Bourns 9250-822-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250-822-RC 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 production and maintenance applications. The 9250 series has been superseded by the 9250A series and compatible alternatives from API Delevan Inc., which maintain the same electrical specifications while offering improved availability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 active product status.

Key Parameters

Parameter	Value
Inductance	8.2 µH
Inductance Tolerance	±10%
Current Rating	250 mA
DC Resistance (Max)	1.32Ohm
Shielding	Shielded
Q Factor @ 7.9 MHz	50
Self Resonant Frequency	50 MHz
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Operating Temperature Range	-55°C ~ 105°C

Substitute Part Grouping Explanation

Substitution eligibility for the 9250-822-RC is determined by strict equivalence across the following critical parameters: inductance value (8.2 µH), inductance tolerance (±10%), current rating (minimum 250 mA), DC resistance (1.32Ohm maximum), shielding type (shielded), Q factor (50 @ 7.9 MHz), self-resonant frequency (50 MHz), mounting configuration (through-hole axial), and physical dimensions (0.162" Dia x 0.410" L).

The substitute parts are grouped into two categories:

Direct Equivalent (Bourns 9250A Series): The 9250A-822-RC maintains identical electrical specifications and physical form factor. The primary difference is the construction type (molded versus drum core) and extended operating temperature range (-55°C ~ 125°C versus -55°C ~ 105°C). This part is active and RoHS3 compliant.

Compatible Alternatives (API Delevan ER1641 Series): The ER1641-822KM, ER1641-822KP, and ER1641-822KR maintain equivalent inductance, tolerance, DC resistance, Q factor, and self-resonant frequency. These parts feature iron core construction instead of ferrite and operate within the -55°C ~ 105°C range. Current rating is 245 mA, which is within acceptable tolerance for most applications requiring 250 mA rated components. These parts are supplied in tape and reel packaging and are not RoHS3 compliant.

Parameter Comparison

Parameter	9250-822-RC (Main)	9250A-822-RC	ER1641-822KM	ER1641-822KP	ER1641-822KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	8.2 µH	8.2 µH	8.2 µH	8.2 µH	8.2 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	250 mA	250 mA	245 mA	245 mA	245 mA
DC Resistance (Max)	1.32Ohm	1.32Ohm	1.32Ohm	1.32Ohm	1.32Ohm
Q @ 7.9 MHz	50	50	50	50	50
Self Resonant Frequency	50 MHz	50 MHz	50 MHz	50 MHz	50 MHz
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Core Material	Ferrite	Ferrite	Iron	Iron	Iron
Type	Drum Core, Wirewound	Molded	Molded	Molded	Molded
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
Packaging	Bulk	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Inventory Status	845 Pcs New Original In Stock	670 Pcs New Original In Stock	760 Pcs New Original In Stock	722 Pcs New Original In Stock	800 Pcs New Original In Stock

Engineering Selection Recommendations

For RoHS3 Compliant Applications: The Bourns 9250A-822-RC is the primary substitute for the obsolete 9250-822-RC. Both parts maintain ferrite core construction, identical electrical specifications, and RoHS3 compliance. The 9250A series offers extended operating temperature capability (-55°C ~ 125°C) and active product status, ensuring long-term availability. This part is supplied in bulk packaging.

For Applications with Relaxed RoHS Requirements: The API Delevan ER1641 series (ER1641-822KM, ER1641-822KP, ER1641-822KR) provides functional equivalence with iron core construction. These parts maintain the same inductance, tolerance, DC resistance, Q factor, and self-resonant frequency. The 245 mA current rating is 2% lower than the 250 mA specification of the main part; this difference is acceptable for circuits designed with adequate current margin. These parts are supplied in tape and reel packaging and are not RoHS3 compliant. All three variants are active products with equivalent electrical performance; selection among them depends on packaging and inventory requirements.

Temperature Considerations: Applications operating above 105°C should prioritize the 9250A-822-RC due to its extended temperature range. Applications limited to -55°C ~ 105°C may use any substitute without thermal derating.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-822-RC directly replace the obsolete 9250-822-RC?

A: Yes. The 9250A-822-RC maintains identical inductance (8.2 µH), tolerance (±10%), current rating (250 mA), DC resistance (1.32Ohm maximum), Q factor (50 @ 7.9 MHz), self-resonant frequency (50 MHz), shielding, mounting type (through-hole axial), and physical dimensions (0.162" Dia x 0.410" L). The primary differences are construction type (molded versus drum core) and extended operating temperature range (-55°C ~ 125°C). Both parts are RoHS3 compliant.

Q: What is the difference between the Bourns 9250A and API Delevan ER1641 series?

A: Both maintain equivalent electrical specifications. The primary differences are core material (ferrite in 9250A versus iron in ER1641), RoHS compliance (9250A is RoHS3 compliant; ER1641 is not), current rating (250 mA in 9250A versus 245 mA in ER1641), and packaging (bulk for 9250A versus tape and reel for ER1641). The 245 mA rating of the ER1641 series is acceptable for applications designed with adequate current margin.

Q: Are the three ER1641 variants (KM, KP, KR) electrically identical?

A: Yes. The ER1641-822KM, ER1641-822KP, and ER1641-822KR are electrically equivalent. Selection among them depends on packaging requirements and inventory availability.

Q: What is the impact of the 245 mA current rating in the ER1641 series versus the 250 mA rating of the main part?

A: The 245 mA rating represents a 2% reduction. This difference is acceptable for circuits designed with adequate current margin. Applications operating at or near the 250 mA limit should use the 9250A-822-RC or original 9250-822-RC stock.

Q: Does core material (ferrite versus iron) affect circuit performance?

A: Core material affects frequency response characteristics and temperature stability. Ferrite cores (9250-822-RC and 9250A-822-RC) and iron cores (ER1641 series) maintain the same specified Q factor (50 @ 7.9 MHz) and self-resonant frequency (50 MHz). Substitution is valid for applications where these parameters are the primary design criteria.

Q: What packaging options are available?

A: The 9250-822-RC and 9250A-822-RC are supplied in bulk packaging. The ER1641 series (KM, KP, KR) is supplied in tape and reel (TR) packaging. Selection depends on assembly process requirements and volume.

Q: Are all substitute parts suitable for high-temperature applications?

A: The 9250A-822-RC operates to 125°C, providing the widest temperature range. The original 9250-822-RC and all ER1641 variants operate to 105°C. Applications requiring operation above 105°C must use the 9250A-822-RC.

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