Transient Voltage Suppression Diodes SMTO-218 - 6KA > LTKAK6 series LTKAK6 Series RoHS Pb e3 Description The LTKAK6 series offer superior clamping characteristics over standard SAD 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. They can also be connected in series and/or parallel to create various capability and flexible protection solutions. LTKAK6 in SMTO-218 package provide the enhanced quality, easy manufacturing and compact mechanical design than current AK TVS families. Agency Approvals AGENCY AGENCY FILE NUMBER Features E128662 Maximum Ratings and Thermal Characteristics (TA=25OC unless otherwise noted) Parameter Symbol Value Unit Operating Junction and Storage Temperature Range TJ , TSTG (-)40 to 125 °C IPP 6 kA Current Rating1 Note: 1. Rated min IPP measured with 8/20μs pulse. Functional Diagram • Low clamping and slope resistance. • Sharp breakdown voltage. • Halogen free and RoHS compliant • 2nd level interconnect is Pb-free (IPC/JEDEC J-STD-609A.01) • Patent pending package design • Plastic package has underwriters laboratory flammability classification V-O • Compact design having the Hi Power TVS in surface mount package • Bi-directional • Foldbak Technology for superior clamping factor • Option for pack in tube or tape and reel. • Ideal for automatic pick and place assembly and reflow process to reduce the manufacturing cost and increase the soldering quality compared to axial leads package Bi-direcctional Electrical Characteristics (T =25°C unless otherwise noted) A Part Numbers LTKAK6-058C LTKAK6-066C LTKAK6-076C Standoff Voltage (VSO) (V) Max. Reverse Leakage (IR) @VSO (µA) 58 66 76 10 10 10 Reverse Test Breakdown Voltage Current (VBR) @ IT IT Max. Max. Temp Coefficient Capacitance 0 Bias 10kHz of VBR Max. Clamping Voltage VCL @ Peak Pulse Current (IPP) Min Volts Max Volts (mA) VCL Volts 64 72 85 70 80 95 10 10 10 110 120 140 IPP (8/20μS) (A) min typ 6,000 6,000 6,000 9,500 IPP (10/350μS) (A) min typ 1,000 600 1,100 - (%/OC) (nF) 0.1 0.1 0.1 6.5 5.5 4.5 Note: Using 8/20µS wave shaped defined in IEC 61000-4-5. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/10/2015 Transient Voltage Suppression Diodes SMTO-218 - 6KA > LTKAK6 series - Temperature Min (Ts(min)) 150°C - Temperature Max (Ts(max)) 200°C - Time (min to max) (ts) 60 – 180 secs Average ramp up rate (Liquidus Temp (TA) to peak Reflow Ramp-up TL 3°C/second max TS(max) to TA - Ramp-up Rate tp TP Critical Zone TL to TP tL Ts(max) Ramp-down Ts(min) ts Preheat 3°C/second max 25˚C - Temperature (TA) (Liquidus) 217°C - Time (min to max) (ts) 60 – 150 seconds t 25˚C to Peak Time (t) Peak Temperature (TP) 260+0/-5 °C Time within 5°C of actual peak Temperature (tp) 20 – 40 seconds Flow/Wave Soldering (Solder Dipping) Ramp-down Rate 6°C/second max Peak Temperature : 265OC Time 25°C to peak Temperature (TP) 8 minutes Max. Dipping Time : 10 seconds Do not exceed 260°C Soldering : 1 time Physical Specifications Part Numbering System LTK AK6 XXXX X Weight Contact manufacturer Case Epoxy encapsulated Terminal Tin plated lead, solderable per MIL-STD-202 Method 208 OPTION CODE: BLANK Reel Tape -TP Tube Pack Series Type Stand Off Voltage (Please Refer to Electrical Characteristics Chart) Ratings and Characteristic Curves (T =25°C unless otherwise noted) A Peak Power Derating Part Marking System Percent of Rated Value Marking Code 100 LTKAK6 -076C 80 LF 60 40 Littelfuse Logo 20 0 0 25 50 75 100 TJ - Initial Junction Temperature (ºC) © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/10/2015 125 YMTXX Trace Code Marking Y: Year Code M: Month Code T: Manufacture Code XX: Sequential Lot Number AK10 Series Pre Heat Lead–free assembly Temperature (T) Reflow Condition LTKAK10 Series Soldering Parameters Transient Voltage Suppression Diodes SMTO-218 - 6KA > LTKAK6 series Dimensions — SMTO-218 B J Inches Dimension A C A B C D E F G H J F E G H 4° Millimeters Min Max Min Max 0.621 0.529 0.544 0.273 0.702 0.567 0.074 0.193 0.028 0.655 0.594 0.561 0.285 0.737 0.581 0.104 0.222 0.033 15.78 13.43 13.83 6.94 17.82 14.40 1.88 4.89 0.72 16.63 15.09 14.24 7.24 18.72 14.76 2.64 5.65 0.85 D 0.540 0.100 0.425 0.530 0.191 0.053 0.210 Pad Layout Packaging 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 © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 12/10/2015