5526-9 Equivalent & Substitute Parts Reference

Part Overview

The 5526-9 is a 380 nH unshielded wirewound inductor rated for 2.5 A continuous current, manufactured by API Delevan Inc. This component is designed for surface mount applications requiring low inductance values with high current capacity in a nonstandard package format. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

5526-9

API Delevan Inc.In Stock: 10925526-9 Datasheet

Current PartRFQ

AIAC-4125C-R380J-T

Abracon LLCIn Stock: 763AIAC-4125C-R380J-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5526-9 is based on strict electrical and mechanical parameter matching within the wirewound inductor category. The following parameters establish substitution validity:

Critical Matching Parameters:

• Inductance value of 380 nH with ±5% tolerance
• Current rating of 2.5 A or greater
• Unshielded air-core construction
• Surface mount package configuration
• Nonstandard package dimensions compatible with PCB layout

Secondary Compatibility Parameters:

• Operating temperature range (substitute must cover or exceed the application requirement)
• Q factor and self-resonant frequency characteristics
• DC resistance specifications where applicable

The AIAC-4125C-R380J-T from Abracon LLC qualifies as a direct substitute based on matching all critical electrical parameters and surface mount configuration, while offering improved product status (active vs. obsolete) and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AIAC-4125C-R380J-T

The AIAC-4125C-R380J-T is the qualified equivalent for the obsolete 5526-9. Selection of this substitute is based on the following engineering factors:

1. Electrical Equivalence: All critical electrical parameters match exactly, including inductance, tolerance, current rating, and core construction. The substitute maintains functional compatibility in circuit applications.

2. Product Status: The substitute is classified as active, ensuring long-term availability and supply chain stability compared to the obsolete 5526-9.

3. Compliance Certifications: The AIAC-4125C-R380J-T is ROHS3 compliant, addressing regulatory requirements that the original part does not meet. Both parts are REACH unaffected and classified as EAR99.

4. Temperature Range Consideration: The substitute operates from -40°C to 125°C, compared to the original -55°C to 125°C. Applications requiring operation below -40°C require evaluation of actual environmental requirements.

5. Performance Characteristics: The substitute exhibits a Q factor of 100 at 50 MHz (versus 95 for the original) and a self-resonant frequency of 500 MHz (versus 590 MHz). These differences are within acceptable ranges for most RF and high-frequency applications.

6. Packaging: The substitute is supplied in standard Tape & Reel format, improving handling and assembly efficiency compared to the nonstandard packaging of the original part.

Frequently Asked Questions (FAQ)

Q: Can the AIAC-4125C-R380J-T be used as a direct replacement for the 5526-9 in all applications?

A: The AIAC-4125C-R380J-T is electrically equivalent for all critical parameters. However, applications requiring operation below -40°C must verify that the reduced lower temperature limit is acceptable. Physical package dimensions differ slightly (9.00mm x 4.40mm vs. 10.67mm x 6.35mm), requiring PCB layout verification.

Q: What is the significance of the different self-resonant frequencies (590 MHz vs. 500 MHz)?

A: Self-resonant frequency defines the upper frequency limit of inductor operation. The substitute's 500 MHz rating is suitable for applications up to approximately 400 MHz. Applications operating above 400 MHz require confirmation that the reduced self-resonant frequency does not impact circuit performance.

Q: Why is the DC resistance specified for the substitute but not for the original part?

A: The 25.5 mOhm maximum DC resistance of the substitute provides additional design information for power loss calculations. The absence of this specification in the original part data does not indicate incompatibility; it reflects different documentation practices between manufacturers.

Q: Are there any compliance advantages to using the substitute?

A: Yes. The AIAC-4125C-R380J-T is ROHS3 compliant, whereas the 5526-9 is non-compliant. For applications subject to RoHS regulations, the substitute is the required choice.

Q: How do the packaging differences affect assembly?

A: The substitute is supplied in standard Tape & Reel packaging, enabling automated pick-and-place assembly. The original nonstandard packaging may require manual handling. The physical dimensions are similar but not identical, requiring PCB footprint verification before assembly.

Q: Is the higher Q factor of the substitute (100 vs. 95) beneficial?

A: A higher Q factor indicates lower losses and better performance at the test frequency of 50 MHz. This is generally beneficial for RF and high-frequency applications, resulting in improved circuit efficiency.