Bourns 9250-822 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-822 is an 8.2 µH shielded drum core wirewound inductor rated for 250 mA with a maximum DC resistance of 1.32Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 9250 series has been superseded by the 9250A series and compatible alternatives from API Delevan Inc., which maintain the same electrical specifications while offering improved availability and compliance status.

Substiute Parts

9250-822

Bourns Inc.In Stock: 9959250-822 Datasheet

Current PartRFQ

9250A-822-RC

Bourns Inc.In Stock: 7419250A-822-RC Datasheet

DirectRFQ

ER1641-822KM

API Delevan Inc.In Stock: 791ER1641-822KM Datasheet

SimilarRFQ

ER1641-822KP

API Delevan Inc.In Stock: 797ER1641-822KP Datasheet

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ER1641-822KR

API Delevan Inc.In Stock: 873ER1641-822KR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: inductance value (8.2 µH), tolerance (±10%), current rating (minimum 245 mA), DC resistance (1.32Ohm maximum), shielding type (shielded), frequency characteristics (Q @ 7.9MHz and self-resonant frequency at 50MHz), mounting type (through hole), and package format (axial). All substitute parts listed maintain these specifications within the allowed tolerances.

The 9250A-822-RC represents a direct upgrade path from the obsolete 9250-822, offering identical electrical performance with improved product status and RoHS3 compliance. The ER1641 series parts (ER1641-822KM, ER1641-822KP, ER1641-822KR) from API Delevan Inc. provide functional equivalence with a 5 mA reduction in current rating (245 mA versus 250 mA), which remains within acceptable operating margins for most applications requiring 8.2 µH inductance at this power level.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production requiring RoHS3 compliance, the Bourns 9250A-822-RC is the recommended primary substitute. It maintains full electrical equivalence to the 9250-822 while offering active product status, extended operating temperature range to 125°C, and regulatory compliance certification.

For applications where RoHS compliance is not required and cost optimization is prioritized, the API Delevan ER1641 series (ER1641-822KM, ER1641-822KP, ER1641-822KR) provides functional equivalence. The 5 mA reduction in current rating (245 mA versus 250 mA) is acceptable for circuits designed within standard safety margins. These parts are available in tape and reel packaging, suitable for automated assembly processes.

The choice between ER1641-822KM, ER1641-822KP, and ER1641-822KR is determined by packaging and supply chain requirements, as all three parts share identical electrical specifications and performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-822-RC be used as a direct replacement for the 9250-822?

A: Yes. The 9250A-822-RC maintains identical inductance (8.2 µH), tolerance (±10%), current rating (250 mA), DC resistance (1.32Ohm maximum), and frequency characteristics. The primary differences are improved product status (active versus obsolete), RoHS3 compliance, and extended operating temperature range to 125°C. Physical dimensions and axial through-hole mounting are identical.

Q: What is the significance of the 5 mA current rating difference in the ER1641 series?

A: The ER1641 series is rated for 245 mA versus the 250 mA rating of the 9250-822. This 2% reduction in maximum current capacity is within standard engineering margins and does not affect substitution eligibility for most applications. Circuit designs should be evaluated to confirm that operating current remains below 245 mA.

Q: Are the ER1641-822KM, ER1641-822KP, and ER1641-822KR electrically identical?

A: Yes. All three ER1641 variants share identical electrical specifications: 8.2 µH inductance, ±10% tolerance, 245 mA current rating, 1.32Ohm maximum DC resistance, and frequency characteristics. The part number suffix indicates packaging configuration or internal design variant. Selection is based on supply availability and assembly process requirements.

Q: What is the difference between drum core wirewound and molded construction?

A: The 9250-822 uses drum core wirewound construction, while the 9250A-822-RC and ER1641 series use molded construction. Both designs achieve the same electrical specifications and shielding performance. Molded construction offers improved mechanical robustness and is standard in active product lines.

Q: Can these inductors be used interchangeably in PCB designs?

A: Yes, provided the circuit operates within the specified current and temperature ranges. All substitute parts maintain identical axial through-hole mounting footprints (0.162" diameter x 0.410" length). Verify that operating current does not exceed 245 mA when using ER1641 series parts.

Q: What packaging formats are available?

A: The 9250-822 and 9250A-822-RC are supplied in bulk packaging. The ER1641 series (ER1641-822KM, ER1641-822KP, ER1641-822KR) is supplied in tape and reel format, suitable for automated pick-and-place assembly.