API Delevan 4426-6 Equivalent & Substitute Parts

Part Overview

The API Delevan 4426-6 is a 17.5 nH unshielded wirewound inductor rated for 3 A continuous current, designed for surface mount applications in high-frequency circuits. This component operates across the temperature range of -55°C to 125°C and is currently in active production status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and package form factor.

Key Parameters

Parameter	Value
Inductance	17.5 nH
Tolerance	±5%
Current Rating	3 A
Type	Wirewound
Core Material	Air
Shielding	Unshielded
Q @ Frequency	100 @ 150 MHz
Frequency - Self Resonant	3 GHz
Mounting Type	Surface Mount
Package / Case	Nonstandard
Size / Dimension	0.270" L x 0.120" W (6.86 mm x 3.05 mm)
Height - Seated (Max)	0.125" (3.18 mm)
Operating Temperature	-55°C ~ 125°C
Packaging	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution eligibility for the API Delevan 4426-6 is determined by the following critical parameters:

Inductance Value: Must be 17.5 nH with ±5% tolerance
Core Type: Air core wirewound construction
Shielding Configuration: Unshielded
Mounting Technology: Surface mount
Physical Dimensions: 0.270" L x 0.120" W (6.86 mm x 3.05 mm) with maximum seated height of 0.125" (3.18 mm)
Frequency Performance: Q factor of 100 @ 150 MHz and self-resonant frequency characteristics
Packaging Format: Tape & Reel (TR)

The Würth Elektronik 744914117 qualifies as a substitute part because it maintains identical inductance, tolerance, core material, shielding, mounting type, physical dimensions, and packaging specifications. The substitute part demonstrates equivalent electrical performance at the specified test frequency while providing enhanced current rating capability and documented DC resistance specification.

Parameter Comparison

Parameter	API Delevan 4426-6	Würth Elektronik 744914117
Inductance	17.5 nH	17.5 nH
Tolerance	±5%	±5%
Current Rating (Amps)	3 A	4 A
Type	Wirewound	Wirewound
Core Material	Air	Air
Shielding	Unshielded	Unshielded
Q @ Frequency	100 @ 150 MHz	100 @ 150 MHz
Frequency - Self Resonant	3 GHz	2.2 GHz
DC Resistance (DCR)	Not specified	4.5 mOhm Max
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount
Size / Dimension	0.270" L x 0.120" W (6.86 mm x 3.05 mm)	0.270" L x 0.120" W (6.86 mm x 3.05 mm)
Height - Seated (Max)	0.125" (3.18 mm)	0.125" (3.18 mm)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the API Delevan 4426-6 and Würth Elektronik 744914117 are active production components with identical core electrical and mechanical specifications. The Würth Elektronik 744914117 provides ROHS3 compliance and AEC-Q200 automotive qualification, whereas the API Delevan 4426-6 is RoHS non-compliant. The substitute part supports a higher current rating of 4 A compared to the 3 A rating of the main part, providing additional design margin in applications where current headroom is beneficial. The operating temperature range of the API Delevan part extends to -55°C, offering wider low-temperature coverage than the Würth Elektronik substitute at -40°C minimum. Selection between these parts should be based on regulatory compliance requirements, temperature operating range specifications, and current capacity needs of the target application.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744914117 be used as a direct replacement for the API Delevan 4426-6?

A: Yes, the Würth Elektronik 744914117 is electrically and mechanically compatible as a substitute. Both parts maintain identical inductance values, tolerances, core materials, shielding configurations, and physical dimensions. Compatibility is confirmed for applications operating within the -40°C to 125°C temperature range of the substitute part.

Q: What are the key differences between these two parts?

A: The primary differences are current rating (4 A versus 3 A), DC resistance specification (4.5 mOhm Max for the substitute versus unspecified for the main part), RoHS compliance status (ROHS3 for the substitute versus non-compliant for the main part), AEC-Q200 automotive qualification (present in the substitute), and minimum operating temperature (-40°C for the substitute versus -55°C for the main part).

Q: Are there any frequency performance differences?

A: Both parts maintain a Q factor of 100 @ 150 MHz. The self-resonant frequency differs slightly, with the API Delevan 4426-6 rated at 3 GHz and the Würth Elektronik 744914117 at 2.2 GHz. This difference should be evaluated for applications operating near these frequency boundaries.

Q: What packaging format is used for both parts?

A: Both the API Delevan 4426-6 and Würth Elektronik 744914117 are supplied in Tape & Reel (TR) packaging format, ensuring compatibility with automated assembly processes.

Q: Which part should be selected for applications requiring RoHS compliance?

A: The Würth Elektronik 744914117 is ROHS3 compliant and should be selected for applications with RoHS regulatory requirements. The API Delevan 4426-6 is RoHS non-compliant.

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