5526R-3 Equivalent & Substitute Parts Reference

Part Overview

The 5526R-3 is a 130 nH unshielded wirewound surface mount inductor rated for 3 A continuous current, manufactured by API Delevan Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -55°C to 125°C and demonstrates a Q factor of 87 at 50 MHz with a self-resonant frequency of 900 MHz.

Substiute Parts

5526R-3

API Delevan Inc.In Stock: 11305526R-3 Datasheet

Current PartRFQ

744918213

Würth ElektronikIn Stock: 1716744918213 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5526R-3 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Inductance value of 130 nH with ±5% tolerance
• Current rating of 3 A or greater
• Unshielded configuration
• Air core material
• Self-resonant frequency of 900 MHz

Mechanical Parameters (Must Match):

• Surface mount package type
• Nonstandard package classification

Environmental & Compliance Parameters (Must Meet or Exceed):

• Operating temperature range of -55°C to 125°C or broader
• ROHS3 compliance
• Moisture sensitivity level of 1 or less restrictive

The substitute part 744918213 (Würth Elektronik WE-CAIR series) satisfies all mandatory equivalence criteria and is therefore classified as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The 744918213 (Würth Elektronik WE-CAIR series) is qualified as a direct substitute for the obsolete 5526R-3 based on the following engineering criteria:

Electrical Equivalence: Both components deliver identical inductance (130 nH ±5%), current rating (3 A), and self-resonant frequency (900 MHz). The substitute exhibits superior Q factor performance (100 versus 87 at 50 MHz), indicating lower losses and improved efficiency in RF applications.

Mechanical Compatibility: Both parts utilize surface mount technology with nonstandard package dimensions. Physical dimensions are comparable (5526R-3: 10.67mm × 5.97mm × 6.35mm; 744918213: 10.55mm × 6.35mm × 5.90mm), supporting direct PCB layout substitution with minimal redesign.

Compliance & Availability: The substitute part carries active product status with ROHS3 compliance and unlimited moisture sensitivity rating, matching the original specification. The 744918213 is available in tape and reel packaging (5910 supplier device package) with documented inventory of 1655 units.

Temperature 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 thermal performance verification.

Regulatory Alignment: Both components are classified under ECCN EAR99 and HTSUS 8504.50.8000, with REACH unaffected status, ensuring consistent export and supply chain compliance.

Frequently Asked Questions (FAQ)

Q: Can the 744918213 be used as a direct replacement for the 5526R-3 in existing designs?

A: Yes, the 744918213 qualifies as a direct electrical and mechanical substitute. Identical inductance, tolerance, current rating, and core configuration ensure functional equivalence. PCB layout modifications are not required due to comparable physical dimensions.

Q: What is the significance of the Q factor difference (87 versus 100)?

A: The higher Q factor of the 744918213 indicates lower resistive losses at 50 MHz. This results in improved efficiency and reduced heat dissipation in RF and high-frequency applications. This represents a performance enhancement over the original specification.

Q: Does the narrower operating temperature range of the 744918213 affect substitution suitability?

A: The substitute operates from -40°C to 125°C versus the original -55°C to 125°C. For applications requiring operation below -40°C, thermal performance must be verified against design requirements. For standard industrial and commercial temperature ranges, the substitute is fully suitable.

Q: Are there packaging differences between these components?

A: Both parts are surface mount with nonstandard packages. The 744918213 is supplied in tape and reel format (5910 package), while the 5526R-3 packaging format is not specified. This difference affects procurement and assembly processes but not electrical performance or PCB compatibility.

Q: What is the DC resistance specification for the 744918213?

A: The 744918213 specifies a maximum DC resistance of 20 mOhm. The original 5526R-3 does not provide a DCR specification. This additional specification on the substitute provides design margin for current-carrying applications and thermal calculations.

Q: Why is the 5526R-3 classified as obsolete?

A: The 5526R-3 is no longer in active production. The 744918213 from Würth Elektronik represents the active equivalent in the market, with documented inventory availability and ongoing manufacturing support.

Q: Are both components RoHS compliant?

A: Yes, both the 5526R-3 and 744918213 are ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.