4426R-8NC Equivalent & Substitute Parts

Part Overview

The 4426R-8NC is a fixed 28 nH unshielded wirewound inductor manufactured by API Delevan Inc., rated for 3 A continuous current. This component is classified as Active status and is designed for surface mount applications in RF and high-frequency circuits. The need to identify alternative models arises from inventory considerations, supply chain optimization, and application-specific performance requirements where substitute components may offer enhanced specifications or improved availability.

Substiute Parts

4426R-8NC

API Delevan Inc.In Stock: 12254426R-8NC Datasheet

Current PartRFQ

744914128

Würth ElektronikIn Stock: 1280744914128 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 744914128 from Würth Elektronik qualifies as a direct electrical substitute for the 4426R-8NC based on the following critical parameters:

Common Electrical Characteristics:

• Identical inductance value: 28 nH
• Matching quality factor at test frequency: 105 @ 150MHz
• Air core wirewound construction (unshielded)
• Surface mount packaging classification
• Common frequency test point: 150 MHz

Allowable Parameter Variations:

• Current rating: 744914128 rated 4 A versus 4426R-8NC rated 3 A (substitute exceeds requirement)
• DC resistance: 744914128 specifies 6 mOhm maximum (4426R-8NC not specified)
• Self-resonant frequency: 1.8 GHz (744914128) versus 2.6 GHz (4426R-8NC) – within acceptable circuit margin
• Tolerance: ±5% (744914128) versus ±30% (4426R-8NC) – substitute offers improved precision
• Physical dimensions: Minor differences in height and width within nonstandard package classification

Parameter Comparison

Engineering Selection Recommendations

Both components maintain Active product status, ensuring continued availability and manufacturing support. The 4426R-8NC offers operation across the extended temperature range of -55°C to 125°C, suitable for military and harsh environment specifications. The 744914128 operates within -40°C to 125°C, appropriate for industrial and commercial applications.

The 744914128 carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade component certification. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), simplifying assembly and storage requirements.

The 744914128 provides superior inductance tolerance (±5% versus ±30%), delivering better circuit precision where tight inductance matching is required. The current rating difference (4 A versus 3 A) permits the substitute to operate at lower stress levels in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can the 744914128 directly replace the 4426R-8NC in any circuit?

A: Direct electrical substitution is valid when the circuit operating conditions fall within both parts' specifications. The 744914128 must be verified for mechanical fit within the nonstandard package footprint and clearance envelope.

Q: What is the significance of the 30% tolerance difference?

A: The 4426R-8NC tolerance of ±30% requires circuit design margins to accommodate worst-case inductance variation. The 744914128 tolerance of ±5% enables tighter frequency response control and reduced component matching requirements in RF applications.

Q: Does the lower self-resonant frequency of the 744914128 affect substitution?

A: The 1.8 GHz self-resonant frequency of the 744914128 versus 2.6 GHz of the 4426R-8NC defines the upper frequency boundary for linear operation. Application suitability depends on circuit operating frequency and bandwidth requirements.

Q: What temperature considerations apply to the substitute part?

A: The 744914128 minimum operating temperature of -40°C versus -55°C for the 4426R-8NC may not be suitable for applications requiring extended low-temperature performance. Verify circuit thermal requirements before substitution.

Q: Are packaging dimensions functionally equivalent?

A: Both parts are classified as nonstandard package inductors with surface mount mounting type. Physical dimension variations (length 0.270" both; width 0.125" versus 0.120"; height 0.120" versus 0.125") require footprint verification for PCB layout compatibility.

Q: What certifications support the 744914128 for automotive applications?

A: The 744914128 carries AEC-Q200 qualification, establishing automotive-grade reliability and testing compliance. The 4426R-8NC does not specify automotive qualification.