Bourns 9310-18 Equivalent & Substitute Parts

Part Overview

The Bourns 9310-18 is a 1.8 µH unshielded drum core wirewound inductor rated for 525 mA with 650mOhm 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 9310-18 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications.

Substiute Parts

9310-18

Bourns Inc.In Stock: 7749310-18 Datasheet

Current PartRFQ

1537-18K

API Delevan Inc.In Stock: 12711537-18K Datasheet

SimilarRFQ

ER1537-18KM

API Delevan Inc.In Stock: 840ER1537-18KM Datasheet

SimilarRFQ

ER1537-18KP

API Delevan Inc.In Stock: 1111ER1537-18KP Datasheet

SimilarRFQ

ER1537-18KR

API Delevan Inc.In Stock: 750ER1537-18KR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 9310-18 are qualified based on the following electrical and mechanical parameters:

• Inductance Value: 1.8 µH (exact match required)
• Tolerance: ±10% (exact match required)
• Current Rating: Minimum 525 mA (equal or higher acceptable)
• DC Resistance: 650mOhm Max (equal or lower acceptable)
• Q @ Frequency: 33 @ 7.9MHz (exact match required)
• Self Resonant Frequency: 150MHz (exact match required)
• 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)
• Shielding: Unshielded (exact match required)

All substitute parts listed maintain these critical parameters within the allowed specifications for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts—API Delevan 1537-18K, ER1537-18KM, ER1537-18KP, and ER1537-18KR—meet the electrical and mechanical specifications required for direct replacement of the Bourns 9310-18.

Product Status Consideration: The substitute parts are classified as active products, ensuring ongoing availability and supply chain continuity compared to the obsolete 9310-18.

Compliance Status: All parts, including the original Bourns 9310-18 and all substitutes, share identical RoHS non-compliance, REACH unaffected, and ECCN/HTSUS classifications. No compliance advantage exists between the original and substitute parts.

Current Rating Advantage: The API Delevan 1537-18K offers a higher current rating of 590 mA compared to the 525 mA rating of the 9310-18 and other ER1537 variants. This provides additional thermal margin in applications operating near the current limit.

Temperature Range: The API Delevan 1537-18K operates to -55°C ~ 125°C, extending the upper temperature limit by 20°C compared to the 9310-18 and ER1537 variants rated to -55°C ~ 105°C.

Packaging: All substitute parts are supplied in Tape & Reel (TR) format, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan 1537-18K be used as a direct replacement for the Bourns 9310-18?

A: Yes. The 1537-18K meets all critical electrical parameters: 1.8 µH inductance, ±10% tolerance, 650mOhm maximum DCR, 33 Q @ 7.9MHz, and 150MHz self-resonant frequency. Physical dimensions and mounting type are identical. The higher current rating (590 mA vs. 525 mA) and extended temperature range (-55°C ~ 125°C vs. -55°C ~ 105°C) provide additional design margin.

Q: What is the difference between the ER1537-18KM, ER1537-18KP, and ER1537-18KR variants?

A: All three ER1537 variants share identical electrical specifications and physical dimensions. They differ only in packaging designation (M, P, R suffixes) and inventory availability. Selection between these variants depends on procurement requirements and supplier stock levels.

Q: Are there any compliance differences between the original Bourns 9310-18 and the API Delevan substitutes?

A: No. All parts maintain identical RoHS non-compliance status, REACH unaffected classification, EAR99 ECCN designation, and 8504.50.8000 HTSUS code. No compliance advantage exists between the original and substitute parts.

Q: What core material differences exist between the Bourns 9310-18 and API Delevan substitutes?

A: The Bourns 9310-18 uses a ferrite drum core, while all API Delevan substitutes use phenolic core material. Despite this material difference, all parts maintain identical electrical performance at the specified test frequency of 7.9 MHz and across the operating temperature range.

Q: Can the ER1537 molded variants be used interchangeably with the 1537-18K?

A: Yes. The ER1537-18KM, ER1537-18KP, and ER1537-18KR molded inductors are electrically and mechanically equivalent to the 1537-18K. Selection is based on packaging designation requirements and component availability.

Q: What is the impact of the higher current rating on the 1537-18K?

A: The 1537-18K is rated for 590 mA compared to 525 mA for the 9310-18 and ER1537 variants. This 65 mA additional capacity provides thermal margin and reduces the risk of saturation in applications operating near the current limit. The higher rating does not affect performance in applications operating below 525 mA.