9250A-476-RC Equivalent & Substitute Parts

Part Overview

The 9250A-476-RC is a 47 mH shielded molded inductor manufactured by Bourns Inc., designed for through-hole axial mounting applications. This component features a ferrite core with a maximum DC resistance of 473 Ohm and a current rating of 13 mA. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

9250A-476-RC

Bourns Inc.In Stock: 11659250A-476-RC Datasheet

Current PartRFQ

B82144A2476J000

EPCOS - TDK ElectronicsIn Stock: 28688B82144A2476J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9250A-476-RC is evaluated based on the following critical parameters:

• Inductance Value: 47 mH (primary functional requirement)
• Current Rating: Minimum 13 mA to support circuit operation
• DC Resistance: Lower DCR values indicate improved efficiency; the substitute must not exceed application thermal constraints
• Core Material: Ferrite core maintains electromagnetic performance characteristics
• Operating Temperature: -55°C ~ 125°C compatibility ensures reliability across specified conditions
• Mounting and Package: Through-hole axial configuration for mechanical compatibility
• Shielding Consideration: Shielded design reduces electromagnetic interference; unshielded alternatives may be acceptable depending on circuit layout requirements

The B82144A2476J000 from EPCOS - TDK Electronics meets the core functional requirements with equivalent inductance and temperature range, while offering improved current handling and lower DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The B82144A2476J000 is a functionally equivalent substitute for the obsolete 9250A-476-RC based on the following criteria:

Electrical Equivalence: Both components provide 47 mH inductance with ferrite core construction and identical operating temperature ranges (-55°C ~ 125°C). The substitute offers superior current handling (30 mA versus 13 mA) and lower DC resistance (230 Ohm versus 473 Ohm), resulting in reduced power dissipation and improved thermal performance.

Compliance and Certification: Both parts maintain ROHS3 compliance and EAR99 export classification. The substitute is classified as an active product with established supply chain availability (28,625 pcs in stock), eliminating obsolescence risk.

Physical Compatibility: Both components utilize through-hole axial mounting with compatible package dimensions, enabling direct board-level substitution without layout modification.

Design Consideration: The primary difference is shielding configuration. The 9250A-476-RC features shielded construction, while the B82144A2476J000 is unshielded. Circuit layout and electromagnetic environment assessment is required to determine if shielding is functionally necessary for the application.

Frequently Asked Questions (FAQ)

Q: Can the B82144A2476J000 directly replace the 9250A-476-RC without circuit modification?

A: Direct substitution is mechanically and electrically feasible for applications where shielding is not a critical requirement. The substitute provides superior electrical performance with lower DC resistance and higher current rating. If electromagnetic shielding is essential to circuit operation, layout-level mitigation strategies may be necessary.

Q: What is the impact of the lower DC resistance in the substitute part?

A: The B82144A2476J000 exhibits 230 Ohm maximum DCR compared to 473 Ohm in the original part. This represents approximately 51% reduction in series resistance, resulting in lower power dissipation and improved efficiency in the circuit. This is a beneficial characteristic for most applications.

Q: Are there tolerance differences between these parts?

A: Yes. The 9250A-476-RC specifies ±10% inductance tolerance, while the B82144A2476J000 provides ±5% tolerance. The tighter tolerance of the substitute may improve circuit performance in applications sensitive to inductance variation.

Q: What is the significance of the shielding difference?

A: The original part is shielded, reducing radiated electromagnetic interference. The substitute is unshielded. In low-noise or high-frequency applications, shielding may be required. Evaluate circuit layout, adjacent signal traces, and EMI requirements to determine if unshielded construction is acceptable.

Q: Are both parts RoHS compliant?

A: Yes. Both the 9250A-476-RC and B82144A2476J000 are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the current rating difference, and does it matter?

A: The substitute supports 30 mA current rating versus 13 mA for the original part. If circuit current requirements do not exceed 13 mA, both parts are suitable. The higher rating of the substitute provides additional design margin and thermal headroom.