IMC1812ES681K Equivalent & Substitute Parts

Part Overview

The IMC1812ES681K is a 680 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 50 mA maximum current with 30Ohm maximum DC resistance. This surface mount component in 1812 (4532 Metric) package format is designed for applications requiring stable inductance across the operating temperature range of -55°C to 125°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Substiute Parts

IMC1812ES681K

Vishay DaleIn Stock: 795IMC1812ES681K Datasheet

Current PartRFQ

CM453232-681KL

Bourns Inc.In Stock: 25407CM453232-681KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IMC1812ES681K is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 680 µH with ±10% tolerance
• Current rating: 50 mA minimum
• DC resistance: 30Ohm maximum
• Core material and type: Ferrite, drum core, wirewound construction
• Shielding configuration: Unshielded
• Package format: 1812 (4532 Metric)
• Physical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) with maximum seated height of 0.134" (3.40mm)
• Compliance: ROHS3 compliant, MSL 1

The substitute part CM453232-681KL from Bourns Inc. meets all specified electrical and mechanical parameters, enabling direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the IMC1812ES681K and CM453232-681KL are active production components with ROHS3 compliance and MSL 1 rating. Selection between these parts may be based on availability, packaging format preference (Tape & Reel versus Cut Tape & Digi-Reel), or supply chain requirements. The CM453232-681KL operates across a narrower temperature range (-40°C to 125°C) compared to the IMC1812ES681K (-55°C to 125°C); applications requiring operation below -40°C must use the original Vishay Dale part. All other electrical and mechanical specifications are equivalent, supporting direct substitution in standard operating conditions.

Frequently Asked Questions (FAQ)

Q: Can CM453232-681KL replace IMC1812ES681K in all applications?

A: The CM453232-681KL is electrically and mechanically equivalent for applications operating within the temperature range of -40°C to 125°C. Applications requiring operation below -40°C must use the IMC1812ES681K due to its extended lower temperature rating of -55°C.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both components are packaged in 1812 (4532 Metric) format with identical dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.134" (3.40mm), ensuring PCB layout compatibility.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape for automated assembly equipment. Cut Tape & Digi-Reel packaging provides smaller quantities cut from the reel for manual assembly or lower-volume applications. Both formats contain identical components.

Q: Do both parts meet the same compliance standards?

A: Yes. Both IMC1812ES681K and CM453232-681KL are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level), meeting equivalent regulatory requirements.

Q: What determines substitution eligibility for this inductor?

A: Substitution is based on matching inductance value (680 µH ±10%), current rating (50 mA), DC resistance (30Ohm maximum), core type (ferrite drum core wirewound), shielding configuration (unshielded), package format (1812), physical dimensions, and compliance certifications. Deviations in any of these parameters disqualify a part as a direct substitute.