Bourns 9250-101 100nH Shielded Drum Core Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9250-101 is a 100nH shielded drum core wirewound inductor rated for 1.79A continuous current with 25mOhm maximum DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The 9250-101 operates across the temperature range of -55°C to 105°C and is designed for through-hole axial mounting applications requiring shielded inductive filtering at RF frequencies.

Substiute Parts

9250-101

Bourns Inc.In Stock: 8179250-101 Datasheet

Current PartRFQ

9250A-101-RC

Bourns Inc.In Stock: 16669250A-101-RC Datasheet

DirectRFQ

ER1641-101KM

API Delevan Inc.In Stock: 1000ER1641-101KM Datasheet

SimilarRFQ

ER1641-101KP

API Delevan Inc.In Stock: 1156ER1641-101KP Datasheet

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ER1641-101KR

API Delevan Inc.In Stock: 1113ER1641-101KR Datasheet

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ER1641-101KS

API Delevan Inc.In Stock: 1161ER1641-101KS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 9250-101 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 100 nH ±10%
• Current rating: 1.79 A minimum
• DC resistance: 25 mOhm maximum
• Shielding: Shielded construction required
• Q factor @ 25MHz: 50
• Self resonant frequency: 250 MHz
• Mounting: Through-hole axial configuration
• Physical footprint: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)

Direct Substitute (Same Manufacturer): The Bourns 9250A-101-RC is a direct functional equivalent manufactured by the same supplier, featuring identical electrical specifications with upgraded construction (molded type vs. drum core) and extended operating temperature range to 125°C.

Cross-Manufacturer Alternatives: The API Delevan ER1641 series (ER1641-101KM, ER1641-101KP, ER1641-101KR, ER1641-101KS) provides electrical equivalence across all critical parameters. These parts utilize phenolic core material instead of ferrite and are available in tape & reel packaging. All ER1641 variants maintain identical inductance, current rating, DCR, Q factor, and self-resonant frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production Continuity: The Bourns 9250A-101-RC is the recommended primary substitute. As an active product from the original manufacturer, it provides direct functional equivalence with improved RoHS3 compliance and extended operating temperature capability to 125°C. The molded construction offers enhanced reliability compared to the obsolete drum core design.

For Applications with Existing Supply Chain Constraints: The API Delevan ER1641 series (ER1641-101KM, ER1641-101KP, ER1641-101KR, ER1641-101KS) provides full electrical equivalence and maintains identical mechanical footprint compatibility. These parts are active products with established inventory availability. Selection among the four ER1641 variants depends on packaging requirements: all are supplied in tape & reel format with differentiation based on reel size or quantity specifications.

Compliance Considerations: Applications requiring RoHS3 compliance must use the 9250A-101-RC. Applications operating at temperatures above 105°C must use the 9250A-101-RC (rated to 125°C). Applications with existing RoHS non-compliance requirements may utilize ER1641 series parts.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-101-RC directly replace the 9250-101 in existing PCB designs? A: Yes. The 9250A-101-RC maintains identical physical dimensions (0.162" Dia x 0.410" L), axial through-hole mounting configuration, and all critical electrical parameters (100nH inductance, 1.79A current rating, 25mOhm DCR, 50 Q @ 25MHz, 250MHz self-resonant frequency). No PCB layout modifications are required.

Q: What is the difference between the Bourns 9250A-101-RC and API Delevan ER1641 series? A: Both provide identical electrical performance across all specified parameters. The primary differences are manufacturer (Bourns vs. API Delevan), core material (ferrite vs. phenolic), packaging format (bulk vs. tape & reel), and RoHS compliance status (9250A-101-RC is ROHS3 compliant; ER1641 series is non-compliant). Physical footprint and mounting are identical.

Q: Are all four ER1641 variants (KM, KP, KR, KS) electrically identical? A: Yes. ER1641-101KM, ER1641-101KP, ER1641-101KR, and ER1641-101KS are electrically identical with identical inductance, current rating, DCR, Q factor, and self-resonant frequency specifications. Variant designations reflect packaging or reel configuration differences only.

Q: What is the impact of core material differences (ferrite vs. phenolic)? A: Both ferrite and phenolic core materials deliver the specified electrical performance at the stated operating frequencies and current levels. The core material difference does not affect the critical electrical parameters provided in this reference.

Q: Can these inductors be used in applications exceeding 105°C? A: The 9250-101 and ER1641 series are rated to -55°C to 105°C. The 9250A-101-RC extends the upper operating limit to 125°C. Applications requiring operation above 105°C must use the 9250A-101-RC.

Q: What packaging formats are available? A: The 9250A-101-RC is supplied in bulk packaging. The ER1641 series is supplied in tape & reel (TR) format. Bulk packaging is suitable for manual assembly and low-volume production; tape & reel format is optimized for automated pick-and-place assembly.