5526-2 Equivalent & Substitute Parts Reference

Part Overview

The 5526-2 is a fixed unshielded wirewound inductor manufactured by API Delevan Inc., rated at 111 nH inductance with 3.5 A current capacity. This component is designed for surface mount applications in high-frequency circuits requiring low inductance values. 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

5526-2

API Delevan Inc.In Stock: 9685526-2 Datasheet

Current PartRFQ

AIAC-4125C-R111J-T

Abracon LLCIn Stock: 1456AIAC-4125C-R111J-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5526-2 is based on strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Inductance value: 111 nH ±5%
• Current rating: 3.5 A minimum
• Core material: Air (unshielded)
• Mounting type: Surface mount
• Package classification: Nonstandard

Acceptable Variation Criteria:

• Operating temperature range: Substitute must cover the full -55°C to 125°C envelope or extend it
• Self resonant frequency: Substitute must maintain ≥1.0 GHz minimum
• Q factor: Higher values indicate improved performance but are not substitution-limiting factors
• DC resistance: Lower values are beneficial but not mandatory for functional equivalence

The AIAC-4125C-R111J-T from Abracon LLC meets all mandatory matching criteria and qualifies as a direct substitute. This part maintains identical inductance, current rating, core material, and mounting configuration while offering improved performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AIAC-4125C-R111J-T

The AIAC-4125C-R111J-T is the qualified equivalent for the obsolete 5526-2. Selection is based on the following engineering factors:

Functional Equivalence: All critical electrical parameters match exactly: 111 nH inductance, ±5% tolerance, 3.5 A current rating, air core, unshielded configuration, and surface mount packaging. The component operates within the required frequency range with self resonant frequency of 1.0 GHz.

Product Status: The substitute is active and in production, ensuring long-term supply availability. The 5526-2 is obsolete, making substitution necessary for ongoing procurement.

Compliance Status: The AIAC-4125C-R111J-T is ROHS3 compliant, whereas the 5526-2 is non-compliant. This provides regulatory advantage for new designs and applications subject to RoHS requirements.

Performance Enhancement: The substitute offers improved Q factor (100 vs. 87 @ 50 MHz) and specified DC resistance (9.5 mOhm max), indicating lower losses and better high-frequency performance.

Temperature Consideration: The substitute operating range is -40°C to 125°C, compared to -55°C to 125°C for the original. Applications requiring operation below -40°C require design review; applications within -40°C to 125°C are fully compatible.

Packaging: The substitute is supplied in Tape & Reel format, standard for automated assembly. The original nonstandard packaging is replaced with industry-standard handling.

Frequently Asked Questions (FAQ)

Q: Can the AIAC-4125C-R111J-T replace the 5526-2 in existing designs?

A: Yes, for applications operating within -40°C to 125°C. The electrical parameters are identical: 111 nH inductance, ±5% tolerance, 3.5 A rating, air core, and unshielded configuration. If the original design requires operation below -40°C, thermal performance must be verified before substitution.

Q: What is the primary reason for substituting the 5526-2?

A: The 5526-2 is obsolete. The AIAC-4125C-R111J-T is an active product with guaranteed supply availability, making it the appropriate choice for new production and ongoing repairs.

Q: Are there differences in physical dimensions between these parts?

A: Yes. The 5526-2 measures 0.420" L × 0.250" W × 0.235" H (10.67mm × 6.35mm × 5.97mm). The AIAC-4125C-R111J-T measures 0.354" L × 0.173" W × 0.197" H (9.00mm × 4.40mm × 5.00mm). The substitute is smaller. PCB layout compatibility must be verified; the smaller footprint typically allows direct substitution with potential layout optimization.

Q: Does the substitute meet RoHS requirements?

A: Yes. The AIAC-4125C-R111J-T is ROHS3 compliant. The original 5526-2 is non-compliant. This is advantageous for applications subject to RoHS regulations.

Q: What is the difference in Q factor between these inductors?

A: The AIAC-4125C-R111J-T has a Q factor of 100 @ 50 MHz, compared to 87 @ 50 MHz for the 5526-2. Higher Q indicates lower losses and improved efficiency at the test frequency. This represents a performance improvement of approximately 15%.

Q: Is DC resistance specified for the 5526-2?

A: No. The 5526-2 does not provide DC resistance specification. The AIAC-4125C-R111J-T specifies 9.5 mOhm maximum, allowing precise loss calculations and thermal analysis in the substitute design.

Q: Can these parts be used interchangeably in high-frequency circuits?

A: Yes, within the specified frequency range. Both parts have self resonant frequencies near 1.0 GHz, defining the upper frequency limit for linear operation. Circuit performance is equivalent at frequencies below 1.0 GHz.

Q: What packaging format is the substitute supplied in?

A: The AIAC-4125C-R111J-T is supplied in Tape & Reel (TR) format, standard for automated PCB assembly. The original 5526-2 used nonstandard packaging. TR format is compatible with standard pick-and-place equipment.

Q: Are there any compliance or certification differences?

A: Yes. Both parts are REACH unaffected and classified as EAR99 for export control. The substitute is ROHS3 compliant; the original is non-compliant. The substitute provides regulatory advantage for applications subject to RoHS directives.