Bourns 9250-681 680 nH Shielded Drum Core Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9250-681 is a 680 nH shielded drum core wirewound inductor rated for 420 mA with a maximum DC resistance of 450 mOhm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring low inductance values with controlled impedance characteristics at RF frequencies.

The 9250-681 carries an obsolete product status. Equivalent and substitute parts are available from both Bourns and API Delevan Inc., offering active product alternatives with maintained electrical specifications and improved compliance certifications.

Substiute Parts

9250-681

Bourns Inc.In Stock: 11889250-681 Datasheet

Current PartRFQ

9250A-681-RC

Bourns Inc.In Stock: 7469250A-681-RC Datasheet

DirectRFQ

ER1641-681KM

API Delevan Inc.In Stock: 933ER1641-681KM Datasheet

SimilarRFQ

ER1641-681KP

API Delevan Inc.In Stock: 792ER1641-681KP Datasheet

SimilarRFQ

ER1641-681KR

API Delevan Inc.In Stock: 763ER1641-681KR Datasheet

SimilarRFQ

ER1641-681KS

API Delevan Inc.In Stock: 812ER1641-681KS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9250-681 is determined by strict equivalence across the following electrical and mechanical parameters:

• Inductance value: 680 nH ±10%
• Current rating: 420 mA minimum
• DC resistance: 450 mOhm maximum
• Q factor @ 25 MHz: 42
• Self resonant frequency: 190 MHz
• Shielding: Shielded configuration
• Mounting: Through-hole axial package
• Physical dimensions: 0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)

All substitute parts listed maintain these core electrical specifications. Variations in core material (ferrite vs. phenolic), construction type (drum core vs. molded), and packaging format (bulk vs. tape & reel) do not affect functional equivalence within the specified parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 9250A-681-RC represents the direct successor to the obsolete 9250-681. Both components share identical electrical specifications and physical dimensions. The 9250A-681-RC offers an extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) and carries ROHS3 compliance, making it the preferred choice for new designs and production transitions from the legacy 9250-681.

The API Delevan ER1641 series (ER1641-681KM, ER1641-681KP, ER1641-681KR, ER1641-681KS) provides functionally equivalent alternatives with identical electrical performance across all specified parameters. These components maintain the same inductance, current rating, DC resistance, Q factor, and self-resonant frequency. The ER1641 series uses phenolic core material and molded construction, contrasting with the ferrite drum core design of the Bourns parts. All ER1641 variants are active products available in tape & reel packaging.

Selection between Bourns and API Delevan alternatives depends on supply chain requirements, packaging format preferences, and compliance certifications applicable to the end application. The Bourns 9250A-681-RC is recommended for applications requiring RoHS3 compliance and extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-681-RC directly replace the obsolete 9250-681?

A: Yes. The 9250A-681-RC maintains all electrical specifications of the 9250-681 and shares identical physical dimensions. The primary differences are product status (active vs. obsolete), RoHS compliance (ROHS3 vs. non-compliant), and extended operating temperature range (-55°C to 125°C vs. -55°C to 105°C).

Q: Are the API Delevan ER1641 series parts electrically equivalent to the Bourns 9250-681?

A: Yes. The ER1641-681KM, ER1641-681KP, ER1641-681KR, and ER1641-681KS all meet the specified electrical parameters: 680 nH inductance, 420 mA current rating, 450 mOhm maximum DC resistance, 42 Q factor at 25 MHz, and 190 MHz self-resonant frequency. Physical dimensions are identical.

Q: What is the difference between the ER1641 variants (KM, KP, KR, KS)?

A: All four ER1641 variants share identical electrical and mechanical specifications. The letter suffix designates different packaging or lead configurations within the API Delevan product line. Selection among these variants depends on specific procurement or assembly requirements.

Q: Does core material affect substitution eligibility?

A: No. The 9250-681 uses ferrite core material while the ER1641 series uses phenolic core material. Both core types deliver the specified electrical performance within the defined parameter tolerances. Core material differences do not prevent functional substitution.

Q: What packaging formats are available?

A: The Bourns 9250A-681-RC is supplied in bulk packaging. The API Delevan ER1641 series (all variants) is supplied in tape & reel format. Both packaging formats are suitable for through-hole assembly; selection depends on production volume and assembly equipment compatibility.

Q: Are there temperature range limitations when substituting parts?

A: The 9250-681 and ER1641 series operate across -55°C to 105°C. The 9250A-681-RC extends to -55°C to 125°C. For applications operating above 105°C, the 9250A-681-RC is the only listed option. For applications within -55°C to 105°C, all parts are equivalent.