IM02EB1R8K Equivalent & Substitute Parts

Part Overview

The IM02EB1R8K is a 1.8 µH unshielded molded inductor manufactured by Vishay Dale, designed for through-hole axial mounting applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part delivers 455 mA current rating with 300mOhm maximum DC resistance, suitable for general-purpose filtering and energy storage applications in electronic circuits.

Key Parameters

Parameter	Value
Inductance	1.8 µH
Inductance Tolerance	±10%
Current Rating	455 mA
DC Resistance (DCR)	300mOhm Max
Core Material	Iron
Shielding	Unshielded
Mounting Type	Through Hole
Package Type	Axial
Operating Temperature Range	-55°C ~ 105°C
Q @ Frequency	30 @ 7.9MHz
Self Resonant Frequency	125MHz
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the IM02EB1R8K is determined by strict equivalence across the following critical parameters:

Inductance Value: 1.8 µH with ±10% tolerance
Current Rating: Minimum 455 mA (equal or higher acceptable)
DC Resistance: 300mOhm maximum
Core Material: Iron
Shielding Configuration: Unshielded
Mounting and Package: Through-hole axial configuration
Operating Temperature: -55°C ~ 105°C range
Frequency Characteristics: Q @ 7.9MHz and 125MHz self-resonant frequency

The 1025R-26K from API Delevan Inc. meets all substitution criteria, with matching inductance, tolerance, core material, shielding, mounting type, and thermal specifications. The substitute part provides a higher current rating (480 mA versus 455 mA), which represents an improvement in current-handling capability without altering the electrical performance envelope.

Parameter Comparison

Parameter	IM02EB1R8K (Vishay Dale)	1025R-26K (API Delevan Inc.)	Match Status
Inductance	1.8 µH	1.8 µH	Equivalent
Inductance Tolerance	±10%	±10%	Equivalent
Current Rating (Amps)	455 mA	480 mA	Substitute Higher
DC Resistance (DCR)	300mOhm Max	300mOhm Max	Equivalent
Core Material	Iron	Iron	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Q @ Frequency	30 @ 7.9MHz	30 @ 7.9MHz	Equivalent
Frequency - Self Resonant	125MHz	125MHz	Equivalent
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	Axial	Axial	Equivalent
Size / Dimension	0.095" Dia x 0.250" L (2.41mm x 6.35mm)	0.095" Dia x 0.250" L (2.41mm x 6.35mm)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

The 1025R-26K from API Delevan Inc. is a direct functional equivalent to the obsolete IM02EB1R8K. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The substitute part is currently in active production status, providing supply continuity and long-term availability advantages over the obsolete original.

The 1025R-26K's higher current rating (480 mA) compared to the IM02EB1R8K (455 mA) does not introduce compatibility issues; it represents enhanced performance margin within the same electrical and thermal envelope. All critical parameters—inductance value, tolerance, DC resistance, core material, shielding configuration, frequency characteristics, and operating temperature range—are identical between the two parts.

Frequently Asked Questions (FAQ)

Q: Can the 1025R-26K be used as a direct replacement for the IM02EB1R8K in existing designs?

A: Yes. The 1025R-26K meets all electrical and mechanical specifications of the IM02EB1R8K. Identical inductance (1.8 µH), tolerance (±10%), DC resistance (300mOhm max), core material (iron), shielding (unshielded), and physical dimensions (0.095" Dia x 0.250" L) ensure drop-in compatibility in through-hole axial mounting applications.

Q: What is the significance of the higher current rating on the 1025R-26K?

A: The 1025R-26K provides 480 mA current rating versus the IM02EB1R8K's 455 mA. This represents a 5.5% increase in current-handling capability. For circuits designed to operate at or below 455 mA, this difference provides additional thermal and electrical margin without affecting circuit performance.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the IM02EB1R8K and 1025R-26K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Why is the IM02EB1R8K classified as obsolete?

A: Obsolescence reflects the manufacturer's decision to discontinue production. The 1025R-26K, maintained in active production status by API Delevan Inc., provides equivalent functionality with assured long-term supply availability.

Q: Are the physical dimensions identical between these inductors?

A: Yes. Both components share identical axial package dimensions of 0.095" diameter by 0.250" length (2.41mm x 6.35mm), ensuring mechanical compatibility in PCB layouts and through-hole mounting applications.

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