1537R-74H

Overview

The Delevan 1537R-74H is a fixed axial leaded RF inductor with a nominal inductance of 91 µH and a tolerance of ±3%. It features an unshielded molded construction with a maximum DC resistance of 4.3 Ohms and a minimum quality factor of 55 at the rated inductance. The component supports a maximum current rating of 154 mA and exhibits a self-resonant frequency of 10.5 MHz. Designed for through-hole PCB mounting, it operates within a temperature range of -55 °C to +125 °C.

Feature Summary

• Unshielded molded coil design suitable for general RF applications
• Axial leaded termination style for standard PCB mounting
• High Q-factor performance for efficient signal processing

Applications

• RF circuit filtering
• Impedance matching networks
• Tuning circuits in radio frequency equipment

Procurement Notes

Verify the specific suffix 'H' against official API Delevan documentation to confirm terminal plating and material specifications. Ensure that the required inductance value and current rating align with the circuit design constraints before procurement. Cross-reference the manufacturer part number with authorized distributors to confirm active lifecycle status and availability.

Selection Notes

Select this component when a high-inductance value near 91 µH is required for RF applications with moderate current handling up to 154 mA. Consider the unshielded nature of the device regarding potential magnetic interference in dense layouts. Verify that the axial package dimensions fit the target PCB footprint and that the operating temperature range meets environmental requirements.

Part Context

This component belongs to the 1537R series of molded unshielded RF coils manufactured by API Delevan. The series offers various inductance values tailored for radio frequency applications. The 1537R-74H specifically provides higher inductance compared to lower-numbered variants in the same family, maintaining consistent physical dimensions and mounting characteristics across the product line.

Replacement Considerations

Direct substitutes include other 1537R series variants such as 1537R-70H or 1537R-72J if different inductance values are acceptable. Generic replacements must match the 91 µH nominal value, 4.3 Ohm max DC resistance, and axial leaded form factor to ensure mechanical and electrical compatibility.