IMC1812EB4R7K Equivalent & Substitute Parts

Part Overview

The IMC1812EB4R7K is a 4.7 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 315 mA continuous current with a maximum DC resistance of 1 Ohm. This surface mount component in 1812 (4532 Metric) package is actively produced and ROHS3 compliant. Substitute parts are identified for applications requiring equivalent electrical performance, alternative core materials, or specific packaging configurations while maintaining the same functional specifications.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±10%
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
Q @ Frequency	50 @ 7.96 MHz
Shielding	Unshielded
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: inductance value (4.7 µH), inductance tolerance (±10% or tighter), current rating (315 mA minimum), DC resistance (1 Ohm maximum), package type (1812/4532 Metric), surface mount configuration, and unshielded construction. All identified substitutes meet or exceed these electrical and mechanical specifications. Core material differences (iron powder versus ferrite) are permitted provided all electrical parameters remain within specification. Operating temperature range variations are noted but do not preclude substitution where the application temperature envelope is within the substitute part's rated range.

Parameter Comparison

Parameter	IMC1812EB4R7K (Vishay Dale)	3613C4R7K (TE Connectivity)	74476604 (Würth Elektronik)	CM453232-4R7JL (Bourns)	CM453232-4R7KL (Bourns)
Inductance	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH
Inductance Tolerance	±10%	±10%	±10%	±5%	±10%
Current Rating (mA)	315	315	315	315	315
DC Resistance (Max)	1 Ohm	1 Ohm	1 Ohm	1 Ohm	1 Ohm
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)
Core Material	Iron Powder	Ferrite	Ferrite	Ferrite	Ferrite
Core Type	Drum Core, Wirewound	Not specified	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Q @ 7.96 MHz	50	50	50	50	50
Frequency - Self Resonant	35 MHz	35 MHz	95 MHz	35 MHz	35 MHz
Operating Temperature Range	-55°C ~ 125°C	-30°C ~ 100°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance. The IMC1812EB4R7K features the widest operating temperature range (-55°C ~ 125°C) and iron powder core construction. The 3613C4R7K from TE Connectivity operates within a narrower temperature window (-30°C ~ 100°C) and is suitable for applications not requiring the full -55°C lower limit. The 74476604 from Würth Elektronik provides the highest self-resonant frequency (95 MHz) with ferrite core construction and operates from -40°C ~ 105°C. Both Bourns CM453232 variants (CM453232-4R7JL and CM453232-4R7KL) support the full -40°C ~ 125°C temperature range; the CM453232-4R7JL offers tighter inductance tolerance (±5%) while the CM453232-4R7KL matches the ±10% tolerance of the original part. Selection should be based on specific application temperature requirements and core material compatibility with the circuit design.

Frequently Asked Questions (FAQ)

Q: Can I substitute the IMC1812EB4R7K with a ferrite core inductor? A: Yes. The substitute parts 3613C4R7K, 74476604, CM453232-4R7JL, and CM453232-4R7KL all use ferrite cores and meet the electrical specifications. Ferrite core inductors exhibit different frequency characteristics and temperature coefficients compared to iron powder cores; circuit performance should be evaluated for the specific application frequency range.

Q: What is the difference between the two Bourns substitutes (CM453232-4R7JL and CM453232-4R7KL)? A: Both parts are mechanically and electrically identical except for inductance tolerance. The CM453232-4R7JL provides ±5% tolerance, while the CM453232-4R7KL provides ±10% tolerance matching the original IMC1812EB4R7K. Applications requiring tighter inductance control should specify the CM453232-4R7JL variant.

Q: Are all substitutes available in the same packaging format? A: The IMC1812EB4R7K is supplied in Bulk packaging. All substitute parts are available in Tape & Reel (TR) format, which is standard for high-volume production. Tape & Reel packaging is compatible with automated assembly equipment and provides the same component specifications as bulk packaging.

Q: Which substitute has the best high-frequency performance? A: The 74476604 from Würth Elektronik features the highest self-resonant frequency at 95 MHz, compared to 35 MHz for the original part and other substitutes. This characteristic makes it suitable for applications operating at higher frequencies within the 4.7 µH inductance range.

Q: Can I use the 3613C4R7K if my application operates below -30°C? A: No. The 3613C4R7K is rated for -30°C minimum operating temperature. For applications requiring operation below -30°C, use the IMC1812EB4R7K (-55°C minimum), 74476604 (-40°C minimum), or Bourns variants (-40°C minimum).

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