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Product Detailed Parameters
- Description：FERRITE BEAD 120 OHM 1812 1LN
- Series：MI
- Mfr：Laird-Signal Integrity Products
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：-
- Number of Lines：1
- Impedance @ Frequency：120 Ohms @ 100 MHz
- Current Rating (Max)：1.5A
- DC Resistance (DCR) (Max)：55mOhm
- Ratings：-
- Operating Temperature：-40°C ~ 125°C
- Package / Case：1812 (4532 Metric)
- Mounting Type：Surface Mount
- Height (Max)：0.065" (1.65mm)
- Size / Dimension：0.177" L x 0.126" W (4.50mm x 3.20mm)
- Features：-
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Overview
The MI1812K121R-00 is a monolithic ferrite bead designed for power and signal line filtering in the 1812 (4532 Metric) surface-mount package. It provides an impedance of 120 Ohms at 100 MHz with a maximum DC resistance of 55 milliohms. The component supports a rated current of 1.5 Amperes and operates within a temperature range of -40°C to +125°C. Physical dimensions are 4.50mm in length, 3.20mm in width, and a maximum height of 1.40mm. This single-line filter is intended for EMI suppression applications.
Feature Summary
- Monolithic construction for reliable high-frequency noise attenuation
- Designed for simultaneous power and signal line filtering
- Compact surface-mount footprint suitable for dense PCB layouts
Applications
- Power supply input filtering
- High-speed digital signal line protection
- EMI suppression in portable electronic devices
Procurement Notes
Verify RoHS compliance status as older manufacturing runs may differ from current specifications. Confirm that the 1812 package dimensions align with your board design constraints. Ensure the 1.5A current rating meets your circuit requirements under all operating conditions. Check for lead-free soldering compatibility if required by your assembly process.
Selection Notes
Select this component when a 120 Ohm impedance at 100 MHz is required for a single-line application. The 1.5A current rating makes it suitable for moderate power rails. Consider the 1812 package size relative to available board space. Compare DCR values against other options to minimize voltage drop in sensitive circuits.
Part Context
This part belongs to Laird-Signal Integrity Products' MI series of ferrite beads. The series offers various impedances and current ratings in standard packages. The MI1812K121R-10 is the active replacement for this discontinued model, maintaining similar electrical characteristics while ensuring continued availability.
Replacement Considerations
The MI1812K121R-10 is the direct replacement for the MI1812K121R-00. Verify that the replacement maintains the same 120 Ohm impedance and 1.5A rating. Ensure the package dimensions remain identical for board compatibility.
