Bourns 9250-184 180µH Shielded Drum Core Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 9250-184 is a 180 µH shielded drum core wirewound inductor rated for 135 mA continuous current with a maximum DC resistance of 4.4 Ohm. This through-hole axial component operates across the temperature range of -55°C to 105°C and features ferrite core construction with electromagnetic shielding. The 9250-184 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives maintain identical electrical specifications while offering improved compliance status and extended temperature operating ranges.

Substiute Parts

9250-184

Bourns Inc.In Stock: 7709250-184 Datasheet

Current PartRFQ

9250A-184-RC

Bourns Inc.In Stock: 11669250A-184-RC Datasheet

DirectRFQ

ER1641-184KM

API Delevan Inc.In Stock: 790ER1641-184KM Datasheet

SimilarRFQ

ER1641-184KP

API Delevan Inc.In Stock: 921ER1641-184KP Datasheet

SimilarRFQ

ER1641-184KR

API Delevan Inc.In Stock: 813ER1641-184KR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 9250-184 is determined by strict equivalence across the following critical parameters:

• Inductance value: 180 µH with ±10% tolerance
• Current rating: 135 mA minimum
• DC resistance: 4.4 Ohm maximum
• Shielding: Shielded construction required
• Core material: Ferrite
• Mounting configuration: Through-hole axial
• Physical dimensions: 0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)
• Frequency characteristics: Q @ 790 kHz and self-resonant frequency at 8 MHz

All substitute parts listed maintain these electrical and mechanical specifications. Differences in product status, RoHS compliance, and operating temperature range are noted but do not affect functional interchangeability within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 9250A-184-RC is the primary recommended substitute for the obsolete Bourns 9250-184. Both components are manufactured by Bourns Inc., ensuring design continuity and supply chain consistency. The 9250A-184-RC maintains all electrical specifications while offering ROHS3 compliance and an extended operating temperature range to 125°C. This part is actively produced and available in bulk packaging.

The API Delevan ER1641-184KM, ER1641-184KP, and ER1641-184KR series provide functionally equivalent alternatives from an established inductor manufacturer. All three API Delevan variants maintain identical electrical performance and physical dimensions. These parts are supplied in tape and reel packaging suitable for automated assembly processes. Selection among the three API Delevan options depends on packaging and inventory requirements rather than electrical performance.

For applications requiring RoHS3 compliance, the Bourns 9250A-184-RC is the only compliant option among the listed substitutes. For applications operating at temperatures above 105°C but below 125°C, the Bourns 9250A-184-RC provides the extended thermal capability.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 9250A-184-RC directly replace the Bourns 9250-184 in existing designs?

A: Yes. The 9250A-184-RC maintains all critical electrical specifications including inductance, current rating, DC resistance, and frequency characteristics. The primary differences are product status (active vs. obsolete), RoHS compliance, and extended temperature range. Physical dimensions and mounting configuration are identical, enabling direct PCB substitution.

Q: What is the difference between the Bourns 9250-184 and the Bourns 9250A-184-RC construction?

A: The 9250-184 uses drum core wirewound construction, while the 9250A-184-RC uses molded construction. Both employ ferrite cores and shielding. The molded design of the 9250A-184-RC provides improved mechanical robustness and is the current production standard for this inductance value.

Q: Are the API Delevan ER1641 series parts electrically equivalent to the Bourns parts?

A: Yes. The ER1641-184KM, ER1641-184KP, and ER1641-184KR maintain all specified electrical parameters: 180 µH inductance, 135 mA current rating, 4.4 Ohm maximum DC resistance, and identical frequency characteristics. Physical dimensions and axial through-hole mounting are identical.

Q: What distinguishes the three API Delevan ER1641 variants from each other?

A: The ER1641-184KM, ER1641-184KP, and ER1641-184KR are electrically and mechanically identical. Differences are limited to packaging designations and inventory availability. Selection should be based on procurement and assembly process requirements.

Q: Does packaging format affect electrical performance?

A: No. Bulk packaging (Bourns 9250A-184-RC) and tape & reel packaging (API Delevan ER1641 series) do not affect electrical characteristics. Packaging selection depends on assembly automation requirements and inventory management practices.

Q: What is the saturation current specification, and why is it missing from some parts?

A: Saturation current (Isat) indicates the current level at which inductance begins to degrade. The Bourns 9250-184 specifies 85 mA saturation current. The API Delevan ER1641 series does not provide this specification in the available data. Both part families operate safely within the 135 mA continuous current rating.

Q: Can these inductors be used in applications requiring temperatures above 105°C?

A: The Bourns 9250A-184-RC operates to 125°C and is suitable for elevated temperature applications within this range. The Bourns 9250-184 and all API Delevan ER1641 variants are rated to 105°C maximum and should not be used above this temperature.