Equivalent & Substitute Parts for Bourns 9250-682

Part Overview

The Bourns 9250-682 is a 6.8 µH shielded drum core wirewound inductor rated for 280 mA with a maximum DC resistance of 1.02Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. Substitute parts must maintain electrical performance across the specified operating temperature range of -55°C to 105°C while meeting mechanical compatibility requirements for axial through-hole applications.

Substiute Parts

9250-682

Bourns Inc.In Stock: 10189250-682 Datasheet

Current PartRFQ

1641R-682K

API Delevan Inc.In Stock: 16681641R-682K Datasheet

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ER1641-682KM

DelevanIn Stock: 1222ER1641-682KM Datasheet

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ER1641-682KP

API Delevan Inc.In Stock: 811ER1641-682KP Datasheet

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ER1641-682KR

API Delevan Inc.In Stock: 1119ER1641-682KR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Inductance Value: 6.8 µH with ±10% tolerance
• Current Rating: Minimum 280 mA saturation capability
• DC Resistance: Maximum 1.02Ohm
• Shielding Configuration: Shielded or unshielded designation
• Frequency Response: Q factor of 50 @ 7.9 MHz and self-resonant frequency of 55 MHz
• Operating Temperature: -55°C to 105°C
• Mounting Configuration: Through-hole axial package with matching physical dimensions (0.162" Dia × 0.410" L)

The substitute parts listed below meet these electrical and mechanical criteria. Variations in core material (ferrite, iron, phenolic) and construction type (drum core, molded) are permitted provided all electrical specifications remain within tolerance. Packaging format differences (bulk versus tape & reel) do not affect electrical equivalence but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

API Delevan 1641R-682K is the primary substitute for new designs and production transitions. This part is actively manufactured, ROHS3 compliant, and provides a 5 mA current rating margin above the original specification. Bulk packaging is suitable for high-volume assembly operations.

Delevan ER1641-682KM and API Delevan ER1641-682KP are functionally equivalent alternatives available in tape & reel packaging, appropriate for automated pick-and-place assembly processes. Both maintain the original 280 mA current rating and electrical specifications. Phenolic core construction differs from the original ferrite drum core but delivers equivalent performance within the specified parameter envelope.

API Delevan ER1641-682KR provides an unshielded alternative for applications where electromagnetic shielding is not required. This part is qualified to MIL-PRF-39010/02 military specifications and uses iron core construction. Selection of this variant should be limited to circuits where shielding is not a functional requirement, as removal of shielding may alter electromagnetic coupling characteristics in sensitive RF or mixed-signal applications.

All substitute parts maintain RoHS compliance status or are non-compliant consistent with the original component. Compliance requirements should be verified against end-product regulatory obligations before final selection.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1641R-682K replace the Bourns 9250-682 in existing designs?

A: Yes. The 1641R-682K meets all electrical specifications of the original part, including inductance, current rating, DC resistance, frequency response, and operating temperature range. Physical dimensions are identical, ensuring direct mechanical compatibility in through-hole axial mounting applications. The 5 mA current rating increase provides additional design margin.

Q: What is the difference between shielded and unshielded variants?

A: The Bourns 9250-682 and most substitute parts (1641R-682K, ER1641-682KM, ER1641-682KP) are shielded, reducing electromagnetic radiation and susceptibility to external fields. The ER1641-682KR is unshielded and should only be used in applications where shielding is not functionally required. Shielding affects EMI performance and should not be changed without circuit-level analysis.

Q: Does packaging format (bulk versus tape & reel) affect electrical performance?

A: No. Bulk and tape & reel packaging formats contain identical electrical components. Packaging selection is determined by assembly process requirements and procurement logistics, not electrical equivalence.

Q: Are all substitute parts RoHS compliant?

A: The API Delevan 1641R-682K is ROHS3 compliant. The Delevan ER1641-682KM, API Delevan ER1641-682KP, and API Delevan ER1641-682KR are RoHS non-compliant, matching the compliance status of the original Bourns 9250-682. Regulatory compliance requirements should be confirmed for the end application before part selection.

Q: Can I use the ER1641-682KR military-grade part as a direct substitute?

A: The ER1641-682KR meets all electrical specifications and is qualified to MIL-PRF-39010/02 standards. However, it is unshielded, which may affect performance in applications sensitive to electromagnetic interference. Use this variant only when shielding is not a design requirement and military qualification is beneficial.

Q: What core material differences exist among the substitute parts?

A: The original Bourns 9250-682 uses ferrite drum core construction. Substitute parts employ ferrite (1641R-682K), phenolic (ER1641-682KM, ER1641-682KP), or iron (ER1641-682KR) core materials. All deliver equivalent electrical performance within the specified parameter tolerances. Core material selection does not affect substitution eligibility provided electrical specifications remain within tolerance.