Axial Lead & Cartridge Fuses 3AG > Time Lag > 373/375 Series 373/375 Series Lead-Free 3AG, Slo-Blo® Fuse RoHS Pb Description The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features • In accordance with UL Standard 248-14 • Available in cartridge and axial lead format and with various forming dimensions Agency Approvals Agency • RoHS compliant and Lead-free Agency File Number Ampere Range Applications E10480 LR 29862 12A, 15A Used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. Electrical Characteristics by Series © 2014 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/16/14 % of Ampere Rating Ampere Rating Opening Time 100% 12A, 15A 4 hours, Minimum 135% 12A, 15A 1 hour, Maximum 200% 12A, 15A 5 sec., Min., 60 sec Max Axial Lead & Cartridge Fuses 3AG > Time Lag > 373/375 Series Electrical Characteristic Specifications by Item Ampere Rating (A) 012. 12 125 015. 15 125 Interrupting Rating Nominal Melting I2t (A2 sec) 0.0065 1200 x x x 0.0050 1870 x x x 10kA@125Vac Temperature Rerating Curve Agency Approvals Nominal Cold Resistance (Ohms) Average Time Current Curves 12A 15A Amp Code Voltage Rating (V) 1000 TIME IN SECONDS 100 10 1 0.1 0.01 0.001 0.01 0.1 1 10 CURRENT IN AMPERES 100 1000 Soldering Parameters - Wave Soldering Recommended Process Parameters: 280 Wave Parameter 260 Lead-Free Recommendation Preheat: 240 220 (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 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. © 2014 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/16/14 Axial Lead & Cartridge Fuses 3AG > Time Lag > 373/375 Series Product Characteristics Materials Body: Glass Cap: Nickel–plated brass Leads: Tin–plated Copper Operating Temperature –55ºC to +125ºC Terminal Strength MIL-STD-202G, Method 211A, Test Condition A Thermal Shock MIL-STD-202G, Method 107G, Test Condition B: (5 cycles -65°C to +125°C) Reference IEC 60127 Second Edition 2003-01 Annex A Vibration MIL-STD-202G, Method 201 A Solderability Humidity Product Marking Cap1: Brand logo, current and voltage ratings Cap2: Series and agency approval marks MIL-STD-202G, Method 103B, Test Condition A: High RH (95%) and Elevated temperature (40°C) for 240 hours Salt Spray MIL- STD-202G, Method 101D, Test Condition B Dimensions Part Numbering System 037 xxxx M X P Measurements displayed in millimeters (inches) 373 000P Series (cartridge) 375 000P Series (axial leaded) 6.35±0.3 (.25") Series Amp Code 6.985±0.3 (.275") 31.75±1.12 (1.25") Refer to Amp Code column of Electrical Characteristics Table 32.39±1.12 (1.275") Axial Lead Diameter: 0.81±0.05 (.032") for (0.01A - 15A) 1.02±0.06 (.040") for (20A - 30A) Quantity Code Axial Lead Length: 38.1±3.15 (1.50") TYP. M = 1000 Packaging Code Axial Lead Material: Tin-coated copper X = Filler Lead-free Packaging Packaging Specification Quantity Quantity & Packaging Code Taping Width Bulk Bulk N/A N/A 1000 100 MX HX N/A N/A Bulk Bulk Bulk N/A N/A N/A 1000 100 1000 MX HX MXB N/A N/A N/A Packaging Option 373 Series 375 Series © 2014 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/16/14