5526R-4 Equivalent & Substitute Parts

Part Overview

The 5526R-4 is a 169 nH unshielded wirewound inductor rated for 3 A continuous current, manufactured by API Delevan Inc. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -55°C to 125°C and demonstrates a Q factor of 95 at 50 MHz with a self-resonant frequency of 875 MHz.

Substiute Parts

5526R-4

API Delevan Inc.In Stock: 9415526R-4 Datasheet

Current PartRFQ

744918217

Würth ElektronikIn Stock: 1674744918217 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5526R-4 is determined by strict equivalence across the following critical parameters:

• Inductance value: 169 nH ±5%
• Current rating: 3 A minimum
• Core type: Air core
• Shielding configuration: Unshielded
• Mounting: Surface mount
• Self-resonant frequency: 875 MHz
• Operating temperature range: Must support minimum -40°C to 125°C

The Würth Elektronik 744918217 meets all substitution criteria. This part maintains identical inductance, tolerance, current rating, core material, and shielding characteristics. The substitute demonstrates equivalent electrical performance with Q @ 50 MHz of 100 (compared to 95 for the original) and identical self-resonant frequency.

Parameter Comparison

Engineering Selection Recommendations

The 744918217 from Würth Elektronik is a direct functional equivalent for the obsolete 5526R-4. Both components are ROHS3 compliant and carry identical MSL ratings. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The Würth Elektronik part carries AEC-Q200 automotive qualification, providing additional reliability assurance beyond the original component specification. The substitute's operating temperature range of -40°C to 125°C covers the majority of industrial and commercial applications; designs requiring the full -55°C lower limit of the original part must evaluate temperature performance independently.

The specified DC resistance maximum of 25 mOhm for the substitute provides measurable performance data absent from the original part specification, enabling more precise circuit analysis.

Frequently Asked Questions (FAQ)

Q: Can the 744918217 replace the 5526R-4 in all applications?

A: The 744918217 is electrically and mechanically equivalent for applications operating within -40°C to 125°C. Applications requiring operation below -40°C must be evaluated separately.

Q: What is the significance of the Q factor difference (95 vs. 100)?

A: The Q factor at 50 MHz indicates energy efficiency in the inductor. The substitute's Q of 100 represents slightly lower losses than the original's Q of 95, which is favorable for circuit performance.

Q: Are there packaging differences between these parts?

A: Both parts are surface mount with nonstandard package dimensions. The 5526R-4 measures 0.420" L × 0.235" W × 0.250" H; the 744918217 measures 0.415" L × 0.250" W × 0.232" H. Verify PCB layout compatibility before substitution.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry standard for passive components. This certification indicates the substitute part meets stringent reliability and performance requirements, though it is not required for non-automotive applications.

Q: Is the DC resistance specification critical for my application?

A: DC resistance affects power dissipation and circuit impedance. The 744918217 specifies 25 mOhm maximum; if your circuit requires lower DCR, verify this specification against your design requirements.