FUSE SELECTION GUIDE A quick reference guide to selecting fuses for electronic applications Max. Voltage < 250VAC/VDC Mounting Surface Mount Fuses Fuse Type NANO 2® Fuse Through-Hole Thin Film Fuse Ceramic Chip Fuse –55°C to 90°C PICO® SMF Fuse PICO® Fuse TE MICRO™ Fuse Hazardous Area Fuse –55°C to 150°C Footprint 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 1A to 10A 62 mA to 20A depending on series 62 mA to 10A 20A to 40A 250 mA to 5A 250 mA to 5A 7A 10A to 20A 62 mA to 5A depending on series 62 mA to 30A depending on series 50 mA to 6.3A 2 mA to 5A 0.062A to 5A 50A @ 125VAC/VDC 300A @ 32VDC 100A @ 125VAC 180A @ 72VDC up to 500A @ 72VDC depending on rating 35A @ 32VDC 35A @ 32VAC/ VDC 35A @ 24VAC/ VDC 150A @ 32VDC 50A @ 125VAC 50A @ 125VDC up to 300A @ 125VDC depending on rating 50A @ 32VAC up to 50A @ 125VAC 300A @ 32VDC 100A @ 125VAC 10 kA @ 125VAC/VDC 50A @ 125VAC 300A @ 63VDC up to 300A @ 125VDC depending on rating Interrupt Rating 50A @ 65VAC 50A @ 32VAC up to 50A @ 125VAC up to 50A @ 48VAC 50A @ 65VDC up to 50A @ 1245VDC 50A @ 63VDC 300A @ 24VDC up to 50A @ 75VDC up to 100A @ 75 VDC 250 mA to 6A 250 mA to 8A 125 mA to 10A depending on depending on depending on series series series 50A @ 24VDC 35A @ 24VAC/VDC up to 50A up to 50A @ 32VDC @ 63VAC/VDC depending on depending on rating rating 50A @ 24VAC/VDC up to 50A @ 63VAC/VDC depending on rating 13 × 8mm Ceramic body Metal/ Thermoplastic coated in epoxy Thermoplastic Polyamide Characteristics / Agency Approvals 451/453 (125VAC/VDC) Fast Acting UL 395 (125VAC) 456 (125 VAC/72 VDC) Only 20 to 30A Fast Acting IEC Fast Acting UR 458 (48 VAC/ 75 VDC) 448 (125VAC/VDC) 451/453 (125VAC/VDC) 154 (125VAC/VDC) 157 (125VAC/VDC) 456 (125 VAC/72 VDC) 467 429007.L 435 (32VAC/ (24VAC/ (32VDC) VDC) VDC) 466 (63VAC/VDC) 438 (32VDC) 441 (32VDC) 437 (63VAC/VDC) 440 (32VAC/VDC) 501 (32VDC) 459 (125VAC/VDC) 251 (125VAC/VDC) 275 (32VAC/VDC) 272 (125VAC/VDC) 273 (125VAC/VDC) 396 (125VAC) SLO-BLO® Fuse UL Time Lag IEC SLO-BLO® Fuse UR Hazardous Area Protection littelfuse.com 452/454 (125VAC/VDC) 449 (125VAC/VDC) 154T (125VAC/VDC) 157T (125VAC/VDC) 468 (63VAC/VDC) 469 (63VAC) 460 (125VAC/VDC) 471 (125VAC/VDC) 472 (125VAC/VDC) 473 (125VAC/VDC) 259 (125VAC/VDC) 259 UL 913 (125VAC/VDC) ≥ 250VAC Max. Voltage Mounting Through-Hole /Fuseholder Surface Mount Fuses PICO Fuse ® Fuse Type TR/TE Barrier Cartridge Footprint Body Material Thermoplastic Ceramic 3.6mm × 10mm 4.5mm × 15mm (2 AG) Ceramic Glass 5 × 20mm EBF EBF 6 × 32mm (3 AG/3 AB) Ceramic Glass Ceramic Glass FLATPAK® Fuse NANO 2® Fuse 6.35 × 10.16mm 10.1 × 3.12mm Cermic body coated in epoxy Thermoplastic 12.1 × 4.5mm Ceramic Ceramic Ceramic Thermoplastic 500 mA to 2 A 500mA to 5 A 60 A @ 600VAC 150 A @ 250VAC/ VDC up to 100 A @ 350VAC/VDC depending on rating Thermoplastic Thermoplastic 500 mA to 5A 15A to 30A 250mA to 6.3 A depending on series 50 A @ 250VAC 100 A @ 250VAC 50 A @ 100VDC 100 A @ 250VAC Current Rating 40 mA and up to 10 A depending on series 50mA to 750mA depending on series 50mA to 10 A depending on series 100mA to 10 A depending on series 50mA to 20 A depending on series 32mA to 16 A depending on series 125mA to 40 A depending on the series 10mA to 30 A depending on series 62mA to 5 A 2 A to 10 A 2 A to 10 A 62mA to 5 A depending on series Interrupt Rating 35A @ 250VAC up 100A @ 300VAC depending on rating 1500A @ 277VAC/VDC up to 4000 A @ 250VAC/ VDC depending on rating 35 A @ 250VAC up to 63 A @ 250VAC depending on rating 400 A @ 125VAC up to 100 A @ 350VAC depending on rating 400 A @ 250VAC up to 1500A @ 250VAC or 200 A @ 420VAC or 100 A @ 500VAC depending on rating 35 A @ 250VAC up to 200 A @ 250VAC, 10kA @ 125VAC depending on rating 35 A @ 250VAC up to 1000 A @250VAC or 1000A @ 500VAC up to 20ka @ 450VAC or 10ka @ 1000VAC depending on rating 300 A @ 32VAC up to 200 A @ 250VAC depending on rating 50 A @ 250VAC 100 A @ 350VAC 100 A @ 350VAC 50 A @ 250VAC Ceramic 10.1 × 3.12mm 10.1 x 3.12 mm (Telecom Nano) 10.5 × 4.5mm Characteristics / Agency Approvals Very Fast Acting 231 (500VAC) Fast Acting UL 373 (250VAC) 874 (250VAC) Fast Acting IEC 370 (250VAC) 876 (250VAC) Fast Acting UR 808 (250VAC) 242 (250VAC/VDC) 224 (250VAC) 225 (250VAC) 235 (250VAC) 216 (250VAC) 216SP (250VAC) Time Lag IEC SLO-BLO® Fuse UR 312/318 (250 VAC) 217 (250VAC) 464 (250VAC) 208 (350VAC) 220 (300VAC) 263 (250VAC) Medium Acting UL SLO-BLO® Fuse UL 324/314 (250VAC) 202 (250VAC) 463 (250VAC/100VDC) 485 (250VAC) 201 (250VAC) 374 (250VAC) 875 (250VAC) 372 (250VAC) 382 (250VAC) 392 (250VAC) 400 (250VAC) 804 (250VAC) 369 (300VAC) 383 (300VAC) 807 (300VAC) 229 (250VAC) 230 (250VAC) 233 (125VAC) 234 (250VAC) 215 (250VAC) 215SP (250VAC) 835 (250VAC) 477 (500VAC) 877 (250VAC) 326/325 (250VAC) 313/315 (250 VAC) 218 (250VAC) 219XA high i2t (250VAC) 203 (250VAC) 209 (350VAC) Electronic Ballast 420VAC/VDC 447 (350VAC) 443 (250VAC) 446 (350VAC) 328 (300VAC/100VDC) 300VAC 477 (500VAC) 977 (500VAC) 505 (500VAC) 600VAC 461 (600VAC) 1000VAC 508 (1000VAC) Audio 285 (250VAC) 242 (250VAC/VDC) 305 (277VAC/277VDC) Hazardous Area Protection Max. Voltage Mounting DC Protection ≥ 250 VDC Through-Hole Fuse Type Interrupt Rating Surface Mount Fuses Cartridge 5 × 20mm Ceramic 500mA to 20A depending on series 400A @ 400VDC up to 1500A @ 400VDC or 300A @ 420VDC or 200A @ 450VDC depending on rating 6x25mm Ceramic 5A to 40A 5 to 40A 2500A @ 70VDC 40A 1500A @ 250VAC TE 6 × 32mm Ceramic 315mA to 30A depending on series 1000A @ 250VDC up to 10kA @ 1000VDC depending on rating NANO 2® Fuse Thermoplastic 1A to 5A 10.5 × 4.5mm Thermoplastic 500mA to 5A 12.1 × 4.5mm Ceramic 500mA To 3.15A 10ka @ 250VDC up to 10kA @ 450VDC 150A@250 VDC 100 A@350 VDC 100A@600 VDC littelfuse.com 688 (70 VDC) 808 (250 VDC to 450 VDC) 487 (420VDC) NOTE: 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 70VDC 250VDC 420VDC 450VDC 400VDC Time Lag IEC 450VDC Time Lag IEC 500VDC 600VDC 1000VDC 462 (350VAC/VDC) 487 (420VAC/VDC) 500VAC Footprint Body Material Current Rating 462 (250VAC/VDC) 465 (250VAC) 462 (250 VDC) 504 (420VDC) 808 (250 VDC to 450 VDC) 477 (400 VDC) 977 (450 VDC) 505 (500 VDC) 506 (600 VDC) 508 (1000 VDC) 485 (600 VDC) EC118Nv0116