IM02EB330K Equivalent & Substitute Parts

Part Overview

The IM02EB330K is a 33 µH unshielded molded inductor manufactured by Vishay Dale, rated for 130 mA with a maximum DC resistance of 3.4 Ohm. This through-hole axial component operates across a temperature range of -55°C to 105°C and is designed for general-purpose filtering and energy storage applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	33 µH
Tolerance	±10%
Current Rating	130 mA
DC Resistance (Max)	3.4 Ohm
Q @ Frequency	45 @ 2.5 MHz
Self Resonant Frequency	24 MHz
Operating Temperature Range	-55°C to 105°C
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.095" Dia x 0.250" L (2.41mm x 6.35mm)

Substitute Part Grouping Explanation

Substitution for the IM02EB330K is determined by electrical and mechanical parameter matching across the following criteria:

Electrical Parameters (Critical):

Inductance value: 33 µH ±10%
Current rating: 130 mA minimum
DC resistance: 3.4 Ohm maximum
Q factor: 45 @ 2.5 MHz
Self-resonant frequency: 24 MHz
Operating temperature range: -55°C to 105°C

Mechanical Parameters (Critical):

Core material: Ferrite
Shielding configuration: Unshielded
Mounting type: Through hole
Package style: Axial
Physical dimensions: 0.095" Dia x 0.250" L (2.41mm x 6.35mm)

All substitute parts listed below match these parameters exactly, ensuring direct functional equivalence and mechanical interchangeability.

Parameter Comparison

Parameter	IM02EB330K (Vishay Dale)	1025R-56K (Delevan)	ER1025-56KM (API Delevan)	ER1025-56KP (API Delevan)	ER1025-56KR (API Delevan)
Inductance	33 µH	33 µH	33 µH	33 µH	33 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	130 mA	130 mA	130 mA	130 mA	130 mA
DC Resistance (Max)	3.4 Ohm	3.4 Ohm	3.4 Ohm	3.4 Ohm	3.4 Ohm
Q @ 2.5 MHz	45	45	45	45	45
Self Resonant Frequency	24 MHz	24 MHz	24 MHz	24 MHz	24 MHz
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial
Physical Dimensions	0.095" Dia x 0.250" L	0.095" Dia x 0.250" L	0.095" Dia x 0.250" L	0.095" Dia x 0.250" L	0.095" Dia x 0.250" L
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Non-Compliant	RoHS Non-Compliant	RoHS Non-Compliant
Packaging Format	-	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For RoHS3 Compliant Applications: The 1025R-56K (Delevan) is the primary substitute, maintaining ROHS3 compliance identical to the original IM02EB330K. This part is active and available in bulk packaging, suitable for applications requiring regulatory compliance with modern environmental standards.

For Military or High-Reliability Applications: The ER1025-56KR (API Delevan) is qualified to MIL-PRF-39010/10 military specifications and is the appropriate selection for defense, aerospace, or mission-critical applications requiring military-grade component certification.

For Standard Production Applications: The ER1025-56KM and ER1025-56KP (API Delevan) are active alternatives available in tape and reel packaging, optimized for automated assembly processes. These parts are suitable for high-volume manufacturing where RoHS compliance is not a requirement.

All substitute parts are electrically and mechanically equivalent to the IM02EB330K and provide direct pin-for-pin and form-factor compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 1025R-56K directly replace the IM02EB330K in existing designs? A: Yes. The 1025R-56K matches all electrical parameters (33 µH, 130 mA, 3.4 Ohm DCR) and mechanical specifications (axial through-hole, identical dimensions). It is a direct functional equivalent with identical RoHS3 compliance status.

Q: What is the difference between the ER1025 variants (ER1025-56KM, ER1025-56KP, ER1025-56KR)? A: All three ER1025 variants are electrically identical and meet the same electrical specifications. The primary differences are packaging format (all supplied in tape and reel) and qualification level. The ER1025-56KR includes military specification qualification (MIL-PRF-39010/10), while ER1025-56KM and ER1025-56KP are standard commercial variants. None of the ER1025 variants are RoHS3 compliant.

Q: Why is the original IM02EB330K obsolete? A: The IM02EB330K has been discontinued by Vishay Dale. Active substitutes from Delevan and API Delevan provide equivalent performance and are currently in production.

Q: Does packaging format affect electrical performance? A: No. Bulk packaging (1025R-56K) and tape & reel packaging (ER1025 variants) contain identical components. Packaging format affects only handling, storage, and assembly process compatibility, not electrical or mechanical performance.

Q: Are all substitute parts suitable for my application? A: All listed substitutes are electrically and mechanically equivalent. Selection should be based on compliance requirements (RoHS3 vs. non-compliant), packaging needs (bulk vs. tape & reel), and qualification level (commercial vs. military). Verify that your application requirements align with the selected part's compliance and qualification status.

Q: Can I mix substitute parts in the same assembly? A: Yes. All substitute parts meet identical electrical and mechanical specifications and are interchangeable. However, for consistency in production documentation and traceability, it is recommended to standardize on a single part number per design revision.

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