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Capacitor PCB Pad Layout Recommendations
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- Provides land pattern and spacing guidelines to ensure strong solder joints and minimize mechanical stress on capacitors.
- Helps reduce cracking, improve reliability, and increase assembly yield.
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Capacitor RF Current & Power
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- Explains how to determine a capacitor’s RF current handling and power dissipation limits.
- Ensures safe operation in high-frequency circuits by preventing overheating and failure.
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EIA-198 2-Digit Capacitor Marking System
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- EIA-198 2-Digit Marking System explains the industry marking system used to identify capacitor values.
- Helps engineers quickly decode capacitance markings for proper component selection and verification.
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Q & ESR Explained
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- Defines Quality Factor (Q) and Equivalent Series Resistance (ESR) in capacitors.
- Shows how these parameters directly affect circuit efficiency, losses, and RF performance.
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S-Parameter Measurements
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- Describes how to measure and interpret S-parameters for RF capacitors.
- Guides engineers in analyzing insertion loss, return loss, and impedance matching.
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Soldering Profiles & Guidelines for SMT Ceramic Components
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- Outlines recommended reflow soldering temperature/time profiles for MLCCs.
- Prevents thermal shock and cracking while ensuring reliable solder joints.
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SRF & PRF for RF Capacitors
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- Explains Self-Resonant Frequency (SRF) and Parallel Resonant Frequency (PRF).
- Provides selection guidance for RF tuning, filtering, and impedance control.
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MSL Rating (Moisture Level Sensitivity)
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- Defines how long a component can safely remain at room conditions before soldering or reflow.
- Prevents moisture absorption that can lead to cracking, delamination, or failures during assembly.
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Recommended Storage Conditions
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- Lists ideal temperature, humidity, and packaging requirements for storing capacitors.
- Maintains long-term solderability and ensures component reliability before assembly.
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Part Number Explanation
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- Breaks down Johanson’s capacitor part numbering system into clear segments.
- Each section of the code represents attributes such as dielectric, capacitance value, tolerance, case size, termination, and voltage rating.
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Tin Whisker Testing
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- Summarizes Johanson’s compliance with JEDEC Class 2 tin whisker testing standards.
- Confirms plating finishes are robust for long-term reliability in critical applications.
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