TVS Diodes Axial Leaded - 20kA > AK20-Y Series RoHS Pb e4 AK20-Y Series Descriptions The AK20-Y series of high power TVS diode is specially designed for meeting severe surge test environment of both AC and DC line protection applications. It features a very fast response and ultra low clamping characteristics as compared to MOVs (Metal Oxide Varistors). It TM accomplishes this by virtue of the Littelfuse Foldback technology,which provides a clamping voltage lower than the avalanche voltage (but above the rated working voltage) therefore, any voltage rise due to increased current conduction is maintained at a minimum magnitude, providing the best possible protection level. These AK components can be connected in series and / or parallel to create a very high surge current protection solution. Agency Recognitions Features No wear-out nor degrade IEC 61000-4-2 ESD 15 kV Agency Agency File Number surge rating over multiple (air), 8 kV (contact) rating E128662 transient events as long Lightning , 20 kA (8/20 as as within surge capability defined in IEC 61000-4-5 nd Ultra high power rating 2 Edition) Very low clamping voltage EFT protection of data Maximum Ratings and Thermal Characteristics lines in accordance with Both reflow and wave O (T =25 C unless otherwise noted) A IEC 61000-4-4 soldering capable UL Recognized Ultra compact: less Parameter Symbol Value Unit compound meeting than one-tenth the size Operating Storage Temperature Range T -55 to 150 C ammabilitfl y rating V-0 STG of traditional discrete Operating Junction Temperature Range T -55 to 125 C solutions Halogen-free and RoHS J 1 compliant Current Rating I 20 kA Sharp breakdo wn voltage PP Glass passivated junction Note: Low slope resistance nd 1. Rated I measured with 8/20s pulse as defined in IEC 61000-4-5 2 edition. nd PP Pb-free E4 means 2 level Bi-directional interconnect is Pb-free Foldback technology for and the terminal finish superior clamping factor Functional Diagram material is silver (IPC/ Symmetric lead width JEDEC J-STD-609A.01) for easy soldering during assembly Bi-directional Electrical Characteristics (T =25C unless otherwise noted) A Reverse Max. Test Max. Temp Breakdown Max. Clamping Voltage Capacitance Max. Current Coefficient Standoff Typical Voltage (V ) V Peak Pulse Current (I ) 0V Bias Reverse BR CL PP I of V Part Part Voltage I T BR R I 10kHz Leakage T O Numbers Marking (V ) 85 C SO (I ) V R SO V I V I Volts (A) CL PP CL PP Min Max (A) O (mA) (8/20s) (8/20s) (10/350s) (10/350s) (%/ C) (nF) Volts Volts Volts Amps Volts Amps AK20-016C-Y 20-016C 16 5 15 17.5 19.3 10 30 20,000 28 3,200 0.1 50 AK20-058C-Y 20-058C 58 5 15 64.0 70.0 10 120 20,000 107 3,200 0.1 15 AK20-063C-Y 20-063C 63 5 15 68.0 75.0 10 125 20,000 110 3,200 0.1 12 AK20-066C-Y 20-066C 66 5 15 72.0 80.0 10 130 20,000 120 3,200 0.1 12 AK20-076C-Y 20-076C 76 5 15 85.0 95.0 10 160 20,000 145 3,200 0.1 12 nd Note: using 8/20 waveshape as defined in IEC 61000-4-5 2 edition 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revision: JC.12/28/20TVS Diodes Axial Leaded - 20kA > AK20-Y Series Soldering Parameters Reflow Condition Leadfree assembly t p T P - Temperature Min (T ) 150C s(min) Ramp-up Critical Zone Pre Heat - Temperature Max (T ) 200C s(max) T to T L P T L t L - Time (min to max) (t ) 60 120 secs s T s(max) Average ramp up rate (Liquidus Temp (T ) to peak 3C/second max L T to T - Ramp-up Rate 3C/second max Ramp-down S(max) L T s(min) t - Temperature (T ) (Liquidus) 217C s L Preheat Reflow - Time (min to max) (t ) 60 150 seconds s +0/-5 Peak Temperature (T ) 260 C 25C P t 25C to Peak Time within 5C of actual peak Temperature (t ) 30 seconds max Time (t) p Ramp-down Rate 6C/second max Physical Specifications Time 25C to peak Temperature (T ) 8 minutes max. P Do not exceed 260C Weight Contact manufacturer UL Recognized epoxy meeting flammability Case rating V-0 Silver plated leads, solderable per Terminal MIL-STD-750 Method 2026 Flow Soldering (Solder Dipping) Wave soldering condition Pb - Free assembly t P - Temperature Min 140C T P Pre Heat - Temperature Max 160C Ramp-up Time to Pre-Heat Temp 60-150 seconds Average ramp up rate to Pre-Heat Temp 5C/second max Peak Temperature 260+0/-5 C T S Average ramp up rate (Tpre-heat to Tp) 5C/second max Ramp Down Pre-heatPre-heat Time within actual peak Temperature Max 6 seconds Ramp-down Rate 5C/second max time to peak temperature Time (t) Ratings and Characteristic Curves (T =25C unless otherwise noted) A Figure 1- Peak Power Derating Figure 2 - Typical V Vs Junction Temperature BR 12 10 100 8 6 80 4 60 2 0 40 -2 -4 20 -6 -8 0 -50 -250 25 50 75 100 125 0255075 100 125 Junction Temperature(T ) j T - Initial Junction Temperature (C) J 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revision: JC.12/28/20 Percent of Rated Value Temperature (T) Percent of V Change BR Temperature