Equivalent & Substitute Parts for 9250A-276-RC

Part Overview

The 9250A-276-RC is a 27 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 308 Ohm and operates across a temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

9250A-276-RC

Bourns Inc.In Stock: 10059250A-276-RC Datasheet

Current PartRFQ

4307R-276K

API Delevan Inc.In Stock: 11144307R-276K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9250A-276-RC is determined by the following critical parameters:

• Inductance Value: 27 mH (must match exactly within ±10% tolerance)
• DC Resistance: 308 Ohm maximum (must not exceed specified value)
• Current Rating: Minimum 16 mA (substitute must support or exceed this requirement)
• Shielding: Shielded configuration (electromagnetic containment requirement)
• Core Material: Ferrite (electrical performance characteristic)
• Mounting Configuration: Through-hole axial package (mechanical and assembly compatibility)
• Operating Temperature Range: -55°C to 125°C (environmental specification)

The 4307R-276K from API Delevan Inc. satisfies all substitution criteria. This part maintains identical inductance, tolerance, DC resistance, shielding, core material, mounting type, and operating temperature specifications. The substitute provides an enhanced current rating of 31 mA, exceeding the original 16 mA requirement, and demonstrates improved self-resonant frequency performance at 400 kHz compared to the original 210 kHz specification.

Parameter Comparison

Engineering Selection Recommendations

The 4307R-276K is a direct functional substitute for the obsolete 9250A-276-RC. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The substitute part is classified as active product status, providing long-term availability and supply chain stability compared to the obsolete original component.

The 4307R-276K demonstrates superior electrical performance characteristics, including a higher current rating (31 mA versus 16 mA) and improved self-resonant frequency (400 kHz versus 210 kHz). These enhancements do not compromise compatibility; they extend the operational margin of the component within the circuit application. All critical electrical parameters—inductance, DC resistance, Q factor, and operating temperature range—remain identical to the original specification.

Physical dimensions differ slightly between the two parts. The 4307R-276K measures 0.197" diameter by 0.447" length (5.00 mm × 11.35 mm) compared to the 9250A-276-RC at 0.162" diameter by 0.410" length (4.11 mm × 10.41 mm). PCB layout and mechanical clearance must be evaluated to confirm accommodation of the substitute component's larger envelope.

Frequently Asked Questions (FAQ)

Q: Can the 4307R-276K replace the 9250A-276-RC in existing designs?

A: Yes. The 4307R-276K satisfies all electrical substitution criteria: identical inductance (27 mH), tolerance (±10%), DC resistance (308 Ohm max), shielding configuration, core material, operating temperature range, and mounting type. Physical dimensions require verification for PCB layout compatibility.

Q: What is the significance of the higher current rating in the substitute part?

A: The 4307R-276K provides a 31 mA current rating compared to the original 16 mA specification. This represents an increased operational margin and does not introduce incompatibility. The component remains suitable for circuits designed around the original 16 mA requirement.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both components maintain identical ROHS3 compliance, REACH unaffected status, EAR99 export classification, and HTSUS tariff code (8504.50.8000).

Q: How do the physical dimensions affect substitution?

A: The 4307R-276K is slightly larger (0.197" × 0.447" versus 0.162" × 0.410"). PCB layout, component spacing, and mechanical clearance must be evaluated to confirm the substitute fits within the available footprint and does not create assembly or thermal management issues.

Q: What is the difference in self-resonant frequency between these parts?

A: The 4307R-276K exhibits a self-resonant frequency of 400 kHz compared to 210 kHz for the original part. This higher frequency characteristic may improve performance in high-frequency applications and reduces the risk of resonance-related issues at lower operating frequencies.

Q: Is the substitute part currently available?

A: Yes. The 4307R-276K is classified as active product status with 1,059 pieces in stock, ensuring reliable supply chain availability compared to the obsolete 9250A-276-RC.