Syfer's application notes
Knowles offers a solution in both our original and PSL range for operation up to 250Vac 60Hz continuous use provided for non-safety critical applications where extended capacitance ranges are required.
The purpose of this report is to provide details regarding: International Specifications that define bend test methods and acceptability. Methods employed by Syfer to measure the mechanical performance of the termination material. The shape of cracks created by PCB bending - mechanical stress.
Capacitor ageing is a term used to describe the negative, logarithmic capacitance change that takes place in ceramic capacitors with time. The ageing process has a negligible affect on Class 1 product but should be taken into account when measuring Class 2 (X7R, Y5V & Z5U) product.
All fluorescent lamps require a ballast to provide the electrical power to preheat the lamp electrodes, strike the lamp, provide the running power and control the discharge current.
This application note is primarily aimed at Space customers to provide outgassing test data conducted in accordance with ECSS-Q-70-02A on Syfer’s FlexiCap™ termination material.
This is the case for oxidising atmosphere fired ceramic capacitors which are manufactured at Syfer.
The introduction of lead free solders for attachment of chip capacitors to PCB’s has raised a further area of concern in that lead free solders are less ductile than their traditional tin/lead equivalents.
When selecting an X2Y component for use in a DC motor the first thing to consider is the filtering frequency requirement. Generally for motors the higher capacitance values are most suitable.
An alternative termination material specifically designed to absorb greater levels of mechanical stress thereby reducing capacitor failures associated with mechanical cracking
Syfer Technology Limited is a premier global source for application specific multilayer ceramic capacitors and EMI suppression filters. Our comprehensive product range includes many applicationspecific capacitors, including FlexiCap™, as well as standard voltages and capacitance values.
Syfer Technology Ltd has developed a new range of capacitors aimed specifically at the high voltage LCD inverter market.
For applications such as Mil / Aerospace where reliability is paramount, Syfer hold the IECQ-CECC internationally recognised qualification for surface mount ceramic capacitors tested in accordance with the requirements of IECQ-CECC QC32100.
Due to its brittle nature, multilayer ceramic capacitors are more prone to excesses of mechanical stress than other components used in surface mounting.
The purpose of J-STD-020 is to identify the moisture sensitivity classification level of non-hermetic solid state surface mount devices. This enables proper packaging, storage and handled to prevent potential damage as a result of moisture-induced stress during soldering operations and/ or repair operations.
All ceramic MLCC based Syfer products consist of precious metal electrodes embedded in a dielectric material, externally terminated to provide electrical contact using a conductive metal ink and / or electroplated.
The PSL range with FlexiCap™ refers to a flexible termination material that is applied over a sintered termination.
MLCC are utilised in modems for the AC/DC converter in the power supply, isolation circuit and for filtering of the telephone line itself.
MLCCs are split into 2 main groups, stable Class 2 which includes X7R, X5R and X8R dielectrics and ultra-stable Class 1 which includes C0G/NP0 dielectrics.
This application note aims to demonstrate the effect the choice of solder alloy has when soldering to the internal bore of these through hole capacitors.