4426-10 Fixed Inductor Equivalent & Substitute Parts

Part Overview

The 4426-10 is a 43 nH unshielded wirewound surface mount inductor manufactured by API Delevan Inc., rated for 3 A continuous current. This component is classified as Active product status with full inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component obsolescence, supply constraints, or design optimization needs.

Substiute Parts

4426-10

API Delevan Inc.In Stock: 10034426-10 Datasheet

Current PartRFQ

744914143

Würth ElektronikIn Stock: 1467744914143 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4426-10 is determined by the following critical parameters:

• Inductance value: 43 nH (exact match required)
• Tolerance: ±5% (matching specification)
• Core material: Air (unshielded wirewound construction)
• Mounting type: Surface Mount
• Current rating: Equal to or greater than 3 A
• Operating temperature range: Must encompass or exceed -55°C ~ 125°C
• Package classification: Nonstandard form factor

The substitute part 744914143 (Würth Elektronik WE-CAIR series) meets these criteria with enhanced current rating (4 A) and specified DC resistance characteristics, maintaining electrical equivalence while offering improved thermal performance margins.

Parameter Comparison

Engineering Selection Recommendations

The 744914143 substitute part is electrically equivalent to the 4426-10 for applications requiring 43 nH inductance with ±5% tolerance in unshielded wirewound construction. The substitute provides a higher current rating (4 A versus 3 A), enabling operation with increased current margin in the same circuit topology.

The 744914143 carries AEC-Q200 automotive qualification and ROHS3 compliance, whereas the 4426-10 is RoHS non-compliant. Selection between these parts depends on regulatory requirements and supply chain constraints. The operating temperature range of the 744914143 (-40°C ~ 125°C) is narrower at the lower bound compared to the 4426-10 (-55°C ~ 125°C); applications requiring operation below -40°C must retain the original 4426-10 specification.

Frequently Asked Questions (FAQ)

Q: Can the 744914143 directly replace the 4426-10 in all applications?

A: Electrical substitution is valid for inductance, tolerance, and core material specifications. Physical package dimensions differ (744914143: 6.86mm L × 3.05mm W versus 4426-10: 3.68mm L × 3.05mm W), requiring PCB layout verification. Operating temperature range differs at the lower limit (-40°C minimum for 744914143 versus -55°C for 4426-10).

Q: What are the key differences in current handling?

A: The 744914143 is rated for 4 A continuous current compared to 3 A for the 4426-10. Both parts maintain identical inductance and Q factor at 150 MHz. The substitute provides 33% additional current capacity.

Q: Are there compliance differences between these parts?

A: The 744914143 is ROHS3 compliant with AEC-Q200 automotive qualification. The 4426-10 is RoHS non-compliant. Applications subject to RoHS or automotive standards must use the 744914143.

Q: How do the self-resonant frequencies compare?

A: The 4426-10 has a self-resonant frequency of 1.5 GHz, while the 744914143 is specified at 1.2 GHz. Both values are provided for reference; substitution is valid when circuit operating frequencies remain below these limits.

Q: What packaging considerations apply to substitution?

A: Both parts use Tape & Reel (TR) packaging with Nonstandard case classification and MSL 1 (Unlimited) moisture sensitivity. Physical footprint differences require PCB design review before implementation.