Epoxy resin capacitor KNSCHA 178MU0037 with laser printing and excellent

Product Specification

Product Overview

This product features imported, high-quality moisture-proof and flame-retardant epoxy resin encapsulation and laser printing technology, offering a compact size with low leakage current and dielectric loss. It boasts excellent frequency and temperature characteristics, a long service life, high reliability, and stable performance across a wide operating temperature range. Suitable for advanced , computer, automotive, communication, and home appliance applications, this product adheres to IEC 384-15-3 technical specifications and meets GB 7215-87 standards. It is designed for high stable performance, low leakage current and dissipation factor, and stable frequency and temperature, ensuring a long life.

Product Attributes

• Material: Imported high-quality moisture-proof and flame-retardant epoxy resin encapsulation
• Technology: Laser printing
• Standards: IEC 384-15-3, GB 7215-87
• Polarity: Polar capacitors (do not apply reverse voltage)
• Packaging Options: Reel (T), Bulk (B)

Technical Specifications

Usage and Handling Precautions

To ensure optimal performance and stability, capacitors must be used correctly. Verify usage conditions and specified performance before use, adhering strictly to all conditions outlined in the specification. Avoid applying excessive external force that could damage the capacitor body or lead terminals. Do not reuse dropped or previously installed capacitors. After installation, do not process or bend terminals. Avoid direct contact with bare hands during measurement and use to prevent contamination from sweat or oil, which can lead to poor solderability. For soldering with a soldering iron, maintain tip temperature below 350 and use for no more than 4 seconds, ensuring the tip does not contact the capacitor body. For chip-type products, avoid highly active or acidic fluxes. When using wave soldering, fix components with adhesive and immerse directly in the solder pot. Preheating should be under 160 for no more than 2 minutes, followed by slow cooling. When using other methods like hot plate or vapor soldering, consult the manufacturer. Ensure proper ventilation if component mounting density is high. When using multimeters for testing, do not test without regard to polarity. If a capacitor is subjected to improper reverse voltage during measurement, it should be scrapped, even if its electrical parameters appear normal. Do not use in environments with direct contact with water, brine, or oil; direct sunlight; high temperature and humidity causing condensation; exposure to reactive gases, acids, or bases; high-frequency wave induction; or excessive vibration or shock.

Circuit Design Considerations

• Operating Voltage: Capacitor failure is significantly influenced by the ratio of service voltage to rated voltage. Reduce voltage appropriately for required reliability. For low impedance circuits, set operating voltage to 1/3 of rated voltage; for other circuits, 2/3 of rated voltage. In low impedance circuits, parallel use increases the risk of DC inrush failure. Control instantaneous large currents; consider series resistance (3/Vs) to limit current below 300mAs. If protection resistors cannot be used, operate at 1/3 of rated voltage.
• Reverse Voltage: Tantalum capacitors are polarized; do not apply reverse voltage or use in AC-only circuits. Limited reverse voltage is permissible for short durations: 10% U_R or 1V (whichever is smaller) at 25, and 5% U_R or 0.5V (whichever is smaller) at 85. For long-term use in reverse circuits, use non-polar capacitors.
• Ripple Voltage: Use within the permissible ripple voltage. The sum of DC bias and AC partial voltage peak must not exceed the rated voltage. The combination of AC negative peak and DC bias must not exceed the permissible reverse voltage. Ripple current causes power loss, increasing the risk of thermal breakdown. Limit ripple current or allowable power loss.
• Environmental Temperature: Use within the specified operating temperature range. Voltage derating is required above +85. Temperature characteristics are critical; confirm circuit performance at upper and lower limits when temperature varies significantly. For general design, a failure rate benchmark of 1000 hours at +85 with rated voltage is used. Derating to below 65% U_R is recommended for practical circuits to handle voltage/current peaks and ripple. For safety-critical equipment, prevent short/open circuits by designing protective circuits, devices, and systems, and consider redundant circuits to prevent single-point failures.
• Frequency Dependence: Electrical characteristics change significantly around 10kHz. Confirm circuit characteristics when using high-frequency circuits.
• Reliability: Failure rates vary with operating conditions (ambient temperature, applied voltage, circuit resistance, etc.). Select appropriate products after thorough analysis of usage conditions.