Feed-Through Capacitor
Provides the electrical feedthrough path required by the magnetron assembly.
Ceramic Capacitor for Microwave Oven | 10kV Magnetron EMI Filter
A feedthrough capacitor is a specially structured capacitor commonly used for filtering and decoupling in high-frequency circuits. Its main feature is the transmission of signals or power through its central conductor, while utilizing the capacitive characteristics to suppress high-frequency noise. Zhengqiang Group manufactures 70% of the feedthrough capacitors in China
Our ceramic capacity features at:
1.Prevent leakage of unwanted radiation in broadband applications
2.Excellent high-frequency characteristics
3.Flame retardant rating equivalent to UL94V-1
4.Wide temperature range for different application
5.Energy-saving and environmental friendly
Application :
General microwave oven magnetron
Variable frequency microwave oven magnetron
Our ceramic capacity features at:
1.Prevent leakage of unwanted radiation in broadband applications
2.Excellent high-frequency characteristics
3.Flame retardant rating equivalent to UL94V-1
4.Wide temperature range for different application
5.Energy-saving and environmental friendly
Application :
General microwave oven magnetron
Variable frequency microwave oven magnetron
Products details
Microwave Magnetron Filter Component
10kV Feedthrough EMI Filter for Microwave Oven Magnetrons
10kV Feedthrough EMI Filter for Microwave Oven Magnetrons
Our ceramic capacitor for microwave oven magnetron applications is a
10kV feedthrough EMI filter designed for high-frequency filtering,
electromagnetic interference suppression and stable integration into
standard and variable-frequency magnetron assemblies.
10.0kV Rated Voltage
380–530pF × 2
High-Frequency Filtering
UL94V-0 Equivalent
ODM Support
380–530pF × 2
High-Frequency Filtering
UL94V-0 Equivalent
ODM Support
Typical Applications
- General microwave oven magnetron
- Variable-frequency microwave oven magnetron
- Feedthrough EMI filtering
- High-frequency magnetron electrical assemblies
Final dimensions and electrical requirements should be confirmed according
to the target magnetron design, drawing or approved sample.
Product Overview
What Is a Magnetron Ceramic Feedthrough Capacitor?
A ceramic capacitor for microwave oven magnetron applications
is a feedthrough filtering component installed in the magnetron electrical assembly.
It allows the required electrical connection to pass through the assembly while
helping filter unwanted high-frequency noise and suppress electromagnetic interference.
In a typical microwave magnetron system, the functional relationship can be understood as:
Filter Component
Supports high-frequency filtering and suppression of unwanted interference.
Magnetron
Integrates into standard or variable-frequency microwave oven magnetron systems.
Technical Specifications
Standard Type vs Variable-Frequency Type
The following specifications are based on Zhengqiang’s current product catalogue.
Final requirements should be confirmed against the target magnetron specification.
| Characteristic | Standard Type | Variable-Frequency Type |
|---|---|---|
| Rated Voltage (Edc) | 10.0kV | 10.0kV |
| AC Withstand Voltage (Erms) | 10.0kV [50Hz, 1min] | 10.0kV [20–30kHz, 1min] |
| Insulation Resistance | 10000MΩ min. | 10000MΩ min. |
| Nominal Capacitance | 380–530pF × 2 [1V, 1kHz] | 380–530pF × 2 [1V, 1kHz] |
| tanδ (Loss Tangent) | 1% max. | 1% max. |
| Temperature Characteristics | E (-55~+22%) | E (-55~+22%) |
| Temperature Range | -30~+120 °C | -30~+120 °C |
Electrical values, dimensions and assembly requirements should be verified
according to the customer’s magnetron design, technical specification or approved sample.
Characteristics
Key Characteristics of the Magnetron Ceramic Capacitor
Wide-Band Interference Suppression
Helps prevent leakage of unused radiation in wide frequency bands and
supports electromagnetic interference control in the magnetron assembly.
Excellent High-Frequency Characteristics
Designed for high-frequency filtering and decoupling in microwave oven
magnetron electrical circuits.
UL94V-0 Equivalent Flame Retardancy
Zhengqiang’s current product catalogue specifies a flame-retardant rating
equivalent to UL94V-0.
Wide Application Temperature Range
Suitable for application environments within the specified
-30 to +120 °C temperature range.
Applications
General and Variable-Frequency Microwave Magnetrons
General Microwave Magnetron
The standard type is designed for conventional microwave oven magnetron
electrical assemblies requiring feedthrough filtering and interference suppression.
Typical AC withstand condition:
10.0kV [50Hz, 1min].
Variable-Frequency Microwave Magnetron
The variable-frequency type is intended for inverter or variable-frequency
microwave magnetron designs.
Typical AC withstand condition:
10.0kV [20–30kHz, 1min].
Electrical Function
Why EMI Filtering Matters in a Microwave Magnetron
Microwave magnetrons operate in a high-frequency electrical environment.
The feedthrough capacitor helps transmit the required electrical connection
while filtering unwanted high-frequency noise.
This makes the microwave magnetron capacitor part of the
magnetron’s electromagnetic interference control system rather than simply
a conventional ceramic capacitor.
For replacement or custom development, the capacitor should therefore be
evaluated together with the magnetron electrical design, installation geometry
and operating conditions.
For B2B sourcing, the ceramic capacitor for microwave oven
should be evaluated together with the magnetron type, rated voltage,
capacitance, mounting dimensions and operating conditions.
Engineering Review
What Information Should You Provide for a Custom Project?
To evaluate a custom or replacement
feedthrough capacitor for magnetron applications,
provide as much of the following information as possible.
Existing sample or reference model
2D drawing or dimensional specification
Standard or variable-frequency magnetron
Rated voltage and withstand requirements
Capacitance requirements
Estimated order quantity
ODM Workflow
From Sample Review to Stable Production
01
Requirement Review
Review sample, drawing, magnetron type and key electrical requirements.
02
Engineering Confirmation
Confirm critical dimensions, application conditions and product specifications.
03
Sample Evaluation
Evaluate the developed component against the target magnetron assembly.
04
Mass Production
Move to stable production after specification and sample approval.
Selection Guide
What Should Be Confirmed Before Ordering?
A magnetron feedthrough capacitor should not be selected only by external
appearance or physical dimensions.
- Confirm whether the magnetron is standard or variable-frequency type.
- Verify rated voltage and AC withstand requirements.
- Confirm nominal capacitance and circuit requirements.
- Check mounting dimensions and electrical interfaces.
- Confirm the required application temperature range.
- Use an approved sample or drawing for replacement projects.
FAQ
Frequently Asked Questions
What does a ceramic feedthrough capacitor do in a microwave magnetron?
It provides the required electrical feedthrough path while helping filter
unwanted high-frequency noise and suppress electromagnetic interference
in the magnetron electrical assembly.
What is the rated voltage of this magnetron ceramic capacitor?
The current standard and variable-frequency product specifications both
list a rated voltage of 10.0kV.
What capacitance range is available?
The current catalogue specification lists nominal capacitance of
380–530pF × 2 measured at 1V, 1kHz.
Can this product be used in variable-frequency microwave ovens?
Yes. Zhengqiang’s current product range includes both standard and
variable-frequency magnetron capacitor types.
Can Zhengqiang develop a replacement from an existing sample?
An existing sample, together with dimensional and electrical requirements,
can be used as part of the engineering evaluation for a custom ODM project.
What information should I send for engineering review?
Send the sample or drawing, magnetron type, critical dimensions,
electrical specifications, application conditions and estimated quantity.
Zhengqiang Ceramics
Custom Ceramic Components for Appliance Applications
Zhengqiang supports drawing-based ODM development of ceramic components for
microwave ovens, electrical assemblies and other appliance applications.
For a new microwave magnetron capacitor project or an alternative to an
existing component, send your sample, drawing and technical requirements
for engineering review.
Need a 10kV Ceramic Capacitor for Your Microwave Magnetron?
Send your drawing, existing sample or technical requirements for engineering review.
