Axial Lead & Cartridge Fuses 3AG > Fast Acting > 312/318 Series 312/318 Series PS E Lead-Free 3AG, Fast-Acting Fuse Description The 3AG Fast-Acting Fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. Features UE E>VVA>ViEUI E1E Standard 248-14 UE ,-EV>IE>EEE Lead-free UE U>>LiEEV>AIA}iE and axial lead format and with various forming dimensions Agency Approvals Ampere Range E10480 312 Series: 62mA - 10A 318 Series: 62mA - 10A 312 Series: 12A - 30A AU1410 PS E Applications Agency File Number LR 29862 312 Series: 62mA - 30A 318 Series: 62mA - 10A NBK040205E10480B/F 312/318 Series: 1A - 10A E10480 318 Series: 12A - 30A SU050015005/5006/6005/6008 312/318 Series: 1A/ 1.25A / 1.6A/ 2A - 10A Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics for Series % of Ampere Rating Ampere Rating Opening Time 100% 62mA - 35A 4 hours, Minimum 135% 62mA - 35A 1 hour, Maximum 10mA - 10A 5 sec., Maximum 12A - 30A 10 sec., Maximum 35A 20 sec., Maximum 200% 312 Series: 62mA - 10A 318 Series: 62mA - 10A (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. 1 Revised: February 15, 2012 312/318 Series 312/318 Series Agency Introduction to & Circuit Protection Axial Lead Cartridge Fuses 3AG > Fast Acting > Transientology 312/318 Series Electrical Characteristic Specifications by Item Agency Approvals Nominal Cold Resistance (Ohms) Nominal Melting 2 I t (A2 sec) 250 24.7000 0.000249 x x x 250 11.2800 0.00102 x x x Amp Code Ampere Rating (A) Voltage Rating (V) .062 0.062 .100 0.1 .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 3.0200 0.0165 x x x .250 0.25 250 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 1.75 1.75 250 0.0856 3.60 x x x x 01.8 1.8 250 0.0825 3.85 x x x x 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 0.0178 118.0 x x x x x 007. 7 250 0.0146 118.0 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 32 025.* 25 32 * Interrupting Rating 35A@250Vac 10KA@125Vac 100A@250Vac 10KA@125Vac 200A@250Vac 10KA@125Vac 300A@32 Vac PS E x 0.0035 1029 x x x 0.0024 2041 x x** x x ** x 030. 30 32 0.0019 3717 035. 35 32 0.0013 7531 x NOTES: ** For 318 Series 12A to 30A, the agency approval is only cURus. 312/318 Series 2 (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. 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 Rerating Curve TIME IN SECONDS 100 10 1 0.1 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. Recommended Process Parameters: 280 260 240 Wave Parameter 220 200 (Depends on Flux Activation Temperature) 180 160 140 120 100 80 60 40 240 230 220 210 200 190 180 170 160 150 140 130 120 110 90 100 80 70 60 50 40 30 20 0 20 0 Lead-Free Recommendation Preheat: 10 Temperature (C) - Measured on bottom side of board 300 100 C Temperature Maximum: 150 C Preheat Time: 60-180 seconds Solder Pot Temperature: 260 C Maximum Solder Dwell Time: 2-5 seconds Recommended Hand-Solder Parameters: Time (Seconds) Cooling Time Preheat Time /V>EOAIAE,iVi>I(R) Temperature Minimum: -iAEAE/iiA>IOAi\EEIxacE EEExc i>I}E/i\EExEAiVAE>Y Dwell Time Note: These devices are not recommended for IR or Convection Reflow process. (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information. 3 312/318 Series 312/318 Series Soldering Parameters - Wave Soldering Introduction to & Circuit Protection Axial Lead Cartridge Fuses 3AG > Fast Acting > Transientology 312/318 Series Product Characteristics Materials Body: Glass Cap: Nickel-plated brass Leads: Tin-plated Copper Terminal Strength -/ OaO]EiI EO]EE Test Condition A Solderability ,iviAiViE EEaOCE-iVE IE 2003-01 Annex A Cap1: Product Marking Brand logo, current and voltage ratings Series and agency approval marks Cap2: Dimensions Operating Temperature qxx EIEOx Thermal Shock -/ OaO]EiI EaC]EE/iAIE IE \ExEVViAEExc EIEOxc (R) Vibration -/ OaO]EiI EOaE Humidity -/ OaO]EiI EaI ]EE /iAIE IE\E} E,Ex(R)]E and Elevated temperature (40C) for 240 hours Salt Spray -/ OaO]EiI Ea ]EE Test Condition B Part Numbering System Measurements displayed in millimeters (inches) 0312 xxxx M X P 312 Series Series 6.35 (.25") Amp Code Refer to Amp Code column of Electrical Characteristics Table 31.75 (1.25") Quantity Code M = 1000 318 Series Packaging Code 0.813 (.032") (0.062-15A) 1.016 (.040") (20-35A) X = Filler 6.985 (.275") Lead-free 32.72 (1.288") Axial Lead Material: Tin Coated Copper 39.68 (1.56") TYP. Standard Length 12.70 (0.50") TYP Short Lead Option Packaging Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk N/A 1000 MX N/A Bulk N/A 100 8 N/A Bulk N/A 1000 MX N/A Bulk N/A 100 8 N/A Bulk N/A 1000 MXB N/A Packaging Option 312 Series 318 Series 312/318 Series 4 (c) 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/312.html or /318.html for current information.