IMC1812EB2R7K Equivalent & Substitute Parts

Part Overview

The IMC1812EB2R7K is a 2.7 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 370 mA with a maximum DC resistance of 750mOhm. This surface mount component in 1812 (4532 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when electrical and mechanical parameters align within the allowed tolerances for this inductor category, ensuring functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Specification
Inductance	2.7 µH	Core specification
Current Rating	370 mA	Maximum continuous current
DC Resistance (DCR)	750mOhm Max	Winding resistance
Package / Case	1812 (4532 Metric)	Physical footprint
Mounting Type	Surface Mount	PCB assembly method
Operating Temperature	-55°C ~ 125°C	Thermal range
Shielding	Unshielded	Electromagnetic configuration
RoHS Status	ROHS3 Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitute parts for the IMC1812EB2R7K are qualified based on the following electrical and mechanical criteria:

Inductance Value: 2.7 µH (exact match required)
Current Rating: 370 mA minimum (equal or greater acceptable)
DC Resistance: 750mOhm maximum (equal or lower acceptable)
Package / Case: 1812 (4532 Metric) surface mount (exact match required)
Physical Dimensions: 0.177" L x 0.126" W, Height 0.134" max (exact match required)
Shielding Configuration: Unshielded (exact match required)
Compliance Standards: RoHS3 compliant, MSL 1 rating

The substitute parts CM453232-2R7JL and CM453232-2R7KL from Bourns Inc. meet all critical electrical and mechanical parameters. Both parts are manufactured with ferrite core material (versus iron powder in the original), operate within compatible temperature ranges, and maintain equivalent inductance frequency test specifications at 7.96 MHz.

Parameter Comparison

Parameter	IMC1812EB2R7K (Vishay Dale)	CM453232-2R7JL (Bourns)	CM453232-2R7KL (Bourns)
Inductance	2.7 µH	2.7 µH	2.7 µH
Inductance Tolerance	±10%	±5%	±10%
Current Rating (Amps)	370 mA	370 mA	370 mA
DC Resistance (DCR)	750mOhm Max	750mOhm Max	750mOhm Max
Q @ Freq	50 @ 7.96MHz	50 @ 7.96MHz	50 @ 7.96MHz
Frequency - Self Resonant	50MHz	50MHz	50MHz
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)
Size / Dimension	0.177" L x 0.126" W (4.50mm x 3.20mm)	0.177" L x 0.126" W (4.50mm x 3.20mm)	0.177" L x 0.126" W (4.50mm x 3.20mm)
Height - Seated (Max)	0.134" (3.40mm)	0.134" (3.40mm)	0.134" (3.40mm)
Shielding	Unshielded	Unshielded	Unshielded
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both Bourns substitute parts maintain active product status and full compliance with RoHS3 and REACH regulations. Selection between CM453232-2R7JL and CM453232-2R7KL depends on inductance tolerance requirements:

CM453232-2R7JL: ±5% inductance tolerance provides tighter specification control for applications requiring higher precision.
CM453232-2R7KL: ±10% inductance tolerance matches the original IMC1812EB2R7K specification and is suitable for general-purpose applications.

Both parts operate within the upper temperature range (-40°C to 125°C) of the original specification. Applications requiring the full -55°C lower temperature limit of the IMC1812EB2R7K should confirm thermal performance requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can CM453232-2R7JL and CM453232-2R7KL be used interchangeably with IMC1812EB2R7K?

A: Yes, both Bourns parts are electrically and mechanically equivalent. The primary difference is inductance tolerance: CM453232-2R7JL offers ±5% tolerance versus ±10% for both the original and CM453232-2R7KL. Selection depends on circuit tolerance requirements.

Q: What is the difference between iron powder and ferrite core materials in these inductors?

A: The original IMC1812EB2R7K uses iron powder core material, while the Bourns substitutes use ferrite core material. Both achieve the specified 2.7 µH inductance, 370 mA current rating, and 750mOhm maximum DC resistance. Core material differences do not affect the electrical parameters listed in this specification.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three inductors share identical 1812 (4532 Metric) package dimensions: 0.177" L x 0.126" W with maximum seated height of 0.134". PCB footprints and assembly processes are directly compatible.

Q: What packaging formats are available for the substitute parts?

A: CM453232-2R7JL and CM453232-2R7KL are supplied in Tape & Reel (TR) format. The original IMC1812EB2R7K is available in Bulk packaging. Both formats are suitable for surface mount assembly.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity) rating. ECCN and HTSUS classifications are identical across all parts.

Q: What is the operating temperature range difference?

A: The IMC1812EB2R7K operates from -55°C to 125°C, while both Bourns substitutes operate from -40°C to 125°C. Applications requiring operation below -40°C should retain the original Vishay Dale part.

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