IMC1812ER331K Equivalent & Substitute Parts

Part Overview

The IMC1812ER331K is a 330 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 85 mA continuous current with a maximum DC resistance of 14 Ohm. This surface mount component in 1812 (4532 Metric) package is designed for applications requiring stable inductance across the operating temperature range of -55°C to 125°C. The part is ROHS3 compliant and carries an active product status. Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility within the same package footprint.

Substiute Parts

IMC1812ER331K

Vishay DaleIn Stock: 1208IMC1812ER331K Datasheet

Current PartRFQ

CM453232-331JL

Bourns Inc.In Stock: 2444CM453232-331JL Datasheet

MFR RecommendedRFQ

CM453232-331KL

Bourns Inc.In Stock: 3431CM453232-331KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IMC1812ER331K are qualified based on the following criteria:

Electrical Parameters (Critical for Substitution):

• Inductance value: 330 µH
• Current rating: 85 mA minimum
• DC resistance: 14 Ohm maximum
• Core material and shielding: Ferrite, unshielded
• Self resonant frequency: 4.6 MHz
• Q factor performance: 40 @ test frequency

Mechanical Parameters (Critical for Substitution):

• Package / Case: 1812 (4532 Metric)
• Mounting type: Surface Mount
• Physical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm)
• Height seated (max): 0.134" (3.40mm)

Compliance Parameters:

• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The substitute parts CM453232-331JL and CM453232-331KL from Bourns Inc. meet all critical electrical and mechanical requirements. Tolerance variations and packaging format differences are noted in the parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

Both Bourns CM453232-331JL and CM453232-331KL are direct electrical and mechanical equivalents to the IMC1812ER331K. Selection between these options depends on packaging and tolerance requirements:

CM453232-331JL Selection Criteria:

• Tighter inductance tolerance (±5% vs ±10%)
• Tape & Reel packaging format
• Suitable for applications requiring higher inductance accuracy

CM453232-331KL Selection Criteria:

• Inductance tolerance matches original part (±10%)
• Cut Tape and Digi-Reel packaging options
• Suitable for mixed packaging requirements or lower volume applications

Temperature Range Consideration: The IMC1812ER331K operates from -55°C to 125°C, while both Bourns substitutes operate from -40°C to 125°C. Applications requiring operation below -40°C must retain the original IMC1812ER331K.

All three parts maintain ROHS3 compliance, MSL Level 1 rating, and active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can CM453232-331JL and CM453232-331KL be used interchangeably with IMC1812ER331K?

A: Yes, both Bourns parts are electrically and mechanically equivalent. They share identical inductance values (330 µH), current ratings (85 mA), DC resistance (14 Ohm max), package dimensions (1812 / 4532 Metric), and core specifications. Differences exist only in inductance tolerance (±5% vs ±10%) and packaging format.

Q: What is the impact of the ±5% tolerance on CM453232-331JL versus ±10% on the other parts?

A: The ±5% tolerance on CM453232-331JL provides tighter inductance accuracy, resulting in inductance values between 314.6 µH and 346.5 µH. The ±10% tolerance on IMC1812ER331K and CM453232-331KL allows values between 297 µH and 363 µH. Applications with strict inductance specifications should specify CM453232-331JL.

Q: Are there packaging differences between the substitute parts?

A: Yes. IMC1812ER331K and CM453232-331JL are supplied in Tape & Reel (TR) format. CM453232-331KL is available in Cut Tape (CT) and Digi-Reel® formats. Packaging selection depends on assembly equipment compatibility and order quantity requirements.

Q: What is the temperature range limitation for substitution?

A: The IMC1812ER331K operates from -55°C to 125°C, while both Bourns substitutes operate from -40°C to 125°C. For applications requiring operation below -40°C, the original IMC1812ER331K must be used.

Q: Do all three parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, carry MSL Level 1 (Unlimited) moisture sensitivity rating, and maintain active product status. REACH and ECCN classifications are identical across all parts.

Q: What determines whether a part can substitute for the IMC1812ER331K?

A: Substitution is determined by matching inductance value, current rating, DC resistance, package dimensions, core type, and shielding configuration. All electrical performance parameters (Q factor, self resonant frequency) and compliance certifications must also align.