IM04EB150K Equivalent & Substitute Parts

Part Overview

The IM04EB150K is a 15 µH unshielded molded inductor manufactured by Vishay Dale, rated for 240 mA with a maximum DC resistance of 1.4 Ohm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is currently classified as obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Inductance	15 µH
Tolerance	±10%
Current Rating	240 mA
DC Resistance (Max)	1.4 Ohm
Core Material	Iron
Shielding	Unshielded
Q @ Frequency	65 @ 2.5 MHz
Self Resonant Frequency	40 MHz
Operating Temperature Range	-55°C to 105°C
Mounting Type	Through Hole
Package	Axial
Physical Dimensions	0.156" Dia x 0.375" L (3.96 mm x 9.53 mm)

Substitute Part Grouping Explanation

Substitution eligibility for the IM04EB150K is determined by the following critical parameters: inductance value (15 µH), tolerance (±10%), core material (iron), shielding type (unshielded), DC resistance (1.4 Ohm maximum), operating temperature range (-55°C to 105°C), mounting type (through hole), and package configuration (axial). All substitute parts must match these specifications to ensure functional equivalence in circuit applications.

The identified substitute parts are manufactured by API Delevan Inc. and are available in active product status. These parts maintain identical electrical characteristics and physical dimensions as the original IM04EB150K, with variations only in current rating specifications and regulatory compliance certifications.

Parameter Comparison

Parameter	IM04EB150K	1537R-40K	1537-40K	ER1537-40KM	ER1537-40KP	ER1537-40KR
Manufacturer	Vishay Dale	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.	API Delevan Inc.
Inductance	15 µH	15 µH	15 µH	15 µH	15 µH	15 µH
Tolerance	±10%	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	240 mA	271 mA	271 mA	240 mA	240 mA	240 mA
DC Resistance (Max)	1.4 Ohm	1.4 Ohm	1.4 Ohm	1.4 Ohm	1.4 Ohm	1.4 Ohm
Core Material	Iron	Iron	Iron	Iron	Iron	Iron
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Q @ Frequency	65 @ 2.5 MHz	65 @ 2.5 MHz	65 @ 2.5 MHz	65 @ 2.5 MHz	65 @ 2.5 MHz	65 @ 2.5 MHz
Self Resonant Frequency	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz
Operating Temperature Range	-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	-55°C to 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	Axial	Axial	Axial	Axial	Axial	Axial
Physical Dimensions	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L	0.156" Dia x 0.375" L
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

For applications requiring RoHS3 compliance, the 1537R-40K is the appropriate substitute. This part maintains full electrical equivalence to the IM04EB150K while offering an increased current rating of 271 mA and active product status from API Delevan Inc.

The ER1537-40KM, ER1537-40KP, and ER1537-40KR variants provide exact current rating matching at 240 mA and are available in active product lines. These parts are suitable for applications where RoHS compliance is not a requirement. Selection among these three variants should be based on packaging and distribution channel requirements, as they are electrically identical.

The 1537-40K is available as an alternative but carries RoHS non-compliant status and should be selected only when regulatory requirements do not mandate RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can the 1537R-40K be used as a direct replacement for the IM04EB150K?

A: Yes. The 1537R-40K is electrically equivalent with matching inductance (15 µH), tolerance (±10%), DC resistance (1.4 Ohm), core material (iron), shielding (unshielded), and operating temperature range (-55°C to 105°C). The increased current rating of 271 mA compared to 240 mA provides additional design margin. Physical dimensions and mounting type are identical.

Q: What is the difference between the ER1537 series variants (ER1537-40KM, ER1537-40KP, ER1537-40KR)?

A: These three parts are electrically identical with matching specifications to the IM04EB150K, including 240 mA current rating. The suffix designations (M, P, R) indicate different packaging or distribution configurations. Selection should be based on procurement and assembly requirements.

Q: Does the higher current rating of the 1537R-40K (271 mA vs. 240 mA) affect circuit compatibility?

A: No. A higher current rating indicates the component can safely handle greater current without saturation. This provides additional design margin and does not negatively impact circuits designed for the original 240 mA specification.

Q: Are all substitute parts available in the same axial through-hole package?

A: Yes. All substitute parts maintain the identical 0.156" diameter by 0.375" length axial package configuration, ensuring direct mechanical and electrical compatibility with existing PCB layouts.

Q: Which substitute part should be selected for new designs requiring RoHS compliance?

A: The 1537R-40K is ROHS3 compliant and is the appropriate selection for applications with RoHS regulatory requirements. All other substitute variants carry RoHS non-compliant status.

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