Bourns 9250-185 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-185 is a 1.8 mH shielded drum core wirewound inductor rated for 50 mA with a maximum DC resistance of 29.9 Ohm. This through-hole axial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance with ferrite core shielding.

The 9250-185 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

9250-185

Bourns Inc.In Stock: 7009250-185 Datasheet

Current PartRFQ

9250A-185-RC

Bourns Inc.In Stock: 16629250A-185-RC Datasheet

DirectRFQ

4307-185K

API Delevan Inc.In Stock: 6974307-185K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 9250-185 are identified based on the following critical parameters:

• Inductance value: 1.8 mH (exact match required)
• Tolerance: ±10% (exact match required)
• DC Resistance: 29.9 Ohm maximum (exact match required)
• Shielding: Shielded (required for EMI performance)
• Core Material: Ferrite (required for frequency response characteristics)
• Mounting Type: Through Hole (required for PCB compatibility)
• Package: Axial (required for form factor compatibility)

Two substitute parts meet these criteria with varying degrees of compatibility based on current rating and operating temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 9250A-185-RC is the primary direct substitute for the obsolete 9250-185. Both parts are manufactured by Bourns Inc. and share identical electrical specifications: 1.8 mH inductance, ±10% tolerance, 50 mA current rating, and 29.9 Ohm maximum DC resistance. The 9250A-185-RC features an extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) and is RoHS3 compliant, addressing regulatory requirements for new designs. Physical dimensions are identical, ensuring direct PCB compatibility. The 9250A-185-RC is currently in active production with confirmed inventory availability.

The API Delevan 4307-185K is a similar alternative that maintains the same inductance, tolerance, and DC resistance specifications. However, it features a higher current rating of 105 mA, a higher self-resonant frequency of 2.6 MHz, and larger physical dimensions (0.197" diameter versus 0.162"). The 4307-185K is suitable for applications where the increased current capacity and higher frequency response are beneficial, provided PCB layout accommodates the larger form factor. This part is also in active production status.

For new designs and production applications, the Bourns 9250A-185-RC is the recommended substitute due to its direct compatibility, improved compliance status, and extended temperature range. The API Delevan 4307-185K serves as an alternative where higher current capacity is required and physical space permits the larger package.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-185-RC be used as a direct replacement for the 9250-185?

A: Yes. The 9250A-185-RC is a direct substitute. Both parts share identical inductance (1.8 mH), tolerance (±10%), current rating (50 mA), DC resistance (29.9 Ohm maximum), and physical dimensions. The primary differences are improved RoHS compliance and extended operating temperature range on the 9250A-185-RC.

Q: What are the key differences between the 9250A-185-RC and 4307-185K?

A: The 9250A-185-RC and 4307-185K differ in current rating (50 mA versus 105 mA), self-resonant frequency (1 MHz versus 2.6 MHz), and physical dimensions (0.162" diameter versus 0.197" diameter). Both maintain the same inductance, tolerance, and DC resistance. The 4307-185K is suitable for applications requiring higher current capacity.

Q: Are there physical compatibility concerns when substituting the 4307-185K?

A: Yes. The 4307-185K has a larger diameter (0.197" versus 0.162") and length (0.447" versus 0.410"). PCB layout and component spacing must be verified before substitution to ensure the larger form factor does not create placement conflicts.

Q: What is the compliance status of these substitute parts?

A: The Bourns 9250A-185-RC is RoHS3 compliant. The API Delevan 4307-185K is RoHS non-compliant. For applications requiring RoHS compliance, the 9250A-185-RC is the appropriate selection.

Q: Can the 9250-185 be used in applications requiring operation above 105°C?

A: No. The 9250-185 is rated for -55°C to 105°C operation. For applications requiring extended temperature operation up to 125°C, the 9250A-185-RC or 4307-185K are suitable alternatives.