Transient Voltage Suppression Diodes SMTO-218 - 6 kA > LTKAK6 series LTKAK6 Series RoHS Pb e3 Description The LTKAK6 series offers superior clamping characteristics over standard S.A.D. technologies by virtue of the Littelfuse Foldbak 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 contained to a minimum, providing the best possible protection level.This LTKAK6 series can be combined in series or parallel solutions to offer various clamping levels and surge withstand options. The LTKAK6 SMT package provides a more compact PCB layout than typical through-hole AK TVS components. Agency Approvals Features AGENCY AGENCY FILE NUMBER * High Power TVS designed in a surface mount and compact SMTO-218 package * Patent pending package design * Foldbak Technology for superior clamping characteristics * Tube or tape and reel pack options available * Ideal for automatic pick and place assembly and reflow process to reduce the manufacturing cost and increase the soldering quality as E129662 Maximum Ratings and Thermal Characteristics (TA=25OC unless otherwise noted) Parameter Operating Junction Storage Temperature Range Current Rating1 Typical Thermal Resistance Junction to Lead Typical Thermal Resistance Junction to Ambient Symbol Value TJ -55 to 125 Unit TSTG -55 to 150 IPP 6 kA RJL 10 C/W RJL 50 C C/W Note: 1. Rated min IPP measured with 8/20s pulse. compared to axial leaded packages * Low clamping and slope resistance. * Sharp breakdown voltage. * Meet MSL level1, per J-STD-020, LF maximum peak of 260C * Pb-free E3 means 2nd level interconnect is Pb-free and the terminal finish material is tin(Sn) (IPC/JEDEC J-STD-609A.01) * UL Recognized compound meeting flammability rating V-0 Electrical Characteristics (TA=25C unless otherwise noted) Part Numbers Standoff Voltage (VSO) (V) Max. Reverse Leakage (IR) @VSO (A) Reverse Breakdown Voltage (VBR) @ IT Test Current IT Max. Clamping Voltage VC @ (IPP) Max. Temp Coefficient of VBR Max. Capacitance 0V Bias 10kHz (nF) Min Volts Max Volts (mA) Volts (%/OC) LTKAK6-058C 58 10 64 70 10 110 0.1 6.5 LTKAK6-066C 66 10 72 80 10 120 0.1 5.5 LTKAK6-076C 76 10 85 95 10 140 0.1 4.5 Note: Using 8/20 waveshape as defined in IEC 61000-4-5 2 edition. nd Surge Ratings Max Peak Pulse Current (IPP) Part Numbers (80/20S) (A) Min Min Typ Min LTKAK6-058C 6,000 900 1,100 430 LTKAK6-066C 6,000 900 1,100 430 LTKAK6-076C 6,000 900 1,100 430 (10/350S) (A) (c) 2018 Littelfuse, Inc. Revised: 07/26/18 Specifications are subject to change without notice. (10/1000S) (A) littelfuse.com Transient Voltage Suppression Diodes SMTO-218 - 6 kA > LTKAK6 series I-V Curve Characteristics PPPM Peak Pulse Power Dissipation -- I Bi-directional VR IPP Max power dissipation Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation VBR Breakdown Voltage -- IT IR VR VBR Vc Maximum voltage that flows though the TVS at a specified test current (IT) VC Clamping Voltage -- V Peak voltage measured across the TVS at a specified Ippm (peak impulse current) IR Reverse Leakage Current -Current measured at VR Ratings and Characteristic Curves (T =25C unless otherwise noted) A Typical Peak Pulse Power Rating Curve 8/20s 700 600 LTKAK6-076C 500 LTKAK6-066C 400 LTKAK6-058C 300 200 10/350s 100 0 0.00001 0.0001 0.001 td-Pulse Width (sec.) IPP - Peak Pulse Current - %IPP 80 60 40 20 0 0.01 0 25 50 75 125 100 TJ - Initial Junction Temperature (C) Please contact Littelfuse for reliability or FIT/MTBF data , the performance is subject to vary and depends on the end customers' application condition. Pulse Waveform Peak Value 100 100 tr = rise time to peak value td = decay time to half value tr x td =8/20s 50 Half Value 0 0 tr td t - Time (s) (c) 2018 Littelfuse, Inc. Revised: 07/26/18 Specifications are subject to change without notice. littelfuse.com AK10 Series 800 Percent of Rated Value PPPM-Peak Pulse Power (kW) 900 Peak Power Derating Transient Voltage Suppression Diodes SMTO-218 - 6 kA > LTKAK6 series Soldering Parameters Pre Heat Lead-free assembly - Temperature Min (Ts(min)) 150C - Temperature Max (Ts(max)) 200C - Time (min to max) (ts) 60 - 180 secs Average ramp up rate (Liquidus Temp (TA) to peak TS(max) to TA - Ramp-up Rate Reflow 3C/second max tp TP Ramp-up TL Temperature (T) Reflow Condition Critical Zone TL to TP tL Ts(max) Ramp-down Ts(min) ts Preheat 3C/second max - Temperature (TA) (Liquidus) 217C - Time (min to max) (ts) 60 - 150 seconds 25C t 25C to Peak Time (t) Peak Temperature (TP) 260+0/-5 C Time within 5C of actual peak Temperature (tp) 20 - 40 seconds Flow/Wave Soldering (Solder Dipping) Ramp-down Rate 6C/second max Peak Temperature : 265OC Time 25C to peak Temperature (TP) 8 minutes Max. Dipping Time : 10 seconds Do not exceed 260C Soldering : 1 time Physical Specifications Weight Contact manufacturer Case Epoxy encapsulated Terminal Tin plated lead, solderable per MIL-STD-202 Method 208 Part Numbering System LTK AK6 XXXX X OPTION CODE: BLANK Reel Tape -TP Tube Pack Series Type Stand Off Voltage (Please Refer to Electrical Characteristics Chart) Physical Specifications High Temp Storage JESD22-A103 HTRB JESD22-A108 MSL JESDEC-J-STD020, Level 1 H3TRB JESD22-A101 RSH JESD22-B106 Part Marking System Marking Code LTKAK6 -076C LF Littelfuse Logo (c) 2018 Littelfuse, Inc. Revised: 07/26/18 Specifications are subject to change without notice. YMXXX YMTXX Trace Code Marking Y: Year Code M: Month Code T: Manufacture Code XXX XX: Sequential Lot Number littelfuse.com Transient Voltage Suppression Diodes SMTO-218 - 6 kA > LTKAK6 series Dimensions -- SMTO-218 Note: Coplanarity of solder side is controlled within 0.08mm. Dimension A Inches Millimeters Min Max Min Max 0.621 0.655 15.78 16.63 B 0.529 0.594 13.43 15.09 C 0.544 0.561 13.83 14.24 D 0.273 0.285 6.94 7.24 E 0.702 0.737 17.82 18.72 F 0.567 0.587 14.40 14.90 G 0.087 0.126 2.20 3.20 H 0.193 0.222 4.89 5.65 J 0.028 0.033 0.72 0.85 L 0.400 0.440 10.17 11.17 M 0.073 0.112 1.85 2.85 N 0.510 0.533 12.95 13.55 Part Number Weight Packing Mode Base Quantity LTKAK6-xxxC 4.34g Tape & Reel - 32mm/13" tape 400 LTKAK6-xxxC-TP 4.34g Tube Pack 100(25/Tube) 1.5 2.0 4.0 20.0 0.4 14.2 1.75 Tape and Reel Specification 32.0 18.5 Dimensions in millimeters 14.5 7.6 Direction of Feed (c) 2018 Littelfuse, Inc. Revised: 07/26/18 Specifications are subject to change without notice. littelfuse.com AK10 Series Packaging