IMC1210EB3R3K Equivalent & Substitute Parts

Part Overview

The IMC1210EB3R3K is a 3.3 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 260 mA continuous current with a maximum DC resistance of 1.2Ohm. This surface mount component operates across the temperature range of -55°C to 125°C and is classified as an active product with ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the 1210 (3225 Metric) package family.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Tolerance	±10%
Current Rating	260 mA
DC Resistance (Max)	1.2Ohm
Q @ Frequency	30 @ 7.96MHz
Self Resonant Frequency	60MHz
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	1210 (3225 Metric)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the IMC1210EB3R3K are qualified based on the following electrical and mechanical criteria:

Inductance value: 3.3 µH (±10% tolerance acceptable)
Current rating: 260 mA minimum
DC resistance: 1.2Ohm maximum
Q factor: 30 @ 7.96MHz
Self resonant frequency: 60MHz or higher
Operating temperature range: -55°C to 125°C minimum coverage
Package compatibility: 1210 (3225 Metric) or equivalent footprint
Surface mount configuration
ROHS3 compliance

Three qualified substitutes meet these criteria with variations in core material, packaging format, and temperature specifications.

Parameter Comparison

Parameter	IMC1210EB3R3K (Vishay Dale)	74476403 (Würth Elektronik)	B82422T1332K000 (EPCOS - TDK)	CM322522-3R3JL (Bourns Inc.)
Inductance	3.3 µH	3.3 µH	3.3 µH	3.3 µH
Tolerance	±10%	±10%	±10%	±5%
Current Rating (Amps)	260 mA	260 mA	260 mA	180 mA
DC Resistance (Max)	1.2Ohm	1.2Ohm	1.2Ohm	1.2Ohm
Q @ 7.96MHz	30	30	30	30
Self Resonant Frequency	60MHz	60MHz	60MHz	65MHz
Operating Temperature Range	-55°C ~ 125°C	-40°C ~ 105°C	-55°C ~ 125°C	-40°C ~ 125°C
Core Material	Iron Powder	Ferrite	Ferrite	Ferrite
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)	2-SMD, J-Lead (1210 equivalent)	Nonstandard (3.20mm x 2.50mm)
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the primary part.

The 74476403 (Würth Elektronik) provides direct electrical equivalence with identical current rating and Q factor. The operating temperature range is reduced to -40°C ~ 105°C, which may limit suitability in applications requiring the full -55°C to 125°C specification. Moisture sensitivity is elevated to MSL 3, requiring controlled storage conditions.

The B82422T1332K000 (EPCOS - TDK) maintains full electrical equivalence and the complete -55°C ~ 125°C operating range. This part carries AEC-Q200 automotive qualification and MSL 1 rating. The package format is specified as 2-SMD, J-Lead with a reduced seated height of 0.083" (2.10mm) compared to the primary part's 0.095" (2.41mm).

The CM322522-3R3JL (Bourns Inc.) offers tighter inductance tolerance (±5%) and extended self resonant frequency (65MHz). The current rating is reduced to 180 mA, which represents a constraint for applications requiring the full 260 mA specification. The package is classified as nonstandard with MSL 1 rating and operating temperature coverage of -40°C ~ 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 74476403 replace the IMC1210EB3R3K in all applications?

A: The 74476403 provides electrical equivalence but operates within a narrower temperature range (-40°C ~ 105°C versus -55°C ~ 125°C). Applications requiring operation below -40°C or above 105°C require the primary part or B82422T1332K000. Moisture sensitivity is also elevated to MSL 3.

Q: What is the primary difference between the B82422T1332K000 and the original part?

A: The B82422T1332K000 maintains full electrical and thermal specifications with AEC-Q200 automotive qualification. The primary difference is package format (2-SMD, J-Lead) and reduced seated height (0.083" versus 0.095"). Verify PCB layout compatibility before substitution.

Q: Is the CM322522-3R3JL suitable for 260 mA applications?

A: No. The CM322522-3R3JL is rated for 180 mA maximum current, which is below the 260 mA specification of the primary part. This substitute is suitable only for applications requiring 180 mA or less.

Q: What does MSL 3 (168 Hours) mean for the 74476403?

A: MSL 3 indicates the component must be used within 168 hours (one week) of package opening under controlled humidity conditions. The primary part and B82422T1332K000 carry MSL 1 (unlimited shelf life), requiring no special moisture control.

Q: Are all substitutes compatible with the 1210 footprint?

A: The 74476403 and B82422T1332K000 are footprint-compatible with standard 1210 (3225 Metric) layouts. The CM322522-3R3JL uses a nonstandard package with similar dimensions (3.20mm x 2.50mm) but may require layout verification.

Q: Which substitute offers the best overall compatibility?

A: The B82422T1332K000 provides the highest compatibility, maintaining the full -55°C ~ 125°C operating range, MSL 1 rating, and AEC-Q200 qualification. Verify the 2-SMD, J-Lead package format against your PCB design before implementation.

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