Varistors(SMD) Countermeasure for Surge and Static Electricity

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Gertrude Casey
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1 (1/1) Varistors(SMD) Countermeasure for Surge and Static Electricity Conformity to RoHS Directive AVR Series AVR-M, AVRL Types Varistor (Variable resistor) is a nonlinear resistive element of the voltage dependence that resistance changes with applied voltage. Varistor is equivalent with Zener diode of two series connection. Therefore, do not have polarity. CURRENT vs. VOLTAGE CHARACTERISTICS EQUIVALENT CIRCUIT Current(A) Positive direction Zener diode /Vz:6.8V Chip varistor /V1mA:12V 2 Zener Diodes A capacitance content Negative direction Voltage(V) THE EFFECT OF THE VARISTOR WITHOUT VARISTOR A malfunction and failure of electronic equipment ESD, Surge voltage WITH VARISTOR Suppress abnormal voltage by inserting varistor in a circuit ESD, Surge voltage Power line Signal line IC Power line Signal line IC Insert a varistor between a line and ground

(2/1) FEATURES No polarity, due to symmetrical current-voltage characteristics. Equivalent to anode common type Zener diode. Excellent electrostatic absorption capability.

2 (2/1) FEATURES No polarity, due to symmetrical current-voltage characteristics. Equivalent to anode common type Zener diode. Excellent electrostatic absorption capability. Response is as good or better than Zener diode. Keeps symmetrical current-voltage characteristics even after electrostatic absorption. Adopted the inner electrodes lamination structure. Wide range of varistor voltages are available in series (8 to 39V). Low capacitance items are available in series (3.3pF to). World s smallest 63-type, 15-, 168-, 212-chip types and 141-array type are available in series. Excellent mount reliability. Good for Pb-free soldering. Adopted (Ni/Sn) electroplating. Achieved good solderability and solder heat resistance. Can replace a Zener diode + capacitor combination. Reduced footprint and total mounting cost. APPLICATIONS Electrostatic absorption Pulse noise absorption TEMPERATURE RANGES Type AVR-M15/168/212 AVR-M14A2/63/AVRL Operating 4 to +125 C 4 to +85 C Storage 4 to +125 C 4 to +85 C INTERNAL STRUCTURE CIRCUITS SINGLE TYPE Inner electrode Varistor body (Palladium) (Zinc Oxide: ZnO semiconductor ceramics) Sn plating Ag termination underlayer Ni plating ARRAY TYPE OPERATIONAL VOLTAGE RANGES 63 type 15 type 168 type 212 type 141 type Circuit voltage(v) RECOMMENDED REFLOW SOLDERING CONDITIONS APPLICATION EXAMPLES Consumer product Application Mobile phone Data terminal Digital video camera LCD panel Digital camera Touch panel PDA Button and switch unit Note PC Battery terminal DVD-ROM, CD-ROM Audio-Video input-output terminal CD/MD/MP3 player Microphone/receiver unit Game machine Controller unit CAN-BUS ECU In-car equipment Connector Air conditioner panel Car audio Car navigation 26 C max. 25 C 22 C 18 C 15 C Preheating 6 to 12s Time(s) 1s max. Soldering 6s max. Natural cooling

(3/1) AVR-M TYPE PRODUCT IDENTIFICATION AVR-M 15 C 27 M T AAB (1) (2) (3) (4) (5) (6) (7) (1) Series name SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PAT- TERN 63/15/168/212 TYPES L (2) Dimensions L W

3 (3/1) AVR-M TYPE PRODUCT IDENTIFICATION AVR-M 15 C 27 M T AAB (1) (2) (3) (4) (5) (6) (7) (1) Series name SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PAT- TERN 63/15/168/212 TYPES L (2) Dimensions L W mm mm mm mm 14A mm (2-element) (3) Structure code (4) Varistor voltage V (5) Varistor voltage tolerance K ±1% M ±2% (6) Packaging style T B Taping Bulk (7) Capacitance and TDK internal code W T Type L W T B min. Weight (mg)typ. 63.6±.3.3±.3.3± ±.5.5±.5.5± ±.1.8±.1.8± ± ±.2 1.± b a B b c Type a b c to.35.2 to.3.25 to to.5.35 to.45.4 to to.8.6 to.8.6 to to to.9.9 to TYPE 1.37±.2.2typ. 1.±.2.36±.2.6max..64typ..32±.2 Weight: 4mg typ. 1. to to to.45.6 to.66.3 to.4

4 (4/1) ELECTRICAL CHARACTERISTICS Part No. : Packaging style(t: Taping/B: Bulk) Varistor voltage (Break voltage) V1mA(V)[DC1mA] Maximum continuous voltage (Rated voltage) Vdc(V) Clamping voltage Vcl(V) [8/2µs] Maximum energy E(Joule) [1/1µs] Maximum peak current Ip(A) [8/2µs] Capacitance C(pF) [1kHz, 1Vrms] 63 type AVRM63C6R8N 11N 6.8 (4.76 to 8.84) 3.5 max. 14[1A].1 max. 1 max. 1 typ. AVRM63C8M 11N 8 (6.4 to 9.6) 5.5 max. 17[1A].1 max. 4 max. 1 typ. AVRM63C12M 11N 12 (9.6 to 14.4) 7.5 max. 2[1A].1 max. 5 max. 1 typ. AVR-M63C12M AAB 12 (9.6 to 14.4) 7.5 max. 23[1A].1 max. 1 max. 33 typ. 15 type AVRM15C6R8N 11N 6.8 (4.76 to 8.84) 3.5 max. 14[1A].2 max. 1 max. 1 typ. AVR-M15C8M AAB 8 (6.4 to 9.6) 5.5 max. 14[1A].4 max. 25 max. 65 typ. AVR-M15C8M ADB 8 (6.4 to 9.6) 5.5 max. 14[1A].4 max. 25 max. 48 typ. AVR-M15C8M ABB 8 (6.4 to 9.6) 5.5 max. 15[1A].2 max. 3 max. 1 typ. AVR-M15C8M ACB 8 (6.4 to 9.6) 5.5 max. 19[1A].1 max. 1 max. 33 typ. AVR-M15C12M AAB 12 (9.6 to 14.4) 7.5 max. 2[1A].5 max. 1 max. 13 typ. AVRM15C27K 11N 27 (21.6 to 32.4) 19 max. 55[1A].6 max. 4 max. 1 typ. AVR-M15C27M AAB 27 (21.6 to 32.4) 15 max. 5[1A].6 max. 4 max. 4 typ. AVR-M15C27M ABB 27 (21.6 to 32.4) 15 max. 5[1A].5 max. 1 max. 15 typ. 168 type AVR-M168C8M AAB 8 (6.4 to 9.6) 5.5 max. 15[2A].9 max. 3 max. 65 typ. AVR-M168C12M 6AB 12 (9.6 to 14.4) 7.5 max. 2[2A].9 max. 5 max. 15 typ. AVR-M168C12M 2AB 12 (9.6 to 14.4) 7.5 max. 2[2A].6 max. 15 max. 4 typ. AVR-M168C18M 6AB 18 (14.4 to 21.6) 11 max. 3[2A].1 max. 3 max. 6 typ. AVR-M168C22K 6AB 22 (19.8 to 24.2) 16 max. 34[2A].1 max. 3 max. 56 typ. AVR-M168C22K 2AB 22 (19.8 to 24.2) 16 max. 37[2A].3 max. 1 max. 21 typ. AVR-M168C27K 6AB 27 (24 to 3) 19 max. 42[2A].1 max. 48 max. 43 typ. AVR-M168C27K 2AB 27 (24 to 3) 19 max. 42[2A].1 max. 2 max. 16 typ. AVR-M168C27M ACB 27 (24 to 3) 19 max. 54[2A].5 max. 1 max. 6 typ. AVR-M168C27M AAB 27 (21.6 to 32.4) 17 max. 52[2A].5 max. 2 max. 3 typ. AVR-M168C27M ABB 27 (21.6 to 32.4) 17 max. 52[2A].5 max. 2 max. 15 typ. AVRM168C39K 271N 39 (35 to 43) 28 max. 69[2A].1 max. 78 max. 27 typ. 212 type AVR-M212C12M 6AB 12 (9.6 to 14.4) 7.5 max. 2[5A].2 max. 6 max. 1 typ. AVR-M212C22K 6AB 22 (19.8 to 24.2) 16 max. 38[5A].3 max. 1 max. 8 typ. AVR-M212C39K 6AB 39 (35 to 43) 28 max. 62[5A].3 max. 1 max. 43 typ. 141 type AVR-M14A2C24M 6N 24 (2 to 27) 16 max. 5[1A].1 max. 5 max. 6 typ.[1mhz] AVR-M14A2C27M 47N 27 (21.6 to 32.4) 15 max. 54[1A].7 max. 5 max. 47 typ.[1mhz] AVRM14A2C27M 15N 27 (21.6 to 32.4) 15 max. 55[1A].2 max. 3 max. 15 typ.[1mhz] AVRM14A2C27M 3R3F 27 (21.6 to 32.4) 1 max. 45[.2A].2 max..2 max. 3.3 typ.[1mhz] Packaging quantities (Taping) (pieces/reel) 15, 1, 4, 2, 4, TERMINOLOGY Item Unit Terminology Varistor voltage V1mA Voltage measured across the varistor (Break voltage) (V) when DC1mA is applied. Maximum DC voltage that can be applied continuously. Maximum continuous Vdc Varistor leakage current: 5µA max. voltage (Rated voltage) (V) (Within the range of maximum allowable circuit voltage) Clamping voltage Maximum energy Maximum peak current Capacitance Vcl (V) E (Joule) Ip (A) C (pf) Voltage appearing across the varistor when a pulse current (8/2µs 1 ) of specified peak value is applied. Maximum energy that can be absorbed without deteriorating varistor characteristics when an impulse (1/1µs 2 ) is applied once. Maximum current that can be withstood without deteriorating varistor characteristics when an impulse current (8/2µs 1 ) is applied once. Capacitance measured at 1kHz (or 1MHz) of oscillator frequency and 1Vrms of oscillator voltage. 1 8/2µs test waveform Current 2 1/1µs test waveform Energy 1% 9% 5% 1% 9% 5% 8µs 2µs Time 1µs 1µs Time

5 (5/1) AVRL TYPE PRODUCT IDENTIFICATION AVRL 1 1A 3R3 F T A (1) (2) (3) (4) (5) (6) (7) (1) Series name (2) Dimensions L W mm mm (3) Maximum continuous voltage 1A (4) Capacitance 1R1 3R3 6R8 (5) Capacitance tolerance N F G (6) Packaging style T B 1Vdc 1.1pF 3.3pF 6.8pF ±.3pF ±1pF ±2pF Taping Bulk SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PAT- TERN W T B L Type L W T B min. Weight (mg)typ ±.5.5±.5.5± ±.1.8±.1.8± b a b c Type a b c 15.3 to.5.35 to.45.4 to to.8.6 to.8.6 to.8 (7) Varistor voltage and TDK internal code ELECTRICAL CHARACTERISTICS Part No. Capacitance C(pF) [1kHz, 1Vrms] : Packaging style(t: Taping/B: Bulk) Maximum continuous voltage (Rated voltage) Vdc(V) Insulation resistance Rdc(MΩ) [3Vrms] 15 type AVRL11A1R1N A 1.1[.8 to 1.4] 1 max. 1 min. 9 typ. AVRL11A1R1N B 1.1[.8 to 1.4] 1 max. 1 min. 39 typ. AVRL11C2R2D A 2.2[1.7 to 2.7] 16 max. 1 min. 9 typ. AVRL11A3R3F A 3.3[2.3 to 4.3] 1 max. 12 min. 27 typ. AVRL11A6R8G A 6.8[4.8 to 8.8] 1 max. 13 min. 27 typ. 168 type AVRL161A1R1N A 1.1[.8 to 1.4] 1 max. 1 min. 9 typ. AVRL161A1R1N B 1.1[.8 to 1.4] 1 max. 1 min. 39 typ. AVRL161A3R3F A 3.3[2.3 to 4.3] 1 max. 12 min. 27 typ. AVRL161A6R8G A 6.8[4.8 to 8.8] 1 max. 13 min. 27 typ. Varistor voltage V1mA(V)[DC1mA] Packaging quantities (Taping) (pieces/reel) 1, 4, TERMINOLOGY Item Unit Terminology C Capacitance measured at 1MHz of oscillator frequency and 1Vrms Capacitance (pf) of oscillator voltage. Maximum DC voltage that can be applied continuously. Maximum continuous Vdc Varistor leakage current: 5µA max. voltage (Rated voltage) (V) (Within the range of maximum allowable circuit voltage) Rdc Insulation resistance appearing across the varistor when specified Insulation resistance (MΩ) voltage is applied. Varistor voltage (Break voltage) V1mA (V) Voltage measured across the varistor when DC1mA is applied.

6 (6/1) TYPICAL ELECTRICAL CHARACTERISTICS CURRENT vs. VOLTAGE CHARACTERISTICS IMPEDANCE vs. FREQUENCY CHARACTERISTICS pF 6.8pF 3.3pF 1 1 V1mA:12V 3pF V1mA:8V 1 Current(A) V1mA:27V V1mA:22V V1mA:18V Impeadance(Ω) pF 16pF 4pF 65pF Voltage(V) Frequency(MHz) TRANSMISSION CHARACTERISTICS 1 CAPACITANCE vs. FREQUENCY CHARACTERISTICS 1 Insertion loss(db) pF 65pF 4pF 16pF 3pF 6.8pF 15pF 3.3pF Capacitance(pF) pF 65pF 4pF 16pF 3pF 15pF 6.8pF 3.3pF Frequency(MHz) Frequency(MHz)

7 (7/1) ELECTROSTATIC DISCHARGE TESTS TEST CONDITIONS 15pF, 33Ω contact discharge Charged voltage /8kV,.1s interval MEASURING CIRCUIT 1MΩ 33Ω Discharge gun Test sample High voltage DC power supply 15pF ESD simulator ESD simulator AVR-M63 TYPE AVR-M15 TYPE V1mA/V1mA(%) Number of discharge(times) AVR-M168 TYPE V1mA/V1mA(%) Number of discharge(times) V1mA/V1mA(%) Number of discharge(times) AVRL11A3R3F Capacitance(pF) [1MHz] Number of discharge(times)

8 (8/1) ELECTROSTATIC ABSORPTION CHARACTERISTICS DISCHARGE CURRENT WAVEFORM Discharge current(a) Time(ns) DISCHARGE VOLTAGE WAVEFORM Voltage(V) Open waveform 15pF, 33Ω, Contact discharge, Test level 1 AVR-M15C12MTAAB / V1mA:12V AVR-M15C8MTAAB / V1mA:8V Zener diode /Vz:6.2V Time(ns) WAVEFORM PARAMETERS [IEC61-4-2] Test level ESD Charge voltage (kv) MEASURING CIRCUIT First peak current of discharge (A) Rise time (ns) to to to to 1. Discharge gun ESD simulator 1MΩ High voltage DC power supply 33Ω 15pF ESD simulator Test sample 6dB attenuator 5Ω Oscilloscope I/O impedance: 5Ω Frequency range: DC to 18GHz ESD ABSORPTION CHARACTERISTICS COMPARISON OF VARIOUS ELEMENTS Clamping voltage(v) Peak Average Open waveform 271V 11V 258V 93V AVR-M15C8MTAAB AVR-M15C12MTAAB Zener diode/vz:6.2v V 96V (voltage) Peak voltage Average voltage Peak voltage:peak voltage of standing up part Average voltage : Average voltage of 3 to 1ns ESD (Electro Static Discharge) absorption characteristics of V1mA-8V is superior to Vz-6.2V Zener diode. 3 1 (ns)

9 (9/1) MERITS OF REPLACEMENT FROM ZENER DIODE (1) Reduction in the number of parts (2) Reduction in mounting cost COMPARISON OF FOOTPRINT Zener diode Chip varistor APPLICATION EXAMPLES CELLULAR PHONE Microphone/Receiver To LCD driver.8mm.5mm LCD panel 2.3mm 1.2mm Save a mount area 65% Key pad/switch Backlight LED Data terminal EXAMPLE OF REPLACEMENT AT AUDIO TERMINAL AUDIO/VIDEO Audio/out Audio AMP Audio connector Monitor OUT Video1 in Video2 in Video3 in Video5 in Digi Video Video Video Video Audio/out Audio AMP Audio connector L L/MONO L/MONO L/MONO L/MONO Audio Audio Audio Audio Audio R (3) Improved electrostatic absorption capability COMPARE DATA OF CHIP VARISTOR AND ZENER DIODE ABOUT IC PROTECTION Insulation resistance of tested circuit(ω) With Zener Diode AVR-M168C12MT6AB ESD voltage(kv) CMOS: D74HC4C ESD generator : Noise Laboratory Co.,Ltd., ESS -63A 2pF-Ω method model equipment Contact type discharge ESD applied point: Vcc-ground

10 (1/1) APPLICATION EXAMPLES USB 2. USB IC D D+ VDD USB cable USB connector F.G. MEASURING CIRCUIT Sample IC USB2. board on PC Test board Test set WITHOUT VARISTOR WITH VARISTOR AVRL11A3R3FT(3.3pF) AVRL11A6R8GT(6.8pF)

Varistors(SMD) Countermeasure for Surge and Static Electricity

(1/1) Varistors(SMD) Countermeasure for Surge and Static Electricity Conformity to RoHS Directive AVR Series AVR-M, AVRL Types Varistor (Variable resistor) is a nonlinear resistive element of the voltage