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 • RoHS compliant and Lead-free • In accordance with UL Standard 248-14 • Available in cartridge and axial lead format and with various forming dimensions Agency Approvals Agency PS E Agency File Number Ampere Range E10480 312 Series: 0.062A - 30A 318 Series: 0.062A - 10A Applications Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. 29862 312 Series: 0.062A - 30A 318 Series: 0.062A - 10A NBK040205-E10480B/F NBK040205-E10480D/H 312/318 Series 1A-5A 312/318 Series 6A-10A E10480 318 Series: 12A - 30A SU05001-6008 SU05001-5005 SU05001-5006 312/318 Series: 1-2A 312/318 Series: 3-6A 312/318 Series: 7-10A N/A 312 Series: 0.062A - 10A 318 Series: 0.062A - 10A 200% Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time 100% 0.062A – 35A 4 hours, Minimum 135% 0.062A – 35A 1 hour, Maximum 0.062A – 10A 5 sec., Maximum 12A – 30A 10 sec., Maximum 35A 20 sec., Maximum Additional Information © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Revised: 08/10/15 Datasheet 312 Series Resources 312 Series Samples 312 Series Datasheet 318 Series Resources 318 Series Samples 318 Series Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Electrical Characteristic Specifications by Item Amp Code Ampere Rating (A) Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2 sec) Agency Approvals PS E .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 .250 0.25 250 .300 0.3 250 .375 0.375 250 0.8250 0.185 x x x .500 0.5 250 0.4980 0.483 x x x 35A@250Vac 10KA@125Vac 3.0200 0.0165 x x x 2.0100 0.0355 x x x 1.4050 0.0689 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 x x x x x x x x x x 01.5 1.5 250 0.1036 2.35 x 01.6 1.6 250 0.0934 2.80 x 1.75 1.75 250 0.0856 3.60 x 100A@250Vac 10KA@125Vac 01.8 1.8 250 002. 2 250 0.0825 3.85 x 0.0704 5.20 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 x x 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 0.0178 118.0 x x x x x 007. 7 250 0.0146 81.0 x x x x x 200A@250Vac 10KA@125Vac 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 0.0035 1414 x ** x x 025.* 25 32 0.0024 2041 x x** x 030. 30 32 0.0019 3717 x x x 035. 35 32 0.0013 7531 * 300A@32 Vac ** NOTES: ** For 318 Series 12A to 30A, the agency approval is only cURus. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15 Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series .250 A .375 A .500 A .750 A 1A 1.5 A 2A 2.5 A 3A 4A 5A 6A 7A 8A 10 A 1000 .125 A Average Time Current Curves .062 A Temperature Re-rating Curve TIME IN SECONDS 100 10 1 0.1 Note: Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation. 0.01 0.005 0.01 1 0.1 CURRENT IN AMPERES 10 100 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: 280 Wave Parameter 260 240 Lead-Free Recommendation Preheat: 220 (Depends on Flux Activation Temperature) 200 180 160 140 120 100 80 60 (Typical Industry Recommendation) Temperature Minimum: 100°C Temperature Maximum: Preheat Time: 150°C 60-180 seconds Solder Pot Temperature: 260°C Maximum Solder Dwell Time: 2-5 seconds 40 Recommended Hand-Solder Parameters: Time (Seconds) Cooling Time Preheat Time Dwell Time © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15 240 230 220 210 200 190 180 170 160 150 140 130 120 110 90 100 80 70 60 50 40 30 0 0 20 20 10 Temperature (°C) - Measured on bottom side of board 300 Solder Iron Temperature: 350°C +/- 5°C Heating Time: 5 seconds max. Note: These devices are not recommended for IR or Convection Reflow process. Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series Product Characteristics Materials Body: Glass Cap: Nickel–plated brass Leads: Tin–plated Copper Terminal Strength MIL-STD-202, Method 211, Test Condition A Solderability MIL-STD-202 method 208 Product Marking Cap1: Brand logo, current and voltage ratings Cap2: Series and agency approval marks Dimensions Operating Temperature –55ºC to +125ºC Thermal Shock MIL-STD-202, Method 107, Test Condition B: (5 cycles -65°C to +125°C) Vibration MIL-STD-202, Method 201 Humidity MIL-STD-202, Method 103, Test Condition A: High RH (95%), and Elevated temperature (40°C) for 240 hours Salt Spray MIL-STD-202, Method 101, Test Condition B Part Numbering System Measurements displayed in millimeters (inches) 312 000 Series (cartridge) 0312 xxxx M X P 318 000 Series (axial leaded) 6.35±0.3 (.25") Series 6.985±0.3 (.275") 31.75±1.12 (1.25") 32.72±1.12 (1.288") Axial Lead Diameter: 0.81±0.05 (.032") Axial Lead Material: Tin-coated copper Axial Lead Length: Standard Length: 39.68 (1.56") TYP. Short Lead Option: 12.70 (0.50”) TYP Amp Code Refer to Amp Code column of Electrical Characteristics Table Quantity Code M = 1000 Packaging Code X = Filler Lead-free Packaging Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk N/A 1000 MX N/A Bulk N/A 100 HX N/A Bulk N/A 1000 MX N/A Packaging Option 312 Series 318 Series Bulk N/A 100 HX N/A Bulk N/A 1000 MXB N/A © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/10/15