Bourns 9250-183-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250-183-RC is an 18 µH shielded drum core wirewound inductor rated for 300 mA with a maximum DC resistance of 890 mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 105°C and is ROHS3 compliant.

Key Parameters

Parameter	Value
Inductance	18 µH
Inductance Tolerance	±10%
Current Rating	300 mA
Current - Saturation (Isat)	235 mA
DC Resistance (DCR)	890 mOhm Max
Shielding	Shielded
Core Material	Ferrite
Q @ 2.5 MHz	45
Self Resonant Frequency	45 MHz
Operating Temperature Range	-55°C ~ 105°C
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 9250-183-RC is determined by the following critical parameters: inductance value (18 µH), inductance tolerance (±10%), current rating (300 mA), DC resistance (890 mOhm maximum), shielding type (shielded), core material (ferrite), package type (axial through-hole), and physical dimensions (0.162" Dia x 0.410" L).

The substitute parts are grouped into two categories:

Direct Manufacturer Substitute: The 9250A-183-RC from Bourns Inc. represents the active production equivalent, utilizing molded construction instead of drum core design while maintaining identical electrical specifications and physical dimensions.

Cross-Manufacturer Equivalents: The ER1641 series from Delevan and API Delevan Inc. (part numbers ER1641-183KM, ER1641-183KP, ER1641-183KR) provide functional equivalence with matching electrical parameters and identical physical form factor, though with different packaging configurations (Tape & Reel).

Parameter Comparison

Parameter	9250-183-RC (Main)	9250A-183-RC	ER1641-183KM	ER1641-183KP	ER1641-183KR
Manufacturer	Bourns Inc.	Bourns Inc.	Delevan	API Delevan Inc.	Delevan
Inductance	18 µH	18 µH	18 µH	18 µH	18 µH
Inductance Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	300 mA	300 mA	300 mA	300 mA	300 mA
DC Resistance (DCR)	890 mOhm Max	890 mOhm Max	890 mOhm Max	890 mOhm Max	890 mOhm Max
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Q @ 2.5 MHz	45	45	45	45	45
Self Resonant Frequency	45 MHz	45 MHz	45 MHz	45 MHz	45 MHz
Operating Temperature Range	-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

Engineering Selection Recommendations

Primary Recommendation: The Bourns 9250A-183-RC is the preferred substitute for new designs and production transitions. This part maintains active product status, offers an extended operating temperature range to 125°C, and retains ROHS3 compliance. The molded construction provides equivalent electrical performance with identical physical dimensions and mounting compatibility.

Secondary Options: The Delevan ER1641 series (ER1641-183KM, ER1641-183KP, ER1641-183KR) provides functional equivalence with matching electrical specifications and form factor. These parts are available in Tape & Reel packaging for automated assembly. Note that these alternatives are RoHS non-compliant, which may impact suitability for applications requiring regulatory compliance.

Compliance Considerations: Applications requiring ROHS3 compliance should utilize the Bourns 9250A-183-RC. Applications without RoHS requirements may consider the Delevan ER1641 series based on packaging and availability needs.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-183-RC directly replace the 9250-183-RC in existing designs?

A: Yes. The 9250A-183-RC maintains identical electrical specifications (18 µH, 300 mA, 890 mOhm DCR), shielding characteristics, and physical dimensions (0.162" Dia x 0.410" L). The primary difference is construction type (molded versus drum core) and extended temperature rating (-55°C to 125°C versus -55°C to 105°C). PCB layout and mounting remain unchanged.

Q: What are the differences between Bourns and Delevan substitutes?

A: The Bourns 9250A-183-RC is the direct manufacturer evolution with active product status and ROHS3 compliance. The Delevan ER1641 series provides electrical equivalence but differs in packaging (Tape & Reel versus bulk), RoHS compliance status (non-compliant), and manufacturer. All maintain identical inductance, current rating, DC resistance, and physical dimensions.

Q: Are the ER1641 series parts suitable for RoHS-regulated applications?

A: No. The ER1641-183KM, ER1641-183KP, and ER1641-183KR are RoHS non-compliant. Applications requiring RoHS compliance must use the Bourns 9250A-183-RC.

Q: Does packaging type affect electrical performance?

A: No. Packaging differences (bulk versus Tape & Reel) do not affect electrical characteristics. Selection should be based on assembly process requirements and compliance mandates.

Q: Are all substitutes rated for the same current levels?

A: Yes. All listed substitutes maintain a 300 mA current rating with 235 mA saturation current and 890 mOhm maximum DC resistance.

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