Feed-Through Capacitor M4 EMI Filter 10pF–2µF 100V | 10–20 PCS

Feed-Through Capacitor M4 EMI Anti-Interference Filter

Keep your circuits clean and your signals stable with these high-quality Feed-Through Capacitors. Available in a wide range of capacitance values — from 10 pF all the way up to 2 µF — and rated at 100V, these Metric M4-thread components are engineered to suppress electromagnetic interference (EMI) and radio-frequency interference (RFI) in sensitive electronic circuits. Whether you're working on power supply filtering, PCB-level EMI shielding, or industrial control systems, these feed-through capacitors deliver dependable performance in a compact, easy-to-mount package.

Made in Mainland China.

Key Features

• Wide Capacitance Range: Choose from 10 pF, 100 pF, 1000 pF (102), 2200 pF, 3300 pF, 4700 pF, 1 µF, or 2 µF to match your specific circuit requirements.
• 100V Voltage Rating: Suitable for a broad range of low-to-medium voltage applications.
• Metric M4 Thread Mount: Standard M4 threading ensures secure, reliable panel or chassis mounting without the need for specialized tools.
• Effective EMI/RFI Suppression: Feed-through design routes the signal conductor directly through the capacitor body, providing superior filtering compared to conventional bypass capacitors.
• Value Packs Available: Choose between 10-piece or 20-piece quantities — ideal for prototyping, repair, and production runs alike.
• Broad Compatibility: Compatible with power line filtering, RF shielding enclosures, motor drive boards, and general electronics projects.

Specifications

What Are Feed-Through Capacitors?

Unlike standard surface-mount or through-hole capacitors, a feed-through capacitor has three terminals — the signal passes through the center conductor while the capacitor body connects to the grounded enclosure or chassis. This geometry creates a highly effective low-pass filter that diverts high-frequency EMI noise directly to ground, preventing it from propagating through your circuit or escaping as radiated emissions. They are a go-to solution for engineers designing to meet EMC compliance standards.

For more information on electromagnetic compatibility (EMC) standards and best practices, visit the NIST Electromagnetic Compatibility resources.

Frequently Asked Questions

Q: What capacitance values are included, and how do I choose the right one?

A: This listing offers 10 pF, 100 pF, 1000 pF (102), 2200 pF (223), 3300 pF, 4700 pF, 1 µF, and 2 µF options. For high-frequency EMI suppression (RF, switching noise), smaller values like 100 pF–1000 pF are typically most effective. For low-frequency or mains-line filtering, larger values such as 1 µF–2 µF are preferred. Select based on the frequency range of the interference you need to attenuate.

Q: What does the M4 thread designation mean for mounting?

A: M4 refers to the Metric standard thread with a 4 mm nominal diameter. This is a widely used panel-mount thread size — simply drill a standard M4 hole in your chassis, enclosure, or PCB standoff, and secure the capacitor with the included or standard M4 nut for a solid, grounded connection.

Q: Are these feed-through capacitors suitable for both AC and DC circuits?

A: Yes. With a 100V rating, these capacitors can be used in both DC applications and low-voltage AC circuits, provided the peak voltage does not exceed the rated value. Always verify that your application's operating voltage, including transient spikes, remains within the 100V rating for reliable long-term performance.

Q: What is the difference between a 10-piece and 20-piece pack?

A: Both packs contain the same high-quality feed-through capacitors. The 10-piece option is ideal for prototyping or small repairs, while the 20-piece pack offers greater value for production runs, lab stock, or projects requiring redundancy.