JKA Series: Rare SMD Ceramic Trimmer Capacitors with Immediate Availability

In high-frequency design, precision and reliability are non-negotiable. From RF filters to impedance matching circuits, a capacitor that drifts under thermal stress or vibration isn’t just inconvenient — it’s a design flaw waiting to happen.

That’s why engineers increasingly choose the JKA Series SMD Ceramic Trimmer Capacitors from jb Capacitors. These aren’t your average variable capacitors. They’re crafted for high stability, high Q performance, and robust SMT compatibility, making them ideal for demanding designs across RF, telecom, IoT, and wearable applications.

What Makes the JKA Series Different?

Unlike traditional through-hole trimmers, the JKA Series features a miniature 3mm surface mount form factor — just 3.2 × 4.5 × 1.5 mm — that supports layout optimization in space-constrained PCBs.

Each model offers a tightly defined capacitance range from 1.5 pF to 28.5 pF, and supports multiple temperature coefficients: NPO, N750, and N1300. This gives engineers the flexibility to fine-tune circuits without compromising reliability.

Reliable in the Field, Not Just on the Bench

The JKA Series is built for real-world durability. Its sealed housing prevents flux and dust contamination, while its high-temperature liquid crystal polymer body ensures minimal dielectric loss and solid mechanical strength.

The adjustable torque (15–72 gf.cm) allows precise calibration that stays fixed. Whether in portable radios, wireless modules, or automotive subsystems, JKA capacitors hold their performance across challenging environments.

When to Choose the JKA Series

If your application requires stable tuning across temperature and time, especially in the 1 MHz to 100 MHz range, the JKA Series is the go-to solution.

Consider it for designs like:

• Narrow-band RF amplifiers with fine impedance control
• IoT sensors requiring compact layouts and clean signals
• Filters needing stable response over thermal cycling

This is where high Q, low ESR, and minimal drift truly matter — and where jb’s JKA Series stands out.

Ready to Integrate?

Engineers worldwide rely on the JKA Series for high-precision analog and RF projects. Backed by a detailed datasheet and in-stock availability, it’s easy to spec into your next design.

Download datasheet and check availability → Click here

JBR Series: High-Precision Trimming Potentiometers

Trimming potentiometers play a critical role in analog circuit design—especially where fine voltage or resistance tuning is essential. Whether you’re calibrating a sensor, adjusting gain in an amplifier, or managing offsets in a comparator circuit, a high-precision variable resistor ensures your system stays stable and predictable.

The JBR Series offers a refined solution for those looking to integrate wirewound trimming potentiometers into tight PCB spaces. Designed for durability, smooth rotation, and low temperature drift, these components are ideal for both prototyping and long-term deployment.

Why Trimming Potentiometers Still Matter

Despite the rise of digital tuning systems, analog adjustment remains indispensable in many applications. A trimming potentiometer—also called a preset resistor or PCB tuning component—offers unmatched immediacy and cost-effectiveness when:

• Fine-tuning analog voltage dividers or bias networks
• Calibrating sensor thresholds or analog filters
• Making post-production adjustments in manufacturing lines
• Providing re-tuning capabilities without firmware changes

The JBR Series features single-turn and multi-turn potentiometer options with mechanical angles up to 3600°, tight linearity tolerance, and high resistance range—from 50 Ω up to 2 MΩ, depending on the variant.

Technical Highlights That Make the Difference

Engineered with wirewound construction, these potentiometers deliver consistent resistance behavior under thermal and mechanical stress. Designers will appreciate:

• Stable linearity for repeatable adjustment results (±0.25%–±0.5%)
• High insulation resistance (up to 1GΩ) and voltage handling
• Low rotational noise and consistent contact resistance
• Long life cycles—tested up to 10,000 adjustments

For engineers designing industrial control systems, sensor modules, or analog calibration interfaces, the JBR Series provides confidence in both initial setup and field reliability.

Applications You’ll Recognize

You’ll find these trimming potentiometers in everything from power supply feedback loops to automotive sensor calibration circuits. They’re especially well-suited for environments where analog signal integrity, EMI sensitivity, or thermal variation must be tightly controlled.

Still unsure if a mechanical tuning component is right for your project? Watch the video above to explore real-world implementations and mechanical behaviors of the JBR Series.

For detailed specifications and CAD drawings, visit: jbcapacitors.com

Contact Us

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

jb JFQF Series: Reliable Polypropylene Film Capacitors

When it comes to reliable AC filtering, not all capacitors are created equal. The jb® JFQF series stands out with its high stability, low ESR, and strong EMI suppression capability—making it an excellent choice for engineers working on UPS systems, solar inverters, and other AC power applications.

This series uses metallized polypropylene film, a material known for durability and self-healing behavior, and offers wide voltage options, including 250VAC, 275VAC, and up to 480VAC.

Whether you're designing a compact power converter or upgrading your AC output filter, JFQF capacitors can deliver the long-term performance and thermal reliability your design demands.

Designed with Practical Use in Mind

Feature	Benefit
Self-healing polypropylene film	Improved lifespan under voltage stress
Low ESR and high ripple capability	Reliable performance in high-frequency switching
Compact, epoxy-filled casing	Space-saving design with thermal protection

Download datasheet and review specs →
View JFQF Product Page

Contact Us

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

How to Solve EMI Noise in AC Circuits with a Compact X1 Capacitor?

EMI noise is a common issue in AC-powered electronic devices. Whether you're designing a switching power supply, a motor driver, or a smart plug, electromagnetic interference can cause instability, reduce performance, or even lead to failure in sensitive circuits.

So, how can engineers effectively suppress EMI in AC circuits without compromising on space or safety?

Use a Certified X1 Film Capacitor – Like jb’s JFT Series

X1 capacitors are safety-certified components designed for EMI suppression between the AC line and neutral. They are tested to withstand impulse voltages up to 4kV, making them ideal for industrial and commercial applications where reliability matters.

The jb JFT series is a compact, high-performance solution designed to meet these exact needs. Built with metallized polypropylene film, the JFT capacitor offers self-healing properties, low dissipation factor, and compliance with IEC 60384-14 (Class X1).

Key Benefits of Using the JFT X1 Capacitor

✔ Compact size — starting at just 13 × 11 × 5 mm, ideal for space-constrained designs 

 ✔ Rated for 300VAC and 440VAC 

 ✔ Capacitance range from 0.0022μF to 4.7μF 

 ✔ Operating temperature from -55°C to +105°C 

 ✔ Insulation resistance ≥ 15,000 MΩ (for C ≤ 0.33μF)

 ✔ Self-healing construction for long-term reliability

Where to Use It?

The JFT series is commonly used in:

• AC EMI input filters
• Switched-mode power supplies (SMPS)
• LED drivers and ballasts
• HVAC controllers
• Industrial automation equipment
• Chargers, adapters, and smart home devices

Why Not Just Use a Ceramic Capacitor?

While ceramic capacitors are compact, they usually lack safety certification and cannot withstand high surge voltages. The JFT X1 capacitor, in contrast, offers:

Feature	JFT X1 Capacitor	Ceramic Capacitor
EMI Suppression	Excellent	Moderate
Surge Handling	Up to 4kV	Limited
Safety Certification	Yes (Class X1)	No
Fail-Safe Design	Self-healing	Risk of short circuit
Long-Term Reliability	High	Medium

Learn More

Want to see this capacitor in action? Check out our video demonstration above or download the official datasheet below:

• View Product Page
• Download Datasheet (PDF)

Final Thoughts

If you're looking for a space-saving, safety-certified solution to suppress EMI in your AC applications, the jb JFT X1 film capacitor is an excellent choice. Its proven performance and compact size make it ideal for both new designs and replacements in existing systems.

Contact Us

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

Explore CBB60, CBB61 & MPP Capacitors for AC Applications

When designing AC-powered systems, selecting the right capacitor ensures efficiency, durability, and consistent performance. In this article, we’ll explore the differences between jb’s cbb60, cbb61, and mpp capacitors—and how each fits specific AC applications.

CBB60, CBB61, and MPP: What's the Difference?

All three types are designed for AC operation, but with distinct strengths. Here's a quick comparison:

Model	Application	Case Type	Capacitance	Voltage
cbb60	Motor run (pumps, washing machines)	Round plastic	1–100μF	250/450VAC
cbb61	Fan motors, compact appliances	Square plastic	1–20μF	250/450VAC
mpp	AC filtering, PFC circuits	Film (metalized polypropylene)	Customizable	250–630VAC

Why Use jb’s MPP Capacitors in AC Circuits?

jb’s mpp capacitors are built for low loss, high insulation resistance, and long life in high-frequency AC circuits. These are commonly used in:

• Ballasts and lighting systems
• Power factor correction (PFC)
• Industrial filtering units

With excellent self-healing properties and stable electrical behavior, they’re a trusted choice for demanding applications.

Designers Trust jb for AC Capacitor Solutions

• 100% electrical testing on all units
• Stable dielectric performance under thermal stress
• Flexible mounting and wiring options
• Globally recognized manufacturing quality

Download Technical Datasheets

Click below to access detailed product specifications and mechanical drawings:

• CBB60 Datasheet
• CBB61 Datasheet
• MPP Product Page

Need Help Selecting the Right Capacitor?

We’re here to help. jb offers expert advice, global support, and a full product lineup for every AC capacitor need. Discover our solutions now:

jb AC Capacitors Overview

Contact Us

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

Inside jb Capacitors: A Visual Tour of Our Headquarters – Celebrating 45 Years of Excellence

Curious about where your capacitors come from?

This visual walkthrough offers a unique perspective on the jb Capacitors headquarters — where precision engineering meets efficient teamwork. In 2025, we’re proud to celebrate our 45th anniversary, marking over four decades of innovation and reliability in the passive components industry. jb Capacitors has supported thousands of global B2B clients with high-quality aluminum electrolytic capacitors, film capacitors, and trimming potentiometers.

A Place Where Process Meets People

Take a closer look at how our daily office operations contribute to product stability and service excellence. From organized product shelves to quiet work zones, every part of our workplace is designed to support long-term relationships with engineers and procurement teams worldwide. Powered by 45 years of proven expertise, our culture is the foundation of consistent quality.

• Clean, professional office layout
• Hands-on coordination across departments
• Strong communication culture and team accountability

Our space reflects our values: consistency, transparency, and customer focus — three pillars that define our reputation as a capacitor supplier.

Why This Tour Matters

Choosing a capacitor partner isn't just about datasheets. This video helps procurement specialists and design engineers gain confidence in who we are and how we work — beyond the specs. Celebrate 45 years of excellence with us.

▶️ Watch now to see how we work — and why companies across Europe, North America, and Asia continue to trust jb Capacitors.

Visit Our Official Site

To explore our full product lines or request samples, visit:
www.jbcapacitors.com

Email: info@jbcapacitors.com

Compact and Stable: JBR Series Trimmers for Circuit Tuning

 

Modern electronics demand components that are both space-saving and dependable. As circuit boards become more compact and applications more demanding, the need for reliable trimming potentiometers is greater than ever.

The JBR Series from jb Capacitors addresses this challenge by offering trimmers that are both physically compact and electrically stable.

1. Compact Designs for Space-Constrained Applications

Whether you're working with handheld devices, communication modules, or IoT hardware, board space is always at a premium. The JBR-065 model, in particular, is designed with this challenge in mind. With a miniature footprint and top-adjust design, it fits easily into tight layouts while still delivering precise tuning performance.

Common applications include:

• Wireless transmitters and receivers

• Medical devices with limited enclosure space

• Consumer gadgets that require fine tuning

2. Stable Electrical Performance Over Time

Stability is just as important as size. The JBR-3309, a sealed trimmer with a solid general-purpose design, offers consistent resistance values even after repeated adjustments and long-term use. It resists moisture and dust, making it a dependable choice for high-humidity environments and field-deployed electronics.

Key features across the series:

• Tight resistance tolerance

• Low rotational torque for easier adjustment

• Excellent aging characteristics

3. Built for Real-World Engineering Needs

The JBR series is designed with actual engineering challenges in mind:

• Available in multiple resistance values (from 10Ω to 2MΩ)

• Through-hole mounting for mechanical reliability

• Top and side adjustment options depending on layout needs

• Up to 200 cycles of mechanical adjustment life

These trimmers help engineers fine-tune everything from offset voltages in analog circuits to gain controls in signal processing modules.

Need the Specs?

We’ve made it easy to compare the full JBR series and access datasheets for each model:

• JBR-065 Datasheet (PDF)

• JBR-3309 Datasheet (PDF)

• JBR-3540 Datasheet (PDF)

Conclusion

From compact size to long-term stability, the JBR series trimmer potentiometers offer an ideal solution for modern circuit tuning. Their performance and flexibility make them an excellent choice for both design engineers and production teams alike.

Want to explore more? Visit the full series here →
👉 jbcapacitors.com/product-category/trimming-potentiometers/