC SLO-BLO® Fuse UR Hazardous Area Protection littelfuse.com 452/454 (125 VAC/VDC) 449 (125 VAC/VDC) 154T (125 VAC/VDC) 157T (125 VAC/VDC) 468 (63 VAC/VDC) 469 (63 VAC/VDC) 471 (125 VAC/VDC) 460 472 (125 VAC/VDC) (125 VAC/VDC) 473 (125 VAC/VDC) 259 (125 VAC/VDC) ≥ 250 VAC Max. Voltage Mounting Through-Hole /Fuseholder Fuse Type TR/TE Barrier Footprint 8.40 × 3.02mm Surface Mount Fuses FLAT-PAK® Fuse Cartridge 3.6mm × 10mm 4.5mm × 15mm (2 AG) 6 × 32mm (3 AG/3 AB) 5 × 20mm PICO® Fuse Body Material Thermoplastic Ceramic Ceramic Glass Ceramic Glass Ceramic Glass Thermoplastic Current Rating 40 mA and up to 10 A depending on series 0.05 A to 0.25 A 0.1 A to 10 A 250 mA to 10 A 0.050 A to 20 A 0.032 A to 16 A 0.01 A to 40 A 0.01 A to 30 A 0.062 A to 5 A 0.062 A to 5 A 35 A @ 250 VAC up to 10kA @ 125 VAC 35 A @ 250 VAC 100 A @ 250 VAC 35 A @ 250 VAC 1000 A @ 250 VAC 1500 A @ 250 VAC 35 A @ 250 VAC up to 35 A @ 300 VAC up to 50 A @ up to 50 A @ 250 VAC 20kA @ 500 VAC 400 A @ 250 VAC 150 A @ 250 VAC 100 A @ 350 VAC 250 VAC 200 A @ 250 VAC 10kA @ 1000 VAC 35 A @ 250 VAC up to 150 A @ 250 VAC depending on series Fast Acting UL 373 (250 VAC) 874 (250 VAC) Fast Acting IEC 370 (250 VAC) 876 (250 VAC) Fast Acting UR 804 (250 VAC) 807 (300 VAC) 808 (250 VAC) SLO-BLO® Fuse UL 374 (250 VAC) 875 (250 VAC) Time Lag IEC 372 (250 VAC) 382 (250 VAC) 383 (300 VAC) 392 (250 VAC) 400 (250 VAC) 877 (250 VAC) SLO-BLO® Fuse UR 369 (300 VAC) 383 (300 VAC) 4000 A @ 250 VAC/VDC EBF 6.35 × 10.16mm Cermic body coated in epoxy Interrupt Rating EBF FLAT-PAK® Fuse NANO 2® Fuse 15.24 × 6.35mm 10.1 × 3.12mm 12.1 × 4.5mm 10.1 × 3.12mm (Telecom Nano) 10.5 × 4.5mm Thermoplastic Thermoplastic Thermoplastic Ceramic Ceramic Ceramic Thermoplastic 2 A to 10 A 2 A to 10 A 0.062 A to 5 A 500 mA to 5 A 500 mA to 6.3 A 500 mA to 2 A 0.5 A to 5 A 60 A @ 600 VAC 150 A @ 250 VAC/VDC 100 A @ 350 VAC/VDC 50 A @ 250 VAC 100 A @ 350 VAC 100 A @ 350 VAC 50 A @ 250 VAC 50 A @ 250 VAC 100 A @ 250 VAC 50 A @ 125 VDC 50 A @ 125 VDC 263 (250 VAC) 202 HXG/URG (250 VAC) Characteristics / Agency Approvals 224(250 VAC) 225(250 VAC) 235 (250 VAC) 216 (250 VAC) 216SP (250 VAC) 324/314(250 VAC) 312/318 (250 VAC) 217 (250 VAC) 464 (250 VAC) 208 (350 VAC) 220 (300 VAC) 202 (250 VAC) 229(250 VAC) 230(250 VAC) 233 (125 VAC) 234 (250 VAC) 215 (250 VAC) 215SP (250 VAC) 477(500 VAC) 326/325 (250 VAC) 313/315 (250 VAC) 218 (250 VAC) 219XA high i2t (250 VAC) Electronic Ballast 600 VAC 1000 VAC Audio Hazardous Area Protection 447 (350 VAC) 446 (350 VAC) 505 (500 VAC) 461(600 VAC) 285 (250 VAC) 242 (250 VAC/VDC) NOTE: DC Protection ≥ 250 VDC Mounting Through-Hole Fuse Type Interrupt Rating 462 (350 VAC/VDC) 443 (250 VAC) 508 (1000 VAC) Max. Voltage Footprint Body Material Current Rating 203 HXG/URG (250 VAC) 203 (250 VAC) 477 (500 VAC) 977 (500 VAC) 462 (250 VAC/VDC) 465 (250 VAC) 209 (350 VAC) 500 VAC 485 (250 VAC) Surface Mount Fuses Cartridge 5 × 20mm Ceramic 0.5 A to 16 A 400 A@400 VDC up to 1500 A@400 VDC, 200 A@450 VDC TE 6 × 32mm Ceramic 0.315 A to 30 A 20kA@500 VDC, 10kA@600 VDC, 10kA@1000 VDC Thermoplastic 2 A to 5 A 10kA@250 VDC to 450 VDC NANO 2® Fuse 10.5 × 4.5mm Thermoplastic 0.5 A to 5 A 150 A@250 VDC, 100 A@350 VDC 12.1 × 4.5mm Ceramic 0.5 A to 3.15 A 100 A@600 VDC This tool should ONLY be used as a quick reference guide to suggest a starting point in the overcurrent selection process. After the initial parts have been selected, the designer should reference the below link titled Fuseology. The Fuseology document includes a Step-by-Step selection process to select the correct fuse for the application. Once a part has been selected, the designer should retrieve the actual datasheet from Littelfuse. com. Littelfuse always recommends that application testing be conducted to verify the correct part selection. In order to use this quick reference guide, the designer just has to know a few of the key parameters such as Max Voltage, Rated Current, Interrupting Rating, Mounting Type, Footprint, Fast Acting or Time Lag, and Safety Certifications. Fuseology-Fuse Characteristics, Terms and Consideration Factors: http://www.littelfuse.com/data/en/Product_Selection_Guides/Fuseology.pdf Characteristics/Agency Approvals 250 VDC UR 450 VDC UR 400 VDC Time Lag IEC 450 VDC Time Lag IEC 500 VDC Fast Acting UR 600 VDC Fast Acting UR 1000 VDC Fast Acting UR littelfuse.com 808 (250 VDC to 450 VDC) 808 (250 VDC to 450 VDC) 462 (250 VDC) 477 (400 VDC) 977 (450 VDC) 505 (500 VDC) 506 (600 VDC) 508 (1000 VDC) 485 (600 VDC) 091012 EC118N