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Get detailed specs, common applications, and practical selection tips for 0.1uF 100V capacitors. Compare types, local availability, and brands at Communica.
See voltage, tolerance, material, and physical size factors for 0.1uF 100V capacitors.
Discover where and how 0.1uF 100V capacitors are used in SA electronics.
Advice on choosing, sourcing, and lead times from Communica branches.
A 0.1uF 100V capacitor is a small passive electronic component that stores and releases electrical energy in a circuit. The key values here-0.1 microfarad (uF) for capacitance and 100V for rated voltage-define its energy storage ability and maximum working voltage.
This capacitor value is among the most popular for decoupling (filtering) high-frequency noise on power rails, coupling/AC isolation, and basic timing circuits. The high 100V rating means it can be used in both low-voltage digital and moderately high-voltage analog or power systems found across South African industries, education, and hobbyist projects.
| Spec | Common Values | Typical Relevance |
|---|---|---|
| Capacitance | 0.1uF (100nF) | Bypass, noise filtering, coupling |
| Voltage Rating | 100V DC | Allows higher voltage circuits or extra safety margin |
| Tolerance | 10% (typical) | Affects precision in timing/filter applications |
| Dielectric Type | X7R, C0G/NP0 (ceramic), polyester (film) | Impacts stability, ESR, and physical size |
| Package | Radial, axial, SMD | Board compatibility, picking method |
The 100V rating means the capacitor will safely operate up to 100V DC across its terminals. For mains power circuits (often 230V AC in South Africa) or automotive 12V/24V rails handling spikes, the high rating adds margin for surges, noise, and transients. Never use capacitors below the maximum expected system voltage; allow headroom for reliability and compliance with good engineering practice.
| Type | Main Use | Temp Stability | Size | Cost (ZAR, est.) |
|---|---|---|---|---|
| Ceramic X7R | Decoupling, noise filtering | Good | Small | ~1.00 to 3.00 |
| Ceramic C0G | Timing, high stability | Excellent | Small-medium | ~2.00 to 6.00 |
| Film (Polyester) | Audio, analog, EMI snubbers | Very good | Medium | ~3.50 to 9.00 |
If you're designing a microcontroller circuit powered from a 24V DC industrial rail, you might add a 0.1uF 100V X7R ceramic capacitor close to the MCU's VCC-GND pins for local decoupling. If switching noise of up to 10V spikes is observed, the 100V rating provides ample margin.
Time Constant Calculation: For an RC low-pass filter:
τ = R x C = 10kΩ × 0.1uF = 1ms
Cutoff frequency fc = 1/(2πτ) ~ 159Hz
This means your 0.1uF 100V capacitor can filter out most high-frequency noise when paired with typical resistor values.
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Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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