Bourns 9250-221 220 nH Shielded Drum Core Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9250-221 is a 220 nH shielded drum core wirewound inductor rated for 1.1 A with a maximum DC resistance of 67 mOhm. This component operates across a temperature range of -55°C to 105°C and features ferrite core construction with axial through-hole mounting. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Inductance	220 nH
Tolerance	±10%
Current Rating	1.1 A
DC Resistance (Max)	67 mOhm
Shielding	Shielded
Q @ 25 MHz	49
Self Resonant Frequency	250 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole, Axial
Package Dimensions	0.162" Dia × 0.410" L (4.11 mm × 10.41 mm)

Substitute Part Grouping Explanation

Substitution for the Bourns 9250-221 is determined by strict equivalence across the following electrical and mechanical parameters:

Inductance value: 220 nH ±10%
Current rating: minimum 1.1 A
DC resistance: maximum 67 mOhm
Shielding: shielded construction required
Q factor @ 25 MHz: 49
Self resonant frequency: 250 MHz
Mounting: through-hole axial configuration
Physical dimensions: 0.162" diameter × 0.410" length (4.11 mm × 10.41 mm)
Operating temperature: -55°C minimum to 105°C minimum

Substitute parts are grouped into two categories: direct manufacturer equivalents from Bourns Inc. and cross-manufacturer alternatives from API Delevan Inc. All listed substitutes maintain electrical performance within the specified parameters and physical compatibility with the original design.

Parameter Comparison

Part Number	Manufacturer	Type	Core Material	Inductance	Current Rating	DCR (Max)	Q @ 25 MHz	SRF	Temp Range	Status	Packaging
9250-221	Bourns Inc.	Drum Core, Wirewound	Ferrite	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 105°C	Obsolete	Bulk
9250A-221-RC	Bourns Inc.	Molded	Ferrite	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 125°C	Active	Bulk
1641R-221K	API Delevan Inc.	Molded	Phenolic	220 nH	1.12 A	67 mOhm	49	250 MHz	-55°C to 105°C	Active	Bulk
ER1641-221KM	API Delevan Inc.	Molded	Phenolic	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-221KP	API Delevan Inc.	Molded	Phenolic	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-221KR	API Delevan Inc.	Molded	Phenolic	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-221KS	API Delevan Inc.	Molded	Phenolic	220 nH	1.1 A	67 mOhm	49	250 MHz	-55°C to 105°C	Active	Tape & Reel

Engineering Selection Recommendations

The Bourns 9250A-221-RC is the primary direct substitute, offering identical electrical specifications with extended operating temperature range (-55°C to 125°C) and active product status. This part is ROHS3 compliant and available in bulk packaging, making it suitable for direct replacement in existing designs.

For applications requiring active product status with alternative sourcing, the API Delevan ER1641 series (ER1641-221KM, ER1641-221KP, ER1641-221KR, ER1641-221KS) provides electrical equivalence with phenolic core construction. These parts are available in tape and reel packaging and maintain the same inductance, current rating, and DC resistance specifications. The ER1641-221KM variant is available in tape and reel format for automated assembly processes.

The API Delevan 1641R-221K offers bulk packaging with a slightly elevated current rating of 1.12 A, providing additional margin in high-current applications while maintaining all other electrical parameters.

All substitute parts maintain RoHS compliance status, REACH unaffected designation, and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 9250-221 be directly replaced with the 9250A-221-RC?

A: Yes. The 9250A-221-RC maintains identical inductance (220 nH), current rating (1.1 A), DC resistance (67 mOhm), Q factor (49 @ 25 MHz), and self-resonant frequency (250 MHz). The primary differences are construction type (molded vs. drum core), extended temperature range (-55°C to 125°C vs. -55°C to 105°C), and active product status. Physical dimensions and mounting configuration are identical.

Q: What is the difference between bulk and tape & reel packaging?

A: Bulk packaging is suitable for manual assembly and lower-volume production. Tape & reel packaging is designed for automated pick-and-place assembly equipment and high-volume manufacturing. Electrical specifications remain identical regardless of packaging format.

Q: Are the API Delevan ER1641 series parts electrically equivalent?

A: Yes. The ER1641-221KM, ER1641-221KP, ER1641-221KR, and ER1641-221KS variants all maintain 220 nH inductance, 1.1 A current rating, 67 mOhm maximum DC resistance, 49 Q factor @ 25 MHz, and 250 MHz self-resonant frequency. Core material differs (phenolic vs. ferrite), but electrical performance parameters are equivalent.

Q: Does the 1641R-221K from API Delevan meet the original specifications?

A: Yes. The 1641R-221K maintains all critical electrical parameters: 220 nH inductance, 67 mOhm DC resistance, 49 Q factor @ 25 MHz, and 250 MHz self-resonant frequency. Current rating is 1.12 A, which exceeds the 1.1 A requirement. Operating temperature range matches the original (-55°C to 105°C).

Q: What compliance certifications apply to these substitute parts?

A: The Bourns 9250A-221-RC is ROHS3 compliant. API Delevan ER1641 series parts are RoHS non-compliant. All parts are REACH unaffected and classified as EAR99 for export purposes. Verify compliance requirements for your specific application before selection.

Q: Are physical dimensions identical across all substitute parts?

A: Yes. All listed substitute parts maintain the same axial through-hole package dimensions: 0.162" diameter × 0.410" length (4.11 mm × 10.41 mm). Direct mechanical compatibility is maintained across all alternatives.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message