451/453 Series - Littelfuse

1 Fuse Datasheet 2021 Littelfuse , are subject to change without : GD. 08/23/211451/453 Series Very Fast-Acting FuseDescriptionThe Nano2 SMF Fuse is a very small, Wire-in-Air (WIA) square shape surface mount fuse that was designed for secondary side circuit over-current protection applications. These fuses are designed for PCB using surface mount ApprovalsAgencyAgency File NumberAmpere - - 15AJ504467311A, , 2A, , , 4A, 5A, 7A, 8A, 10A, 12A, - - 5 ANA1A, , 2A, , , 4A, 5A, 7A, 8A, 10A, 12A, 20 AElectrical Characteristics for SeriesFeatures & Benefits Very fast-acting Small size Wide range of current rating available ( to 20A) Wide operating temperature range RoHS compliant and Halogen Free UL Listed and Recognized to UL/CSA/NMX UL 248-1 and UL/CSA/NMX UL 248-14 (see Agency Approvals)

2 Conforms to DENAN s Appendix 3 Conforms to IEC/EN 60127-1 and IEC/EN 60127-7% of Ampere RatingAmpere RatingOpening Time10 0% 204 hours, Minimum200% 105 sec., Maximum12 2020 sec., MaximumRoHSPSEA pplications Notebook PC LCD/PDP TV LCD monitor LCD/PDP panel LCD backlight inverter Portable DVD player Power supply Networking PC server Cooling fan system Storage system Telecom system Wireless basestation White goods Game console Office Automation equipment Battery charging circuit protection Industrial equipmentResources451 SeriesAccessories451 SeriesSamples451 SeriesAdditional InformationResources453 SeriesAccessories453 SeriesSamples453 SeriesFuse Datasheet 2021 Littelfuse .

3 Are subject to change without : GD. 08/23/212451/453 Series Very Fast-Acting FuseElectrical Specifications by ItemAmpere Rating(A)Amp CodeMaxVoltage Rating (V)InterruptingRatingNominal Cold Resistance (Ohms)Nominal Melting I2t (A2sec)Agency @125 VAC/VDC300A @32 VDCPSE: 100A 0 00 @125 VAC/VDC10,000A @75 VDC300A @32 VDCPSE: 100A @125 VAC/VDC 400a @32 VDCPSE: 100A 0 00 0 @125 VAC/50A @125 VDC400A @32 VDCPSE: 100A @65 VDC100A @65 VAC400A - l2t calculated at 8ms. - Resistance is measured at 10% of rated current, 25 CFuse Datasheet 2021 Littelfuse , are subject to change without : GD.

4 08/23/213451/453 Series Very Fast-Acting IN SECONDSCURRENT IN AMPSFast Acting Series TC Curve Time Current CurvesReflow ConditionPb Free assemblyPre Heat- Temperature Min (Ts(min))150 C - Temperature Max (Ts(max))200 C- Time (Min to Max) (ts)60 180 secsAverage ramp up rate (Liquidus Temp (TL) to peak5 C/second (max) to TL - Ramp-up Rate5 C/second Temperature (TL) (Liquidus)217 C - Temperature (tL)60 150 secondsPeak Temperature (TP)260+0/ 5 CTime within 5 C of actual peak Temperature (tp)20 40 secondsRamp-down Rate5 C/second 25 C to peak Temperature (TP)8 minutes not exceed260 CSoldering ParametersTemperature Re-rating CurveNote:1.)

5 Rerating depicted in this curve is in addition to the standard derating of 25% for continuous Soldering Parameters260 C Peak Temperature, 10 seconds (max)TS(min)25tPtLtStime to peak temperature(t 25 C to peak)Ramp-downRamp-upPreheatCritical ZoneTL to TPFuse Datasheet 2021 Littelfuse , are subject to change without : GD. 08/23/214451/453 Series Very Fast-Acting FuseMaterialsBody: CeramicTerminations:Gold-Plated Caps / Sn-dipped Silver Plated Caps (451 RoHS/HF Series )Silver-plated Caps (451MR RoHS ratings below 375mA and 453 RoHS Series )Product MarkingBrand, Ampere RatingOperating Temperature 55 C to 125 CMoisture Sensitivity LevelLevel 1, J-STD-020 SolderabilityMIL-STD-202, Method 208 Insulation Resistance (after Opening)MIL-STD-202, Method 302, Test Condition A (10,000 ohms minimum)Thermal ShockMIL-STD-202, Method 107, Test Condition B, 5 cycles, -65 C / +125 C, 15 minutes @ each extremeMechanical ShockMIL-STD-202, Method 213, Test I.

6 Deenergized. 100G s pk amplitude, sawtooth wave 6ms duration, 3 cycles XYZ+xyz = 18 shocksVibrationMIL-STD-202, Method 201: amplitude, 10-55 Hz in 1 min. 2hrs each XYZ=6hrsMoisture ResistanceMIL-STD-202, Method 106, 10 cyclesSalt SprayMIL-STD-202, Method 101, Test Condition B (48hrs)Resistance to Soldering HeatMIL-STD-202, Method 210, Test condition B (10 sec at 260 C)Product CharacteristicsDimensionsPackagingPart Numbering (.270") (.124") (.116") (.077") .25(.106") .25(.106") (.057") .20(.240")Recommended pad layoutF7 APackaging OptionPackaging SpecificationQuantityQuantity & Packaging Code12mm Tape and ReelEIA RS-481-2 (IEC 286, part 3)5000NR12mm Tape and ReelEIA RS-481-2 (IEC 286, part 3)1000MR0451 001.

7 M R LSeriesAmp CodeQuantity codePackaging codeRefer to Electrical characteristics tableM = 1000 pcsN = 5000 pcsR = Tape and ReelL-RoHS Compliant & Halogen Free (Gold Plated Caps)451 = Gold / Sn-dipped Silver Plated Caps453 = Silver Plated CapsNote: L suffix applies to 451 Series only- 453 Series is available only as RoHS compliant version and does not require L suffix. Please do not include L suffix within 453 Series ordering Compliant & Halogen Free (Sn-dipped Caps)Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage)

8 Other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse .

9 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