457 LITTELFUSE
Document overview
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Technical content
WebSite Europe Tel: +49 2302 662-107 Americas Tel: +1 404 699-7820 Asia Tel: +852 26 14-1108 China Tel: +86 21 6432 5146 1,65 2,8 –0,1 1,65 10 -0,5 cURus Type (I) 100% x I 250% x I SSSSSURFACEURFACEURFACEURFACEURFACE M M M M M OUNTOUNTOUNTOUNTOUNT T T T T T ELECOMELECOMELECOMELECOMELECOM P P P P P ROTECTORSROTECTORSROTECTORSROTECTORSROTECTORS Dimensions (mm)Dimensions (mm)Dimensions (mm)Dimensions (mm)Dimensions (mm) Operating ConditionsOperating ConditionsOperating ConditionsOperating ConditionsOperating Conditions InformationInformationInformationInformationInformation Number Number Number Number Number 457 TTTTTelecom Telecom Telecom Telecom Telecom T ube Protectorube Protectorube Protectorube Protectorube Protector Overcurrent Protection for TOvercurrent Protection for TOvercurrent Protection for TOvercurrent Protection for TOvercurrent Protection for Telecom Equipmentelecom Equipmentelecom Equipmentelecom Equipmentelecom Equipment TTTTTime-Current Characteristicime-Current Characteristicime-Current Characteristicime-Current Characteristicime-Current Characteristic Transient Tolerant Applicable StandardsApplicable StandardsApplicable StandardsApplicable StandardsApplicable Standards UL-248-14 UL 60950 3rd Edition * Telcordia GR-1089 * FCC 47 CFR Part 68 ApprovalsApprovalsApprovalsApprovalsApprovals cULus Recognized FeaturesFeaturesFeaturesFeaturesFeatures Surge proof for telecom line applications No need for series resistors (1.25A & 2.00A) Reduced PCB space requirements Lead-free construction Flame resistant ceramic housing Irreversible physical separation under fault Highly defined cut-off times Low internal resistance minimizes line losses For Reflow Soldering or Soldering Iron WWWWWebLinksebLinksebLinksebLinksebLinks Further info see:Further info see:Further info see:Further info see:Further info see: www.wickmanngroup.com Further application info see fuseology:Further application info see fuseology:Further application info see fuseology:Further application info see fuseology:Further application info see fuseology: www.wickmanngroup.com/download/ fuseology.pdf Pad LayoutPad LayoutPad LayoutPad LayoutPad Layout Chip Size 10030 SpecificationsSpecificationsSpecificationsSpecificationsSpecifications PackagingPackagingPackagingPackagingPackaging 000: 2500 pcs./330mm reel (Blister Tape) 001: 500 pcs./178mm reel (Blister Tape) Tape width 16mm MaterialsMaterialsMaterialsMaterialsMaterials Housing: Ceramic tube Element: Wire Terminals: Copper, nickel & silver plated Operating TOperating TOperating TOperating TOperating T emperatureemperatureemperatureemperatureemperature -40 ºC to +125 ºC (consider de-rating) Climatic TClimatic TClimatic TClimatic TClimatic T estestestestest Damp heat, steady state Stock ConditionsStock ConditionsStock ConditionsStock ConditionsStock Conditions +10 ºC to +60 ºC relative humidity ≤ 75 % yearly average, without dew, maximum value for 30 days - 95 % Recommended solderingRecommended solderingRecommended solderingRecommended solderingRecommended soldering 240 ºC, 30 s (Reflow) SolderabilitySolderabilitySolderabilitySolderabilitySolderability acc. to IEC 60068-2-58 235 °C, 2 s Soldering Heat ResistanceSoldering Heat ResistanceSoldering Heat ResistanceSoldering Heat ResistanceSoldering Heat Resistance 260 ºC, 10 s (IEC 60068-2-58) 280 ºC, 5 s (IEC 60068-2-58) Minimum Cross Section, CopperMinimum Cross Section, CopperMinimum Cross Section, CopperMinimum Cross Section, CopperMinimum Cross Section, Copper Conducting path - 0.175 mm 2 Path thickness - 0.035 mm MountingMountingMountingMountingMounting Avoid circuit traces below the Fuse. Fuse should not be enclosed in potting materials. MarkingMarkingMarkingMarkingMarking Logo, Current Rating Unit WeightUnit WeightUnit WeightUnit WeightUnit Weight 0.25 g (approx.) Lightning Surge SpecificationsLightning Surge SpecificationsLightning Surge SpecificationsLightning Surge SpecificationsLightning Surge Specifications Specifications are subject to change without notice Electrical SpecificationsElectrical SpecificationsElectrical SpecificationsElectrical SpecificationsElectrical Specifications Surge Specification Surge Repetitions Waveform ( µsec.) Current (A) Voltage (V) Performance Requirement FCC 47 Part 68 Logitudinal Type A 2 10x160 70A 1500 Fuse cannot open FCC 47 Part 68 Metallic Type A 2 10x560 45A 800 Fuse cannot open Telcordia GR-1089-CORE First Level Lightning 50 10x1000 30A 1000 Fuse cannot open FCC 47 Part 68 Longitudinal Type A 2 10x160 160 1500 Fuse cannot open FCC 47 Part 68 Metallic Type A 2 10x560 115 800 Fuse cannot open Telcordia GR-1089-CORE First Level Lightning 50 10x1000 100 1.000 Fuse cannot open Telcordia GR-1089-CORE First Level Lighting 50 2x10 500 2.500 Fuse cannot open 0500 tested0500 tested0500 tested0500 tested0500 tested 1250 and 1251 tested1250 and 1251 tested1250 and 1251 tested1250 and 1251 tested1250 and 1251 tested Type Code Current Voltage Rating Interrupting Rating Voltage Drop Cold Resistance Melting Integral Approvals AC 250VAC 600VAC 1.0 x IN 0.1 x IN 10 x IN 50/60 Hz cos ϕ=1 max. (mV) max. (m Ω) typ. (A 2s) 0500 500mA 250V 50A 60A 450 640 2 • 1250 1.25A 250V 50A 60A 250 150 16 • 1251 2.00A 250V 50A 60A 375 115 18 • UL 60950 3rd Edition * Telcordia1089 (2nd Level) * Type Test M1 Test M2 Test M3 Test M3 Test 1 Test 2 Test 3 Test 4 Code 600V/1.5s 600V/5s 600V/30min Max. ∆∆∆∆∆ T ( ºC) 277V/15min 600V/5s 600V/5s 600V/15min 0500 40A 7A 2.2A -- 25A 60A 7A 2.2A 1250 40A 7A 2.2A 120 25A 60A 7A 2.2A 1251 40A 7A 2.2A 50 25A 60A 7A 2.2A This product is not recommended for new designs. Please refer to Littelfuse No. 461.
WebSite Europe Tel: +49 2302 662-107 Americas Tel: +1 404 699-7820 Asia Tel: +852 26 14-1108 China Tel: +86 21 6432 5146 52 52 52 51 10 100 1000 0.001 0.01 0.1 100 1,000 10,000 100,000 I-t Characteristics BC Subject to change without notice. To ensure compliance with respective telecom standards, the 457 shall be tested in the actual application. 0.5 A 457-0500 457-1251 457-1250 SSSSSURFACEURFACEURFACEURFACEURFACE M M M M M OUNTOUNTOUNTOUNTOUNT T T T T T ELECOMELECOMELECOMELECOMELECOM P P P P P ROTECTORSROTECTORSROTECTORSROTECTORSROTECTORS TTP / No. 457457457457457 IIIIIFaultFaultFaultFaultFault (Amps) (Amps) (Amps) (Amps) (Amps)