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- Catalogue - PROTECTIVE DEVICES - Edition 2015 - AV series
Catalogue - PROTECTIVE DEVICES - Edition 2015 - AV series
Catalogue - PROTECTIVE DEVICES - Edition 2015 - AV series
KEKO VARICON provides a variety of protective devices, including varistors and capacitors, for applications in automotive electronics, telecommunications, and industrial products. The catalog stresses the importance of verifying data sheets before ordering due to potential specification changes.
Available in SMD, THD, and high energy variants, varistors are designed to handle different voltage and current levels. Custom designs are available to meet specific requirements.
The catalog features safety class X and Y disc capacitors and high voltage disc capacitors for RFI suppression, available in various capacitance and voltage ratings.
The AV series protects automotive electronic systems from voltage transients, with features such as:
- Supply voltages of 12V, 24V, and 42V.
- Operating voltage range from 3V to 170V.
- Load dump energy up to 50J.
- Operating temperature range from -55°C to +125°C.
- Available in six model sizes: 0805, 1206, 1812, 2220, 3225.
- RoHS 2, REACH, and GADSL compliant.
- AEC-Q200 qualified Grade 1.
Detailed specifications for AV series models include voltage ratings, surge current capabilities, and energy handling capacities, with specified dimensions for each model size.
Reliability is discussed in terms of mean life and failure rate, influenced by applied voltage and ambient temperature, calculated using the Arrhenius model.
The failure rate formula emphasizes the Factor of Applied Voltage (FAV), calculated using applied voltage and maximum operating voltage. Dimensions for chip sizes range from 0603 to 3225.
Details are provided for soldering pad configurations for different chip sizes, including dimensions for length, width, and other parameters.
Conforms to IEC Publication 286 - 3 Ed.4: 2007-06, with detailed specifications for tape and reel dimensions for various chip sizes.
Includes series names, maximum continuous working voltage, tolerance, chip size, maximum surge current, and packaging options.
Discusses popular soldering techniques such as Wave and Infrared Reflow processes, suitable for both Pb-containing and Pb-free solders, with recommendations for solder fluxes and the importance of avoiding thermal shock.
Criteria for acceptable solder joints are discussed, with emphasis on termination material process profiles and visual inspection guidelines.
Details on Pb-free wave and IR reflow soldering highlight the environmentally friendly nature of KEKO-VARICON chips.
Outlines test procedures for solderability and resistance to flux, with acceptance criteria for various soldering methods.
Guidelines for using soldering irons for reworking varistor chips are provided, with strict criteria to avoid damage.
SMD varistors should be used within one year of purchase to ensure reliability.
Varistor testing procedures adhere to standards CECC 42200, IEC 1051-1/2, and AEC-Q200. Testing results are available upon request, and special tests can be conducted as needed.
- AC/DC Bias Reliability: Tested according to CECC 42200, IEC 1051-1, and AEC-Q200 standards. Conditions post-testing require |δVn (1 mA)| to be less than 10%.
- Pulse Current Capability: Conducted under CECC 42200 and IEC 1051-1 standards with 10 pulses at maximum peak current. Post-test conditions require |δVn (1 mA)| to be less than 10% with no visible damage.
- Pulse Energy Capability: Similar testing conditions as Pulse Current Capability with the same post-test requirements.
- Environmental and Storage Reliability: Includes climatic sequence, thermal shock, and steady-state damp heat tests. Post-test conditions require |δVn (1 mA)| to be less than 10%.
- Mechanical Reliability: Tests include solderability, resistance to soldering heat, terminal strength, board flex, vibration, and mechanical shock. Post-test conditions require no visible damage and specific |δVn (1 mA)| limits.
- Rated AC/DC Voltage: Maximum continuous voltage applicable under specified conditions.
- Leakage Current: Current passing through the varistor at specified conditions.
- Clamping Voltage Protection Level: Peak voltage across the varistor during a current pulse.
- Jump Start Transient: Overvoltage condition due to voltage regulation failure or deliberate generation.
- Load Dump Transient: Occurs in automotive environments during battery disconnection.
- Response Time: Time lag between surge application and varistor conduction.
KEKO VARICON products are sold by description only, and specifications may change without notice. Customers are advised to verify data sheets before ordering. The company assumes no responsibility for the use of its products or any patent infringements.
Catalog excerpts
Catalogue - PROTECTIVE DEVICES - Edition 2015 Varistors SMD, THD, High Energy Varicons Multilayer SMD and THD Dual Function Varicons Capacitors Safety class X and Y disc capacitors High voltage disc capacitors
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OVERVIEW OF PROTECTIVE DEVICES Basic Electrical Custom Design Maximum Steady State Applied Voltage (Vrms) Special Medium VbHage Varistors Square Shaped High Energy Varistors ZOVR Series Round Shaped High Energy Varistors ZOVH/ZOVS Series High Energy Varistors Medium Voltage Medium Voltage RFI Suppression Ceramic Capacitors Safety Ceramic Capacitors Voltage Varistors Medium Voltage Low Voltage Dual Function Varicons High Voltage Disc Cermic Capacitors CLand CSeries: C = lpFto 4,7uF, X7R, C series: AgPd, Barrier End Terminations, Custom Design Dual Function Custom Design Varicoos 8,11 sss>- 2220,3225...
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APPLICATION FIELDS Maximum Steady State Applied Voltage (Vrms) ZOVR Series Round Shaped High Energy Varistors High Energy Industrial Products ZOV Series Square Shaped High Energy Varistors SV Series Special Medium Voltage Varistors CV+ Series Medium Voltage Varistors CV Series Medium Voltage Varistors Telecommunication Products KM Series RFI Suppression Ceramic Capacitors KZ Series Safety Ceramic Capacitors KV Series High Voltage Disc Cermic Capacitors PV Series Low & Medium Voltage Varistors DV Series Medium Voltage Varistors MV Series Low Voltage Dual Function Varistors Low Voltage Board Level...
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AUTOMOTIVE VARISTORS - AV SERIES Description Almost all-electronic systems in an automobile, e.g. anti-lock brake system, direct ignition system, airbag control system, wiper motors, etc. are susceptible to damage from destructive voltage transients. AV varistors are transient suppressors with temperature independent suppression characteristics enabling protection from -55 °C to 125 °C. AV varistors offer excellent transient energy distribution. AV varistors require significantly less space and pad area than silicon TVS diodes, offering greater circuit board layout flexibility for the designer....
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Device Ratings and Characteristics 0,5 KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate and reliable. However, no responsibility is assumed by KEKO VARICON for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
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Protection Level Pulse Rating Curves * In the most demanding conditions as per the tolerance region KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate and reliable. However, no responsibility is assumed by KEKO VARICON for its use; nor for any infringements of patents or other rights...
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Pulse Rating Curves * In the most demanding conditions as per the tolerance region KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate and reliable. However, no responsibility is assumed by KEKO VARICON for its use; nor for any infringements of patents or other rights of third parties...
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Protection Level Pulse Rating Curves * In the most demanding conditions as per the tolerance region KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate and reliable. However, no responsibility is assumed by KEKO VARICON for its use; nor for any infringements of patents or other rights...
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Reliability – Lifetime In general, reliability is the ability of a component to perform and maintain its functions in routine circumstances, as well as hostile or unexpected circumstances. The mean life of AV series components is a function of: •• Factor of Applied Voltage •• Ambient temperature. Mean life is closely related to Failure rate (formula). vMean life (ML) is the arithmetic mean (average) time to failure of a component. Failure rate is the frequency with which an engineered system or component fails, expressed for example in failures per hour. Failure rate is usually time dependent,...
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KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate and reliable. However, no responsibility is assumed by KEKO VARICON for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
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Tape and Reel Specification +0.1 Cover tape Variable dimensions Tape Size Size Ao Bo Ko max B1 max D1 min E2 min P1 F W T2 max W1 W2 max W3 A Package units Reel size Reel size Reel size Reel size Reel size Reel size Reel size Reel size KEKO VARICON products are sold by description only - product technical specification. KEKO VARICON reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by KEKO VARICON is believed to be accurate...
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