Surface Mount Fuses Thin Film > 1206 Size > Very Fast Acting > 433 Series 433 Series Fuse ® ® Description The 433 series fast-acting surface mount fuse series is a small (1206 size) thin-film device designed for secondary protection of circuits used in space constrained applications such as hand-held portable electronic devices. For RoHS compliant and lead-free design, please refer to the Littelfuse 466 series thin film fuse. For new designs of 7 amp please refer to Littelfuse 429 series thin film fuse. Features Agency Approvals Agency Agency File Number ® ® Ampere Range E10480 125mA - 5A LR29862 125mA - 5A improved performance in pick-and-place operations and an alternate solution for height critical application. t 5IF4MJN-JOF fuse is an extremely small, low profile design (1206 chip size) utilizing thin-film technology to achieve precise control of electrical characteristics. t .PVOUJOHQBEBOE electrical specification are identical to the popular 429 Series specifications. t 5IFMPXFSIFJHIUQSPmMF produces a flat surface for Applications Electrical Characteristics for Series Secondary protection for space constrained applications such as: % of Ampere Rating Opening Time at 25OC 100% 4 hours, Minimum t $FMMQIPOFT t %7%QMBZFST 200% 5 sec., Maximum t #BUUFSZQBDLT t )BSEEJTLESJWFT 300% t %JHJUBMDBNFSBT 0.2 sec., Maximum Electrical Specifications by Item Ampere Rating (A) 0.125 0.200 0.250 0.375 0.50 0.60 0.75 0.80 1.00 1.25 1.50 1.75 2.00 2.50 3.00 4.00 5.00 Amp Code .125 .200 .250 .375 .500 .600 .750 .800 001. 1.25 01.5 1.75 02.0 02.5 03.0 04.0 05.0 Max Voltage Rating (V) 125 125 125 125 63 63 63 63 63 63 63 63 63 32 32 24 24 Interrupting Rating 50A @125 V AC/DC 50A @63 V AC/DC 50A @32 V AC/DC 50A @24 V AC/DC Nominal Cold Resistance (Ohms) 3.45000 0.93800 0.62500 0.37500 0.24050 0.21000 0.13700 0.12250 0.09950 0.07475 0.06250 0.05000 0.03975 0.03065 0.02625 0.01400 0.01100 Nominal Melting I2t (A2sec) 0.00040 0.00055 0.00100 0.00280 0.00600 0.01310 0.01700 0.03050 0.03500 0.06500 0.12500 0.15000 0.23000 0.50000 0.70000 1.0240 1.6000 Agency Approvals ® ® x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage. ©2008 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for the most current information 7 Revision: February 13, 2008 433 Series Surface Mount Fuses Thin Film > 1206 Size > Very Fast Acting > 433 Series Average Time Current Curves .125A .200A .25A .375A .5A .6A .75A .8A 1A 1.25A 1.5A 1.75A 2A 2.5A 3A 4A 5A Temperature Rerating Curve 100 TIME IN SECONDS 10 1 0.1 0.01 0.001 0.1 1 10 CURRENT IN AMPERES 100 Soldering Parameters - Wave Soldering Reflow Condition Pre Heat Pb – Free assembly - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (Min to Max) (ts) 60 – 180 secs Average ramp up rate (Liquidus Temp (TL) to peak 5°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) 60 – 150 seconds Peak Temperature (TP) 250+0/-5 °C Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Ramp-down Rate 5°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max. Do not exceed 260°C 433 Series 8 Revision: February 13, 2008 ©2008 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for the most current information Surface Mount Fuses Thin Film > 1206 Size > Very Fast Acting > 433 Series Product Characteristics Body: Epoxy Substrate Terminations: 95% Tin / 5% Lead over Nickel over Copper Element Cover Coat: Conformal Coating Materials Operating Temperature – 55OC to 90OC. Consult temperature rerating curve chart. Thermal Shock Withstands 5 cycles of – 55OC to 125OC Dimensions MIL-STD-202F Method 103B Condition D Vibration Per MIL-STD-202F, Method 201A Insulation Resistance (After Opening) Greater than 10,000 ohms. Resistance to Soldering Heat Withstands 60 seconds above 200OC and up to 260OC, maximum Part Marking System MARKING CODE VARIES WITH AMPERAGE RATING (SEE CHART) .66 (.026") Sn/Pb .58 (.023") Coating .56 (.022") 3.18 (.125") Cu Humidity Sn/Pb Sn/Pb 1.52 (.060") 3.18 (.125") 1.65 (.065") 1.52 (.060") 4.83 (.190") 2.03 (.080") WAVE SOLDER 3.81 (.150") 1.27 (.050") 1.14 (.045") 2.03 (.080") REFLOW SOLDER Amp Code Marking Code .125 B .200 C .250 D .375 E .500 F .600 .6 .750 G .800 .8 001. H 1.25 J 01.5 K 1.75 L 002. N 02.5 O 003. P 03.5 R 004. S 005. T Part Numbering System 0433 .125 NR SERIES AMP CODE QUANTITY CODE Packaging Packaging Option Packaging Specification Quantity Quantity & Packaging Code Tape & Reel – 8mm tape EIA RS-481-1 (IEC 286, part 3) 5000 NR ©2008 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for the most current information 9 Revision: February 13, 2008 433 Series