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Product Detailed Parameters
- Description：FERRITE BEAD 120 OHM 1812 1LN
- Series：WE-CBA
- Mfr：Würth Elektronik
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Power Line
- Number of Lines：1
- Impedance @ Frequency：120 Ohms @ 100 MHz
- Current Rating (Max)：3A
- DC Resistance (DCR) (Max)：40mOhm
- 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：-
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Overview
The Würth Elektronik 782965121 is a surface-mount EMI suppression ferrite bead from the WE-CBA series, designed for automotive applications under AEC-Q200 qualification. It features an impedance of 120 ohms at standard test frequencies and supports a maximum DC current of 3 amperes. The component exhibits a low maximum DC resistance of 0.04 ohms with a tolerance of ±25%. Housed in an 1812 [4532 metric] package, it operates within a temperature range of -55°C to +125°C.
Feature Summary
- AEC-Q200 qualified for automotive reliability standards
- Low DC resistance minimizes power loss in signal lines
- High current handling capability for robust performance
- Compact SMD footprint suitable for dense PCB layouts
Applications
- Automotive electronic circuit protection
- EMI suppression in high-speed data lines
- Power supply output filtering
- Signal integrity enhancement in noisy environments
Procurement Notes
Verify the specific impedance value and current rating against the official datasheet before integration. Confirm that the AEC-Q200 certification status meets your project's automotive quality requirements. Ensure the 1812 package dimensions align with your PCB land pattern design. Check for any recent manufacturing updates or suffix changes that may affect compatibility.
Selection Notes
Select this component when automotive-grade reliability is required for EMI filtering. The 120-ohm impedance provides effective noise attenuation for specific frequency ranges. The 3A current rating suits moderate-power signal lines. Consider the low DCR for efficiency-sensitive designs. Evaluate thermal performance within the -55°C to +125°C operating range for harsh environment suitability.
Part Context
This part belongs to the WE-CBA series of surface-mount ferrite beads manufactured by Würth Elektronik. The series focuses on EMI suppression for sensitive electronic circuits. The 782965121 variant specifically targets automotive markets with its AEC-Q200 qualification. It complements other components in the manufacturer's passive filter portfolio.
Replacement Considerations
Consult official Wurth Elektronik documentation for verified cross-reference part numbers. Do not substitute based solely on impedance and package similarity without confirming current ratings and material specifications.
