Surface Mount Fuses - Littelfuse

1 2019 Littelfuse , are subject to change without : 11/21/19 Surface Mount FusesNANO2 > Slo-Blo Fuse > 452/454 Series452/454 Series FuseDescriptionThe NANO2 Slo-Blo fuse has enhanced inrush withstand characteristics over the NANO2 Fast-Acting fuse. The unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast-acting fuse to Small size Wide range of current rating available ( to 12A) Wide operating temperature range RoHS compliant and Halogen Free UL Recognized to UL/CSA/NMX UL 248-1 and UL/CSA/NMX UL 248-14 Conforms to DENAN s Appendix 3 RoHSElectrical Characteristics for Series% of Ampere RatingOpening Time10 0%4 hours, Minimum200%1 sec.

2 , Min.; 60 sec., sec., Min.; 3 sec., Max800% sec., Min.; sec., Specifications by ItemAmpere Rating(A)Amp CodeMaxVoltage Rating (V)InterruptingRatingNominal Cold Resistance (Ohms)Nominal Melting I2t (A2sec)Agency @ 125 VAC/VDC300A @ 32 VDCPSE: 100A @ 100 0 00 0 @ 72 VAC50A @ 60 VDC100A @ 75 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 equipmentAgency ApprovalsAgencyAgency File NumberAmpere - - 12 APSENBK030205-E10480B 1A - 5 ANotes: - l2t calculated at 8ms.

3 - Resistance is measured at 10% of rated current, 25 CSpecifications are subject to change without notice. Application testing is strongly recommended. 2019 Littelfuse , are subject to change without : 11/21/19 Surface Mount FusesNANO2 > Slo-Blo Fuse > 452/454 SeriesAverage Time Current 1 10 100 1 10 100 1000 TIME IN SECONDS CURRENT IN AMPS 375mA 500mA 750mA Reflow 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))

4 260+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 CWave Soldering Parameters260 C Peak Temperature, 3 seconds ParametersTemperature Re-rating CurveNote:1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous (max)TS(min)25tPtLtStime to peak temperature(t 25 C to peak)Ramp-downRamp-upPreheatCritical ZoneTL to TP 2019 Littelfuse , are subject to change without : 11/21/19 Surface Mount FusesNANO2 > Slo-Blo Fuse > 452/454 SeriesMaterialsBody: CeramicTerminations.

5 Gold-plated Caps / Sn-dipped Silver Plated Caps (452 Series)Silver-plated Caps (454 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: 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.

6 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 Characteristics1 (.270") (.124") (.116") (.077") .25(.106") .25(.106") (.057") .20(.240")Recommended pad layoutFDimensionsPackagingPart Numbering SystemPackaging OptionPackaging SpecificationQuantityQuantity & Packaging Code12mm Tape and ReelEIA RS-481-1 (IEC 286, part 3)5000NR12mm Tape and ReelEIA RS-481-1 (IEC 286, part 3)1000MR0452 001.

7 M R LSeriesAmp CodeQuantity codePackaging codeM = 1000 pcsN = 5000 pcsR = Tape and ReelL - RoHS Compliant & Halogen Free(Gold Plated Caps)Refer to Amp Code column in the Electrical Specifications table. The dot is positioned at the end of the number sequence with whole ratings and within for fractional : Amp product is (1 amp product shown)Notes:452 series may be ordered as RoHS and HF (Gold Plated Caps) ( L suffix). 454 series is available only as RoHS and HF version and does not require L do not include L suffix within 454 series ordering Compliant & Halogen Free (Sn-dipped Caps)

8 452 Series454 Series452 Series454 Series452 Series454 SeriesDisclaimer 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) other than those expressly set forth in applicable Littelfuse product documentation.

9 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 . 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.

10 Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at InformationDatasheetSamplesResourcesData sheetSamplesResources