SAMXON RD Series Aluminum Electrolytic Capacitors

Product Overview

The SAMXON RD Series is a line of polar aluminum electrolytic capacitors (foil type) designed for use in electronic equipment. These capacitors meet IEC60384 standards and are constructed with a single-ended type, featuring terminals fixed to anode and cathode foil, wound together with paper, and impregnated with electrolyte. The wound element is enclosed in an aluminum case, sealed with end seal rubber, and finished with a vinyl sleeve. They are suitable for applications requiring reliable performance across a range of temperatures and voltages.

Product Attributes

• Brand: SAMXON
• Series: RD Series
• Type: Polar Aluminum Electrolytic Capacitor (Foil Type)
• Construction: Single Ended
• Sleeve Material: PET
• Sealing Material: Rubber
• Lead Line Material: Tinned CP wire (Pb Free)
• Terminal Material: Aluminum wire
• Case Material: Aluminum case
• Separator Material: Electrolyte paper
• Compliance: Meets IEC60384 standards

Technical Specifications

General Characteristics

Environment-related Substances

Controlled substances list is available in the latest document "Environment-related Substances standard" (WI-HSPM-QA-072), including heavy metals, chlorinated organic compounds, brominated organic compounds, and others.

Application Guidelines - Circuit Design Considerations

• Operating Temperature and Frequency: Parameters vary with temperature and frequency. Higher temperatures increase leakage current and capacitance, decrease ESR. Lower temperatures decrease leakage current and capacitance, increase ESR. Higher frequencies decrease capacitance and impedance, increase tan. Lower frequencies increase ESR, leading to ripple current generated heat.
• Operating Temperature and Life Expectancy: Refer to life calculation documentation.
• Common Application Conditions to Avoid: Reverse Voltage, repeating Charge/Discharge applications, Over voltage (exceeding rated voltage, sum of DC and AC ripple voltage must not exceed rated voltage), and exceeding maximum specified ripple currents.
• Using Two or More Capacitors in Series or Parallel: Parallel connections require careful wiring to balance ripple current loads. Series connections may require shunt resistors to balance voltage.
• Capacitor Mounting Considerations: Avoid wiring patterns under the capacitor, ensure proper hole spacing, provide clearance for pressure relief vents, and avoid locating high voltage/current wiring above vents.
• Electrical Isolation: Ensure complete isolation between cathode/case and anode terminal/other paths.
• Capacitor Sleeve: The vinyl sleeve is for marking and identification, not electrical insulation. It may split or crack when exposed to solvents and high temperatures.
• Safety Precautions: Plan for worst-case failure modes (short/open circuits) and provide protection circuits.

Capacitor Handling Techniques

• Considerations Before Using: Capacitors have finite life; do not reuse from used equipment. Discharge transient recovery voltage if required. Long-term storage may increase leakage current (recondition with ~1k resistor). Avoid using dropped, dented, or crushed capacitors.
• Capacitor Insertion: Verify capacitance, rated voltage, and polarity. Ensure correct hole spacing to avoid stress. Auto insertion lead clinching should not stress leads at the seal.
• Manual Soldering: Observe temperature and time specifications (max 400 for 3s). Avoid stress on lead wires at the seal. Do not touch capacitor body with soldering iron.
• Flow Soldering: Do not immerse capacitor body into solder bath. Observe proper soldering conditions. Prevent other components from touching the capacitor during soldering.
• Other Soldering Considerations: Avoid rapid temperature rises during preheat and resin bonding.
• Capacitor Handling after Solder: Avoid movement after soldering to prevent stress on lead wires. Do not use capacitor as a handle. Avoid striking the capacitor after assembly.
• Circuit Board Cleaning: Use suitable cleaning solvents (up to 5 min, 60 max). Avoid ozone depleting agents, halogenated solvents (except for solvent-resistant types), alkali solvents, petroleum based solvents, xylene, and acetone. Thorough drying is required. Monitor contamination levels.
• Mounting Adhesives and Coating Agents: Avoid materials containing halogenated solvents or chloroprene based polymers. Dry thoroughly after application.

Precautions for Using Capacitors

• Environmental Conditions: Do not store or use outside rated temperature range, in direct contact with water/oil, high humidity, toxic gases, ozone, radiation, UV rays, or exceeding vibration/shock requirements.
• Electrical Precautions: Avoid touching terminals due to electric shock risk. Do not short terminals with conductive materials.

Emergency Procedures

• If pressure relief vent operates, immediately turn off equipment and disconnect power. Avoid contact with escaping electrolyte gas/liquid. Flush eyes with water, gargle if ingested, wash skin with soap and water.

Long Term Storage

Leakage current increases with long storage times. Recondition capacitors stored for over one year by applying rated voltage in series with a 1000 resistor for 30 minutes. Products with date codes over eighteen months require confirmation.

Capacitor Disposal

Dispose of by incineration after crushing or puncturing the can wall, or as solid waste. Follow local disposal requirements. Incinerate at high temperatures to prevent release of toxic gases.