Ferrite coil WL1220

ferrite corehigh-frequencyRF

Product overview
WL1220 ferrite-core ignition coils are electromagnetic components engineered to generate controlled high-voltage pulses for ignition and pulse-generation systems. The ferrite core concentrates magnetic flux to provide high voltage output in a compact footprint. Typical construction comprises a ferrite core, primary and secondary enameled copper windings, insulation layers and protective housing.

How it works
The coil operates by electromagnetic induction: current through the primary winding creates a magnetic field concentrated by the ferrite core. Interrupting the primary current causes the collapsing field to induce a high voltage in the secondary winding (many turns), producing a pulse suitable for spark or ignition. Ferrite materials respond rapidly to flux changes and are suitable for kHz–MHz frequency ranges.

Key features

• Compact footprint (typical length 20 mm) with high magnetic efficiency
• Fast response and suitability for high-frequency operation (kHz–MHz)
• Low core losses and optimized electrical efficiency
• High insulation resistance and stable output under industrial conditions
• Customizable winding ratios, voltage rating, frequency range and mechanical options for OEM integration
• Optional encapsulation: varnish, epoxy or protective coating

Product composition

• Ferrite core (magnetic rod)
• Primary winding (enameled copper)
• Secondary winding (multi-turn enameled copper)
• Insulation layers and high-voltage insulation
• Protective housing and optional encapsulation

Representative technical data
Item: Description
Ferrite coil conductor: Enameled copper wire
Wire diameter: 0.2 mm (AWG options available)
Winding type: Single-layer round or sectional winding
Core material: Ferrite magnetic rod
Footprint length: 20 mm
Encapsulation: Optional varnish, epoxy or coating
Mounting: Through-foot or custom mounting

Electrical specifications (typical)
Inductance range: 0.1 µH – 100 µH (customizable)
Inductance tolerance: ±2%, ±5%, ±10%
DC resistance (DCR): Custom per design
Q factor: High, optimized for selected frequency range
Self-resonant frequency: Application-dependent, typically high
Operating frequency: kHz to MHz range
Rated current: Defined per customer design
Insulation resistance: ≥100 MΩ (typical)

Applications

• Automotive ignition modules (gasoline engines, motorcycles, small engines)
• Industrial burners, boilers and gas ignition systems
• Electronic ignition controls, automation and pulse-generation equipment
• Aerospace, laboratory and medical devices requiring compact high-voltage pulses

Advantages

• Compact and lightweight for limited-installation-space applications
• Excellent high-frequency magnetic performance with reduced losses
• Fast transient response and stable high-voltage output
• High degree of customization for OEM projects

Limitations

• Ferrite materials are brittle and require mechanical protection and vibration mitigation
• Less suited to very high-power applications requiring larger magnetic cores
• Continuous high-frequency/high-power operation may require thermal management

Troubleshooting guidance (common faults)

• No high-voltage output: check windings, power supply, insulation and control electronics
• Poor spark: inspect winding ratio, possible core saturation or insufficient input current
• Overheating: verify load, operating frequency and improve cooling as needed
• Intermittent operation: inspect for loose connections, vibration damage or insulation degradation
• Short circuit: test for insulation breakdown between windings and repair or replace

Video / media
An associated product video demonstrates WL1220 features and operation (hosted on a major video platform).

FAQ (selected)

• What is it used for? — Generation of high-voltage pulses for ignition systems in automotive, industrial and electronic devices.
• How does it work? — Electromagnetic induction: primary winding creates magnetic field in ferrite core; interruption induces high voltage in secondary winding.
• Can it be customized for OEM projects? — Yes; size, output voltage, winding ratio, core material, frequency, connector and mounting can be customized.
• How to select the right coil? — Consider output voltage, input voltage, operating frequency, power/duty cycle, installation space and environment.
• How to extend service life? — Operate within rated electrical/thermal limits, ensure heat dissipation, and protect from moisture and vibration.

Model specifications

• Model series: WL1220 family (WL1220)
• Core material: Ferrite magnetic rod
• Typical footprint length: 20 mm
• Wire: Enameled copper, typical diameter 0.2 mm (AWG options available)
• Winding: Single-layer round or sectional; custom winding available
• Inductance: 0.1 µH – 100 µH (customizable)
• Inductance tolerance options: ±2%, ±5%, ±10%
• Operating frequency: kHz to MHz
• Insulation resistance: ≥100 MΩ
• Encapsulation options: Varnish, epoxy or coating
• Mounting: Through-foot or custom mounting