Bourns 9250-103-RC Fixed Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9250-103-RC is a 10 µH shielded drum core wirewound inductor rated for 220 mA with a maximum DC resistance of 1.62Ω. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance with electromagnetic shielding. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	10 µH
Tolerance	±10%
Current Rating	220 mA
DC Resistance (Max)	1.62Ω
Shielding	Shielded
Mounting Type	Through Hole
Package	Axial
Size	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Operating Temperature	-55°C to 105°C
Q @ 7.9 MHz	50
Self Resonant Frequency	46 MHz

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: inductance value (10 µH), tolerance (±10%), current rating (220 mA), DC resistance (1.62Ω max), shielding requirement (shielded), mounting type (through hole), package style (axial), and physical dimensions (0.162" Dia x 0.410" L). All listed substitutes meet these core electrical and mechanical specifications.

The substitute parts are grouped into two categories:

Direct Manufacturer Substitute (Bourns 9250A-103-RC): Active product from the same manufacturer with identical electrical specifications and improved operating temperature range (-55°C to 125°C). Construction differs from the main part (molded vs. drum core) but maintains equivalent performance.

Cross-Manufacturer Substitutes (API Delevan ER1641 series): Active products meeting all electrical parameters with identical physical dimensions. These parts use iron core construction instead of ferrite and are available in both shielded (ER1641-103KM, ER1641-103KP) and unshielded (ER1641-103KR) configurations. Shielding requirement determines selection between shielded and unshielded variants.

Parameter Comparison

Parameter	9250-103-RC (Main)	9250A-103-RC	ER1641-103KM	ER1641-103KP	ER1641-103KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	10 µH	10 µH	10 µH	10 µH	10 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating	220 mA	220 mA	220 mA	220 mA	220 mA
DC Resistance (Max)	1.62Ω	1.62Ω	1.62Ω	1.62Ω	1.62Ω
Shielding	Shielded	Shielded	Shielded	Shielded	Unshielded
Q @ 7.9 MHz	50	50	50	50	50
Self Resonant Frequency	46 MHz	46 MHz	46 MHz	46 MHz	46 MHz
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
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

For RoHS3 Compliant Applications: Select Bourns 9250A-103-RC. This part maintains ROHS3 compliance identical to the original 9250-103-RC while offering active product status and an extended operating temperature range to 125°C. Molded construction provides equivalent electrical performance to the original drum core design.

For Non-RoHS Constrained Applications: API Delevan ER1641 series parts are suitable alternatives. Select ER1641-103KM or ER1641-103KP for shielded applications requiring electromagnetic containment. Select ER1641-103KR only if shielding is not required by circuit design. All ER1641 variants are active products with established supply availability.

For Military or Specification-Driven Applications: ER1641-103KR is qualified to MIL-PRF-39010/02 and suitable for applications with military specification requirements.

Frequently Asked Questions (FAQ)

Q: Can ER1641-103KR (unshielded) replace the shielded 9250-103-RC?

A: No. The original part specifies shielded construction. ER1641-103KR is unshielded and will not provide electromagnetic containment. Use ER1641-103KM or ER1641-103KP for shielded applications.

Q: What is the difference between ER1641-103KM and ER1641-103KP?

A: Both parts are electrically and mechanically identical shielded 10 µH inductors. The difference is packaging: ER1641-103KM is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Does the 9250A-103-RC have better temperature performance than the original?

A: Yes. The 9250A-103-RC operates to 125°C compared to 105°C for the 9250-103-RC. All other electrical specifications remain equivalent.

Q: Are API Delevan ER1641 parts suitable for new designs?

A: Yes. All ER1641 variants are active products. However, RoHS compliance status must be evaluated against application requirements. Bourns 9250A-103-RC is the preferred choice for RoHS3 compliant designs.

Q: Will the different core materials (ferrite vs. iron) affect circuit performance?

A: Core material differences do not affect the specified electrical parameters provided in this reference. All parts deliver 10 µH inductance, 50 Q @ 7.9 MHz, and 46 MHz self-resonant frequency. Circuit validation should confirm performance in the specific application.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes, for through-hole assembly. All parts share identical axial package geometry (0.162" Dia x 0.410" L) and through-hole mounting. No PCB layout modifications are required.

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