IMC1812EB150K Equivalent & Substitute Parts

Part Overview

The IMC1812EB150K is a 15 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 200 mA with a maximum DC resistance of 2.5Ohm. This surface mount component operates across the temperature range of -55°C to 125°C and is classified as Active product status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this inductor category.

Key Parameters

Parameter	Value	Unit
Inductance	15	µH
Inductance Tolerance	±10%	-
Current Rating	200	mA
DC Resistance (Max)	2.5	Ohm
Core Type	Drum Core, Wirewound	-
Shielding	Unshielded	-
Package / Case	1812 (4532 Metric)	-
Mounting Type	Surface Mount	-
Q @ Frequency	50 @ 2.52MHz	-
Frequency - Self Resonant	17	MHz
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the IMC1812EB150K are qualified based on strict equivalence of the following electrical and mechanical parameters:

Inductance value: 15 µH (within ±10% tolerance)
Current rating: 200 mA minimum
DC resistance: 2.5Ohm maximum
Package / Case: 1812 (4532 Metric) surface mount
Mounting type: Surface Mount
Shielding configuration: Unshielded
Core type: Drum Core, Wirewound
Q factor: 50 @ 2.52MHz
Inductance frequency test: 2.52 MHz

The substitute part 744766115 (Würth Elektronik WE-GF series) meets all critical electrical specifications and maintains mechanical compatibility within the 1812 package footprint. Variations in core material (ferrite vs. iron powder), self-resonant frequency, operating temperature range, and physical height do not disqualify substitution when the primary electrical parameters and package dimensions remain equivalent.

Parameter Comparison

Parameter	IMC1812EB150K (Vishay Dale)	744766115 (Würth Elektronik)	Match Status
Inductance	15 µH	15 µH	Equivalent
Inductance Tolerance	±10%	±10%	Equivalent
Current Rating	200 mA	200 mA	Equivalent
DC Resistance (Max)	2.5 Ohm	2.5 Ohm	Equivalent
Core Type	Drum Core, Wirewound	Drum Core, Wirewound	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Q @ Frequency	50 @ 2.52MHz	50 @ 2.52MHz	Equivalent
Inductance Frequency - Test	2.52 MHz	2.52 MHz	Equivalent
Material - Core	Iron Powder	Ferrite	Different
Frequency - Self Resonant	17 MHz	20 MHz	Different
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	Different
Height - Seated (Max)	0.134" (3.40mm)	0.142" (3.60mm)	Different
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

Both the IMC1812EB150K and 744766115 are Active product status components with full ROHS3 compliance and REACH unaffected status, qualifying them for use in regulated applications. The primary electrical parameters—inductance, current rating, DC resistance, and Q factor—are identical between the two parts, ensuring functional equivalence in circuit operation.

Selection between these parts should account for application-specific requirements:

The IMC1812EB150K (Vishay Dale, iron powder core) operates across -55°C to 125°C and exhibits a self-resonant frequency of 17 MHz.
The 744766115 (Würth Elektronik, ferrite core) operates across -40°C to 105°C and exhibits a self-resonant frequency of 20 MHz.

The 0.008" (0.20mm) difference in seated height is negligible for standard PCB assembly processes. Core material differences (iron powder vs. ferrite) do not affect substitution eligibility when electrical specifications remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can 744766115 directly replace IMC1812EB150K in all applications?

A: Yes, for applications operating within the overlapping temperature range of -40°C to 105°C. Applications requiring operation below -40°C or above 105°C must use the IMC1812EB150K due to its extended temperature rating.

Q: Does the difference in core material (iron powder vs. ferrite) affect circuit performance?

A: Core material differences do not affect substitution when inductance, current rating, DC resistance, and Q factor specifications are identical. The self-resonant frequency differs slightly (17 MHz vs. 20 MHz), which may be relevant only in high-frequency applications near these frequencies.

Q: Are the physical dimensions compatible for PCB assembly?

A: Yes. Both parts use the 1812 (4532 Metric) package with identical length (0.177") and width (0.126"). The seated height difference of 0.008" (0.20mm) is within standard PCB assembly tolerances and does not require design modifications.

Q: What is the packaging difference between these parts?

A: The IMC1812EB150K is supplied in Bulk packaging, while 744766115 is supplied in Tape & Reel (TR) format. This affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8504.50.8000, meeting current regulatory requirements for industrial and commercial applications.

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