Bourns 9250-334 330µH Shielded Drum Core Inductor – Equivalent & Substitute Parts

Part Overview

The Bourns 9250-334 is a 330 µH shielded drum core wirewound inductor rated for 110 mA continuous current with a maximum DC resistance of 6.4 Ohm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring controlled inductance with ferrite core shielding.

The 9250-334 carries an obsolete product status. Equivalent substitute parts are available from both Bourns and API Delevan manufacturers, offering active product lines with identical or enhanced electrical specifications and improved compliance ratings.

Key Parameters

Parameter	Value
Inductance	330 µH
Inductance Tolerance	±10%
Current Rating	110 mA
DC Resistance (DCR)	6.4 Ohm Max
Shielding	Shielded
Core Material	Ferrite
Q Factor @ 790 kHz	55
Self-Resonant Frequency	6.5 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package / Case	Axial
Physical Dimensions	0.162" Dia × 0.410" L (4.11 mm × 10.41 mm)

Substitute Part Grouping Explanation

Substitute parts for the 9250-334 are qualified based on the following electrical and mechanical parameters:

Inductance Value: 330 µH ±10%
Current Rating: 110 mA minimum
DC Resistance: 6.4 Ohm maximum
Core Material: Ferrite shielded
Q Factor @ 790 kHz: 55
Self-Resonant Frequency: 6.5 MHz
Mounting Type: Through Hole Axial
Physical Dimensions: 0.162" Dia × 0.410" L (4.11 mm × 10.41 mm)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in product status, packaging format, and compliance certifications are noted but do not affect functional equivalence within the specified parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Inductance	Current Rating	DCR Max	Q @ 790 kHz	SRF	Operating Temp	Product Status	Packaging
9250-334	Bourns Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 105°C	Obsolete	Bulk
9250A-334-RC	Bourns Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 125°C	Active	Bulk
ER1641-334KM	API Delevan Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-334KP	API Delevan Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-334KR	API Delevan Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 105°C	Active	Tape & Reel
ER1641-334KS	API Delevan Inc.	330 µH ±10%	110 mA	6.4 Ohm	55	6.5 MHz	-55°C to 105°C	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: Bourns 9250A-334-RC

The 9250A-334-RC is the direct successor to the obsolete 9250-334. Both components are manufactured by Bourns Inc. and share identical electrical specifications. The 9250A-334-RC offers an extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) and carries ROHS3 compliance status, making it the preferred choice for new designs and production continuity.

Alternative Options: API Delevan ER1641 Series

The ER1641-334KM, ER1641-334KP, ER1641-334KR, and ER1641-334KS are functionally equivalent alternatives from API Delevan Inc. All four variants maintain identical electrical parameters and operate within the same temperature envelope as the original 9250-334. These parts are supplied in Tape & Reel packaging format, suitable for automated assembly processes. All ER1641 variants carry active product status.

Compliance Considerations

The 9250-334 and all ER1641 variants are RoHS non-compliant. The 9250A-334-RC is ROHS3 compliant and should be prioritized for applications subject to RoHS regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-334-RC directly replace the obsolete 9250-334?

A: Yes. The 9250A-334-RC maintains all electrical specifications of the 9250-334, including inductance value, current rating, DC resistance, Q factor, and self-resonant frequency. The extended operating temperature range and improved compliance status make it a direct functional replacement.

Q: What is the difference between the Bourns 9250A-334-RC and the API Delevan ER1641 series?

A: Both product lines meet identical electrical specifications. The primary differences are manufacturer source and packaging format. The 9250A-334-RC is supplied in bulk packaging, while ER1641 variants are supplied in Tape & Reel format. Selection depends on procurement requirements and assembly process compatibility.

Q: Are all ER1641 variants (KM, KP, KR, KS) electrically interchangeable?

A: Yes. All four ER1641 variants maintain identical electrical and mechanical specifications. The suffix designations reflect internal API Delevan manufacturing or packaging variations that do not affect functional performance.

Q: Does the extended temperature range of the 9250A-334-RC affect compatibility?

A: No. The extended range (-55°C to 125°C) is a superset of the original specification (-55°C to 105°C). Applications designed for the 9250-334 operate within the qualified range of the 9250A-334-RC without modification.

Q: What packaging considerations apply when selecting between bulk and Tape & Reel formats?

A: Bulk packaging (9250A-334-RC) is suitable for manual assembly and low-volume production. Tape & Reel packaging (ER1641 series) is optimized for automated pick-and-place assembly systems. Selection should align with production equipment and assembly methodology.

Q: Are there RoHS compliance implications for substitute selection?

A: Yes. The 9250-334 and ER1641 series are RoHS non-compliant. The 9250A-334-RC is ROHS3 compliant. Applications subject to RoHS directives must use the 9250A-334-RC or equivalent compliant alternatives.

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