ER1840-111JR

Fixed Inductors Overview

The Delevan ER1840-111JR is an established reliability RF inductor from the ER1840 series, designed for through-hole PCB mounting. It features a molded construction with a phenolic plastic core and unshielded design. The component provides an inductance of 1.1 µH with a tolerance of ±5%. It supports a maximum DC current of 785 mA and has a maximum DC resistance of 400 mOhms. Electrical testing is conducted at 7.9 MHz, yielding a Q factor of 30, with a self-resonant frequency of 180 MHz. Physical dimensions are 4.75 mm in diameter and 11.1 mm in length. It operates within a temperature range of -55°C to 125°C.

Fixed Inductors Feature Summary

• Molded construction using phenolic plastic core material for structural stability
• Established reliability classification suitable for demanding RF applications
• Unshielded axial leaded design facilitating standard through-hole integration

Fixed Inductors Applications

• RF circuit filtering
• Impedance matching networks
• General purpose radio frequency signal processing

Fixed Inductors Procurement Notes

Verify compliance requirements as the component is not RoHS compliant. Confirm packaging specifications, typically supplied in reels. Ensure ordering quantities align with manufacturer minimums. Validate that the axial lead configuration matches the target PCB footprint. Check for specific military or aerospace qualification needs if applicable to the end application.

Fixed Inductors Selection Notes

Select this component when a 1.1 µH inductance value is required with high current handling capabilities up to 785 mA. The unshielded nature requires consideration for electromagnetic interference in dense layouts. The wide operating temperature range supports harsh environment deployment. Verify that the 400 mOhm DC resistance meets power loss constraints in the specific circuit design.

Fixed Inductors Part Context

This part belongs to the Delevan ER1840 series of fixed RF inductors. The series offers various inductance values while maintaining consistent physical dimensions and mounting styles. These components are characterized by their established reliability standards and molded construction, distinguishing them from air-core or ferrite alternatives in similar form factors.

Fixed Inductors Replacement Considerations

Cross-reference with other ER1840 series variants for different inductance values. Verify equivalent performance from manufacturers producing MIL-PRF-39010 compliant components. Ensure substitute parts match the 4.75 mm x 11.1 mm axial package dimensions.