Bourns 9310-32 Fixed Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 9310-32 is a 6.8 µH unshielded drum core wirewound inductor rated for 600 mA with a maximum DC resistance of 500mOhm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 9310-32 is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

9310-32

Bourns Inc.In Stock: 9989310-32 Datasheet

Current PartRFQ

1537-32K

API Delevan Inc.In Stock: 7521537-32K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 9310-32 is determined by the following critical parameters:

• Inductance Value: 6.8 µH (with ±10% tolerance)
• DC Resistance: 500mOhm Max
• Current Rating: Minimum 600 mA required for direct replacement
• Q Factor @ 7.9 MHz: 50
• Self Resonant Frequency: 55 MHz
• Operating Temperature Range: -55°C to 105°C
• Package / Case: Axial through-hole
• Physical Dimensions: 0.156" Dia x 0.375" L (3.96mm x 9.53mm)
• Shielding: Unshielded

The API Delevan 1537-32K meets the core electrical specifications (inductance, tolerance, DCR, Q factor, and resonant frequency) and physical dimensions. However, the current rating of 450 mA is lower than the 600 mA specification of the main part. This difference must be evaluated against the actual current requirements of the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan 1537-32K is an active product suitable for substitution where the application current requirement does not exceed 450 mA. Both parts share identical inductance, tolerance, DCR, Q factor, and resonant frequency specifications, ensuring equivalent electrical performance in the frequency range of interest.

The primary consideration is the current rating differential: the 1537-32K is rated for 450 mA versus the 9310-32's 600 mA specification. Applications operating at or below 450 mA continuous current can use the 1537-32K without electrical performance degradation. Applications requiring the full 600 mA rating must source alternative parts or confirm that peak current excursions remain within the 1537-32K's thermal limits.

Both parts are RoHS non-compliant and share identical compliance classifications (ECCN: EAR99, HTSUS: 8504.50.8000). The 1537-32K's active product status provides superior long-term availability compared to the obsolete 9310-32.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-32K directly replace the Bourns 9310-32 in all applications?

A: Direct replacement is possible only if the application circuit operates at or below 450 mA. The 1537-32K has a lower current rating (450 mA vs. 600 mA). If your circuit requires the full 600 mA specification, the 1537-32K is not suitable without circuit redesign or thermal analysis.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.156" diameter by 0.375" length (3.96mm x 9.53mm) in axial configuration, ensuring identical PCB footprint and mounting compatibility.

Q: Do these parts have the same electrical performance at 7.9 MHz?

A: Yes. Both parts have identical Q factor (50) and self-resonant frequency (55 MHz) specifications at the test frequency of 7.9 MHz, ensuring equivalent RF performance in this frequency band.

Q: What is the difference between the drum core wirewound and molded construction?

A: The Bourns 9310-32 uses ferrite drum core wirewound construction, while the API Delevan 1537-32K uses molded iron core construction. Both achieve the same inductance, DCR, and Q specifications. The construction difference does not affect electrical performance for the specified parameters but may influence mechanical robustness and environmental resistance.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts share identical RoHS, REACH, and ECCN classifications. No compliance advantage exists between the two options.

Q: Why is the 1537-32K listed as active while the 9310-32 is obsolete?

A: Product status reflects manufacturer support and availability. The 1537-32K's active status indicates ongoing production and supply chain availability, making it the preferred choice for new designs or ongoing production requirements.