Reliable EMI Suppression in AC Circuits – Discover the jb JFT X1 Film Capacitor
In power supplies, lighting systems, HVAC controllers, and industrial automation, EMI noise is a common yet critical issue that engineers must solve. Choosing the right X1 class film capacitor not only ensures regulatory compliance but also significantly improves circuit reliability.
That’s where jb’s JFT Series comes in — a compact, safety-certified EMI suppression capacitor engineered for stability, performance, and peace of mind.
Why Choose the jb JFT X1 Capacitor?
The JFT Series is a metallized polypropylene film capacitor designed for AC interference suppression between line and neutral (L–N). Fully compliant with IEC 60384-14 Class X1 standards, it offers:
- Rated voltages of 300VAC and 440VAC
- Withstands up to 4kV surges, suitable for noisy AC environments
- Compact design starting at just 13 × 11 × 5 mm
- Self-healing structure for long-lasting stability
- ±10% capacitance tolerance, with values from 0.0022μF to 4.7μF
- Operating temperature: –55°C to +105°C
Its slim size allows easy integration into space-constrained PCB layouts without sacrificing electrical performance or safety.
Typical Applications
The JFT Series is widely used in:
- AC line filters for EMI suppression
- Switch-mode power supplies (SMPS)
- LED drivers
- HVAC controllers and smart meters
- Chargers and energy monitoring devices
- Industrial automation systems
In these applications, X1 capacitors are vital for reducing differential-mode interference while complying with global EMC and safety standards.
JFT vs. Conventional Ceramic Capacitors – A Quick Comparison
| Feature | JFT X1 Film Capacitor | General Ceramic Capacitor |
|---|---|---|
| EMI suppression efficiency | ✔️ Excellent | ⚠️ Moderate |
| Surge resistance | ✔️ Up to 4kV | ⚠️ Limited |
| Safety certification (X1) | ✔️ Yes | ❌ No |
| Self-healing failure mode | ✔️ Yes | ❌ Risk of short-circuit |
| Long-term reliability | ✔️ High | ⚠️ Medium |
For mission-critical or high-reliability environments, JFT clearly outperforms.