Bourns 9250-276 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-276 is a 27 mH shielded drum core wirewound inductor rated for 16 mA maximum current with 308 Ohm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The substitute part maintains the same inductance value, tolerance, and core shielding characteristics while offering improved current handling capacity and extended operating temperature range.

Substiute Parts

9250-276

Bourns Inc.In Stock: 9679250-276 Datasheet

Current PartRFQ

4307-276K

API Delevan Inc.In Stock: 8464307-276K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The API Delevan 4307-276K qualifies as a direct substitute based on the following critical parameters:

• Inductance Match: Both parts specify 27 mH with ±10% tolerance at 79 kHz test frequency
• DC Resistance Match: Both maintain 308 Ohm maximum DC resistance
• Shielding Configuration: Both employ ferrite core shielding for EMI suppression
• Saturation Current: Both rated at 8 mA saturation current
• Q Factor: Both measure 27 @ 79 kHz
• Mounting and Package: Both are through-hole axial components
• Electrical Compliance: Both are RoHS non-compliant and REACH unaffected with identical HTSUS classification

The substitute part exceeds the original specification in current rating capacity (31 mA versus 16 mA) and operating temperature range (-55°C ~ 125°C versus -55°C ~ 105°C), providing enhanced performance margins without compromising the core electrical characteristics required for circuit function.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 4307-276K is the qualified substitute for the obsolete Bourns 9250-276. Selection is based on:

• Product Status: The substitute is active production status, ensuring long-term availability and supply chain stability
• Electrical Equivalence: Identical inductance, tolerance, DC resistance, and Q factor specifications confirm functional compatibility in circuit applications
• Compliance Alignment: Both parts share identical RoHS and REACH compliance status, maintaining regulatory consistency in existing designs
• Performance Enhancement: The substitute provides higher current rating capacity and extended temperature range, offering design margin improvements without specification compromise
• Physical Compatibility: Axial through-hole package configuration ensures mechanical fit in existing PCB layouts

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4307-276K directly replace the Bourns 9250-276 in existing designs?

A: Yes. Both parts specify identical inductance (27 mH ±10%), DC resistance (308 Ohm max), and Q factor (27 @ 79 kHz). The substitute maintains through-hole axial package compatibility and ferrite core shielding configuration. The higher current rating and extended temperature range of the substitute do not create incompatibility.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete versus active), current rating (16 mA versus 31 mA), self-resonant frequency (210 kHz versus 400 kHz), and operating temperature range (-55°C ~ 105°C versus -55°C ~ 125°C). The substitute provides enhanced performance margins.

Q: Are there packaging differences between these inductors?

A: The Bourns 9250-276 uses through-hole axial packaging without specified tape and reel configuration. The API Delevan 4307-276K is supplied in Tape & Reel (TR) packaging. Both maintain identical axial form factor for PCB mounting compatibility.

Q: Do these parts have the same compliance certifications?

A: Both parts are RoHS non-compliant and REACH unaffected with identical HTSUS classification (8504.50.8000) and ECCN designation (EAR99). Regulatory compliance status is equivalent.

Q: What is the saturation current specification, and is it the same for both parts?

A: Both the Bourns 9250-276 and API Delevan 4307-276K specify 8 mA saturation current (Isat). This parameter is identical across both components.