IMC1812EB3R3K Equivalent & Substitute Parts

Part Overview

The IMC1812EB3R3K is a 3.3 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 355 mA with 800mOhm maximum DC resistance. This surface mount component in 1812 (4532 Metric) package is actively produced and ROHS3 compliant. Substitute parts are necessary to address supply chain availability, packaging preferences, or specific performance requirements within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Inductance Tolerance	±10%
Current Rating	355 mA
DC Resistance (Max)	800mOhm
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Shielding	Unshielded
Q @ Frequency	50 @ 7.96MHz
Frequency - Self Resonant	45MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the IMC1812EB3R3K is determined by strict equivalence across the following critical parameters:

Inductance: 3.3 µH (exact match required)
Current Rating: 355 mA (minimum)
DC Resistance: 800mOhm maximum
Package / Case: 1812 (4532 Metric)
Mounting Type: Surface Mount
Shielding: Unshielded
Q @ Frequency: 50 @ 7.96MHz
Frequency - Self Resonant: 45MHz
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

All three substitute parts meet these core electrical and mechanical requirements. Variations in inductance tolerance, core material, and operating temperature range are noted but do not disqualify substitution within the specified parameter envelope.

Parameter Comparison

Parameter	IMC1812EB3R3K (Vishay Dale)	3613C3R3K (TE Connectivity)	CM453232-3R3JL (Bourns)	CM453232-3R3KL (Bourns)
Inductance	3.3 µH	3.3 µH	3.3 µH	3.3 µH
Inductance Tolerance	±10%	±10%	±5%	±10%
Current Rating (Amps)	355 mA	355 mA	355 mA	355 mA
DC Resistance (Max)	800mOhm	800mOhm	800mOhm	800mOhm
Package / Case	1812 (4532 Metric)	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)	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)	0.134" (3.40mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Q @ Frequency	50 @ 7.96MHz	50 @ 7.96MHz	50 @ 7.96MHz	50 @ 7.96MHz
Frequency - Self Resonant	45MHz	45MHz	45MHz	45MHz
Operating Temperature Range	-55°C ~ 125°C	-30°C ~ 100°C	-40°C ~ 125°C	-40°C ~ 125°C
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts are actively produced and ROHS3 compliant, meeting regulatory requirements equivalent to the IMC1812EB3R3K. Selection among substitutes should be based on the following factors:

3613C3R3K (TE Connectivity Passive Product): This substitute operates within a narrower temperature range (-30°C ~ 100°C) compared to the original part. Use this option only when the application does not require the full -55°C ~ 125°C operating range.

CM453232-3R3JL (Bourns Inc.): This substitute offers tighter inductance tolerance (±5% versus ±10%), providing improved precision for applications requiring closer inductance control. Operating temperature range extends to -40°C ~ 125°C, covering most industrial applications.

CM453232-3R3KL (Bourns Inc.): This substitute maintains the same ±10% inductance tolerance as the original part and provides the widest operating temperature range (-40°C ~ 125°C) among the Bourns options. This is the most direct functional equivalent.

All substitutes are available in Tape & Reel packaging, whereas the original part is supplied in Bulk packaging. Packaging format should be confirmed against procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can CM453232-3R3JL be used in place of IMC1812EB3R3K in all applications?

A: CM453232-3R3JL meets all critical electrical and mechanical parameters. However, its ±5% inductance tolerance is tighter than the original ±10%, which may affect circuit performance in applications designed around the broader tolerance. Verify circuit design margins before substitution.

Q: What is the impact of the different operating temperature ranges?

A: The 3613C3R3K operates only to -30°C minimum, whereas the original part and Bourns substitutes operate to -40°C or -55°C. For applications requiring operation below -30°C, use CM453232-3R3JL or CM453232-3R3KL. For applications requiring operation below -40°C, only the original IMC1812EB3R3K meets the full -55°C specification.

Q: Are there differences in core material between these parts?

A: The IMC1812EB3R3K uses iron powder core material, while the TE Connectivity 3613C3R3K and Bourns CM45 series use ferrite core material. Both core types meet the specified electrical performance parameters at the test frequency of 7.96 MHz.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Bulk packaging formats do not affect component electrical or mechanical performance. Packaging selection is driven by assembly process requirements and procurement logistics.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All three substitute parts are ROHS3 compliant, matching the regulatory status of the original IMC1812EB3R3K.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message