5526R-12 Equivalent & Substitute Parts Reference

Part Overview

The 5526R-12 is a 538 nanohenry unshielded wirewound surface mount inductor manufactured by API Delevan Inc., rated for 2 amperes continuous current. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support, production continuity, and component sourcing in applications requiring this specific inductance value and current rating.

The 5526R-12 operates across the temperature range of -55°C to 125°C and demonstrates a quality factor of 87 at 50 MHz with a self-resonant frequency of 490 MHz. The part is RoHS3 compliant and carries MSL 1 (unlimited moisture sensitivity level) classification.

Substiute Parts

5526R-12

API Delevan Inc.In Stock: 10945526R-12 Datasheet

Current PartRFQ

AIAC-4125C-R538J-T

Abracon LLCIn Stock: 712AIAC-4125C-R538J-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5526R-12 is determined by strict equivalence across the following critical parameters:

Inductance Value and Tolerance: The substitute part must provide 538 nH ±5% inductance, measured at 50 MHz, to maintain circuit performance and frequency response characteristics.

Current Rating: The substitute must support a minimum continuous current rating of 2 amperes to ensure thermal stability and prevent saturation in the application circuit.

Core Material and Shielding: Both the main part and substitute must utilize air-core construction with unshielded configuration to maintain consistent electromagnetic coupling and EMI performance.

Mounting Technology: Surface mount packaging is required for PCB assembly compatibility with the original design footprint and reflow soldering processes.

Regulatory Compliance: RoHS3 compliance is mandatory for all substitute parts to meet current environmental and material restriction standards.

Operating Temperature Range: The substitute must support the full -55°C to 125°C operating envelope or a range that encompasses the application requirements.

The AIAC-4125C-R538J-T from Abracon LLC meets all critical substitution criteria and is classified as an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The AIAC-4125C-R538J-T is a direct functional equivalent to the obsolete 5526R-12 based on matching inductance, current rating, core material, shielding configuration, and mounting technology. Both components are RoHS3 compliant and carry MSL 1 classification.

Product Status Advantage: The AIAC-4125C-R538J-T maintains active product status with current manufacturing support from Abracon LLC, ensuring long-term component availability and supply chain continuity compared to the obsolete 5526R-12.

Performance Characteristics: The substitute part demonstrates superior quality factor (100 versus 87 at 50 MHz), indicating lower losses in the operating frequency band. The self-resonant frequency of 400 MHz in the substitute is lower than the original 490 MHz; this difference must be evaluated against specific circuit requirements if operation near or above 400 MHz is intended.

Temperature Range Consideration: The substitute operates across -40°C to 125°C, which is narrower than the original -55°C to 125°C range. Applications requiring operation below -40°C require verification of circuit performance or alternative component selection.

DC Resistance: The substitute specifies maximum DC resistance of 42 milliohms, providing quantified loss characteristics for thermal and efficiency calculations. The original part does not specify this parameter.

Regulatory and Compliance: Both components satisfy current environmental and material restriction requirements through RoHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the AIAC-4125C-R538J-T directly replace the 5526R-12 in existing designs?

A: Yes, for applications operating within -40°C to 125°C. The AIAC-4125C-R538J-T provides identical inductance (538 nH ±5%), current rating (2 A), core material (air), shielding (unshielded), and mounting type (surface mount). Applications requiring operation below -40°C require thermal performance verification.

Q: What is the significance of the different self-resonant frequencies (490 MHz versus 400 MHz)?

A: Self-resonant frequency defines the upper frequency limit where the inductor behaves as a pure inductance. The substitute's 400 MHz SRF is lower, meaning it transitions to capacitive behavior at a lower frequency. For circuits operating below 350 MHz, this difference is typically negligible. Circuits operating between 350 MHz and 490 MHz require impedance analysis to confirm acceptable performance.

Q: Why is the substitute's quality factor (100) higher than the original (87)?

A: Higher Q indicates lower resistive losses at 50 MHz. This is a performance advantage, resulting in reduced heat dissipation and improved efficiency in the operating frequency band.

Q: Does the specified DC resistance of 42 milliohms in the substitute affect circuit operation?

A: DC resistance contributes to resistive losses and heat generation under current flow. The 42 milliohm specification allows precise thermal and efficiency calculations. If the original design did not account for DCR, the substitute's specified value should be incorporated into thermal analysis.

Q: Are both components suitable for high-reliability applications?

A: Both components are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity), indicating suitability for standard industrial and commercial applications. The substitute's active product status provides better long-term support for high-reliability programs requiring sustained component availability.

Q: What packaging format is the substitute supplied in?

A: The AIAC-4125C-R538J-T is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly. Verify compatibility with your procurement and assembly processes.

Q: Can I use the substitute in applications requiring the full -55°C to 125°C temperature range?

A: The substitute is rated only to -40°C minimum. Applications requiring -55°C operation must either verify acceptable performance at the lower temperature limit or select an alternative component with the extended range specification.