IMC1812ERR33M Equivalent & Substitute Parts

Part Overview

The IMC1812ERR33M is a 330 nH unshielded wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1812 (4532 Metric) package. This component operates at a maximum current rating of 430 mA with a DC resistance of 550 mOhm and is actively produced. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and package format.

Substiute Parts

IMC1812ERR33M

Vishay DaleIn Stock: 1235IMC1812ERR33M Datasheet

Current PartRFQ

CM453232-R33KL

Bourns Inc.In Stock: 1099CM453232-R33KL Datasheet

MFR RecommendedRFQ

CM453232-R33ML

Bourns Inc.In Stock: 1925CM453232-R33ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the IMC1812ERR33M is determined by the following critical parameters:

• Inductance Value: Must be 330 nH to maintain circuit functionality
• Package / Case: Must be 1812 (4532 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount
• Current Rating: Substitute must meet or exceed 430 mA requirement
• DC Resistance: Lower DCR values are acceptable; higher values require circuit analysis
• Operating Temperature Range: Must support the application's thermal requirements
• Shielding Configuration: Unshielded topology must be maintained
• Compliance Standards: RoHS3 and REACH compliance required

The identified substitute parts CM453232-R33KL and CM453232-R33ML from Bourns Inc. meet these core substitution criteria while offering improved current handling and reduced DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both Bourns substitute parts maintain active product status and full RoHS3 compliance. The CM453232-R33ML offers the closest operational match to the IMC1812ERR33M, providing identical tolerance (±20%), unlimited moisture sensitivity (MSL 1), and superior current handling (605 mA vs. 430 mA) with significantly reduced DC resistance (280 mOhm vs. 550 mOhm). The CM453232-R33KL provides tighter inductance tolerance (±10%) with the same current and resistance advantages but includes MSL 3 moisture sensitivity requiring controlled storage conditions.

Selection between these substitutes depends on application requirements for inductance tolerance precision and moisture exposure during assembly and storage. Both parts are electrically compatible within the 1812 package format and maintain unshielded configuration.

Frequently Asked Questions (FAQ)

Q: Can CM453232-R33KL and CM453232-R33ML be used interchangeably with IMC1812ERR33M?

A: Both Bourns parts are mechanically and electrically compatible substitutes. They share the same 330 nH inductance, 1812 package, and unshielded configuration. The primary differences are inductance tolerance (±10% vs. ±20%), current rating (605 mA vs. 430 mA), and DC resistance (280 mOhm vs. 550 mOhm). Selection depends on circuit requirements for these parameters.

Q: What is the impact of different core materials (Non-Magnetic vs. Ferrite)?

A: The IMC1812ERR33M uses a non-magnetic core, while both Bourns substitutes use ferrite cores. This difference affects frequency response characteristics, as shown in the self-resonant frequency values (250 MHz vs. 165 MHz). Circuit performance at specific operating frequencies must be evaluated.

Q: Does the lower DC resistance of substitute parts affect circuit design?

A: The reduced DC resistance (280 mOhm vs. 550 mOhm) in substitute parts results in lower power dissipation and heat generation. This is generally beneficial but requires verification that circuit impedance matching and signal integrity remain within design specifications.

Q: What are the moisture sensitivity implications?

A: CM453232-R33ML has MSL 1 (unlimited moisture exposure), matching the original part. CM453232-R33KL has MSL 3 (168-hour limit), requiring controlled storage and assembly conditions. Selection depends on manufacturing environment and storage duration requirements.

Q: Are all parts suitable for the full operating temperature range of -55°C to 125°C?

A: The IMC1812ERR33M operates from -55°C to 125°C. Both Bourns substitutes operate from -40°C to 125°C. Applications requiring operation below -40°C must use the original Vishay Dale part.