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Product Detailed Parameters
- Description：FIXED IND 240UH 115MA 7.8 OHM TH
- Series：1537R
- Mfr：Delevan
- Package：Tape & Reel (TR)
- Type：Molded
- Material - Core：Iron
- Inductance：240 µH
- Tolerance：±1%
- Current Rating (Amps)：115 mA
- Current - Saturation (Isat)：-
- Shielding：Unshielded
- DC Resistance (DCR)：7.8Ohm Max
- Q @ Freq：65 @ 790kHz
- Frequency - Self Resonant：5.9MHz
- Ratings：-
- Operating Temperature：-55°C ~ 105°C
- Inductance Frequency - Test：790 kHz
- Mounting Type：Through Hole
- Package / Case：Axial
- Supplier Device Package：-
- Size / Dimension：0.156" Dia x 0.375" L (3.96mm x 9.53mm)
- Height - Seated (Max)：-
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Overview
The Delevan 1537R-94F is a molded, unshielded axial lead RF inductor from the 1537/R series. It features an inductance of 240 µH with a tolerance of 5% and a maximum DC resistance of 7.8 Ohms. The component supports a maximum DC current of 115 mA and achieves a minimum Q factor of 65 at 1 MHz. Its self-resonant frequency is 3.5 MHz. Designed for PCB mount applications, it measures 9.53 mm in length and 3.96 mm in diameter.
Feature Summary
- Molded construction provides mechanical stability for axial lead mounting
- Unshielded design suitable for standard RF circuit layouts
- Established reliability specifications for consistent performance
Applications
- RF signal processing circuits
- Impedance matching networks
- Filtering applications in radio frequency systems
Procurement Notes
Verify the specific electrical parameters against the official manufacturer datasheet before integration. Confirm that the 240 µH inductance and 115 mA current rating align with your circuit requirements. Ensure the axial lead form factor fits your PCB layout constraints. Check for RoHS compliance status if required by your manufacturing standards.
Selection Notes
Select this component when a high-inductance value is required within the 1537/R series family. The unshielded configuration is appropriate where magnetic interference is not a primary concern. Consider the physical dimensions and axial leads for through-hole assembly processes. Evaluate the self-resonant frequency to ensure it meets the operational bandwidth needs of the target application.
Part Context
This part belongs to the Delevan 1537/R series of fixed RF inductors. The series offers various inductance values ranging from low microhenries to hundreds of microhenries. Components in this line share common physical dimensions and mounting styles, facilitating standardized design approaches across different frequency ranges and circuit requirements.
Replacement Considerations
Cross-reference with other 1537/R series variants such as 1537R-94J or 1537R-94G for similar form factors. Verify that substitute parts match the 240 µH inductance and current handling capabilities. Ensure compatibility with existing PCB footprints and assembly processes.
