Bourns 9250-685 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-685 is a 6.8 mH shielded drum core wirewound inductor rated for 27 mA maximum current with 111 Ohm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 105°C and is designed for through-hole axial mounting applications.

Substiute Parts

9250-685

Bourns Inc.In Stock: 8549250-685 Datasheet

Current PartRFQ

9250A-685-RC

Bourns Inc.In Stock: 13239250A-685-RC Datasheet

DirectRFQ

4307-685K

API Delevan Inc.In Stock: 9124307-685K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 9250-685 is determined by the following critical parameters: inductance value (6.8 mH), tolerance (±10%), DC resistance (111 Ohm maximum), shielding type (shielded), core material (ferrite), and mounting configuration (through-hole axial). The current rating and saturation current establish the electrical operating envelope for the component.

Two substitute parts are identified:

Direct Substitute (9250A-685-RC): Maintains identical electrical specifications and physical dimensions while upgrading from drum core to molded construction. Product status transitions from obsolete to active, with improved temperature rating and RoHS3 compliance.

Similar Substitute (4307-685K): Maintains core electrical parameters (inductance, tolerance, DCR, shielding) but increases current rating to 54 mA and modifies physical dimensions. This part accommodates higher current applications within the same inductance and resistance envelope.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 9250A-685-RC is the primary substitute for the obsolete 9250-685. Both parts maintain identical electrical specifications and physical dimensions, ensuring drop-in compatibility. The 9250A-685-RC offers active product status, extended temperature rating to 125°C, and RoHS3 compliance, making it suitable for new designs and production continuity.

For Higher Current Applications: The 4307-685K from API Delevan Inc. accommodates applications requiring 54 mA current capacity while maintaining the same inductance, tolerance, and DC resistance. Physical dimensions increase slightly (0.197" diameter vs. 0.162"), requiring PCB layout verification. This part is active and rated to 125°C but does not carry RoHS3 compliance.

Compliance Considerations: Selection between 9250A-685-RC and 4307-685K depends on RoHS compliance requirements. The 9250A-685-RC is RoHS3 compliant; the 4307-685K is RoHS non-compliant. Both parts are REACH unaffected and classified as EAR99.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-685-RC replace the 9250-685 in existing designs? A: Yes. The 9250A-685-RC maintains identical inductance (6.8 mH), tolerance (±10%), current rating (27 mA), DC resistance (111 Ohm max), and physical dimensions (0.162" Dia x 0.410" L). The transition from drum core to molded construction does not affect electrical performance for this specification.

Q: What is the primary difference between the 9250-685 and 9250A-685-RC? A: The 9250-685 uses drum core wirewound construction and is obsolete. The 9250A-685-RC uses molded construction, is active, extends operating temperature to 125°C, and achieves RoHS3 compliance.

Q: When should the 4307-685K be selected instead of the 9250A-685-RC? A: The 4307-685K is selected when circuit requirements exceed 27 mA current capacity. It is rated for 54 mA while maintaining the same inductance and DC resistance. Physical dimensions are larger (0.197" Dia x 0.447" L), requiring PCB layout verification.

Q: Are there packaging differences between these parts? A: The 9250-685 and 9250A-685-RC are supplied in bulk packaging. The 4307-685K is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.

Q: Do all three parts meet the same frequency specifications? A: The 9250-685 and 9250A-685-RC share identical Q factor (40 @ 250 kHz) and self-resonant frequency (660 kHz). The 4307-685K has higher Q (50 @ 250 kHz) and higher self-resonant frequency (1.4 MHz), reflecting its molded construction and higher current rating.