jbcapacitors blog

When space is tight and tuning accuracy matters, finding the SMD ceramic trimmer capacitor with the right specs becomes critical—especially when most suppliers only offer legacy through-hole options or are out of stock.

The jb JKA Series provides RF designers and engineers with:

• Ultra-compact 3mm size
• Low capacitance drift
• High Q value at 1MHz
• Dust-proof, sealed construction
• Available inventory ready to ship

Why SMD Trimmer Capacitors Are Rare

Most trimmer capacitors on the market are bulky through-hole types, making them unsuitable for today’s miniaturized designs. SMD versions with a 3mm footprint are hard to find—and in high-frequency applications, the need is critical.

That’s why we designed the JKA Series: an SMT-compatible, precision tuning solution with high mechanical reliability, low drift, and strong thermal performance.

Technical Specifications

Rotation torque: 15 ~ 72 gf·cm

Operating temperature: −25℃ to +85℃

Size: 3.2 mm × 4.5 mm × 1.5 mm (W × L × T)

Download Full Datasheet

Applications

• RF and Communication Circuits
• Impedance Matching and Signal Tuning
• High-frequency Filter Networks
• Wearable Devices and IoT Modules

Its compact design and reliability make it ideal for space-limited, performance-critical designs.

In Stock and Ready to Ship

Unlike many suppliers with limited or delayed stock, our JKA SMD Ceramic Trimmer Capacitors are available for immediate shipment—supporting your prototype or production needs without delay.

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Contact Us

Email: info@jbcapacitors.com
Website: www.jbcapacitors.com

Need help selecting the right capacitance value? We’re here to support your design process.

In modern power electronic design, effective EMI suppression is a critical challenge. With higher switching frequencies and complex topologies, demand for reliable AC filter capacitors continues to grow. Selecting the right capacitor directly impacts system reliability, thermal performance, and compliance with EMI standards.

The jb® JFQF AC Filter Capacitor series is built with metallized polypropylene film, optimized for AC output filtering in solar inverters, UPS systems, and LCL filters. These capacitors deliver low ESR, high ripple current endurance, and proven long-term stability.

Key Advantages of JFQF Capacitors

• Low ESR and ESL for precise EMI suppression
• High ripple current handling in demanding environments
• Self-healing metallized film ensures long capacitor life
• UL 94V-0 epoxy sealing enhances safety and durability
• Wide voltage ratings — ideal for 250VAC to 480VAC filtering

JFQF capacitors are the preferred choice for engineers seeking stable AC filtering, compact form factor, and EMI reduction in industrial and renewable energy systems.

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

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

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.