Bourns 9230-56 33µH Axial Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 9230-56 is a 33 µH unshielded molded inductor rated for 187 mA with 3.4Ω maximum DC resistance, designed for through-hole axial mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 9230 series represents a legacy product line that requires direct or functionally equivalent alternatives to maintain circuit performance in existing designs.

Substiute Parts

9230-56

Bourns Inc.In Stock: 10919230-56 Datasheet

Current PartRFQ

9230-56-RC

Bourns Inc.In Stock: 21379230-56-RC Datasheet

DirectRFQ

1025-56K

API Delevan Inc.In Stock: 17951025-56K Datasheet

SimilarRFQ

SC30330KT

TE Connectivity Passive ProductIn Stock: 3087SC30330KT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Bourns 9230-56 is determined by strict equivalence across the following critical parameters: inductance value (33 µH), inductance tolerance (±10%), DC resistance (3.4Ω maximum), current rating capability, Q factor at 2.5 MHz, self-resonant frequency, mounting type (through-hole axial), and operating temperature range compatibility.

The substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer): The 9230-56-RC maintains identical electrical specifications and physical dimensions as the main part, with the primary distinction being active product status and RoHS3 compliance. This part is a direct replacement with no design modifications required.

Functional Equivalents (Alternative Manufacturers): The 1025-56K and SC30330KT provide equivalent inductance, tolerance, DC resistance, and frequency characteristics. However, these parts introduce variations in current rating, operating temperature range, shielding configuration, and physical dimensions that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 9230-56-RC is the primary substitute. It maintains identical electrical and mechanical specifications while offering active product status and RoHS3 compliance. No circuit modifications are required. This part is suitable for all applications currently using the 9230-56.

For Alternative Substitution with Design Considerations:

The 1025-56K (API Delevan) is suitable only for applications where the circuit current requirement does not exceed 130 mA. The reduced current rating (130 mA versus 187 mA) limits its use to lower-power designs. The operating temperature range is reduced to -55°C to 105°C, which may be restrictive for high-temperature applications. This part is non-compliant with RoHS3.

The SC30330KT (TE Connectivity) offers the highest current rating (228 mA) and RoHS3 compliance. However, it introduces three critical differences: shielded construction (versus unshielded), larger physical dimensions (0.165" Dia × 0.394" L versus 0.095" Dia × 0.250" L), and a reduced operating temperature range (-55°C to 100°C). The shielded design may alter electromagnetic coupling characteristics in the circuit. The larger footprint may create PCB layout conflicts in space-constrained designs. This part is suitable only when the circuit can accommodate the dimensional and shielding changes.

Frequently Asked Questions (FAQ)

Q: Can the 9230-56-RC be used as a direct drop-in replacement for the 9230-56?

A: Yes. The 9230-56-RC is electrically and mechanically identical to the 9230-56. It requires no circuit modifications and is compatible with existing PCB layouts and designs. The primary advantage is active product status and RoHS3 compliance.

Q: What is the key limitation of the 1025-56K substitute?

A: The 1025-56K has a maximum current rating of 130 mA, compared to 187 mA for the 9230-56. This part is suitable only for circuits operating below 130 mA. Additionally, the operating temperature range is limited to -55°C to 105°C, which may be insufficient for applications requiring the full -55°C to 125°C range of the original part.

Q: Why is the SC30330KT larger than the original part?

A: The SC30330KT has different physical dimensions (0.165" Dia × 0.394" L) compared to the 9230-56 (0.095" Dia × 0.250" L). This size difference reflects the different inductor design and construction method used by TE Connectivity. The larger package may not fit existing PCB layouts designed for the smaller Bourns axial inductor.

Q: Does the shielded construction of the SC30330KT affect circuit performance?

A: Shielding reduces electromagnetic radiation and susceptibility to external interference. In circuits designed for unshielded inductors, the shielded SC30330KT may alter coupling characteristics and frequency response. Verification is required if electromagnetic coupling is critical to circuit function.

Q: Which substitute part is recommended for new designs?

A: The 9230-56-RC is recommended for all applications. It provides direct equivalence, active product status, and RoHS3 compliance. Alternative parts should be considered only when specific design constraints (such as higher current capacity or shielding requirements) necessitate their use, and only after confirming compatibility with the circuit design.

Q: Are there compliance differences between the substitute parts?

A: Yes. The 9230-56-RC and SC30330KT are RoHS3 compliant. The 1025-56K is non-compliant. For applications requiring RoHS3 compliance, only the 9230-56-RC or SC30330KT are suitable. All parts are EAR99 classified and REACH unaffected.