Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series 312/318 Series Lead-Free 3AG, Fast-Acting Fuse RoHS Pb PS E Description The 3AG Fast-Acting Fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. Features • In accordance with UL • RoHS compliant and Standard 248-14 Lead-free • Available in cartridge and axial lead format and with various forming dimensions Agency Approvals Applications Agency Agency File Number Ampere Range Used as supplementary protection in appliance or E10480 0.062A - 25A utilization equipment to provide individual protection for 312 Series: 0.062A - 30A components or internal circuits. 29862 318 Series: 0.062A - 10A (312 Series) Electrical Characteristics for Series NBK040205-E10480B 1A - 5A NBK040205-E10480F 6A - 10A % of Ampere PS Ampere Rating Opening Time E Rating (318 Series) NBK040205-E10480D 1A - 5A 100% 0.062A – 35A 4 hours, Minimum NBK040205-E10480H 6A - 10A 135% 0.062A – 35A 1 hour, Maximum E10480 318 Series: 12A - 30A 0.062A – 10A 5 sec., Maximum 200% 12A – 30A 10 sec., Maximum SU05001-6008 1A - 2A SU05001-5005 3A - 6A 35A 20 sec., Maximum SU05001-5006 7A - 10A N/A 0.062A - 10A Additional Information Datasheet Resources Samples Accessories 312 Series 312 Series 312 Series 312 & 318 Series Datasheet Resources Samples 318 Series 318 Series 318 Series For recommended fuse accessories for this product series, see ‘Recommended Accessories’ section. © 2018 Littelfuse, Inc. Application testing is strongly recommended.Specifications are subject to change without notice. Revised: 06/06/18

Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Electrical Characteristic Specifications by Item Nominal Agency Approvals Voltage Nominal Amp Ampere Interrupting Cold Rating Melting Code Rating (A) Rating Resistance PS (V) I2t (A2 sec) E (Ohms) .062 0.062 250 24.7000 0.000249 x x x .100 0.1 250 11.2800 0.00171 x x x .125 0.125 250 7.1450 0.00289 x x x .150 0.15 250 5.1300 0.00550 x x x .175 0.175 250 3.8750 0.00960 x x x .187 0.187 250 3.4200 0.0128 x x x .200 0.2 250 35A@250Vac 3.0200 0.0165 x x x .250 0.25 250 10KA@125Vac 2.0100 0.0355 x x x .300 0.3 250 1.4050 0.0689 x x x .375 0.375 250 0.8250 0.185 x x x .500 0.5 250 0.4980 0.483 x x x .600 .6 250 0.3620 0.880 x x x .750 0.75 250 0.2445 1.84 x x x 001. 1 250 0.1900 0.760 x x x x x 1.25 1.25 250 0.1385 1.45 x x x x x 01.5 1.5 250 0.1036 2.35 x x x x 01.6 1.6 250 0.0934 2.80 x x x x x 1.75 1.75 250 0.0856 3.60 x x x x 100A@250Vac 01.8 1.8 250 0.0825 3.85 x x x x 10KA@125Vac 002. 2 250 0.0704 5.20 x x x x x 2.25 2.25 250 0.0594 7.20 x x x x x 02.5 2.5 250 0.0513 9.54 x x x x x 003. 3 250 0.0427 14.0 x x x x x 004. 4 250 0.0293 28.5 x x x x x 005. 5 250 0.0224 50.0 x x x x x 006. 6 250 200A@250Vac 0.0178 118.0 x x x x x 007. 7 250 10KA@125Vac 0.0146 81.0 x x x x x 008. 8 250 0.0122 166.0 x x x x x 010. 10 250 0.0093 298.0 x x x x x 012. 12 32 0.0072 234.6 x x** x 015. 15 32 0.0052 490.5 x x** x 020. 20 32 300A@32 Vac 0.0035 1414 x x** x 025. 25 32 0.0024 2041 x x** x 030. 30 32 0.0019 3717 x** x 035. 35 32 0.0013 7531 NOTES: ** For 318 Series 12A to 30A, the agency approval is only cURus. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/06/18

Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Temperature Re-rating Curve Average Time Current Curves 1000 .062 A .125 A .250 A.375 A.500 A.750 A1 A1.5 A2 A2.5 A3 A4 A5 A6 A7 A8 A10 A 100 S D N O C10 E S N E I M TI 1 Note: 0.1 Rerating depicted in this curve is in addition to the industry practice derating of 25% for continuous operation. 0.01 0.0050.01 0.1 1 10 100 CURRENT IN AMPERES Please contact Littelfuse for more details on those T-C Curves of other ampere ratings which are not published. Soldering Parameters - Wave Soldering Recommended Process Parameters: 300 C) - Measured on bottom side of board 11111222228024680246800000000000 ( SPD roe eTTPpleedhermmneeedhraspp e WtPoee:anorrat aaF tTvttl Tuuuiexmerr eeAmPec aMMt:pirveaaiantrmixoaiminmte Tuuteuremmemrp::e:rature) (1162T05y06Lp00-0ei1c°°°aa8CCCld 0I n- MdFsuerasectxreoyim nRRdeuecsmcomommemndeatniodn)ation mperature (° 246000 RSeocldoemr mDweenldl Teidm eH:and-Solder 2P-a5r saemcoentdesrs: Te 00 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 Solder Iron Temperature: 350°C +/- 5°C Time (Seconds) Heating Time: 5 seconds max. Preheat Time Cooling Time Note: These devices are not recommended for IR or Dwell Time Convection Reflow process. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/06/18

Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Product Characteristics Body: Glass Operating –55ºC to +125ºC Materials Cap: Nickel–plated brass Temperature Leads: Tin–plated Copper Thermal MIL-STD-202, Method 107, Test Condition B: (5 Terminal Strength MIL-STD-202, Method 211, Shock cycles -65°C to +125°C) Test Condition A Vibration MIL-STD-202, Method 201 Solderability MIL-STD-202 method 208 MIL-STD-202, Method 103, Cap1: Brand logo, current and voltage Humidity Test Condition A: High RH (95%), ratings Product Marking and Elevated temperature (40°C) for 240 hours Cap2: Series and agency approval marks MIL-STD-202, Method 101, Salt Spray Test Condition B Dimensions Part Numbering System Measurements displayed in millimeters (inches) 0312xxxx M X P 312 000 Series 318 000 Series (cartridge) (axial leaded) Series 312 = Cartridge 6.35±0.3 6.985±0.3 318 = Axial Leaded (.25") (.275") Amp Code 31.75±1.12 32.72±1.12 Refer to Amp Code column of (1.25") (1.288") Electrical Characteristics Table Axial Lead Diameter: Axial Lead Length: Quantity Code 0.81±0.05 (.032") Standard Length: 39.68 (1.56") TYP. M = 1000 Axial Lead Material: Short Lead Option: Packaging Code Tin-coated copper 12.70 (0.50”) TYP X = Filler Lead-free Packaging Quantity & Packaging Option Packaging Specification Quantity Taping Width Packaging Code 312 Series Bulk N/A 1000 MX N/A Bulk N/A 100 HX N/A 318 Series Bulk N/A 1000 MX N/A Bulk N/A 100 HX N/A Bulk N/A 1000 MXB N/A © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/06/18

Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Recommended Accessories Max Max Accessory Series Description Application Application Type Voltage Amperage 155100 Twist-Lock In-Line Fuseholder 32 20 342 Traditional Panel Mount Fuseholder 250 20 Holder 346 Panel Mount Flip-Top Shock-Safe Fuseholder 250 15 345 Shock-Safe Fuseholder with PC Mount, Solder Mount and Panel Mount options 250 20 354 Low Profile OMNI-BLOK® Fuse Block 30 Block 600 359 High Current Screw Terminal Fuse Block 30 122 High Current Traditional PC Board Fuse Clip 1000 30 Clip 101 Rivet/Eyelet Type Fuse Clip 1000 15 Notes: 1. Do not use in applications above rating. 2. Please refer to fuseholder data sheet for specific re-rating information. 3. Please contact factory for applications greater than the max voltage and amperage shown. Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/06/18