4426-8RC Equivalent & Substitute Parts

Part Overview

The API Delevan Inc. 4426-8RC is a 28 nH unshielded wirewound inductor rated for 3 A continuous current operation. This component is designed for surface mount applications in RF and high-frequency circuits where precise inductance values and minimal DC resistance characteristics are critical. The 4426-8RC is classified as obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

4426-8RC

API Delevan Inc.In Stock: 9064426-8RC Datasheet

Current PartRFQ

744914128

Würth ElektronikIn Stock: 1280744914128 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute component identification for the 4426-8RC is determined by electrical and mechanical equivalence across the following critical parameters:

Electrical Parameters:

• Inductance value: 28 nH
• Inductance tolerance: ±5%
• Shielding configuration: Unshielded
• Core material: Air
• Q factor measurement: 105 @ 150MHz
• Self-resonant frequency: 2.6GHz (or comparable)
• Inductance test frequency: 150 MHz

Mechanical Parameters:

• Mounting type: Surface Mount
• Package form factor: Nonstandard (6.86mm x 3.05mm footprint)
• Height constraint: 0.125" (3.18mm) maximum seated height
• Component type: Wirewound

Operational Parameters:

• Current rating: 3 A minimum (higher ratings acceptable)
• Operating temperature: -55°C ~ 125°C or compatible range
• Moisture sensitivity: Level 1 or lower

The Würth Elektronik 744914128 satisfies substitution criteria through electrical matching of inductance, tolerance, core material, shielding type, and frequency characteristics, while providing enhanced current rating (4 A) and defined DC resistance specification.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744914128 represents an active product with current manufacturing status and ROHS3 compliance, addressing the obsolescence status of the 4426-8RC. Both components share identical inductance values, tolerance specifications, and core materials, ensuring electrical compatibility for circuit functionality.

The 744914128 provides increased current rating (4 A versus 3 A), offering higher thermal margin and operational headroom without compromising inductance or Q-factor performance. The defined maximum DC resistance of 6 mOhm provides explicit power dissipation characteristics for thermal analysis.

The operating temperature lower bound of -40°C for the 744914128 remains suitable for most industrial and commercial applications. The self-resonant frequency difference (1.8GHz versus 2.6GHz) reflects typical variance in air-core inductor design and does not impede substitution for circuits operating within standard RF frequency bands below self-resonance.

AEC-Q200 qualification of the 744914128 indicates automotive-grade reliability assessment, providing additional quality assurance beyond the original API Delevan component specifications.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744914128 directly replace the API Delevan 4426-8RC? A: The 744914128 is electrically and mechanically compatible with the 4426-8RC for applications requiring 28 nH inductance with ±5% tolerance in surface mount configurations. Physical footprint and height constraints are identical. The higher current rating (4 A) provides additional operational margin without affecting circuit behavior.

Q: What is the significance of the self-resonant frequency difference between these components? A: The 4426-8RC has a self-resonant frequency of 2.6GHz, while the 744914128 is specified at 1.8GHz. Self-resonant frequency defines the maximum frequency at which the inductor functions as designed; operation must remain below this threshold. For circuits operating at frequencies significantly below 1.8GHz, this parameter difference is not a limiting factor in substitution.

Q: Does the RoHS non-compliance of the original part affect substitution decisions? A: The 744914128 is ROHS3 compliant, addressing regulatory requirements for new designs and long-term supply chain sustainability. If the original design was subject to RoHS exemptions or non-regulated applications, the compliant substitute provides regulatory alignment benefits without circuit function impact.

Q: What is the relevance of AEC-Q200 qualification? A: AEC-Q200 is an automotive-grade reliability standard indicating the 744914128 has undergone stress testing and thermal cycling validation. This certification provides enhanced quality assurance suitable for mission-critical or high-reliability applications beyond the original part specification.

Q: Are there packaging format implications between these parts? A: The 4426-8RC original packaging information is not explicitly specified in this comparison. The 744914128 is supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly. Reel format is compatible with automated assembly equipment and typical manufacturing processes.

Q: What is the impact of DC resistance specification on the 744914128? A: The 744914128 specifies a maximum DC resistance of 6 mOhm, whereas the original 4426-8RC does not provide this parameter. DC resistance defines power dissipation (I²R loss) in the inductor winding. The 6 mOhm specification allows precise calculation of thermal effects at rated current (4 A = 96 mW maximum dissipation at 3 A current level = 54 mW).