Why jb Axial Film Capacitors Excel in Pulse Applications

0 comments 2025-8-5 15:39:48 views

In pulse applications, engineers face a tough challenge: selecting a capacitor that not only withstands high voltage surges but also maintains stability over time without failure. jb Capacitors’ JFG Axial Film Capacitor Series is engineered exactly for this.

Whether you’re designing switching power supplies, audio crossovers, or pulse discharge circuits, finding a durable, low-loss, self-healing axial film capacitor makes a critical difference. That’s where the jb JFG series stands out — offering both cycloidal and flat oval structures across polyester (PET) and polypropylene (PP) film types to match your precise requirements.

What Makes jb JFG Capacitors Ideal for Pulse Circuits?

  • High Pulse Endurance: Low dissipation factor and excellent self-healing capability ensure reliability in surge-heavy environments.
  • Wide Capacitance Range: 0.01µF to 68µF, with voltage ratings up to 1250VDC.
  • Flexible Structures: Cycloidal (JFGA/JFGC) or Flat Oval (JFGB/JFGD), optimizing PCB layout and heat dissipation.
  • Material Options: PET for general use, PP for high-frequency or high-voltage applications.

Applications That Rely on Pulse-Ready Capacitors

Common applications that benefit from pulse film capacitors include:

  • Pulse forming networks
  • Flash circuits
  • High-energy discharge circuits
  • Resonant power converters
  • EMI/RFI suppression

Thanks to their compact size and axial lead design, jb JFG capacitors are especially suitable for tight mechanical constraints while maintaining superior insulation resistance and dielectric stability.

How to Choose Between Cycloidal and Flat Oval?

Both designs offer excellent electrical properties, but the structure you choose affects layout and cooling:

  • Cycloidal: Ideal when space along one axis is less limited.
  • Flat Oval: Better for height-constrained or high-density boards.
  • Polypropylene (JFGC/JFGD): Recommended for high-frequency switching to minimize energy loss.

Datasheets & Ordering Info

🔍 View full specs and download datasheets →

Have a project in mind? Contact us at info@jbcapacitors.com for samples or custom solutions.

Contact jb Capacitors

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Understanding X1 Class Film Capacitors: Why jb’s JFT Series Is a Reliable EMI Filter Choice

2 comments 2025-7-2 11:59:40 views

 

In AC applications where EMI suppression, safety compliance, and compact design are essential, choosing the right Class X1 film capacitor is critical to ensure stability and regulatory compatibility. The jb JFT series is built for these needs—delivering consistent electrical performance, compact dimensions, and full X1-class certification.

What is a Class X1 Capacitor?

X1 capacitors are safety-certified components used across the line (L–N) to suppress differential-mode interference in AC circuits. As defined by IEC 60384-14:

  • Withstand impulses up to 4kV, suitable for industrial and commercial-grade environments.
  • Built with fail-safe, self-healing construction for stability under harsh electrical stress.

Applications include switching power supplies, motor drives, HVAC controls, and AC line filtering.

Key Features of jb JFT X1 Film Capacitors

Specification Details
Capacitor Class X1 (Interference Suppression)
Rated Voltage 300VAC / 440VAC
Capacitance Range 0.0022µF to 4.7µF
Capacitance Tolerance ±10%
Operating Temperature −55°C to +105°C
Dissipation Factor (1kHz) Max. 0.001
Insulation Resistance ≥15,000 MΩ (C ≤ 0.33µF)
Package Size As small as 13 × 11 × 5 mm

Typical Applications

  • AC input EMI filters
  • Switched-mode power supplies (SMPS)
  • LED driver circuits
  • HVAC control systems
  • Industrial automation devices
  • Smart sockets, adapters, and AC-powered appliances

Engineered for long-term stability under fluctuating AC voltage, making them ideal for mission-critical use cases.

Why Engineers Prefer the JFT Series

Feature JFT X1 Capacitor Standard Ceramic Capacitor
EMI Suppression Excellent Moderate
Safety Certification (X1) Yes No
Surge Voltage Handling Up to 4kV Limited
Fail-Safe Mechanism Self-healing Short-circuit risk
Long-Term Reliability High Medium

With excellent electrical properties, compact design, and international compliance, the JFT series is a preferred choice for engineers building high-performance, safety-compliant AC products.

Explore JFT Datasheet ›Contact Us for Samples ›
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