IMC1812RW221K Equivalent & Substitute Parts

Part Overview

The IMC1812RW221K is a 220 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 100 mA maximum current with 10 Ohm maximum DC resistance. This surface mount component in 1812 (4532 Metric) package is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production. Substitute parts are identified to provide design flexibility, inventory availability, and compliance options for equivalent circuit performance.

Substiute Parts

IMC1812RW221K

Vishay DaleIn Stock: 993IMC1812RW221K Datasheet

Current PartRFQ

CM453232-221JL

Bourns Inc.In Stock: 1607CM453232-221JL Datasheet

MFR RecommendedRFQ

CM453232-221KL

Bourns Inc.In Stock: 25846CM453232-221KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IMC1812RW221K are qualified based on the following electrical and mechanical parameters:

• Inductance Value: 220 µH (exact match required)
• Current Rating: 100 mA (minimum requirement)
• DC Resistance: 10 Ohm maximum (electrical performance constraint)
• Package / Case: 1812 (4532 Metric) (mechanical compatibility requirement)
• Core Type: Drum Core, Wirewound, Ferrite, Unshielded (functional equivalence)
• Mounting Type: Surface Mount (assembly compatibility)
• Self Resonant Frequency: 4 MHz (frequency domain performance)

The substitute parts CM453232-221JL and CM453232-221KL from Bourns Inc. meet all critical electrical and mechanical parameters. Tolerance variations (±5% and ±10%) and operating temperature ranges are secondary differentiators within the substitution group.

Parameter Comparison

Engineering Selection Recommendations

CM453232-221KL is the primary substitute for the IMC1812RW221K. Both parts share identical inductance (220 µH), current rating (100 mA), DC resistance (10 Ohm maximum), and package dimensions (1812 / 4532 Metric). The CM453232-221KL offers ROHS3 compliance and REACH unaffected status, providing regulatory advantages over the original part. Tolerance specification is ±10%, matching the original. Inventory availability is significantly higher (25,800 pcs vs. 913 pcs).

CM453232-221JL is a secondary substitute with tighter inductance tolerance (±5% vs. ±10%), suitable for applications requiring higher precision. This part also provides ROHS3 compliance and REACH unaffected status. Operating temperature range is -40°C to 125°C, compared to -55°C to 125°C for the original part. Inventory availability is 1,516 pcs.

Both Bourns substitutes maintain electrical performance equivalence across Q factor, self-resonant frequency, and DC resistance specifications. Selection between CM453232-221KL and CM453232-221JL depends on tolerance requirements and operating temperature constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can CM453232-221KL directly replace IMC1812RW221K in existing designs?

A: Yes. Both parts are 220 µH inductors with 100 mA current rating, 10 Ohm maximum DC resistance, and identical 1812 (4532 Metric) package dimensions. Electrical performance parameters (Q factor, self-resonant frequency) are equivalent. No circuit redesign is required.

Q: What is the difference between CM453232-221KL and CM453232-221JL?

A: The primary difference is inductance tolerance: CM453232-221KL is ±10% (matching the original IMC1812RW221K), while CM453232-221JL is ±5% (tighter tolerance). Both share identical inductance value, current rating, DC resistance, and package. Operating temperature range differs slightly: CM453232-221JL and CM453232-221KL both operate -40°C to 125°C, while the original operates -55°C to 125°C.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both CM453232-221KL and CM453232-221JL are ROHS3 compliant. The original IMC1812RW221K is RoHS non-compliant. This is a regulatory advantage of the substitute parts.

Q: Do the substitute parts have the same physical dimensions?

A: Yes. All three parts share identical package dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) with maximum seated height of 0.134" (3.40mm). PCB footprint and assembly compatibility are identical.

Q: What is the moisture sensitivity level for these parts?

A: All three parts (IMC1812RW221K, CM453232-221KL, and CM453232-221JL) have MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.