IM02EB331K Equivalent & Substitute Parts

Part Overview

The IM02EB331K is a 330 µH unshielded molded inductor manufactured by Vishay Dale, rated for 45 mA maximum current with 28 Ohm maximum DC resistance. This through-hole axial component operates across -55°C to 105°C and is compliant with ROHS3 standards. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring 330 µH inductance in axial through-hole configurations.

Key Parameters

Parameter	Value
Inductance	330 µH
Tolerance	±10%
Current Rating	45 mA
DC Resistance (Max)	28 Ohm
Core Material	Ferrite
Shielding	Unshielded
Q @ Frequency	30 @ 790 kHz
Self Resonant Frequency	7 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)

Substitute Part Grouping Explanation

Substitution of the IM02EB331K is based on electrical and mechanical parameter equivalence. All substitute parts maintain identical inductance (330 µH), tolerance (±10%), current rating (45 mA), DC resistance (28 Ohm maximum), core material (ferrite), shielding configuration (unshielded), Q factor (30 @ 790 kHz), self-resonant frequency (7 MHz), operating temperature range (-55°C to 105°C), and physical dimensions (0.095" Dia × 0.250" L). All substitutes are through-hole axial components. Differences exist only in manufacturer (API Delevan Inc.), packaging format, product status, and regulatory compliance certifications.

Parameter Comparison

Parameter	IM02EB331K (Vishay Dale)	1025R-80K (API Delevan)	ER1025-80KM (API Delevan)	ER1025-80KP (API Delevan)	ER1025-80KR (API Delevan)
Inductance	330 µH	330 µH	330 µH	330 µH	330 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	45 mA	45 mA	45 mA	45 mA	45 mA
DC Resistance (Max)	28 Ohm	28 Ohm	28 Ohm	28 Ohm	28 Ohm
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Q @ Frequency	30 @ 790 kHz	30 @ 790 kHz	30 @ 790 kHz	30 @ 790 kHz	30 @ 790 kHz
Self Resonant Frequency	7 MHz	7 MHz	7 MHz	7 MHz	7 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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial
Physical Dimensions	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)	0.095" Dia × 0.250" L (2.41 mm × 6.35 mm)
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	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

1025R-80K (API Delevan Inc.) is the primary direct substitute. This part maintains active product status, ROHS3 compliance matching the original IM02EB331K, and bulk packaging. All electrical and mechanical parameters are identical, making this the preferred choice for applications requiring regulatory compliance continuity.

ER1025-80KM, ER1025-80KP, and ER1025-80KR (API Delevan Inc.) are functionally equivalent alternatives with identical electrical specifications. These parts are supplied in Tape & Reel format and carry active product status. However, all three are RoHS non-compliant. The ER1025-80KR variant is qualified to MIL-PRF-39010/10 military specifications, suitable for applications requiring military-grade inductors. Selection among these three should be based on packaging requirements and regulatory environment.

For applications where ROHS3 compliance is mandatory, use 1025R-80K. For military applications, use ER1025-80KR. For standard commercial applications without specific compliance requirements, any of the four substitutes are electrically and mechanically interchangeable.

Frequently Asked Questions (FAQ)

Q: Can I use ER1025-80KR in place of IM02EB331K in a ROHS3-compliant assembly?

A: No. ER1025-80KR is RoHS non-compliant. For ROHS3-compliant assemblies, use 1025R-80K, which maintains ROHS3 compliance identical to the original IM02EB331K.

Q: What is the difference between 1025R-80K and the ER1025 series?

A: All parts are electrically and mechanically identical. The primary differences are packaging format (1025R-80K is bulk; ER1025 variants are Tape & Reel) and RoHS compliance status (1025R-80K is ROHS3 compliant; ER1025 variants are non-compliant).

Q: Is ER1025-80KR suitable for military applications?

A: Yes. ER1025-80KR is qualified to MIL-PRF-39010/10 military specifications and maintains all required electrical and mechanical parameters for military-grade inductor applications.

Q: Are all substitutes physically identical to IM02EB331K?

A: Yes. All substitute parts share identical physical dimensions (0.095" Dia × 0.250" L), axial through-hole mounting configuration, and footprint compatibility.

Q: Can I mix packaging formats in production?

A: Packaging format selection depends on assembly process requirements. Bulk packaging (1025R-80K) suits manual or small-batch assembly. Tape & Reel format (ER1025 variants) is optimized for automated pick-and-place assembly. Electrical performance is identical regardless of packaging format.

Q: Why is the original IM02EB331K marked obsolete?

A: Obsolescence reflects manufacturer discontinuation. API Delevan Inc. equivalents (1025R-80K and ER1025 series) provide active, ongoing supply with identical electrical and mechanical specifications.

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