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Product Detailed Parameters
- Description：FERRITE BEAD 300 OHM 1206 1LN
- Series：WE-CBF
- Mfr：Würth Elektronik
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：1
- Impedance @ Frequency：300 Ohms @ 100 MHz
- Current Rating (Max)：3A
- DC Resistance (DCR) (Max)：60mOhm
- Ratings：-
- Operating Temperature：-55°C ~ 125°C
- Package / Case：1206 (3216 Metric)
- Mounting Type：Surface Mount
- Height (Max)：0.051" (1.30mm)
- Size / Dimension：0.126" L x 0.063" W (3.20mm x 1.60mm)
- Features：-
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Overview
The Würth Elektronik 742792121 is a WE-CBF series surface-mount ferrite bead designed for signal line EMI suppression. It features a 1206 (3216 metric) package with dimensions of 3.20mm x 1.60mm and a maximum height of 1.30mm. The component provides an impedance of 300 Ohms at 100 MHz and supports a rated current of 3A. Its maximum DC resistance is 60 milliohms. It operates within a temperature range of -55°C to +125°C.
Feature Summary
- Provides high attenuation for single signal lines in the 1206 footprint
- Supports high continuous current handling up to 3A
- Complies with AEC-Q200 automotive qualification standards
Applications
- High-speed data line filtering
- Automotive electronic circuit protection
- General EMI suppression on signal traces
Procurement Notes
Verify the specific suffix against the manufacturer datasheet to confirm exact impedance tolerance and packaging configuration. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Confirm that the delivered components match the AEC-Q200 qualification status required for your specific application environment.
Selection Notes
Select this component when a 1206 footprint is required for signal integrity management. The 3A rating makes it suitable for power-adjacent signal lines or low-power digital interfaces. Verify that the 300 Ohm impedance at 100 MHz aligns with the target noise frequency spectrum. Consider the 60 milliohm DCR impact on voltage drop if the signal line carries significant DC current.
Part Context
This part belongs to the WE-CBF family, which focuses on compact SMD ferrite beads. The series offers various impedances and current ratings across different case sizes. The 742792121 specifically addresses the need for robust signal line filtering in space-constrained designs requiring automotive reliability.
Replacement Considerations
Consult official substitution lists for equivalent WE-CBF parts with matching 1206 dimensions and similar impedance characteristics. Cross-reference AEC-Q200 qualified alternatives from other manufacturers only if they meet the 3A current and 300 Ohm @ 100 MHz specifications.
