105-121F

Description：FIXED IND 120NH 830MA 140MOHM SM
Series：105
Mfr：Delevan
Package：Tape & Reel (TR)

SKU:3ad0f8f076b7 Category: Fixed Inductors Brand: Delevan

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Product introduction

Product Detailed Parameters

Description：FIXED IND 120NH 830MA 140MOHM SM
Series：105
Mfr：Delevan
Package：Tape & Reel (TR)
Type：-
Material - Core：Iron
Inductance：120 nH
Tolerance：±1%
Current Rating (Amps)：830 mA
Current - Saturation (Isat)：-
Shielding：Unshielded
DC Resistance (DCR)：140mOhm Max
Q @ Freq：40 @ 25MHz
Frequency - Self Resonant：500MHz
Ratings：-
Operating Temperature：-55°C ~ 125°C
Inductance Frequency - Test：25 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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105-121F

Overview

The Delevan 105-121F is a surface-mount RF inductor designed for radio frequency applications. It features an unshielded construction with a ferrite core and wirewound winding type. The component provides an inductance of 120 nH with a tight tolerance of 1%. It supports a maximum DC current of 710 mA and exhibits a minimum Q factor of 42. The self-resonant frequency reaches 400 MHz, while the maximum DC resistance is limited to 200 mOhms. Physical dimensions are 3.94 mm in length, 2.79 mm in width, and 1.91 mm in height. The device utilizes standard SMD/SMT termination style for PCB mounting.

Feature Summary

Unshielded design suitable for specific RF circuit layouts
High precision 1% inductance tolerance
Ferrite core construction for stable performance

Applications

RF signal processing circuits
Radio frequency filtering networks
Impedance matching stages

Procurement Notes

This component is officially classified as obsolete and is no longer manufactured by Delevan. Verification of availability should focus on surplus distributors or secondary market sources rather than direct manufacturer channels. Confirm RoHS compliance status carefully, as documentation indicates non-compliance. Ensure that any replacement sourcing strictly matches the original electrical specifications and physical footprint to maintain circuit integrity.

Selection Notes

Engineers selecting this part must account for its discontinued status and prioritize verified substitute components. The unshielded nature requires careful layout consideration to prevent electromagnetic interference with adjacent traces. Verify that the target application operates within the specified 710 mA current limit and respects the 400 MHz self-resonant frequency boundary to ensure optimal filter characteristics.

Part Context

The 105-121F belongs to the Delevan fixed inductor family, specifically categorized under RF Inductors - SMD. It shares the 105 series designation with other variants like the 105R-121F, though pinout and shielding configurations may differ. This model represents a legacy solution for high-frequency analog and RF designs requiring precise inductance values in a compact surface-mount package.