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Product Detailed Parameters
- Description：FERRITE BEAD 120 OHM 1812 1LN
- Series：WE-CBF
- Mfr：Würth Elektronik
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：1
- Impedance @ Frequency：120 Ohms @ 100 MHz
- Current Rating (Max)：300mA
- DC Resistance (DCR) (Max)：300mOhm
- Ratings：AEC-Q200
- Operating Temperature：-55°C ~ 125°C
- Package / Case：1812 (4532 Metric)
- Mounting Type：Surface Mount
- Height (Max)：0.067" (1.70mm)
- Size / Dimension：0.177" L x 0.126" W (4.50mm x 3.20mm)
- Features：Automotive
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Overview
The Würth Elektronik 7427925 is a surface-mount EMI suppression ferrite bead from the WE-CBF series. It provides signal line filtering with an impedance of 120 Ohms at 100 MHz and a rated current of 300 mA. The component utilizes a 1210 (3225 metric) package, featuring a maximum DC resistance of 200 milliohms. It operates within a temperature range of -55°C to +125°C and meets AEC-Q200 automotive standards.
Feature Summary
- Provides electromagnetic interference suppression for high-speed signal lines
- Complies with AEC-Q200 automotive qualification standards
- Utilizes a compact surface-mount design for automated assembly
Applications
- Automotive electronic circuit protection
- High-speed digital signal line filtering
- EMI suppression in consumer electronics
Procurement Notes
Verify the specific impedance value against official datasheets, as distributor listings may vary between 70 Ohms and 120 Ohms. Confirm the package dimensions match the required 1210 footprint. Ensure the selected variant satisfies AEC-Q200 requirements if used in automotive contexts. Cross-reference manufacturer part numbers to avoid confusion with similar WE-CBF series components.
Selection Notes
Select this component when designing circuits requiring robust EMI filtering for signals up to 100 MHz. The 300 mA current rating suits moderate power applications. The low DC resistance minimizes voltage drop across the filter. Verify thermal performance within the specified operating range to ensure reliability under load conditions.
Part Context
This ferrite bead belongs to the WE-CBF family, designed for SMT mounting. It serves as a passive component for noise attenuation in electronic systems. The series offers various impedance values and package sizes to accommodate different PCB layout constraints and filtering requirements.
Replacement Considerations
Consult official documentation for direct substitutes. Similar WE-CBF parts with adjusted impedance or current ratings may serve as alternatives. Verify package compatibility before substitution.
