Bourns 9250-106 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-106 is a 10 mH shielded drum core wirewound inductor rated for 24 mA maximum current with 137 Ohm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -55°C to 105°C and is designed for through-hole axial mounting applications.

Key Parameters

Parameter	Value
Inductance	10 mH
Tolerance	±10%
Current Rating	24 mA
DC Resistance (DCR)	137 Ohm Max
Shielding	Shielded
Core Type	Ferrite
Operating Temperature	-55°C to 105°C
Mounting Type	Through Hole Axial
Q @ 250 kHz	40
Self Resonant Frequency	470 kHz

Substitute Part Grouping Explanation

Substitute parts for the Bourns 9250-106 are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

Inductance value: 10 mH (exact match required)
Inductance tolerance: ±10%
DC resistance: 137 Ohm maximum
Shielding: Shielded configuration
Mounting type: Through hole axial
Frequency test point: 250 kHz

Secondary Compatibility Factors:

Current rating must meet or exceed 24 mA minimum
Operating temperature range must encompass -55°C to 105°C or provide equivalent coverage
Package/case type: Axial through-hole form factor

The substitute parts listed below satisfy these core electrical specifications while offering variations in construction type, current handling capacity, and product status.

Parameter Comparison

Parameter	Bourns 9250-106	API Delevan 4307-106K	TE Connectivity MSC60103KT
Manufacturer	Bourns Inc.	API Delevan Inc.	TE Connectivity Passive Product
Product Status	Obsolete	Active	Active
Inductance	10 mH	10 mH	10 mH
Tolerance	±10%	±10%	±10%
Current Rating (Amps)	24 mA	49 mA	24 mA
Current - Saturation (Isat)	14 mA	14 mA	Not specified
DC Resistance (DCR)	137 Ohm Max	137 Ohm Max	137 Ohm Max
Shielding	Shielded	Shielded	Shielded
Core Type	Ferrite Drum Core	Ferrite Molded	Ferrite Wirewound
Q @ 250 kHz	40	50	40
Self Resonant Frequency	470 kHz	1 MHz	470 kHz
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 105°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.197" Dia x 0.447" L (5.00mm x 11.35mm)	0.165" Dia x 0.394" L (4.20mm x 10.00mm)
RoHS Status	RoHS non-compliant	RoHS non-compliant	RoHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

API Delevan 4307-106K is suitable for applications where increased current handling capacity is beneficial. This part maintains identical inductance, tolerance, and DC resistance specifications while offering 49 mA current rating versus the original 24 mA. The higher self-resonant frequency (1 MHz versus 470 kHz) and extended operating temperature range (-55°C to 125°C) provide additional design margin. The molded construction differs from the original drum core design. This part remains non-compliant with RoHS standards.

TE Connectivity MSC60103KT provides the closest electrical and thermal match to the original Bourns 9250-106. Current rating, Q factor, and self-resonant frequency are identical. Operating temperature range matches the original specification. This part achieves RoHS3 compliance and includes MSL 1 moisture sensitivity rating, supporting modern manufacturing and environmental requirements. Physical dimensions are comparable to the original. Tape & Reel packaging supports automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 4307-106K be used as a direct replacement for the Bourns 9250-106?

A: The 4307-106K meets all core electrical specifications: 10 mH inductance, ±10% tolerance, 137 Ohm maximum DC resistance, and shielded ferrite construction. The higher current rating (49 mA versus 24 mA) and molded construction type represent design differences. Physical dimensions are slightly larger (0.197" diameter versus 0.162"). Compatibility depends on circuit board layout constraints and application current requirements.

Q: What is the primary advantage of the TE Connectivity MSC60103KT?

A: The MSC60103KT provides RoHS3 compliance, addressing regulatory requirements for new designs and manufacturing environments. Electrical specifications match the original part exactly, including current rating, Q factor, and self-resonant frequency. The wirewound construction matches the original design approach. Physical dimensions are nearly identical to the Bourns 9250-106.

Q: Are there physical size constraints when substituting these parts?

A: Yes. The API Delevan 4307-106K has a larger diameter (0.197" versus 0.162") and length (0.447" versus 0.410"), requiring verification of circuit board layout clearances. The TE Connectivity MSC60103KT dimensions are comparable to the original (0.165" diameter, 0.394" length) and present minimal layout impact.

Q: Do all substitute parts support the same operating temperature range?

A: The Bourns 9250-106 and TE Connectivity MSC60103KT both operate from -55°C to 105°C. The API Delevan 4307-106K extends the upper limit to 125°C, providing additional thermal margin for high-temperature applications.

Q: What packaging formats are available?

A: The original Bourns 9250-106 is supplied in bulk packaging. Both substitute parts (API Delevan 4307-106K and TE Connectivity MSC60103KT) are available in Tape & Reel format, supporting automated assembly and component handling.

Q: How do the Q factor values compare?

A: At 250 kHz test frequency, the Bourns 9250-106 and TE Connectivity MSC60103KT both measure Q = 40. The API Delevan 4307-106K achieves Q = 50 at the same frequency, indicating slightly lower losses in the molded construction.

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