Bourns 9250-475 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-475 is a 4.7 mH shielded drum core wirewound inductor rated for 31 mA maximum current with 81.6 Ohm DC resistance. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance filtering and signal conditioning. The 9250-475 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support.

Substiute Parts

9250-475

Bourns Inc.In Stock: 7399250-475 Datasheet

Current PartRFQ

9250A-475-RC

Bourns Inc.In Stock: 21849250A-475-RC Datasheet

DirectRFQ

4307-475K

API Delevan Inc.In Stock: 7184307-475K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 9250-475 are identified based on matching the following critical electrical and mechanical parameters: inductance value (4.7 mH), tolerance (±10%), DC resistance (81.6 Ohm Max), shielding (shielded), core material (ferrite), mounting type (through hole), and package style (axial).

The 9250A-475-RC qualifies as a direct substitute, maintaining identical electrical specifications while upgrading the construction from drum core to molded design and improving product status from obsolete to active. The 4307-475K qualifies as a similar substitute with compatible inductance and resistance but differs in current rating (63 mA versus 31 mA) and physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

The 9250A-475-RC is the primary substitute for the obsolete 9250-475. Both parts maintain identical electrical specifications and physical dimensions. The 9250A-475-RC offers improved product status (active versus obsolete), extended operating temperature range (-55°C to 125°C versus -55°C to 105°C), and ROHS3 compliance, making it suitable for new designs and long-term production continuity.

The 4307-475K from API Delevan Inc. serves as an alternative substitute when higher current capacity is required. This part doubles the current rating to 63 mA while maintaining the same inductance, DC resistance, and shielding characteristics. However, the 4307-475K has larger physical dimensions (0.197" Dia x 0.447" L versus 0.162" Dia x 0.410" L), which may require PCB layout verification. The 4307-475K is not ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-475-RC be used as a direct replacement for the 9250-475?

A: Yes. The 9250A-475-RC maintains identical inductance (4.7 mH), tolerance (±10%), current rating (31 mA), DC resistance (81.6 Ohm Max), and physical dimensions. The primary differences are product status (active versus obsolete), construction method (molded versus drum core wirewound), and extended temperature range.

Q: What are the key differences between the 9250A-475-RC and 4307-475K?

A: Both are shielded 4.7 mH ferrite inductors with 81.6 Ohm DC resistance. The 9250A-475-RC is rated for 31 mA and maintains the original 0.162" diameter. The 4307-475K is rated for 63 mA and has a larger 0.197" diameter. The 4307-475K also features a higher self-resonant frequency (1.7 MHz versus 740 kHz).

Q: Are there any compliance differences between these parts?

A: The 9250A-475-RC is ROHS3 compliant, while both the original 9250-475 and the 4307-475K are RoHS non-compliant. All three parts are REACH unaffected and classified as EAR99.

Q: Will the 4307-475K fit in the same PCB footprint as the 9250-475?

A: No. The 4307-475K has larger dimensions (0.197" Dia x 0.447" L) compared to the 9250-475 (0.162" Dia x 0.410" L). PCB layout verification is required before substitution.

Q: What is the saturation current for these inductors?

A: All three parts have an identical saturation current (Isat) of 19 mA, which is lower than the rated continuous current for the 9250-475 and 9250A-475-RC (31 mA) and the 4307-475K (63 mA).