Bourns 9250-331-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250-331-RC is a 330 nH shielded drum core wirewound inductor rated for 780 mA with a maximum DC resistance of 130 mOhm. This through-hole axial component operates across -55°C to 105°C and features ferrite core construction with ±10% inductance tolerance. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	330 nH
Current Rating	780 mA
DC Resistance (Max)	130 mOhm
Shielding	Shielded
Q Factor @ 25 MHz	46
Self Resonant Frequency	250 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.162" Dia × 0.410" L (4.11 mm × 10.41 mm)

Substitute Part Grouping Explanation

Substitution eligibility for the 9250-331-RC is determined by the following critical parameters:

Inductance Value: 330 nH ±10%
Current Rating: 780 mA minimum
DC Resistance: 130 mOhm maximum
Shielding: Shielded configuration required
Frequency Response: Q factor of 46 @ 25 MHz and self-resonant frequency of 250 MHz
Mounting & Package: Through-hole axial configuration with matching physical dimensions (0.162" Dia × 0.410" L)

The substitute parts listed maintain electrical equivalence across these parameters. Variations in core material (ferrite vs. phenolic), construction type (drum core vs. molded), and operating temperature range do not affect functional substitutability within the specified electrical envelope.

Parameter Comparison

Parameter	9250-331-RC (Main)	9250A-331-RC	ER1641-331KM	ER1641-331KP	ER1641-331KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	330 nH	330 nH	330 nH	330 nH	330 nH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating	780 mA	780 mA	780 mA	780 mA	780 mA
DC Resistance (Max)	130 mOhm	130 mOhm	130 mOhm	130 mOhm	130 mOhm
Q @ 25 MHz	46	46	46	46	46
Self Resonant Frequency	250 MHz	250 MHz	250 MHz	250 MHz	250 MHz
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
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	Axial	Axial	Axial	Axial	Axial
Physical Dimensions	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L
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 Substitute: Bourns 9250A-331-RC

The 9250A-331-RC is the direct successor to the 9250-331-RC within the Bourns product line. Both parts maintain identical electrical specifications and physical dimensions. The 9250A-331-RC offers an extended operating temperature range (-55°C to 125°C vs. -55°C to 105°C) and is classified as active product status, ensuring long-term availability. Both parts are ROHS3 compliant. This part is recommended as the primary replacement for new designs and production continuity.

Secondary Substitutes: API Delevan ER1641 Series (ER1641-331KM, ER1641-331KP, ER1641-331KR)

The ER1641 series inductors from API Delevan Inc. provide electrical equivalence across all critical parameters: 330 nH inductance, 780 mA current rating, 130 mOhm maximum DC resistance, and identical frequency response characteristics. These parts are available in active product status with higher inventory levels. However, these parts are classified as RoHS non-compliant and feature phenolic core construction compared to the ferrite core of the original part. Selection of ER1641 variants should be based on specific application requirements regarding RoHS compliance and regulatory constraints.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-331-RC be used as a direct replacement for the 9250-331-RC?

A: Yes. The 9250A-331-RC maintains identical electrical specifications, physical dimensions, and mounting configuration. The extended operating temperature range of the 9250A-331-RC (-55°C to 125°C) provides additional thermal margin compared to the original part (-55°C to 105°C). Both parts are ROHS3 compliant.

Q: What is the difference between the Bourns 9250A-331-RC and the API Delevan ER1641 series?

A: Both product families meet the electrical requirements of 330 nH inductance, 780 mA current rating, and 130 mOhm maximum DC resistance. The primary differences are: manufacturer (Bourns vs. API Delevan), core material (ferrite vs. phenolic), and RoHS compliance status (ROHS3 compliant vs. non-compliant). The ER1641 series is available in higher quantities and offers equivalent electrical performance within the specified frequency range.

Q: Are there any packaging differences between these substitute parts?

A: The 9250-331-RC is supplied in bulk packaging. The 9250A-331-RC is available in bulk packaging. The ER1641 series (ER1641-331KM, ER1641-331KP, ER1641-331KR) are supplied in tape and reel format. All parts share identical through-hole axial package configuration and physical dimensions (0.162" Dia × 0.410" L).

Q: Which substitute should be selected for RoHS-compliant applications?

A: Both the Bourns 9250-331-RC and 9250A-331-RC are ROHS3 compliant. The API Delevan ER1641 series parts are RoHS non-compliant. For applications requiring RoHS compliance, select either the 9250-331-RC or 9250A-331-RC.

Q: Do all substitute parts operate across the same temperature range?

A: The 9250-331-RC and ER1641 series operate from -55°C to 105°C. The 9250A-331-RC extends this range to -55°C to 125°C. Verify application temperature requirements before selection.

Q: Are the electrical characteristics identical across all substitute parts?

A: Yes. All listed parts maintain 330 nH inductance (±10%), 780 mA current rating, 130 mOhm maximum DC resistance, Q factor of 46 @ 25 MHz, and self-resonant frequency of 250 MHz. These parameters define functional equivalence for substitution purposes.

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