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108R-393J
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Product Detailed Parameters
- Description：FIXED IND 39UH 38MA 17 OHM SMD
- Series：108R
- Mfr：Delevan
- Package：Tape & Reel (TR)
- Type：-
- Material - Core：Iron
- Inductance：39 µH
- Tolerance：±5%
- Current Rating (Amps)：38 mA
- Current - Saturation (Isat)：-
- Shielding：Unshielded
- DC Resistance (DCR)：17Ohm Max
- Q @ Freq：30 @ 2.5MHz
- Frequency - Self Resonant：10MHz
- 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-393J is a fixed power inductor with an inductance of 39 µH and a tolerance of ±5%. It features a maximum DC current rating of 38 mA and a maximum DC resistance of 17 Ohms. The component utilizes an unshielded design with a nonstandard, two-lead surface mount package. Its physical dimensions are standardized for SMT applications, suitable for general power filtering tasks within its specified electrical limits.
Feature Summary
- Unshielded wirewound construction for standard power applications
- Surface mount termination style for automated PCB assembly
- Fixed inductance value optimized for specific circuit filtering
Applications
- General purpose power supply filtering
- DC-DC converter input/output stages
- Signal conditioning circuits requiring moderate inductance
Procurement Notes
This component is officially discontinued and no longer manufactured by API Delevan. Verification of availability should focus on surplus distributors or secondary market sources. Ensure that any sourced units are genuine and have not suffered from shelf-life degradation due to prolonged storage conditions prior to purchase.
Selection Notes
Engineers must account for the low current rating of 38 mA when designing circuits, as exceeding this limit may cause thermal failure or inductance drift. The high DC resistance of 17 Ohms impacts efficiency; therefore, this part is suitable only for low-power applications where voltage drop across the inductor is acceptable within the system budget.
Part Context
The 108R series represents a line of fixed surface mount inductors from API Delevan. These components were designed for compact electronic assemblies requiring reliable magnetic shielding-free solutions. The 108R-393J specifically targets applications needing 39 µH inductance in a small form factor, preceding modern high-current SMD alternatives.
Replacement Considerations
Public confirmed substitute part numbers include TDK NLV25T-390J-EF. Engineers should verify that replacement components match the required inductance, current handling capabilities, and physical footprint constraints before integration into existing designs.
