Bourns 9250A-686-RC Equivalent & Substitute Parts

Part Overview

The Bourns 9250A-686-RC is a 68 mH shielded molded inductor rated for 12 mA maximum current with 580 Ohm maximum DC resistance. This component is designed for through-hole axial mounting applications requiring ferrite core construction with electromagnetic shielding. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

9250A-686-RC

Bourns Inc.In Stock: 10199250A-686-RC Datasheet

Current PartRFQ

B82144A2686J000

EPCOS - TDK ElectronicsIn Stock: 1107B82144A2686J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 9250A-686-RC is evaluated based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 68 mH (core functional requirement)
• Inductance tolerance: ±10% maximum acceptable deviation
• Core material: Ferrite
• Mounting type: Through hole axial
• Operating temperature range: -55°C ~ 125°C minimum

Secondary Compatibility Factors:

• Current rating: Must equal or exceed 12 mA
• DC resistance: Lower values preferred for reduced losses
• Shielding: Shielded construction preferred for EMI-sensitive applications
• RoHS compliance: ROHS3 Compliant status required

The EPCOS B82144A2686J000 meets the primary inductance, core material, mounting, and temperature requirements. However, differences in shielding, current rating, and DC resistance characteristics must be evaluated against specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

The EPCOS B82144A2686J000 is an active product with ROHS3 compliance, providing long-term availability and regulatory alignment. This substitute demonstrates superior electrical performance in DC resistance (290 Ohm vs. 580 Ohm) and current rating capacity (25 mA vs. 12 mA), reducing thermal losses and providing operational margin.

The primary trade-off is the absence of shielding in the EPCOS component. Applications requiring electromagnetic shielding for noise immunity or EMI suppression must evaluate whether unshielded construction is acceptable within the circuit design. The larger physical dimensions (0.205" Dia x 0.472" L versus 0.162" Dia x 0.410" L) require verification of PCB layout compatibility.

Both components maintain identical inductance values, ferrite core construction, through-hole axial mounting, and -55°C to 125°C operating temperature range. The EPCOS part's tighter inductance tolerance (±5% vs. ±10%) provides improved consistency for precision applications.

Frequently Asked Questions (FAQ)

Q: Can the EPCOS B82144A2686J000 directly replace the Bourns 9250A-686-RC?

A: Direct replacement is possible for applications where shielding is not a critical requirement. Both components share identical 68 mH inductance, ferrite core material, through-hole axial mounting, and operating temperature range. Physical dimensions differ, requiring PCB layout verification. The EPCOS part offers improved DC resistance and current rating capacity.

Q: What is the impact of the unshielded design in the EPCOS substitute?

A: Unshielded construction increases susceptibility to external magnetic field interference and may generate greater radiated EMI. Applications in noise-sensitive circuits or those requiring isolation from external magnetic sources should evaluate whether shielding is functionally necessary. Circuit-level filtering or component placement strategies may mitigate unshielded performance.

Q: Are there physical compatibility concerns?

A: Yes. The EPCOS component is larger (0.205" Dia x 0.472" L) compared to the Bourns part (0.162" Dia x 0.410" L). PCB footprint spacing, lead hole diameter, and component clearance must be verified before substitution. Axial lead spacing and solder pad positioning should be confirmed for the specific PCB design.

Q: How do the electrical performance differences affect circuit operation?

A: The EPCOS substitute provides 50% lower DC resistance (290 Ohm vs. 580 Ohm), reducing I²R losses and heat generation. Higher current rating (25 mA vs. 12 mA) provides operational headroom. Tighter inductance tolerance (±5% vs. ±10%) improves consistency. Higher Q factor (40 vs. 23) indicates lower losses at the test frequency. These characteristics generally improve circuit efficiency and reliability.

Q: What compliance certifications apply to both components?

A: Both the Bourns 9250A-686-RC and EPCOS B82144A2686J000 are ROHS3 compliant. The EPCOS component is REACH Affected, while the Bourns part is REACH Unaffected. Both carry EAR99 ECCN classification and 8504.50.8000 HTSUS code. Regulatory requirements for the target application should be confirmed.

Q: Is the EPCOS part suitable for high-frequency applications?

A: The EPCOS B82144A2686J000 has a self-resonant frequency of 150 kHz compared to 130 kHz for the Bourns part. This provides slightly extended usable frequency range. However, both components are designed for low-frequency filtering and energy storage applications. High-frequency performance should be validated through circuit simulation or testing for the specific application frequency.