Bourns 9230-52 22µH Axial Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9230-52 is a 22 µH unshielded molded inductor rated for 190 mA with 3.3Ω maximum DC resistance, designed for through-hole axial mounting. This component operates across -55°C to 125°C and features ferrite core construction. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Inductance	22 µH
Inductance Tolerance	±10%
Current Rating	190 mA
DC Resistance (Max)	3.3Ω
Q Factor @ 2.5MHz	50
Self Resonant Frequency	25 MHz
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole Axial
Shielding	Unshielded
Core Material	Ferrite

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: inductance value (22 µH), inductance tolerance (±10%), DC resistance (3.3Ω maximum), Q factor (50 @ 2.5MHz), self-resonant frequency (25 MHz), mounting type (through-hole axial), and operating temperature compatibility. Current rating variations are acceptable provided the substitute meets or exceeds the minimum 190 mA requirement. Shielding differences and core material variations are noted as design considerations but do not disqualify substitution when all electrical parameters align.

Parameter Comparison

Parameter	Bourns 9230-52	Bourns 9230-52-RC	API Delevan 1025-52K	TE Connectivity SC30220KT
Inductance	22 µH	22 µH	22 µH	22 µH
Inductance Tolerance	±10%	±10%	±10%	±10%
Current Rating (mA)	190	190	144	232
DC Resistance (Max)	3.3Ω	3.3Ω	3.3Ω	3.3Ω
Q @ 2.5MHz	50	50	50	50
Self Resonant Frequency	25 MHz	25 MHz	25 MHz	25 MHz
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-55°C to 105°C	-55°C to 100°C
Mounting Type	Through Hole Axial	Through Hole Axial	Through Hole Axial	Through Hole Axial
Shielding	Unshielded	Unshielded	Unshielded	Shielded
Core Material	Ferrite	Ferrite	Iron	Not Specified
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

Bourns 9230-52-RC is the primary direct substitute. It maintains identical electrical specifications and physical form factor while offering active product status and ROHS3 compliance. This part is recommended for new designs and production continuity where RoHS compliance is required.

API Delevan 1025-52K provides electrical equivalence with identical inductance, tolerance, DC resistance, and Q factor. However, the current rating of 144 mA falls below the original 190 mA specification. This part is suitable only for applications where the actual circuit current does not exceed 144 mA. The iron core construction and military-grade qualification (MIL-PRF-M15305, MS75084) may offer enhanced reliability in specific environments. RoHS non-compliance should be evaluated against project requirements.

TE Connectivity SC30220KT meets all electrical parameters with a higher current rating of 232 mA, providing design margin. The shielded construction differs from the original unshielded design and may affect circuit performance in sensitive applications. Physical dimensions are larger (0.165" diameter × 0.394" length versus 0.095" diameter × 0.250" length), requiring PCB layout verification. ROHS3 compliance is confirmed. This part is suitable for applications where shielding is beneficial or neutral and board space permits the larger footprint.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 9230-52-RC directly replace the obsolete 9230-52?

A: Yes. The 9230-52-RC is electrically and mechanically identical to the 9230-52, with the same inductance, tolerance, current rating, DC resistance, Q factor, and physical dimensions. The primary difference is active product status and ROHS3 compliance.

Q: Is the API Delevan 1025-52K suitable for all applications using the 9230-52?

A: The 1025-52K matches all electrical specifications except current rating. It is suitable only for circuits where the actual operating current does not exceed 144 mA. If the circuit requires the full 190 mA capability, this part is not appropriate.

Q: What are the implications of using the shielded TE Connectivity SC30220KT instead of the unshielded original?

A: Shielding reduces electromagnetic radiation and susceptibility to external interference. In circuits sensitive to EMI, shielding may improve performance. In circuits where shielding is not required, it adds no functional benefit. The larger physical dimensions (0.165" diameter × 0.394" length) must be accommodated in PCB layout.

Q: Are there temperature range limitations with substitute parts?

A: The API Delevan 1025-52K operates to 105°C maximum and the TE Connectivity SC30220KT to 100°C maximum, compared to the original 125°C maximum. For applications requiring operation above 105°C, only the Bourns 9230-52-RC maintains the full -55°C to 125°C range.

Q: What is the significance of core material differences?

A: The original uses ferrite core; the API Delevan uses iron core. Both achieve the specified electrical parameters. Iron core construction may offer different frequency response characteristics and environmental stability. Core material selection should be verified against circuit performance requirements.

Q: Are RoHS compliance differences important for part selection?

A: RoHS compliance is determined by project and regulatory requirements. The Bourns 9230-52-RC and TE Connectivity SC30220KT are ROHS3 compliant. The API Delevan 1025-52K is non-compliant. For projects requiring RoHS compliance, only the compliant parts are acceptable.

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