IMC1812EB4R7J Equivalent & Substitute Parts

Part Overview

The IMC1812EB4R7J is a 4.7 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 315 mA with a maximum DC resistance of 1 Ohm. This surface mount component in 1812 (4532 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are met within the allowed parameter tolerances for this inductor category.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Tolerance	±5%
Current Rating	315 mA
DC Resistance (Max)	1 Ohm
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Shielding	Unshielded
Q @ Frequency	50 @ 7.96 MHz
Self Resonant Frequency	35 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the IMC1812EB4R7J are qualified based on the following electrical and mechanical parameters:

Inductance Value: 4.7 µH with ±5% tolerance
Current Rating: 315 mA minimum
DC Resistance: 1 Ohm maximum
Package / Case: 1812 (4532 Metric) surface mount
Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm), Height 0.134" (3.40mm) maximum
Frequency Characteristics: Q @ 7.96 MHz and Self Resonant Frequency at 35 MHz
Compliance: ROHS3 compliant, MSL 1, REACH unaffected

The substitute parts CM453232-4R7JL and PM1812-4R7J-RC meet all critical electrical specifications and physical constraints. Variations in core material (ferrite vs. iron powder) and operating temperature ranges are noted but do not affect functional substitution within the specified parameter envelope.

Parameter Comparison

Parameter	IMC1812EB4R7J (Vishay Dale)	CM453232-4R7JL (Bourns Inc.)	PM1812-4R7J-RC (Bourns Inc.)
Inductance	4.7 µH	4.7 µH	4.7 µH
Tolerance	±5%	±5%	±5%
Current Rating (Amps)	315 mA	315 mA	315 mA
DC Resistance (Max)	1 Ohm	1 Ohm	1 Ohm
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)
Q @ Frequency	50 @ 7.96 MHz	50 @ 7.96 MHz	50 @ 7.96 MHz
Frequency - Self Resonant	35 MHz	35 MHz	35 MHz
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Shielding	Unshielded	Unshielded	Unshielded
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both substitute parts CM453232-4R7JL and PM1812-4R7J-RC are active production components with ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the primary part IMC1812EB4R7J.

CM453232-4R7JL maintains the full operating temperature range of -40°C ~ 125°C and is available in Tape & Reel packaging with 4018 units in stock.

PM1812-4R7J-RC operates within -40°C ~ 100°C and is also available in Tape & Reel packaging with 3744 units in stock. This part has a reduced upper temperature limit of 100°C compared to the primary part's 125°C maximum.

Selection between substitutes should account for application-specific temperature requirements. The IMC1812EB4R7J primary part supports operation to 125°C; applications requiring this full range should prioritize CM453232-4R7JL or confirm PM1812-4R7J-RC compatibility at the 100°C upper limit.

Frequently Asked Questions (FAQ)

Q: Can CM453232-4R7JL and PM1812-4R7J-RC be used interchangeably with IMC1812EB4R7J?

A: Both substitute parts meet the core electrical specifications: 4.7 µH inductance at ±5% tolerance, 315 mA current rating, and 1 Ohm maximum DC resistance. Physical dimensions and package type (1812 surface mount) are identical. Substitution is valid within the specified parameter envelope. Temperature range differences must be evaluated for specific applications.

Q: What is the difference between the core materials?

A: The IMC1812EB4R7J uses iron powder core material, while both substitute parts use ferrite core material. Both materials achieve the specified electrical characteristics (inductance, Q factor, self-resonant frequency) within the defined tolerances for this component category.

Q: Are there packaging differences between the parts?

A: The primary part IMC1812EB4R7J is supplied in Bulk packaging. Both substitute parts CM453232-4R7JL and PM1812-4R7J-RC are supplied in Tape & Reel (TR) packaging. Tape & Reel format is standard for automated assembly processes and is compatible with standard pick-and-place equipment.

Q: What is the operating temperature consideration for PM1812-4R7J-RC?

A: PM1812-4R7J-RC has a maximum operating temperature of 100°C, compared to 125°C for the primary part and 125°C for CM453232-4R7JL. Applications requiring sustained operation above 100°C should use CM453232-4R7JL or the primary part IMC1812EB4R7J.

Q: Are all parts ROHS3 compliant?

A: Yes. IMC1812EB4R7J, CM453232-4R7JL, and PM1812-4R7J-RC are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH unaffected status.

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