Bourns 9310-20 Fixed Inductor: Equivalent & Substitute Parts

Part Overview

The Bourns 9310-20 is a 2.2 µH unshielded drum core wirewound inductor rated for 435 mA with 950mOhm maximum DC resistance. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors. The 9310-20 is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives from API Delevan Inc. provide functional equivalence while maintaining electrical performance specifications.

Substiute Parts

9310-20

Bourns Inc.In Stock: 12009310-20 Datasheet

Current PartRFQ

1537-20K

API Delevan Inc.In Stock: 11981537-20K Datasheet

SimilarRFQ

ER1537-20KM

API Delevan Inc.In Stock: 662ER1537-20KM Datasheet

SimilarRFQ

ER1537-20KP

API Delevan Inc.In Stock: 746ER1537-20KP Datasheet

SimilarRFQ

ER1537-20KR

API Delevan Inc.In Stock: 903ER1537-20KR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 9310-20 is determined by the following critical parameters:

• Inductance Value: 2.2 µH (exact match required)
• Tolerance: ±10% (exact match required)
• DC Resistance: 950mOhm maximum (exact match required)
• Current Rating: Minimum 435 mA (equal or higher acceptable)
• Operating Temperature Range: Minimum -55°C ~ 105°C (equal or wider range acceptable)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Physical Dimensions: 0.156" Dia x 0.375" L (exact match required)
• Q @ Frequency: 33 @ 7.9MHz (exact match required)
• Self Resonant Frequency: 135MHz (exact match required)

All substitute parts listed meet or exceed these parameters. Core material differences (ferrite vs. phenolic) and construction type variations (drum core vs. molded) do not affect electrical equivalence when all specified parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

All four API Delevan substitute parts (1537-20K, ER1537-20KM, ER1537-20KP, ER1537-20KR) provide electrical equivalence to the obsolete Bourns 9310-20. Selection among these alternatives depends on application-specific requirements:

API Delevan 1537-20K offers the highest current rating at 485 mA and extended operating temperature range to 125°C, suitable for applications requiring thermal margin or higher current headroom.

API Delevan ER1537-20KM and ER1537-20KP maintain identical electrical specifications to the original 9310-20, including 435 mA current rating and -55°C ~ 105°C operating range. These molded inductors are direct functional equivalents.

API Delevan ER1537-20KR is qualified to MIL-PRF-39010/06 military standard with extended operating temperature to 125°C, appropriate for military or high-reliability applications.

All substitute parts share identical inductance, tolerance, DC resistance, Q factor, self-resonant frequency, and physical dimensions. All are available in active production status with tape and reel packaging. RoHS compliance status remains unchanged across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-20K substitute for the Bourns 9310-20 despite the higher current rating?

A: Yes. The 1537-20K meets all electrical specifications of the 9310-20 and exceeds the 435 mA current requirement at 485 mA. Higher current rating does not compromise compatibility; it provides additional design margin.

Q: What is the difference between the ER1537 series variants (ER1537-20KM, ER1537-20KP, ER1537-20KR)?

A: All three ER1537 variants maintain identical electrical parameters. ER1537-20KR includes military qualification to MIL-PRF-39010/06 and operates to 125°C. ER1537-20KM and ER1537-20KP are standard molded inductors with identical -55°C ~ 105°C operating range as the original 9310-20.

Q: Are there any physical compatibility concerns when substituting these parts?

A: No. All substitute parts share identical axial package dimensions of 0.156" Dia x 0.375" L (3.96mm x 9.53mm) and through-hole mounting type. Direct board-level substitution is supported without layout modification.

Q: Does the change from drum core (ferrite) to molded (phenolic) construction affect circuit performance?

A: No. When inductance, tolerance, DC resistance, Q factor, and self-resonant frequency are identical, core material and construction type do not affect electrical performance in the circuit.

Q: What is the inventory status of these substitute parts?

A: API Delevan 1537-20K: 1111 Pcs. ER1537-20KM: 620 Pcs. ER1537-20KP: 659 Pcs. ER1537-20KR: 853 Pcs. All are in active production with tape and reel packaging available.

Q: Are all substitute parts RoHS compliant?

A: No. All listed alternatives, including the original Bourns 9310-20, are RoHS non-compliant. Compliance status is unchanged across all options.