Bourns 9250-331 330nH Shielded Drum Core Inductor – Equivalent & Substitute Parts

Part Overview

The Bourns 9250-331 is a 330 nH shielded drum core wirewound inductor rated for 780 mA with a maximum DC resistance of 130 mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The part operates across a temperature range of -55°C to 105°C and is designed for through-hole axial mounting in high-frequency applications up to 250 MHz self-resonant frequency.

Key Parameters

Parameter	Value
Inductance	330 nH
Tolerance	±10%
Current Rating	780 mA
DC Resistance (Max)	130 mOhm
Shielding	Shielded
Q Factor @ 25 MHz	46
Self-Resonant Frequency	250 MHz
Mounting Type	Through Hole
Package	Axial
Size	0.162" Dia × 0.410" L (4.11mm × 10.41mm)

Substitute Part Grouping Explanation

Substitution for the 9250-331 is based on electrical and mechanical parameter equivalence:

Primary Substitution Criteria:

Inductance value: 330 nH ±10%
Current rating: 780 mA minimum
DC resistance: 130 mOhm maximum
Shielding: Shielded configuration required
Mounting: Through-hole axial package
Physical dimensions: 0.162" Dia × 0.410" L (4.11mm × 10.41mm)
Q factor @ 25 MHz: 46
Self-resonant frequency: 250 MHz

Substitute Categories:

Direct Manufacturer Substitute (Bourns 9250A-331-RC): Active product from the same manufacturer with identical electrical specifications and improved RoHS3 compliance. Extended operating temperature range to 125°C.
Similar Manufacturer Substitutes (API Delevan ER1641 series): Active products with equivalent electrical performance. Core material differs (phenolic vs. ferrite), but electrical parameters remain within specification. Available in multiple packaging options (ER1641-331KM, ER1641-331KP, ER1641-331KR).

Parameter Comparison

Parameter	9250-331 (Main)	9250A-331-RC	ER1641-331KM	ER1641-331KP	ER1641-331KR
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	330 nH	330 nH	330 nH	330 nH	330 nH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (mA)	780	780	780	780	780
DC Resistance (Max)	130 mOhm	130 mOhm	130 mOhm	130 mOhm	130 mOhm
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Q @ 25 MHz	46	46	46	46	46
Self-Resonant Frequency	250 MHz	250 MHz	250 MHz	250 MHz	250 MHz
Operating Temperature	-55°C to 105°C	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	Axial	Axial	Axial	Axial	Axial
Size	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L	0.162" Dia × 0.410" L
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	Non-compliant	Non-compliant
Packaging Option	-	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select Bourns 9250A-331-RC. This part maintains identical electrical specifications to the 9250-331 while offering ROHS3 compliance and an extended operating temperature range to 125°C. As an active product from the original manufacturer, it provides the highest design continuity and supply reliability.

For Non-RoHS Applications or Cost-Optimized Designs: API Delevan ER1641 series (ER1641-331KM, ER1641-331KP, ER1641-331KR) are suitable alternatives. All three variants meet the electrical and mechanical requirements of the 9250-331. Selection among these three should be based on packaging requirements: ER1641-331KM, ER1641-331KP, and ER1641-331KR are all available in Tape & Reel format for automated assembly.

For Legacy System Maintenance: The 9250-331 remains available in inventory (931 pcs). If design re-qualification is not feasible, existing stock may be used for limited production runs.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-331-RC directly replace the 9250-331 in existing designs? A: Yes. The 9250A-331-RC is electrically and mechanically equivalent to the 9250-331. All critical parameters—inductance, current rating, DC resistance, shielding, Q factor, and self-resonant frequency—are identical. The extended operating temperature range (to 125°C) and improved RoHS3 compliance make it a superior choice for new production.

Q: What is the difference between the Bourns 9250A-331-RC and the API Delevan ER1641 series? A: Both meet the electrical specifications of the 9250-331. The primary differences are manufacturer and core material (Bourns uses ferrite; API Delevan uses phenolic). All parts maintain the same inductance, current rating, DC resistance, Q factor, and self-resonant frequency. The choice depends on supply chain preference, compliance requirements, and packaging needs.

Q: Are the ER1641-331KM, ER1641-331KP, and ER1641-331KR interchangeable? A: Yes. All three API Delevan variants are electrically and mechanically identical. They differ only in packaging designation (suffix codes). Selection should be based on your procurement and assembly requirements.

Q: What are the key parameters that determine substitutability? A: Inductance (330 nH ±10%), current rating (780 mA), DC resistance (130 mOhm max), shielding (required), Q factor (46 @ 25 MHz), self-resonant frequency (250 MHz), and physical dimensions (0.162" Dia × 0.410" L) must all match. All listed substitutes meet these criteria.

Q: Does the operating temperature range affect substitutability? A: The 9250A-331-RC has an extended range (-55°C to 125°C) compared to the 9250-331 (-55°C to 105°C). This makes it suitable for applications requiring higher temperature operation. The API Delevan ER1641 series operates within the original -55°C to 105°C range.

Q: What packaging options are available for these substitutes? A: The 9250A-331-RC is available in Bulk packaging. The API Delevan ER1641 series (all three variants) are available in Tape & Reel (TR) format for automated assembly processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message