Bourns 9250-335 Equivalent & Substitute Parts

Part Overview

The Bourns 9250-335 is a 3.3 mH shielded drum core wirewound inductor rated for 40 mA with a maximum DC resistance of 53 Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 9250-335 operates across a temperature range of -55°C to 105°C and is RoHS non-compliant.

Substiute Parts

9250-335

Bourns Inc.In Stock: 7669250-335 Datasheet

Current PartRFQ

9250A-335-RC

Bourns Inc.In Stock: 22519250A-335-RC Datasheet

DirectRFQ

4307-335K

API Delevan Inc.In Stock: 9044307-335K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 9250-335 are selected based on the following critical parameters that determine functional equivalence:

• Inductance value: 3.3 mH (exact match required)
• Tolerance: ±10% (exact match required)
• Current Rating: minimum 40 mA (equal or higher acceptable)
• DC Resistance: 53 Ohm Max (equal or lower acceptable)
• Shielding: Shielded (required)
• Core Material: Ferrite (required)
• Mounting Type: Through Hole Axial (required)
• Operating Temperature: minimum -55°C to 105°C (equal or wider range acceptable)

The 9250-335 has two substitute options: the Bourns 9250A-335-RC (direct manufacturer equivalent with improved specifications) and the API Delevan 4307-335K (similar manufacturer alternative with enhanced current rating).

Parameter Comparison

Engineering Selection Recommendations

The Bourns 9250A-335-RC is the primary substitute for the obsolete 9250-335. It maintains identical electrical specifications (3.3 mH inductance, 40 mA current rating, 53 Ohm DCR) and physical dimensions while offering improved product status (Active), extended operating temperature range (-55°C to 125°C), and ROHS3 compliance. The construction type differs from drum core wirewound to molded, but electrical performance remains equivalent.

The API Delevan 4307-335K serves as an alternative substitute with the same inductance, tolerance, and DCR specifications. It provides a higher current rating (80 mA versus 40 mA), extended operating temperature range (-55°C to 125°C), and improved self-resonant frequency (2 MHz versus 840 kHz). However, the physical dimensions are larger (0.197" Dia x 0.447" L versus 0.162" Dia x 0.410" L), which may require PCB layout verification. This part is RoHS non-compliant.

For new designs requiring RoHS compliance and maximum compatibility with the original 9250-335 footprint, the 9250A-335-RC is the recommended choice. For applications where increased current headroom is beneficial and PCB space permits, the 4307-335K offers enhanced performance specifications.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-335-RC be used as a direct replacement for the 9250-335?

A: Yes. The 9250A-335-RC maintains identical inductance (3.3 mH), tolerance (±10%), current rating (40 mA), and DC resistance (53 Ohm Max) specifications. Physical dimensions are identical (0.162" Dia x 0.410" L). The primary difference is construction type (molded versus drum core wirewound) and improved product status (Active versus Obsolete).

Q: What are the physical dimension differences between the 9250-335 and 4307-335K?

A: The 9250-335 measures 0.162" Dia x 0.410" L (4.11 mm x 10.41 mm). The 4307-335K measures 0.197" Dia x 0.447" L (5.00 mm x 11.35 mm). The 4307-335K is larger in both diameter and length. PCB layout verification is required before substitution.

Q: Does the higher current rating of the 4307-335K (80 mA) affect circuit compatibility?

A: No. A higher current rating indicates the component can safely handle greater current without saturation. In circuits designed for 40 mA operation, the 4307-335K will perform identically. The saturation current (Isat) remains 22 mA for both parts.

Q: What is the difference between RoHS compliant and non-compliant status?

A: RoHS compliance indicates the component meets Restriction of Hazardous Substances regulations. The 9250A-335-RC is ROHS3 compliant, while the 9250-335 and 4307-335K are RoHS non-compliant. For applications subject to RoHS requirements, the 9250A-335-RC is the appropriate choice.

Q: Can the 9250-335 be used in applications requiring -55°C to 125°C operation?

A: No. The 9250-335 is rated for -55°C to 105°C operation only. For extended temperature range applications, use the 9250A-335-RC or 4307-335K, both rated to 125°C.

Q: How do the Q factor values compare between substitute parts?

A: The 9250-335 and 9250A-335-RC both have Q = 45 @ 250 kHz. The 4307-335K has Q = 50 @ 250 kHz, indicating slightly higher quality factor at the test frequency.