IMC1812ES1R2K Equivalent & Substitute Parts

Part Overview

The IMC1812ES1R2K is a 1.2 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 430 mA with a maximum DC resistance of 550mOhm. This surface mount component in 1812 (4532 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part is active and in production, with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the allowed parameter tolerances for this inductor category.

Substiute Parts

IMC1812ES1R2K

Vishay DaleIn Stock: 1094IMC1812ES1R2K Datasheet

Current PartRFQ

744766012

Würth ElektronikIn Stock: 1548744766012 Datasheet

MFR RecommendedRFQ

CM453232-1R2JL

Bourns Inc.In Stock: 2941CM453232-1R2JL Datasheet

MFR RecommendedRFQ

CM453232-1R2KL

Bourns Inc.In Stock: 4423CM453232-1R2KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IMC1812ES1R2K are qualified based on the following critical parameters:

• Inductance Value: 1.2 µH (tolerance range ±5% to ±10%)
• Current Rating: 430 mA minimum
• DC Resistance: 550mOhm maximum
• Package: 1812 (4532 Metric) surface mount
• Shielding Configuration: Unshielded
• Compliance: ROHS3 compliant
• Moisture Sensitivity: MSL 1 (Unlimited)

All identified substitutes meet or exceed these electrical and mechanical requirements. Variations in core material (iron powder vs. ferrite), self-resonant frequency, and operating temperature ranges do not disqualify parts when primary electrical specifications are matched.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original IMC1812ES1R2K. Selection between substitutes should be based on the following considerations:

744766012 (Würth Elektronik): Meets all electrical specifications with ferrite core construction. Operating temperature range is -40°C to 105°C, which is narrower than the original part. Seated height is 0.142" (3.60mm), 0.008" taller than the original. Use when ferrite core characteristics are acceptable and temperature range does not exceed 105°C.

CM453232-1R2JL (Bourns): Offers tighter inductance tolerance of ±5% compared to the original ±10%, with ferrite core construction. Operating temperature extends to 125°C, matching the upper limit of the original. Seated height matches the original at 0.134" (3.40mm). Use when tighter inductance tolerance is required.

CM453232-1R2KL (Bourns): Maintains ±10% inductance tolerance matching the original specification with ferrite core construction. Operating temperature range is -40°C to 125°C. Seated height matches the original at 0.134" (3.40mm). Use as a direct functional equivalent with ferrite core benefits.

Frequently Asked Questions (FAQ)

Q: Can I substitute the IMC1812ES1R2K with any of these parts on my PCB without design changes?

A: Yes, all substitute parts share the same 1812 (4532 Metric) package footprint and mounting type. However, verify that the maximum seated height of 0.142" (3.60mm) for the Würth part does not conflict with your board clearance requirements, as it is 0.008" taller than the original and Bourns alternatives.

Q: What is the difference between iron powder and ferrite core materials in these inductors?

A: The original IMC1812ES1R2K uses iron powder core, while the Würth and Bourns substitutes use ferrite core. Both materials achieve the specified electrical parameters. Core material selection affects frequency response characteristics and self-resonant frequency, but does not impact the primary electrical specifications (inductance, current rating, DC resistance) provided in this reference.

Q: Does the tighter ±5% tolerance of the CM453232-1R2JL provide a performance advantage?

A: Tighter tolerance reduces inductance variation across the production batch. Use the ±5% tolerance part when your circuit design requires more precise inductance values. For applications tolerant of ±10% variation, either tolerance specification is acceptable.

Q: Are there temperature range limitations I should consider?

A: The original IMC1812ES1R2K operates from -55°C to 125°C. The Würth 744766012 has a narrower range of -40°C to 105°C. If your application requires operation below -40°C or above 105°C, use the original part or the Bourns alternatives (CM453232-1R2JL or CM453232-1R2KL), which support -40°C to 125°C.

Q: Can I use these parts interchangeably in high-frequency applications?

A: All parts are tested at 7.96 MHz with Q factor of 50. Self-resonant frequencies differ: original at 80MHz, Würth at 250MHz, and Bourns at 80MHz. Verify that your operating frequency and self-resonant frequency relationship aligns with your circuit requirements before substitution.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original IMC1812ES1R2K specifications.