TransGuard. AVX Multilayer Ceramic Transient Voltage Suppressors GENERAL DESCRIPTION TRANSGUARD DESCRIPTION

Transcription

1 GENERAL DESCRIPTION The AVX TransGuard Transient Voltage Suppressors (TVS) with unique high-energy multilayer construction represents state-of-the-art overvoltage circuit protection. Monolithic multilayer construction provides protection from voltage transients caused by ESD, lightning, NEMP, inductive switching, etc. True surface mount product is provided in EIA industry standard packages. Thru-hole components are supplied as conformally coated axial devices. TRANSGUARD DESCRIPTION TransGuard products are zinc oxide (ZnO) based ceramic semiconductor devices with non-linear voltage-current characteristics (bi-directional) similar to back-to-back zener diodes. They have the added advantage of greater current and energy handling capabilities as well as EMI/RFI attenuation. Devices are fabricated by a ceramic sintering process that yields a structure of conductive ZnO grains surrounded by electrically insulating barriers, creating varistor-like behavior. The number of grain-boundary interfaces between conducting electrodes determines Breakdown Voltage of the device. High voltage applications such as AC line protection require many grains between electrodes while low voltage requires few grains to establish the appropriate breakdown voltage. Single layer ceramic disc processing proved to be a viable production method for thick cross section devices with many grains, but attempts to address low voltage suppression needs by processing single layer ceramic disc formulations with huge grain sites has had limited success. AVX, the world leader in the manufacture of multilayer ceramic capacitors, now offers the low voltage transient protection marketplace a true multilayer, monolithic surface mount varistor. Technology leadership in processing thin dielectric materials and patented processes for precise ceramic grain growth have yielded superior energy dissipation in the smallest size. Now a varistor has voltage characteristics determined by design and not just cell sorting whatever falls out of the process. Multilayer ceramic varistors are manufactured by mixing ceramic powder in an organic binder (slurry) and casting it into thin layers of precision thickness. Metal electrodes are deposited onto the green ceramic layers which are then stacked to form a laminated structure. The metal electrodes are arranged so that their terminations alternate from one end of the varistor to the other. The device becomes a monolithic block during the sintering (firing) cycle providing uniform energy dissipation in a small volume. 1

2 Surface Mount Devices Important: For part number identification only, not for construction of part numbers. The information below only defines the numerical value of part number digits, and cannot be used to construct a desired set of electrical limits. Please refer to the TransGuard part number data for the correct electrical ratings. V C D 15 R P TERMINATION FINISH: P = Ni/Sn Alloy (Plated) M = Ni/Sn Pb (Plated) PACKAGING (Pcs/Reel): STYLE D R T W VC42 N/A N/A N/A 1, VC63 1, 4, 1, N/A VC85 1, 4, 1, N/A VC126 1, 4, 1, N/A VC121 1, 2, 1, N/A CLAMPING VOLTAGE: Where: 1 = 12V 5 = 5V 15 = 18V 56 = 6V 2 = 22V 58 = 6V 25 = 27V 62 = 67V 3 = 32V 65 = 67V 39 = 42V 11 = 1V 4 = 42V 121 = 12V ENERGY: Where: A =.1J J = 1.5J S = J B =.2J K =.6J T =.1J C =.3J L =.8J U = 4.-5.J D =.4J M = 1.J V =.2J E =.5J N = 1.1J W = 6.J F =.7J P = 3.J X =.5J G =.9J Q = 1.3J Y = 12.J H = 1.2J R = 1.7J Z = 25.J WORKING VOLTAGE: Where: 3 = 3.3 VDC 18 = 18. VDC 5 = 5.6 VDC 26 = 26. VDC 9 = 9. VDC 3 = 3. VDC 12 = 12. VDC 48 = 48. VDC 14 = 14. VDC 6 = 6. VDC CASE SIZE DESIGNATOR: SIZE LENGTH WIDTH 42 1.±.1mm (.4"±.4").5±.1mm (.2"±.4") ±.15mm (.63"±.6").8±.15mm (.32"±.6") ±.2mm (.79"±.8") 1.25±.2mm (.49"±.8") ±.2mm (.126"±.8") 1.6±.2mm (.63"±.8") ±.2mm (.126"±.8") 2.49±.2mm (.98"±.8") CASE STYLE: C = Chip PRODUCT DESIGNATOR: V = Varistor MARKING: All standard surface mount TransGuard chips will not be marked. PART NUMBER IDENTIFICATION Axial Leaded Devices Important: For part number identification only, not for construction of part numbers. The information below only defines the numerical value of part number digits, and cannot be used to construct a desired set of electrical limits. Please refer to the TransGuard part number data for the correct electrical ratings. V A 1 5 D 15 R L LEAD FINISH: Copper clad steel, solder coated PACKAGING (Pcs/Reel): STYLE D R T VA1 1, 3, 7,5 VA2 1, 2,5 5, CLAMPING VOLTAGE: Where: 1 = 12V 58 = 6V 15 = 18V 65 = 67V 3 = 32V 11 = 1V 4 = 42V 121 = 12V ENERGY: Where: A =.1J D =.4J K = 2.J WORKING VOLTAGE: Where: 3 = 3.3 VDC 26 = 26. VDC 5 = 5.6 VDC 3 = 3. VDC 14 = 14. VDC 48 = 48. VDC 18 = 18. VDC 6 = 6. VDC CASE SIZE DESIGNATOR: SIZE LENGTH DIAMETER mm (.17") 2.54mm (.1") mm (.19") 3.56mm (.14") CASE STYLE: A = Axial PRODUCT DESIGNATOR: V = Varistor MARKING: All axial TransGuards are marked with vendor identification, product identification, voltage/energy rating code and date code (see example below): Where: AVX TVS 5D 825 AVX = Always AVX (Vendor Identification) TVS = Always TVS (Product Identification - Transient Voltage Suppressor) 5D = Working VDC and Energy Rating (Joules) Where: 5 = 5.6 VDC, D =.4J 725 = Three Digit Date Code Where: 8 = Last digit of year (28) 25 = Week of year 2

3 ELECTRICAL CHARACTERISTICS AVX Working Working Breakdown Clamping Test Maximum Transient Peak Typical Frequency Case Part Number Voltage Voltage Voltage Voltage Current Leakage Energy Current Cap Size (DC) (AC) For VC Current Rating Rating VC633A ±2% K 63 VC853A ±2% K 85 VC853C ±2% K 85 VC1263A ±2% K 126 VC1263D ±2% K 126 VA13A ±2% K 1 VA13D ±2% K 1 VC425X ±2% M 42 VC635A ±2% K 63 VC855A ±2% K 85 VC855C ±2% K 85 VC1265A ±2% K 126 VC1265D ±2% K 126 VA15A ±2% K 1 VA15D ±2% K 1 VC429X ±15% M 42 VC639A ±15% K 63 VC859A ±15% K 85 VC8512A ±15% K 85 VC4214X ±12% M 42 VC6314A ±12% K 63 VC8514A ±12% K 85 VC8514C ±12% K 85 VC12614A ±12% K 126 VC12614D ±12% K 126 VA114A ±12% K 1 VA114D ±12% K 1 VC13MA16KBA ±1% K 121 VC4218X ±1% M 42 VC6318A ±1% K 63 VC8518A ±1% K 85 VC8518C ±1% K 85 VC1 2618A ±1% K 126 VC12618D ±1% K 126 VC12618E ±1% K 126 VC12118J ±1% K 121 VJ13MC18KBA ±1% K 121 VA118A ±1% K 1 Termination/Lead Finish Code Packaging Code 3

4 ELECTRICAL CHARACTERISTICS AVX Working Working Breakdown Clamping Test Maximum Transient Peak Typical Frequency Case Part Number Voltage Voltage Voltage Voltage Current Leakage Energy Current Cap Size (DC) (AC) For VC Current Rating Rating VA118D ±1% K 1 VC6326A ±1% K 63 VC8526A ±1% K 85 VC8526C ±1% K 85 VC12626D ±1% K 126 VC12626F ±1% K 126 VC12126H ±1% K 121 VJ13MC26KBA ±1% K 121 VC181226P ±1% K 1812 VA126D ±1% K 1 VC633A ±1% K 63 VC853A ±1% M 85 VC1263D ±1% K 126 VC1213G ±1% K 121 VC1213H ±1% K 121 VJ13MC3KBA ±1% K 121 VJ13PC3KBA ±1% K 121 VA13D ±1% K 1 VC12631M ±1% K 126 VC12638N ±1% K 126 VC12138S ±1% K 121 VC181238U ±1% K 1812 VC12645K ±1% K 126 VC181245U ±1% K 1812 VC12648D ±1% K 126 VC12148G ±1% K 121 VC12148H ±1% K 121 VJ13MC48KBA ±1% K 121 VJ13PC48KBA ±1% K 121 VA148D ±1% K 1 VC12656F ±1% K 126 VC181256U ±1% K 1812 VC1216J ±1% K 121 VJ13MC6KBA ±1% K 121 VA26K ±1% K 2 VC12665L ±1% K 126 Termination/Lead Finish Code Packaging Code V W (DC) DC Working Voltage (V) V W (AC) AC Working Voltage (V) V B Typical Breakdown Voltage 1mA DC ) V B Tol V B Tolerance is ± from Typical Value V C Clamping Voltage I VC ) I VC I L E T I P Test Current for V C (A, 8x2µS) Maximum Leakage Current at the Working Voltage (µa) Transient Energy Rating (J, 1x1µS) Peak Current Rating (A, 8x2µS) Typical Capacitance frequency specified and.5 V RMS Frequency at which capacitance is measured (K = 1kHz, M = 1MHz) Cap Freq 4

5 Dimensions Dimensions: Millimeters (Inches) D Max..51 ±.5 (.2" ±.2") L Max (1.") Min. Lead Length DIMENSIONS: mm (inches) (L) Max Length AVX Style VA1 VA2 (D) Max Diameter Lead Finish: Copper Clad Steel, Solder Coated mm (in.) (.17) (.19) mm (in.) (.1) (.14) L W T t DIMENSIONS: mm (inches) (L) Length (W) Width AVX Style (T) Max Thickness (t) Land Length mm 1.±.1 1.6± ±.2 3.2±.2 3.2±.2 4.5±.2 5.7±.2 (in.) (.4±.4) (.63±.6) (.79±.8) (.126±.8) (.126±.8) (.177±.8) (.224±.8) mm.5±.1.8± ±.2 1.6± ±.2 3.2±.2 5.±.2 (in.) (.2±.4) (.31±.6) (.49±.8) (.63±.8) (.98±.8) (.126±.8) (.197±.8) mm (in.) (.24) (.35) (.4) (.4) (.67) (.67) (.67) mm.25±.15.35± max..71 max..71 max..5±.25.5±.25 (in.) (.1±.6) (.14±.6) (.28 max.) (.28 max.) (.28 max.) (.2±.1) (.2±.1) 5

6 TYPICAL PERFORMANCE CURVES (42 CHIP SIZE) VOLTAGE/CURRENT CHARACTERISTICS Multilayer construction and improved grain structure result in excellent transient clamping characteristics up to 2 amps peak current, while maintaining very low leakage currents under DC operating conditions. The VI curves below show the voltage/current characteristics for the 5.6V, 9V, 14V, 18V and low capacitance StaticGuard parts with currents ranging from parts of a micro amp to tens of amps. Voltage (V) VC4LC18V5 VC4218X4 VC4214X3 VC429X2 VC425X15 PULSE DEGRADATION Traditionally varistors have suffered degradation of electrical performance with repeated high current pulses resulting in decreased breakdown voltage and increased leakage current. It has been suggested that irregular intergranular boundaries and bulk material result in restricted current paths and other non-schottky barrier paralleled conduction paths in the ceramic. Repeated pulsing of TransGuard transient voltage suppressors with 15Amp peak 8 x 2µS waveforms shows negligible degradation in breakdown voltage and minimal increases in leakage current. This does not mean that TransGuard suppressors do not suffer degradation, but it occurs at much higher current. ESD TEST OF 42 PARTS 35 3 VC4LC18V PEAK POWER VS PULSE DURATION BREAKDOWN VOLTAGE (Vb) VC4218X4 VC4214X3 VC429X2 VC425X15 PEAK POWER (W) VC4218X4 VC4214X3 VC429X2 VC4LC18V5 VC425X kV ESD STRIKES INSERTION LOSS CHARACTERISTICS db VC4LC18V VC4218X -15 VC4214X VC429X VC425X IMPULSE DURATION (μs) Frequency (GHz) 6

7 TYPICAL PERFORMANCE CURVES (63, 85, 126 & 121 CHIP SIZES) VOLTAGE/CURRENT CHARACTERISTICS Multilayer construction and improved grain structure result in excellent transient clamping characteristics up to 5 amps peak current, depending on case size and energy rating, while maintaining very low leakage currents under DC operating conditions. The VI curve below shows the voltage/current characteristics for the 3.3V, 5.6V, 12V, 14V, 18V, 26V, 3V, 48V and 6VDC parts with currents ranging from parts of a micro amp to tens of amps. 25 VI Curves - 3.3V and 5.6V Products 2 Voltage (V) VI Curves - 9V, 12V, and 14V Products V,.1J 3.3V, >.1J 5.6V,.1J 5.6V, >.1J Voltage (V) VI Curves - 18V and 26V Products V,.1J 12V,.1J 14V,.1J 14V, >.1J Voltage (V) VI Curves - 3V, 48V, and 6V Products V,.1J 18V, >.1J 26V,.1J 26V, >.1J Voltage (V) V,.1J 3V, >.1J 48V 6V 7

8 TYPICAL PERFORMANCE CURVES (63, 85, 126 & 121 CHIP SIZES) 3.3V 8

9 TYPICAL PERFORMANCE CURVES (63, 85, 126 & 121 CHIP SIZES) TEMPERATURE CHARACTERISTICS TransGuard suppressors are designed to operate over the full temperature range from -55 C to +125 C. This operating temperature range is for both surface mount and axial leaded products. Voltage as a Percent of Average Breakdown Voltage Temperature Dependence of Voltage C 25 C 85 C 125 C Energy Derating TYPICAL ENERGY DERATING VS TEMPERATURE.2 Typical Breakdown (V B ) and Clamping (V C ) Voltages TYPICAL BREAKDOWN AND CLAMPING VOLTAGES VS TEMPERATURE - 5.6V 5.6V o Temperature ( C) VC V B Temperature ( oc) Typical Breakdown (V B ) and Clamping (V C ) Voltages Typical Breakdown (V B ) and Clamping (V C ) Voltages TYPICAL BREAKDOWN AND CLAMPING VOLTAGES VS TEMPERATURE - 18V 18V ( VC ) ( V B ) o Temperature ( C) TYPICAL BREAKDOWN AND CLAMPING VOLTAGES VS TEMPERATURE - 26V 26V ( VC ) ( V B ) Temperature ( C) Capacitance Relative to 25 C TYPICAL CAPACITANCE VS TEMPERATURE 25 C Reference Average Temperature ( C) 9

10 TYPICAL PERFORMANCE CURVES (63, 85, 126 & 121 CHIP SIZES) PULSE DEGRADATION Traditionally varistors have suffered degradation of electrical performance with repeated high current pulses resulting in decreased breakdown voltage and increased leakage current. It has been suggested that irregular intergranular boundaries and bulk material result in restricted current paths and other non-schottky barrier paralleled conduction paths in the ceramic. Repeated pulsing of both 5.6 and 14V TransGuard transient voltage suppressors with 15 Amp peak 8 x 2µS waveforms shows negligible degradation in breakdown voltage and minimal increases in leakage current. This does not mean that TransGuard suppressors do not suffer degradation, but it occurs at much higher current. The plots of typical breakdown voltage vs number of 15A pulses are shown below. Change in Breakdown Voltage (%) Change in Breakdown Voltage (%) 1% 8% 6% 4% 2% % Number of Strikes Figure 1 VC12618D4 VC12626D58 VC12614D3 VC1265D15 Repetitive Peak Current Strikes TransGuard 85.1J and.3j Products 15% 1% 5% % Repetitive Peak Current Strikes TransGuard 126.4J Product Number of Strikes Figure 2 VC8518A4 VC8518C4 Change in Breakdown Voltage (%) Change in Breakdown Voltage (%) Repetitive Peak Current Strikes TransGuard J Product 1% 8% 6% 4% 2% % 3% 25% 2% 15% 1% 5% % VC12118J Number of Strikes Figure 3 Repetitive Peak Current Strikes StaticGuard 85.1J Product VC8LC18A Number of Strikes Figure 4 CAPACITANCE/FREQUENCY CHARACTERISTICS TransGuard Capacitance vs Frequency 63 TransGuard Capacitance vs Frequency 85 TransGuard Capacitance vs Frequency Capacitance Change (%) VC635A15 VC6LC18X5 VC6326A Frequency (MHz) Capacitance Change (%) VC855C15 2 VC8518C4 VC8514A Frequency (MHz) Capacitance Change (%) VC12614D3 VC12648D11 VC12LC18A Frequency (MHz) 1