Bourns 9250-102 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-102 is a 1 µH shielded drum core wirewound inductor rated for 1.07 A with 70 mOhm maximum DC resistance. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring ferrite core inductance with electromagnetic shielding.

The 9250-102 carries obsolete product status. Equivalent and substitute parts are available from both Bourns and API Delevan Inc. to support ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Inductance	1 µH
Tolerance	±10%
Current Rating	1.07 A
DC Resistance (Max)	70 mOhm
Shielding	Shielded
Operating Temperature	-55°C to 105°C
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Frequency - Self Resonant	140 MHz
Q @ 25 MHz	44

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Inductance Value: 1 µH (exact match required)
Tolerance: ±10% (exact match required)
Current Rating: Minimum 1.07 A
DC Resistance: Maximum 70 mOhm
Shielding: Shielded configuration
Mounting Type: Through Hole
Package / Case: Axial
Physical Dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Operating Temperature Range: Minimum -55°C to 105°C

All substitute parts listed meet these core electrical and mechanical parameters. Variations in core material (ferrite vs. iron), construction type (drum core vs. molded), and packaging format (bulk vs. tape & reel) do not affect functional substitution when electrical specifications align.

Parameter Comparison

Part Number	Manufacturer	Inductance	Current Rating (A)	DCR (mOhm Max)	Shielding	Core Material	Type	Operating Temp (°C)	Q @ 25 MHz	Product Status	RoHS Status
9250-102	Bourns Inc.	1 µH	1.07	70	Shielded	Ferrite	Drum Core, Wirewound	-55 to 105	44	Obsolete	RoHS non-compliant
9250A-102-RC	Bourns Inc.	1 µH	1.07	70	Shielded	Ferrite	Molded	-55 to 125	40	Active	ROHS3 Compliant
1641R-102K	API Delevan Inc.	1 µH	1.09	70	Shielded	Iron	Molded	-55 to 105	44	Active	ROHS3 Compliant
ER1641-102KM	API Delevan Inc.	1 µH	1.07	70	Shielded	Iron	Molded	-55 to 105	44	Active	RoHS non-compliant
ER1641-102KP	API Delevan Inc.	1 µH	1.07	70	Shielded	Iron	Molded	-55 to 105	44	Active	RoHS non-compliant
ER1641-102KR	API Delevan Inc.	1 µH	1.07	70	Unshielded	Iron	-	-55 to 105	44	Active	RoHS non-compliant

Engineering Selection Recommendations

Primary Recommendation: Bourns 9250A-102-RC

The 9250A-102-RC is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications (1 µH, 1.07 A, 70 mOhm DCR) with ferrite core construction and shielding. The extended operating temperature range (-55°C to 125°C) provides additional thermal margin. ROHS3 compliance supports modern procurement and regulatory requirements. Molded construction offers improved mechanical robustness compared to the obsolete drum core design.

Secondary Recommendations: API Delevan ER1641 Series (ER1641-102KM, ER1641-102KP)

These parts provide active product status with identical electrical performance. Iron core construction and molded design deliver equivalent functional performance. Both are available in tape & reel packaging for automated assembly. RoHS non-compliance requires evaluation against project requirements.

Alternative: API Delevan 1641R-102K

This part offers active status with marginally higher current rating (1.09 A vs. 1.07 A). Iron core and molded construction are functionally equivalent. Bulk packaging suits manual assembly workflows. RoHS3 compliance aligns with regulatory standards.

Not Recommended: ER1641-102KR

This part features unshielded construction, which does not meet the shielding requirement of the original 9250-102 specification. Electromagnetic shielding is a critical functional parameter for this application category.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-102-RC directly replace the obsolete 9250-102?

A: Yes. The 9250A-102-RC maintains all critical electrical parameters: 1 µH inductance, 1.07 A current rating, 70 mOhm maximum DCR, and shielded axial configuration. Physical dimensions and mounting type are identical. The extended temperature range and ROHS3 compliance provide additional benefits.

Q: What is the difference between ferrite and iron core inductors in these substitutes?

A: Both ferrite (9250A-102-RC) and iron core (1641R-102K, ER1641 series) materials deliver the specified 1 µH inductance, 70 mOhm DCR, and 44 Q factor at 25 MHz. Core material selection does not affect functional substitution when electrical specifications are met.

Q: Why is ER1641-102KR not suitable as a substitute?

A: The ER1641-102KR is unshielded, whereas the original 9250-102 and all recommended substitutes are shielded. Shielding is a specified functional requirement and cannot be omitted without affecting circuit performance.

Q: What packaging formats are available for these substitutes?

A: The 9250A-102-RC is supplied in bulk packaging. API Delevan ER1641 series parts (ER1641-102KM, ER1641-102KP) are available in tape & reel format for automated assembly. The 1641R-102K is supplied in bulk. Packaging selection depends on assembly process requirements.

Q: Are there RoHS compliance considerations for substitute selection?

A: The 9250A-102-RC and 1641R-102K are ROHS3 compliant. The ER1641 series parts (ER1641-102KM, ER1641-102KP, ER1641-102KR) are RoHS non-compliant. Project requirements and regulatory obligations determine which compliance status is necessary.

Q: Do all substitutes operate across the same temperature range?

A: The 9250A-102-RC extends to 125°C maximum. All other substitutes operate to 105°C maximum, matching the original 9250-102 specification. The 9250A-102-RC provides additional thermal margin for high-temperature applications.

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