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108R-183H
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Product Detailed Parameters
- Description：FIXED IND 18UH 75MA 4.4 OHM SMD
- Series：108R
- Mfr：Delevan
- Package：Tape & Reel (TR)
- Type：-
- Material - Core：Iron
- Inductance：18 µH
- Tolerance：±3%
- Current Rating (Amps)：75 mA
- Current - Saturation (Isat)：-
- Shielding：Unshielded
- DC Resistance (DCR)：4.4Ohm Max
- Q @ Freq：32 @ 2.5MHz
- Frequency - Self Resonant：21MHz
- Ratings：-
- Operating Temperature：-55°C ~ 125°C
- Inductance Frequency - Test：2.5 MHz
- Mounting Type：Surface Mount
- Package / Case：Nonstandard, 2 Lead
- Supplier Device Package：-
- Size / Dimension：0.100" L x 0.100" W (2.54mm x 2.54mm)
- Height - Seated (Max)：0.075" (1.91mm)
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Overview
The Delevan 108R-183H is an unshielded surface-mount RF inductor with a nominal inductance of 18 µH and a tolerance of ±3%. It features a maximum DC resistance of 4.4 Ohms and a rated current of 75 mA. The component utilizes a ferrite core and standard two-terminal SMD/SMT termination. Its physical dimensions are non-standard, designed for specific PCB mounting requirements within RF circuit applications.
Feature Summary
- Unshielded wirewound construction using a ferrite core
- Surface-mount design with standard two-terminal leads
- Fixed inductance value suitable for RF signal processing
Applications
- RF circuit filtering
- Impedance matching networks
- General-purpose RF signal conditioning
Procurement Notes
Verify the obsolete lifecycle status before procurement planning. Confirm that the non-standard package dimensions align with existing PCB footprints. Ensure the 75 mA current rating meets operational requirements. Check for available replacement components from the manufacturer or authorized distributors due to end-of-life conditions.
Selection Notes
Select this component only if the unshielded topology is acceptable for the electromagnetic interference environment. The 4.4 Ohm DC resistance must be compatible with the circuit's power loss constraints. Verify that the 18 µH inductance value matches the target frequency response. Consider thermal management as the small form factor limits heat dissipation capabilities.
Part Context
This part belongs to the Delevan fixed inductor family, specifically categorized under RF Inductors - SMD. It is distinct from shielded power inductors like the SP1812R series. The 108R designation indicates a specific unshielded form factor within the manufacturer's passive component portfolio.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete lifecycle status, direct replacements may require redesigning the PCB footprint to accommodate different package dimensions offered by alternative manufacturers.
