Bourns 9250-392-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250-392-RC is a 3.9 µH shielded drum core wirewound inductor rated for 450 mA with a maximum DC resistance of 400 mOhm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance with ferrite core construction. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	3.9 µH
Tolerance	±10%
Current Rating	450 mA
DC Resistance (Max)	400 mOhm
Shielding	Shielded
Core Material	Ferrite
Operating Temperature	-55°C to 105°C
Mounting Type	Through Hole
Package	Axial
Size	0.162" Dia x 0.410" L (4.11mm x 10.41mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: inductance value (3.9 µH), tolerance (±10%), current rating (450 mA), DC resistance (400 mOhm max), shielding configuration, mounting type (through hole), and physical dimensions (0.162" Dia x 0.410" L). All listed substitutes maintain these core electrical and mechanical specifications. Variations in core material (ferrite vs. iron), construction type (drum core vs. molded), operating temperature range, packaging format, and compliance status are noted but do not disqualify substitution when the primary electrical parameters align.

Parameter Comparison

Parameter	9250-392-RC (Main)	9250A-392-RC	ER1641-392KM	ER1641-392KP	ER1641-392KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	3.9 µH	3.9 µH	3.9 µH	3.9 µH	3.9 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating	450 mA	450 mA	450 mA	450 mA	450 mA
DC Resistance (Max)	400 mOhm	400 mOhm	400 mOhm	400 mOhm	400 mOhm
Q @ Freq	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz
Frequency - Self Resonant	75 MHz	75 MHz	75 MHz	75 MHz	75 MHz
Shielding	Shielded	Shielded	Shielded	Shielded	Unshielded
Core Material	Ferrite	Ferrite	Iron	Iron	Iron
Type	Drum Core, Wirewound	Molded	Molded	Molded	-
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 (4.11mm 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 Format	-	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

The 9250A-392-RC from Bourns Inc. is the primary direct substitute for the obsolete 9250-392-RC. Both parts maintain identical electrical specifications and physical dimensions. The 9250A-392-RC offers extended operating temperature range (-55°C to 125°C vs. -55°C to 105°C), active product status, and ROHS3 compliance, making it suitable for applications requiring regulatory adherence.

The ER1641 series from API Delevan Inc. (ER1641-392KM and ER1641-392KP) provides functional equivalence with shielded molded construction and active availability. These parts are suitable for applications where core material composition (iron vs. ferrite) does not impose design constraints. However, these variants are RoHS non-compliant and should be evaluated against compliance requirements.

The ER1641-392KR variant is unshielded and should be selected only when shielding is not a circuit requirement, as the main part and primary substitutes are specified as shielded.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-392-RC directly replace the 9250-392-RC in existing designs?

A: Yes. The 9250A-392-RC maintains all critical electrical parameters (3.9 µH inductance, 450 mA current rating, 400 mOhm DC resistance) and physical dimensions. The extended operating temperature range and active product status make it a direct replacement.

Q: What is the difference between the Bourns and API Delevan substitutes?

A: The Bourns 9250A-392-RC uses ferrite core material and is ROHS3 compliant. The API Delevan ER1641 series uses iron core material and is RoHS non-compliant. All maintain equivalent electrical performance at the specified test frequency (7.9 MHz).

Q: Can I use the ER1641-392KR (unshielded) in place of the shielded main part?

A: Only if circuit design does not require shielding. The unshielded variant will exhibit different electromagnetic coupling characteristics. Shielding requirements must be evaluated against application specifications.

Q: What packaging formats are available?

A: The 9250A-392-RC is supplied in bulk packaging. The ER1641 series (ER1641-392KM, ER1641-392KP, ER1641-392KR) are supplied in Tape & Reel format. Packaging selection depends on production volume and assembly process requirements.

Q: Are there compliance considerations for substitute selection?

A: The 9250A-392-RC is ROHS3 compliant. The ER1641 series variants are RoHS non-compliant. Applications subject to RoHS regulations must use the 9250A-392-RC or equivalent compliant alternatives.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message