High-Performance Ceramic Fuses Manufacturer | HRC & Industrial Grade
TONFUL Electric is a premier manufacturer of high-reliability ceramic fuses, engineered for demanding industrial, automotive, and high-power consumer electronics applications. Unlike standard glass fuses, our ceramic fuses feature high-density steatite bodies and high-purity quartz sand filling, providing exceptional High Rupture Capacity (HRC) and preventing catastrophic blowouts.
Available in industry-standard dimensions (such as 5x20mm, 6x30mm, and 10x38mm) and capable of handling up to 1000V AC/DC, TONFUL delivers uncompromising circuit protection. Whether you need Fast-Acting fuses for sensitive instrumentation or Slow-Blow variants for motor loads, our certified production lines ensure perfect precision, safety, and factory-direct scalability.
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Our Ceramic Fuses Range
Technical Specifications: High-Performance Ceramic Fuses
| Specification Property | Performance Standards / Parameters |
|---|---|
| Standard Dimensions (标准尺寸) | 5x20mm, 6x30mm, 10x38mm, 14x51mm (Custom sizes available) |
| Amperage Range (电流范围) | 0.1A to 30A (Cartridge type) / Up to 100A+ (Industrial cylindrical) |
| Voltage Rating (额定电压) | 250V, 500V, 600V, up to 1000V AC/DC |
| Breaking Capacity (分断能力) | High Rupture Capacity (HRC) – up to 1500A or higher |
| Tube Material (管体材质) | High-Density Steatite Ceramic (Explosion-proof & Heat-resistant) |
| End Caps / Contacts (端帽材质) | Nickel-plated Brass / Silver-plated Copper |
| Time-Current Characteristic (熔断特性) | Fast-Acting (F) / Time-Lag / Slow-Blow (T) |
| Filler Material (填充介质) | High-Purity Quartz Sand (For rapid arc quenching) |
| Quality Certification (认证标准) | UL, cULus, VDE, CCC, CE, RoHS compliant |
Why Choose TONFUL Ceramic Fuses
Exceptional High Rupture Capacity (HRC)
Unlike standard glass fuses, TONFUL ceramic fuses are filled with specialized high-purity quartz sand. When a severe short circuit occurs, this sand rapidly quenches the electrical arc and absorbs the intense heat, allowing the fuse to safely interrupt massive fault currents (up to 1500A or higher) without shattering.
Explosion-Proof Ceramic Housing
We utilize high-density steatite ceramic for our fuse bodies. This industrial-grade material offers superior thermal stability and mechanical strength, preventing the fuse from exploding or melting during catastrophic electrical overloads, thereby protecting your expensive equipment and surrounding circuitry.
Precision Melting Characteristics
Every application is unique. We manufacture both Fast-Acting (F) fuses, designed to blow instantly to protect highly sensitive ICs and semiconductors, and Slow-Blow / Time-Lag (T) fuses, engineered to withstand harmless inrush currents from motor startups and transformers without nuisance tripping.
Global Safety Certifications
A fuse is a critical life-safety component. TONFUL ceramic fuses undergo rigorous automated testing for voltage drop and time-current characteristics. Our products proudly carry international safety approvals including UL, VDE, CCC, and CE, guaranteeing compliance for your export projects.
Extensive Customization & OEM Support
We go beyond off-the-shelf components. Whether you need specialized voltage ratings for solar/PV applications, custom amperage curves, or pre-welded axial pigtail leads for direct PCB wave soldering, our engineering team can provide rapid prototyping and OEM manufacturing.
Factory-Direct Pricing & Reliable Supply
Operating highly automated stamping and assembly lines allows us to eliminate the middleman. TONFUL delivers premium OEM-grade circuit protection at highly competitive wholesale prices, backed by a robust supply chain to ensure your production lines never experience downtime.
Professional Selection Guide
Step 1: Determine the Physical Dimensions
Identify the exact size required by your fuse holder or PCB clips. The most common metric sizes are 5x20mm and 6x30mm for consumer electronics, and 10x38mm or 14x51mm for heavy industrial and solar applications.
Step 2: Calculate the Amperage Rating (In)
Choose an amperage rating slightly higher than the normal operating current of your circuit (typically 125% to 135% of continuous load) to accommodate safe operation, while still low enough to blow during a genuine fault.
Step 3: Specify the Voltage Rating (Vn)
The fuse's voltage rating must be equal to or greater than the maximum voltage of the circuit it protects (e.g., 250V, 500V, or 1000V). Using a 250V fuse in a 500V circuit can result in dangerous electrical arcing across the blown element.
Step 4: Choose the Time-Current Characteristic
Select a Fast-Acting fuse if protecting sensitive electronic components like diodes or ICs. Select a Slow-Blow (Time-Delay) fuse for circuits containing motors, compressors, or large capacitors that generate a temporary power surge upon startup.
Step 5: Verify the Breaking Capacity
Assess the maximum potential short-circuit current your power grid could deliver. Ensure the ceramic fuse's High Rupture Capacity (HRC) exceeds this value to prevent the fuse body from physically shattering under extreme stress.
Step 6: Check Lead Configurations
Decide how the fuse will be installed. Choose standard cartridge fuses if using panel-mount or inline fuse holders. If the fuse will be directly soldered to a printed circuit board, specify models with pre-welded axial pigtail leads.
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MORE THAN JUST A CERAMIC FUSE MANUFACTURER
Service Consultation
Whether your Ceramic Fuse requirements are straightforward or complex, our team provides expert advice and technical consultation. For more intricate projects, we offer in-depth engineering support to ensure optimal product selection and application, guaranteeing safety and efficiency in your electrical systems.
Product Recommendations
Unsure which Ceramic Fuse suits your system? Our specialists provide free, customized recommendations based on your specific operational and environmental requirements, ensuring you get the perfect fit for your electrical protection needs.
Installation Support
Need help with installation? Our technical team is available to answer your questions or provide hands-on support. For larger projects, we can even dispatch an engineer to your site for on-the-ground assistance, ensuring your fuses are integrated correctly and function seamlessly within your electrical network.
Logistics Support
If you lack a reliable freight forwarder, we can arrange transportation from our factory to your project site at no extra cost. Our logistics team ensures timely and secure delivery to keep your project on schedule, minimizing downtime and delays.
Frequently Asked Questions
We have compiled some common questions from our clients. If your question isn’t included here, our customer service is always available to help. We’d love to talk with you.
Q1: What is the main difference between a ceramic fuse and a glass fuse?
The primary difference is their breaking capacity and thermal resistance. Glass fuses are transparent (making it easy to see if they are blown) but have a low breaking capacity, making them suitable only for low-current appliances. Ceramic fuses are opaque, filled with sand, and can handle massive short-circuit currents (High Rupture Capacity) without exploding, making them essential for high-power and industrial applications.
Q2: What does the sand inside a ceramic fuse do?
The white powder inside is high-purity quartz sand. When a severe short circuit melts the metal element, an intense electrical arc is formed. The sand immediately absorbs the heat and melts into glass, rapidly quenching the arc and preventing the fuse housing from catching fire or bursting.
Q3: Can I replace a blown ceramic fuse with a glass fuse of the same amperage?
No, it is highly dangerous. If the equipment manufacturer specified a ceramic fuse, it means the circuit has the potential for a high-energy short circuit. A glass fuse lacks the necessary breaking capacity and could shatter violently, causing a fire or destroying the equipment.
Q4: What do the letters "F" and "T" mean on the fuse body?
These denote the Time-Current Characteristic. “F” stands for Fast-Acting (from the German word ‘Flink’), which blows instantly upon overload. “T” stands for Time-Lag or Slow-Blow (from the German word ‘Träge’), which tolerates temporary power surges like motor startups without blowing.
Q5: Do you offer ceramic fuses with pre-attached wires for PCB mounting?
Yes. We manufacture axial leaded ceramic fuses (with wire pigtails welded to the end caps). This allows for direct wave soldering onto printed circuit boards without the need for additional, bulky fuse holders.
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