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108-183H
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Product Detailed Parameters
- Description：FIXED IND 18UH 75MA 4.4 OHM SMD
- Series：108
- 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 108-183H is a surface-mount RF inductor designed for radio frequency applications. It features an unshielded construction with an 18 µH nominal inductance and a ±5% tolerance. The component has a maximum DC resistance of 4.4 Ohms and supports a maximum DC current of 75 mA. Electrical performance includes a minimum Q factor of 32 at 2.5 MHz and a self-resonant frequency of 21 MHz. The physical package measures 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height.
Feature Summary
- Unshielded SMD construction for RF circuit integration
- Stable inductance characteristics suitable for radio frequency environments
- Standard two-terminal surface mount termination
Applications
- Radio Frequency (RF) circuits
- Surface Mount Technology (SMT) PCB assembly
Procurement Notes
Verify the specific suffix designation when ordering, as variants such as 108-183JS exist with different tolerances or compliance statuses. Confirm RoHS compliance requirements against the specific part number variant selected. Check manufacturer discontinuation notices, as certain series within this family have been subject to end-of-life notifications. Ensure the selected packaging quantity aligns with production needs, as availability may vary by distributor.
Selection Notes
Select this component based on the required 18 µH inductance value and the 75 mA current rating constraints. The 4.4 Ohm DC resistance and 21 MHz self-resonant frequency define the operational limits for high-frequency filtering or matching networks. Consider the unshielded design implications regarding magnetic coupling in dense layouts compared to shielded alternatives.
Part Context
This component belongs to the Delevan 108 series of fixed RF inductors. It shares the same electrical core specifications with other variants like the 108R-183HS but differs in packaging style and tolerance ratings. The series is categorized under general-purpose RF inductors for surface mount applications.
Replacement Considerations
Public confirmed substitute: NLV25T-180J-EF (TDK).
FAQ
What is the self-resonant frequency of the 108-183H?
The self-resonant frequency is 21 MHz.
Is the 108-183H shielded?
No, the 108-183H is an unshielded inductor.
