5526-8 Equivalent & Substitute Parts

Part Overview

The API Delevan Inc. 5526-8 is a 307 nH unshielded wirewound inductor rated for 3 A continuous current. This component is currently classified as obsolete, necessitating the identification of equivalent substitute parts for ongoing system support and new design implementations. The Abracon LLC AIAC-4125C-R307J-T provides functional equivalence while maintaining active product status.

Substiute Parts

5526-8

API Delevan Inc.In Stock: 11355526-8 Datasheet

Current PartRFQ

AIAC-4125C-R307J-T

Abracon LLCIn Stock: 1859AIAC-4125C-R307J-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The AIAC-4125C-R307J-T from Abracon LLC qualifies as a direct electrical substitute based on the following critical parameters:

• Inductance Value: Both parts specify 307 nH at ±5% tolerance
• Current Rating: Both rated for 3 A continuous operation
• Core Material: Both utilize air-core construction
• Shielding Configuration: Both are unshielded wirewound designs
• Mounting Interface: Both employ surface mount technology
• Operating Temperature: Substitute supports -40°C ~ 125°C range (encompasses the original -55°C lower threshold requirement)
• Frequency Characteristics: Both tested at 50 MHz with comparable Q factors

The substitute part demonstrates improved product status (active vs. obsolete) and enhanced compliance certifications (RoHS3 compliant), while maintaining electrical and mechanical compatibility within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The AIAC-4125C-R307J-T is the qualified equivalent for replacement applications requiring the 5526-8. Selection rationale:

Product Availability: The substitute part maintains active manufacturing status with confirmed inventory (1778 pcs), ensuring long-term procurement availability.

Regulatory Compliance: The AIAC-4125C-R307J-T achieves RoHS3 compliance, supporting modern regulatory requirements and board-level manufacturing standards. The original 5526-8 does not meet this compliance threshold.

Electrical Equivalence: Core electrical parameters—inductance value, tolerance, current rating, and frequency characteristics—are matched within acceptable engineering variance. The specified Q factor of 100 @ 50 MHz in the substitute exceeds the original 95, providing improved performance at the test frequency.

Dimensional Compatibility: The substitute exhibits reduced footprint (9.00mm x 4.40mm vs. 10.67mm x 6.35mm) and lower profile (5.00mm vs. 5.97mm), accommodating space-constrained PCB layouts.

Temperature Operating Range: The substitute's -40°C ~ 125°C range covers standard industrial operating requirements, though applications requiring the original -55°C lower limit should conduct thermal stress analysis.

Frequently Asked Questions (FAQ)

Q: Can the AIAC-4125C-R307J-T directly replace the 5526-8 without circuit redesign?

A: Yes. Both parts maintain identical inductance values, tolerance, current ratings, and core materials. The substitute's reduced footprint and improved Q factor support direct substitution in surface mount applications. Thermal environments below -40°C require validation.

Q: How do the self-resonant frequency differences affect circuit performance?

A: The original operates at 660 MHz self-resonance while the substitute operates at 500 MHz. Both values establish the frequency boundary above which the component behaves capacitively. Circuit operation below these thresholds experiences no functional impact.

Q: What is the significance of the 22 mOhm maximum DC resistance specification?

A: The AIAC-4125C-R307J-T explicitly specifies maximum DC resistance, while the original part does not provide this measurement. The 22 mOhm value represents acceptable parasitic resistance for 3 A operation, contributing negligible voltage drop (66 mV maximum at rated current).

Q: Are there PCB layout considerations when switching to the smaller AIAC-4125C-R307J-T?

A: The substitute's smaller footprint permits more compact routing. Existing pad layouts designed for the 10.67mm x 6.35mm original part require redesign for the 9.00mm x 4.40mm substitute. Standard 0.05-inch pitch adjustments accommodate typical land pattern scaling.

Q: Does RoHS3 compliance affect electrical performance?

A: RoHS3 compliance addresses material composition (elimination of restricted substances) and does not alter inductance, impedance, or frequency characteristics. The electrical performance remains functionally equivalent.

Q: What packaging formats are available for the substitute part?

A: The AIAC-4125C-R307J-T is supplied in Tape & Reel (TR) format, standard for automated assembly environments. The original 5526-8 packaging format was not specified in available data.