4426R-9RC Equivalent & Substitute Parts

Part Overview

The 4426R-9RC is a 35.5 nH unshielded wirewound inductor rated for 3 A continuous current, manufactured by API Delevan Inc. This component is classified as obsolete, making identification of compatible alternatives essential for ongoing circuit maintenance and procurement planning. The part operates across an industrial temperature range of -55°C to 125°C and is ROHS3 compliant with unlimited moisture sensitivity level rating.

Substiute Parts

4426R-9RC

API Delevan Inc.In Stock: 7454426R-9RC Datasheet

Current PartRFQ

744914135

Würth ElektronikIn Stock: 1578744914135 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4426R-9RC is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Inductance: 35.5 nH (±5% tolerance)
• Core Material: Air
• Shielding Configuration: Unshielded
• Mounting Type: Surface Mount
• Package Type: Nonstandard

Compatible Current Rating:

• Original part rated 3 A; substitutes with equal or higher current ratings (≥3 A) are acceptable

Physical Dimensions:

• Length: 0.270" (6.86mm)
• Width: 0.125" (3.18mm) nominal; variants up to 0.120" (3.05mm) width are compatible
• Height (Seated): 0.120" (3.05mm) maximum

The substitute WE-CAIR 744914135 from Würth Elektronik meets all mandatory parameters while providing enhanced specifications in current rating (4 A versus 3 A) and documented DC resistance (6.8mOhm maximum) unavailable for the original part.

Parameter Comparison

Engineering Selection Recommendations

4426R-9RC (Original Part): Product status: Obsolete. ROHS3 compliant. No regulatory certifications documented beyond environmental compliance.

744914135 (Substitute): Product status: Active. ROHS3 compliant. AEC-Q200 certified, indicating automotive-grade qualification and extended reliability testing. This certification provides enhanced assurance for applications requiring stringent quality standards.

For new designs and ongoing procurement, the 744914135 substitute is recommended due to active product status and AEC-Q200 qualification. The enhanced current rating (4 A versus 3 A) and specified DC resistance (6.8 mOhm maximum) support margin analysis for thermal and power dissipation calculations. Physical dimensions are compatible within standard manufacturing tolerances for surface mount placement.

For legacy systems currently using the 4426R-9RC, substitution is appropriate provided the application does not require operation below -40°C; the original part specifies operation to -55°C while the substitute is rated -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 744914135 directly replace the 4426R-9RC? A: Yes. Both parts share identical inductance (35.5 nH ±5%), core material (air), shielding configuration (unshielded), and mounting type (surface mount). Physical dimensions are compatible within manufacturing tolerances for PCB assembly processes.

Q: What is the significance of the current rating difference (3 A versus 4 A)? A: The substitute 744914135 has a higher current rating, providing margin for applications at or near the original 3 A specification. This does not restrict substitution; lower-rated applications can use higher-rated components.

Q: Does the AEC-Q200 certification on the substitute affect compatibility? A: No. AEC-Q200 is an automotive electronics qualification standard indicating enhanced reliability testing and process controls. This certification provides additional assurance but does not alter electrical or mechanical compatibility.

Q: Why is the original part obsolete? A: Product obsolescence reflects manufacturer discontinuation. The active substitute 744914135 addresses this by providing equivalent functionality with current production status.

Q: Are there temperature range differences I should consider? A: The original 4426R-9RC operates from -55°C to 125°C; the substitute 744914135 operates from -40°C to 125°C. For applications requiring operation below -40°C, the original specification must be verified or alternative sources confirmed. The upper temperature limit (125°C) is identical.

Q: How do the self-resonant frequency specifications compare? A: The original part specifies 1.8 GHz; the substitute specifies 1.5 GHz. Both frequencies are well above typical operating frequencies for this inductance value. This minor variance does not restrict substitution for standard RF and analog applications.

Q: Is the nonstandard package type suitable for automated assembly? A: Both parts use nonstandard surface mount packages. Confirmation with your PCB assembly provider regarding feeder compatibility and placement parameters is required prior to production qualification.