IMC1210SY4R7K Equivalent & Substitute Parts

Part Overview

The IMC1210SY4R7K is a 4.7 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 224 mA maximum current with 1.5 Ohm maximum DC resistance. This surface mount component operates across -55°C to 125°C and is housed in a 1210 (3225 Metric) package. The part is currently active in production with 709 units in stock.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when design specifications allow for equivalent electrical performance with different core materials or shielding configurations.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±10%
Current Rating	224 mA
DC Resistance (Max)	1.5 Ohm
Q @ Frequency	30 @ 7.96 MHz
Frequency - Self Resonant	50 MHz
Operating Temperature Range	-55°C ~ 125°C
Package / Case	1210 (3225 Metric)
Shielding	Unshielded
Core Material	Iron Powder
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the IMC1210SY4R7K is determined by the following critical parameters:

Primary Substitution Criteria:

Inductance value: 4.7 µH (exact match required)
Inductance tolerance: ±10% or tighter
DC resistance: 1.5 Ohm maximum
Q factor: 30 @ 7.96 MHz
Operating temperature range: Must support -55°C to 125°C minimum
Package / Case: 1210 (3225 Metric) or equivalent footprint
Mounting type: Surface mount

Secondary Considerations:

Current rating: Minimum 220 mA acceptable (original rated 224 mA)
Self-resonant frequency: 45 MHz or higher
Core material: Iron powder or ferrite acceptable
Shielding: Unshielded or shielded variants acceptable if electrical parameters match

The substitute parts listed below meet these criteria with variations in core material, shielding configuration, and packaging format.

Parameter Comparison

Parameter	IMC1210SY4R7K (Vishay Dale)	74476404 (Würth Elektronik)	B82422T1472K000 (EPCOS - TDK)	CM322522-4R7JL (Bourns)	CM322522-4R7KL (Bourns)	CMH322522-4R7KL (Bourns)
Inductance	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH
Inductance Tolerance	±10%	±10%	±10%	±5%	±10%	±10%
Current Rating (mA)	224	220	220	165	165	220
DC Resistance (Max)	1.5 Ohm	1.5 Ohm	1.5 Ohm	1.5 Ohm	1.5 Ohm	1.5 Ohm
Q @ 7.96 MHz	30	30	30	30	30	30
Self-Resonant Frequency	50 MHz	45 MHz	50 MHz	55 MHz	55 MHz	45 MHz
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	2-SMD, J-Lead	Nonstandard	Nonstandard	1210 (3225 Metric)
Core Material	Iron Powder	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded	Shielded
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

74476404 (Würth Elektronik WE-GF Series) Direct substitute with ferrite core. Meets all electrical parameters with 220 mA current rating. ROHS3 compliant. Operating temperature range of -40°C to 105°C is narrower than the original; verify acceptability for applications requiring full -55°C operation. Tape & Reel packaging maintains assembly compatibility.

B82422T1472K000 (EPCOS - TDK SIMID Series) Functionally equivalent with ferrite core and AEC-Q200 automotive qualification. Maintains full -55°C to 125°C operating range. Cut Tape packaging differs from original Tape & Reel format; confirm assembly line compatibility. 2-SMD J-Lead package configuration requires footprint verification. ROHS3 compliant. Largest inventory availability (25,439 units).

CM322522-4R7JL (Bourns CM322522 Series) Ferrite core substitute with tighter ±5% inductance tolerance. Current rating of 165 mA is lower than original 224 mA; suitable only for applications with maximum current draw below 165 mA. Nonstandard package designation requires mechanical footprint confirmation. Operating temperature range -40°C to 125°C. ROHS3 compliant.

CM322522-4R7KL (Bourns CM322522 Series) Ferrite core substitute with ±10% inductance tolerance matching the original. Current rating of 165 mA limits applicability to lower-current designs. Nonstandard package requires footprint verification. Operating temperature range -40°C to 125°C. ROHS3 compliant.

CMH322522-4R7KL (Bourns CMH322522 Series) Shielded ferrite core variant with 220 mA current rating. Maintains full -55°C to 125°C operating range. Shielding configuration differs from original unshielded design; use only when electromagnetic isolation is required or when unshielded variants create interference. Standard 1210 (3225 Metric) package. ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower current rating than the original? A: No. The IMC1210SY4R7K is rated for 224 mA. Substitute parts with lower current ratings (such as the Bourns CM322522 variants at 165 mA) are not suitable unless your circuit design operates below the substitute part's maximum current specification. Exceeding the rated current causes inductor saturation and performance degradation.

Q: What is the difference between shielded and unshielded inductors? A: The original IMC1210SY4R7K is unshielded. The CMH322522-4R7KL substitute is shielded. Shielded inductors reduce electromagnetic radiation and susceptibility to external fields. Use the shielded variant only if your application requires EMI suppression or if unshielded operation causes interference with adjacent components.

Q: Why do some substitutes have a narrower operating temperature range? A: The Würth Elektronik 74476404 operates from -40°C to 105°C, compared to the original -55°C to 125°C. This narrower range may be acceptable for consumer or industrial applications but is unsuitable for automotive, aerospace, or extreme-environment applications. Verify your application's temperature requirements before selection.

Q: What does "Nonstandard" package mean for the Bourns CM322522 parts? A: The Bourns CM322522 series uses a nonstandard package designation despite having 1210 (3225 Metric) footprint dimensions. Confirm mechanical compatibility with your PCB layout and assembly equipment before committing to production quantities.

Q: Are all substitute parts RoHS compliant? A: The original IMC1210SY4R7K is RoHS non-compliant. All listed substitutes are ROHS3 compliant. If your application or region requires RoHS compliance, any of the substitute parts satisfy this requirement.

Q: What is the significance of the Q factor specification? A: All listed parts maintain Q = 30 @ 7.96 MHz, indicating equivalent energy storage efficiency at the test frequency. This parameter ensures consistent filtering and impedance characteristics across substitutes.

Q: Can I substitute based on inductance value alone? A: No. Inductance is necessary but not sufficient for substitution. Current rating, DC resistance, operating temperature range, and package compatibility must all match or exceed the original specification. Mismatches in any parameter can cause circuit malfunction or component failure.

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