Equivalent & Substitute Parts for 9310-52-RC

Part Overview

The Bourns 9310-52-RC is a 33 µH unshielded drum core wirewound inductor rated for 250 mA with a maximum DC resistance of 3 Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making identification of suitable equivalent parts essential for ongoing design support and production continuity. Substitute parts must maintain the specified inductance value, current rating compatibility, and through-hole axial package format while meeting applicable compliance standards.

Substiute Parts

9310-52-RC

Bourns Inc.In Stock: 11529310-52-RC Datasheet

Current PartRFQ

B78108S1333K000

EPCOS - TDK ElectronicsIn Stock: 23749B78108S1333K000 Datasheet

DirectRFQ

1537R-51K

API Delevan Inc.In Stock: 8561537R-51K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Criteria (Must Match):

• Inductance value: 33 µH with ±10% tolerance
• Mounting type: Through hole
• Package format: Axial
• Shielding classification: Unshielded

Secondary Criteria (Application-Dependent):

• Current rating must equal or exceed the design requirement (250 mA minimum)
• DC resistance must not exceed 3 Ohm maximum
• Core material and construction type may vary if electrical performance is maintained
• Operating temperature range should support the application environment

Identified Substitutes:

1. B78108S1333K000 (EPCOS - TDK Electronics): Direct manufacturer equivalent with enhanced current rating (500 mA) and lower DC resistance (920 mOhm). Active product status with ROHS3 compliance.

2. 1537R-51K (API Delevan Inc.): Similar electrical performance with matching DCR (3 Ohm Max) and operating temperature range. Molded construction with iron core instead of ferrite drum core. Active product status with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

B78108S1333K000 Selection Criteria: This part qualifies as a direct manufacturer equivalent. It maintains identical inductance and tolerance specifications while providing superior current handling (500 mA vs. 250 mA) and significantly lower DC resistance (920 mOhm vs. 3 Ohm). The active product status ensures long-term availability and supply chain stability. ROHS3 compliance is confirmed. Physical dimensions are nearly identical (0.157" vs. 0.156" diameter; 0.362" vs. 0.375" length), permitting direct PCB footprint compatibility. The lower self-resonant frequency (9 MHz vs. 19 MHz) should be evaluated for high-frequency applications above 5 MHz.

1537R-51K Selection Criteria: This part qualifies as a similar substitute with matching DC resistance and operating temperature range. The molded iron-core construction differs from the ferrite drum-core design but maintains equivalent electrical performance at the specified test frequency (2.5 MHz). Current rating is reduced to 185 mA, making this option suitable only for applications where the design current does not exceed 185 mA. Physical dimensions and axial package format are identical to the main part. ROHS3 compliance is confirmed. The matching self-resonant frequency (19 MHz) and Q factor (65 @ 2.5 MHz) indicate similar high-frequency behavior to the original part.

Compliance Basis: Both substitutes meet ROHS3 compliance requirements. B78108S1333K000 carries REACH Affected status; 1537R-51K carries REACH Unaffected status. Selection should account for supply chain compliance obligations specific to the end application region.

Frequently Asked Questions (FAQ)

Q: Can B78108S1333K000 be used as a direct replacement for 9310-52-RC? A: Yes. Both parts share identical inductance (33 µH), tolerance (±10%), and axial through-hole package format. B78108S1333K000 provides higher current capacity (500 mA vs. 250 mA) and lower DC resistance (920 mOhm vs. 3 Ohm), making it electrically superior for the same footprint. Physical dimensions are nearly identical and permit direct PCB substitution.

Q: What is the current rating limitation for 1537R-51K? A: The 1537R-51K is rated for 185 mA maximum continuous current, which is below the original 9310-52-RC specification of 250 mA. This substitute is suitable only for applications where the actual operating current does not exceed 185 mA.

Q: How do the core materials differ between these parts? A: The 9310-52-RC and B78108S1333K000 both use ferrite drum-core construction. The 1537R-51K uses an iron-core molded design. Both core types are unshielded and maintain the specified inductance value at 2.5 MHz test frequency. Core material selection affects Q factor, self-resonant frequency, and temperature stability but does not prevent substitution if electrical parameters remain within specification.

Q: Are there operating temperature differences between the substitutes? A: The 9310-52-RC and 1537R-51K both specify -55°C to 105°C operating range. B78108S1333K000 does not provide an explicit operating temperature specification in the available data. Applications requiring confirmed temperature range operation should prioritize 1537R-51K or confirm B78108S1333K000 temperature performance with the manufacturer.

Q: What is the significance of the self-resonant frequency difference? A: The 9310-52-RC and 1537R-51K both exhibit 19 MHz self-resonant frequency, while B78108S1333K000 is rated at 9 MHz. For applications operating below 5 MHz, this difference is not critical. For circuits operating between 5 MHz and 9 MHz, B78108S1333K000 may exhibit reduced inductance due to proximity to resonance. High-frequency applications should evaluate frequency response characteristics.

Q: Do packaging format differences affect PCB assembly? A: All three parts use axial through-hole packages with nearly identical physical dimensions (approximately 0.156" to 0.157" diameter and 0.362" to 0.375" length). PCB footprints designed for the 9310-52-RC will accommodate both substitutes without modification. Packaging format (Cut Tape for B78108S1333K000; Tape & Reel for 1537R-51K) affects procurement and assembly handling but not electrical performance or board-level compatibility.