Equivalent & Substitute Parts for Bourns 9250-684-RC

Part Overview

The Bourns 9250-684-RC is a 680 µH shielded drum core wirewound inductor rated for 80 mA with a maximum DC resistance of 11.8 Ohm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance with ferrite core shielding. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	680 µH
Tolerance	±10%
Current Rating	80 mA
DC Resistance (Max)	11.8 Ohm
Shielding	Shielded
Core Material	Ferrite
Q @ Frequency	60 @ 790 kHz
Self Resonant Frequency	4.5 MHz
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 matching the following critical parameters: inductance value (680 µH), tolerance (±10%), current rating (80 mA), DC resistance (11.8 Ohm max), shielding type (shielded), core material (ferrite), mounting configuration (through hole axial), and physical dimensions (0.162" Dia x 0.410" L). All substitute parts listed meet these electrical and mechanical specifications. Differences in product status, packaging format, and RoHS compliance are noted but do not affect functional equivalence within the specified parameter range.

Parameter Comparison

Parameter	9250-684-RC (Bourns)	9250A-684-RC (Bourns)	ER1641-684KM (API Delevan)	ER1641-684KP (API Delevan)	ER1641-684KR (API Delevan)
Inductance	680 µH	680 µH	680 µH	680 µH	680 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (mA)	80	80	80	80	80
DC Resistance (Max)	11.8 Ohm	11.8 Ohm	11.8 Ohm	11.8 Ohm	11.8 Ohm
Q @ 790 kHz	60	60	60	60	60
Self Resonant Frequency	4.5 MHz	4.5 MHz	4.5 MHz	4.5 MHz	4.5 MHz
Operating Temperature Range	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Core Type	Drum Core, Wirewound	Molded	Molded	Molded	Molded
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Package / Case	Axial	Axial	Axial	Axial	Axial
Size	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 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

The Bourns 9250A-684-RC is the primary direct substitute, offering identical electrical specifications with active product status and ROHS3 compliance. This part extends the operating temperature range to 125°C and transitions from drum core to molded construction while maintaining all critical electrical parameters.

The API Delevan ER1641 series (ER1641-684KM, ER1641-684KP, ER1641-684KR) provides functionally equivalent alternatives with matching inductance, current rating, and DC resistance. These parts are active and available in tape and reel packaging. Selection among the three ER1641 variants depends on packaging requirements and inventory availability. Note that ER1641 series parts are RoHS non-compliant; applications requiring RoHS compliance should prioritize the Bourns 9250A-684-RC.

For applications with extended temperature requirements beyond 105°C, the Bourns 9250A-684-RC supports operation to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-684-RC directly replace the obsolete 9250-684-RC?

A: Yes. Both parts share identical inductance (680 µH), tolerance (±10%), current rating (80 mA), DC resistance (11.8 Ohm max), Q factor (60 @ 790 kHz), self-resonant frequency (4.5 MHz), shielding, core material, and physical dimensions. The primary differences are product status (active vs. obsolete) and operating temperature range extension (-55°C to 125°C vs. -55°C to 105°C).

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

A: All listed parts meet the same electrical specifications. The Bourns 9250A-684-RC is ROHS3 compliant, while the API Delevan ER1641 series is RoHS non-compliant. Packaging differs: Bourns 9250A-684-RC is supplied in bulk, while ER1641 variants are supplied in tape and reel format. Core construction differs (molded vs. drum core in the original), but electrical performance remains equivalent.

Q: Are there packaging considerations when selecting a substitute?

A: Yes. The Bourns 9250A-684-RC is available in bulk packaging, while the API Delevan ER1641 series (ER1641-684KM, ER1641-684KP, ER1641-684KR) is supplied in tape and reel format. Selection should account for assembly line requirements and handling procedures.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance does not affect electrical equivalence. However, applications subject to RoHS regulations must use the Bourns 9250A-684-RC (ROHS3 compliant) rather than the API Delevan ER1641 series (RoHS non-compliant).

Q: Can I use ER1641-684KM, ER1641-684KP, or ER1641-684KR interchangeably?

A: Yes. All three API Delevan variants share identical electrical specifications, core material, shielding, and physical dimensions. Selection among them depends on inventory availability and packaging requirements.

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