Equivalent & Substitute Parts for Bourns 9250-154

Part Overview

The Bourns 9250-154 is a 150 µH shielded drum core wirewound inductor rated for 140 mA with a maximum DC resistance of 4.1 Ohm. This through-hole axial component operates across -55°C to 105°C and features ferrite core construction with electromagnetic shielding. The 9250-154 is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts maintain identical electrical specifications while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Inductance	150 µH
Inductance Tolerance	±10%
Current Rating	140 mA
Current - Saturation (Isat)	90 mA
DC Resistance (DCR)	4.1 Ohm Max
Q @ Frequency	55 @ 790 kHz
Frequency - Self Resonant	8.5 MHz
Shielding	Shielded
Core Material	Ferrite
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Inductance Value: 150 µH ±10%
Current Rating: 140 mA minimum
DC Resistance: 4.1 Ohm maximum
Shielding: Shielded construction required
Core Material: Ferrite
Mounting Type: Through hole axial configuration
Physical Dimensions: 0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)
Frequency Characteristics: Q @ 790 kHz = 55; Self-resonant frequency = 8.5 MHz

All substitute parts listed maintain these electrical and mechanical specifications. Differences in product status, packaging format, and compliance certifications do not affect functional interchangeability in circuit applications.

Parameter Comparison

Parameter	9250-154 (Main)	9250A-154-RC	ER1641-154KM	ER1641-154KP	ER1641-154KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Series	9250	9250A	ER1641	ER1641	ER1641
Inductance	150 µH	150 µH	150 µH	150 µH	150 µH
Inductance Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	140 mA	140 mA	140 mA	140 mA	140 mA
Current - Saturation (Isat)	90 mA	90 mA	Not specified	Not specified	Not specified
DC Resistance (DCR)	4.1 Ohm Max	4.1 Ohm Max	4.1 Ohm Max	4.1 Ohm Max	4.1 Ohm Max
Q @ Frequency	55 @ 790 kHz	55 @ 790 kHz	55 @ 790 kHz	55 @ 790 kHz	55 @ 790 kHz
Frequency - Self Resonant	8.5 MHz	8.5 MHz	8.5 MHz	8.5 MHz	8.5 MHz
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Core Type	Drum Core, Wirewound	Molded	Molded	Molded	Molded
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 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 (4.11 mm x 10.41 mm)	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)	0.162" Dia x 0.410" L (4.11 mm x 10.41 mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
Packaging	Not specified	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Recommendation: Bourns 9250A-154-RC

The 9250A-154-RC is the direct successor to the obsolete 9250-154. Both components are manufactured by Bourns Inc. and maintain identical electrical specifications. The 9250A-154-RC offers active product status and ROHS3 compliance, making it the preferred choice for new designs and production continuity. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin. Bulk packaging is suitable for standard procurement workflows.

Secondary Recommendations: API Delevan ER1641 Series (ER1641-154KM, ER1641-154KP, ER1641-154KR)

The ER1641 series inductors from API Delevan Inc. provide functionally equivalent substitution with active product status. All three variants maintain the required electrical specifications and physical dimensions. These parts are supplied in tape and reel packaging, appropriate for automated assembly processes. Selection among ER1641-154KM, ER1641-154KP, and ER1641-154KR depends on packaging and inventory requirements; all three are electrically interchangeable.

Compliance Consideration

Applications requiring RoHS3 compliance must use the Bourns 9250A-154-RC. The API Delevan ER1641 series variants retain RoHS non-compliant status and are suitable only for applications without RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can the obsolete 9250-154 be directly replaced with the 9250A-154-RC?

A: Yes. The 9250A-154-RC is the active production equivalent. Both parts share identical inductance (150 µH), current rating (140 mA), DC resistance (4.1 Ohm max), frequency characteristics, and physical dimensions. The 9250A-154-RC is the recommended replacement for all applications previously using the 9250-154.

Q: What is the difference between the Bourns 9250A-154-RC and the API Delevan ER1641 series?

A: Both manufacturers' parts are electrically equivalent across all critical parameters. The primary differences are manufacturer origin and packaging format. The 9250A-154-RC is supplied in bulk packaging, while ER1641 variants use tape and reel. The 9250A-154-RC offers ROHS3 compliance; ER1641 variants do not. Selection depends on compliance requirements, packaging preferences, and supply chain considerations.

Q: Are the three API Delevan ER1641 variants (KM, KP, KR) interchangeable?

A: Yes. The ER1641-154KM, ER1641-154KP, and ER1641-154KR are electrically identical. All maintain 150 µH inductance, 140 mA current rating, 4.1 Ohm max DC resistance, and identical frequency characteristics. Differences are limited to packaging and inventory availability. Selection among these three variants does not affect circuit performance.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is valid when the following parameters match the original 9250-154: inductance value (150 µH ±10%), current rating (140 mA minimum), DC resistance (4.1 Ohm maximum), shielding (shielded), core material (ferrite), mounting type (through hole axial), physical dimensions (0.162" Dia x 0.410" L), and frequency characteristics (Q @ 790 kHz = 55; self-resonant frequency = 8.5 MHz). All listed substitutes meet these criteria.

Q: Does the extended operating temperature range of the 9250A-154-RC (-55°C to 125°C versus -55°C to 105°C) affect substitution?

A: No. The extended temperature range of the 9250A-154-RC is a performance enhancement that does not compromise compatibility. Applications operating within the original -55°C to 105°C range will function identically with either part. Applications requiring operation above 105°C benefit from the 9250A-154-RC's extended range.

Q: What packaging considerations apply when selecting a substitute?

A: The 9250A-154-RC is supplied in bulk packaging, suitable for manual assembly and standard procurement. The ER1641 series uses tape and reel packaging, optimized for automated pick-and-place assembly. Packaging selection should align with assembly process requirements and inventory management practices. Electrical performance is independent of packaging format.

Q: Is RoHS compliance a factor in selecting a substitute?

A: RoHS compliance is a regulatory and procurement consideration, not an electrical performance factor. The 9250A-154-RC is ROHS3 compliant and must be used in applications subject to RoHS requirements. The ER1641 series variants are RoHS non-compliant and are suitable only for applications without RoHS mandates. Verify regulatory requirements before final part selection.

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