IMS05EB3R3K Equivalent & Substitute Parts

Part Overview

The IMS05EB3R3K is a 3.3 µH shielded molded inductor manufactured by Vishay Dale, rated for 480 mA with a maximum DC resistance of 350 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates across a temperature range of -55°C to 105°C and is suitable for through-hole axial mounting in electronic circuits requiring fixed inductance filtering and energy storage functions.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Tolerance	±10%
Current Rating	480 mA
DC Resistance (DCR)	350 mOhm Max
Shielding	Shielded
Type	Molded
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Operating Temperature	-55°C ~ 105°C
Q @ Freq	44 @ 7.9MHz
Frequency - Self Resonant	85MHz

Substitute Part Grouping Explanation

Substitute parts for the IMS05EB3R3K are qualified based on the following electrical and mechanical parameters:

Inductance value: 3.3 µH ±10%
Current rating: 480 mA minimum
DC resistance: 350 mOhm maximum
Shielding: Shielded configuration
Type: Molded inductor
Mounting: Through-hole axial package
Physical dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Q factor: 44 @ 7.9MHz
Self-resonant frequency: 85MHz

All substitute parts listed meet these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications.

Parameter Comparison

Parameter	IMS05EB3R3K (Vishay Dale)	9250A-332-RC (Bourns Inc.)	ER1641-332KM (API Delevan Inc.)	ER1641-332KP (API Delevan Inc.)	ER1641-332KR (API Delevan Inc.)
Inductance	3.3 µH	3.3 µH	3.3 µH	3.3 µH	3.3 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	480 mA	480 mA	480 mA	480 mA	480 mA
DC Resistance (DCR)	350 mOhm Max	350 mOhm Max	350 mOhm Max	350 mOhm Max	350 mOhm Max
Q @ Freq	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz	44 @ 7.9MHz
Frequency - Self Resonant	85MHz	85MHz	85MHz	85MHz	85MHz
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Type	Molded	Molded	Molded	Molded	Molded
Material - Core	Iron Powder	Ferrite	Iron	Iron	Iron
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

The 9250A-332-RC manufactured by Bourns Inc. is the primary recommended substitute for the obsolete IMS05EB3R3K. This part maintains full electrical and mechanical compatibility while offering an extended operating temperature range of -55°C to 125°C and active product status. The 9250A-332-RC is ROHS3 compliant, meeting current regulatory requirements for new designs and production environments.

The ER1641-332KM, ER1641-332KP, and ER1641-332KR variants from API Delevan Inc. provide functionally equivalent alternatives with identical electrical specifications and physical dimensions. These parts are available in active production status with Tape & Reel packaging. However, these API Delevan options are classified as RoHS non-compliant, making them suitable only for applications where RoHS compliance is not required or for legacy system maintenance where regulatory constraints do not apply.

For new designs and applications requiring regulatory compliance, the 9250A-332-RC is the preferred selection. For existing systems or applications without RoHS requirements, the API Delevan ER1641 series provides cost-effective alternatives with equivalent performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-332-RC directly replace the IMS05EB3R3K in existing circuits?

A: Yes. The 9250A-332-RC meets all electrical specifications (3.3 µH inductance, 480 mA current rating, 350 mOhm DCR) and physical dimensions (0.162" Dia x 0.410" L) of the IMS05EB3R3K. Through-hole axial mounting is identical, allowing direct board-level substitution without circuit redesign.

Q: What is the difference between the Bourns 9250A-332-RC and the API Delevan ER1641 series?

A: All parts share identical electrical performance and physical dimensions. The primary differences are core material composition (Ferrite in 9250A-332-RC versus Iron in ER1641 series), operating temperature range (9250A-332-RC extends to 125°C), and regulatory compliance status (9250A-332-RC is ROHS3 compliant; ER1641 series is RoHS non-compliant).

Q: Are the API Delevan ER1641-332KM, ER1641-332KP, and ER1641-332KR interchangeable?

A: Yes. These three variants are electrically and mechanically identical. The suffix designations (KM, KP, KR) indicate packaging or distribution channel differences, not functional variations. All three meet the same electrical specifications and physical requirements.

Q: What packaging options are available for substitute parts?

A: The 9250A-332-RC is supplied in Bulk packaging. The API Delevan ER1641 series (ER1641-332KM, ER1641-332KP, ER1641-332KR) are supplied in Tape & Reel (TR) packaging. Selection depends on production volume requirements and assembly process compatibility.

Q: Is the extended temperature range of the 9250A-332-RC (-55°C to 125°C) significant for substitution?

A: The extended upper temperature limit of 125°C in the 9250A-332-RC provides additional thermal margin compared to the original IMS05EB3R3K and API Delevan alternatives, both rated to 105°C. This is beneficial for applications operating in elevated ambient conditions or with high component density.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: The 9250A-332-RC is the only ROHS3 compliant option among the listed substitutes. For new designs or applications requiring regulatory compliance with RoHS directives, this part is the mandatory selection.

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