1537R-88H

Overview

The Delevan 1537R-88H is a fixed axial leaded RF inductor from the 1537/R series. It features an unshielded molded construction with a phenolic core, designed for through-hole PCB mounting. The component provides an inductance of 180 µH with a tight ±3% tolerance. It supports a maximum DC current of 123 mA and exhibits a maximum DC resistance of 6.75 Ohms. Key electrical characteristics include a minimum Q factor of 65 at 790 kHz and a self-resonant frequency of 8.5 MHz. The physical dimensions are 3.96 mm in diameter by 9.53 mm in length.

Feature Summary

• Unshielded molded design suitable for radio frequency applications
• Axial leaded termination style for standard through-hole mounting
• High precision inductance tolerance for stable circuit performance

Applications

• Radio frequency signal processing circuits
• Impedance matching networks
• Filtering stages in communication equipment

Procurement Notes

Verify compliance with MIL-PRF-39010 standards when sourcing this component, as indicated in related series documentation. Confirm that the specific part number matches the required 180 µH value and 3% tolerance. Ensure the supplier provides official datasheets to validate the 123 mA current rating and 6.75 Ohm DC resistance specifications before integration into production designs.

Selection Notes

Select this component for applications requiring high stability and precise inductance values in RF environments. The unshielded nature requires careful layout consideration to minimize electromagnetic interference coupling. Compare the 123 mA current limit against peak circuit loads to ensure reliable operation without saturation or excessive heating during continuous duty cycles.

Part Context

This part belongs to the Delevan 1537/R series of general-purpose RF inductors. These components are characterized by their robust molded construction and axial leads, making them suitable for legacy and modern through-hole designs. The series offers various inductance values while maintaining consistent physical dimensions and electrical performance profiles for RF filtering and tuning.

Replacement Considerations

Direct substitutes within the same series include other 1537R variants with different inductance values but identical form factors. Cross-referencing with established reliability (ER) series parts may be possible if higher current ratings are acceptable, though electrical parameters will differ significantly.