IMC1812ES151K Equivalent & Substitute Parts

Part Overview

The IMC1812ES151K is a 150 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1812 (4532 Metric) package. This component operates at 105 mA current rating with a maximum DC resistance of 9 Ohm and is rated for operating temperatures from -55°C to 125°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when electrical characteristics, mechanical dimensions, and thermal ratings align within acceptable tolerances for the same application requirements.

Key Parameters

Parameter	Value
Inductance	150 µH
Inductance Tolerance	±10%
Current Rating	105 mA
DC Resistance (Max)	9 Ohm
Package / Case	1812 (4532 Metric)
Core Type	Ferrite, Unshielded, Drum Core
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the IMC1812ES151K are qualified based on the following criteria:

Electrical Parameters (Critical):

Inductance value: 150 µH
Current rating: 105 mA minimum
DC resistance: 9 Ohm maximum
Core material: Ferrite, unshielded drum core configuration

Mechanical Parameters (Critical):

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

Environmental & Compliance Parameters:

Operating temperature range: -40°C to 125°C minimum (note: original part extends to -55°C)
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

The identified substitutes (CM453232-151JL and CM453232-151KL) meet all critical electrical and mechanical parameters. Inductance tolerance variations (±5% vs ±10%) and packaging format differences (Tape & Reel vs Cut Tape & Digi-Reel) do not affect functional equivalence for this application category.

Parameter Comparison

Parameter	IMC1812ES151K (Vishay Dale)	CM453232-151JL (Bourns Inc.)	CM453232-151KL (Bourns Inc.)
Inductance	150 µH	150 µH	150 µH
Inductance Tolerance	±10%	±5%	±10%
Current Rating (Amps)	105 mA	105 mA	105 mA
DC Resistance (Max)	9 Ohm	9 Ohm	9 Ohm
Q @ Freq	40 @ 790kHz	40 @ 796kHz	40 @ 796kHz
Frequency - Self Resonant	5MHz	5MHz	5MHz
Operating Temperature Range	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)
Size / Dimension	0.177" L x 0.126" W (4.50mm x 3.20mm)	0.177" L x 0.126" W (4.50mm x 3.20mm)	0.177" L x 0.126" W (4.50mm x 3.20mm)
Height - Seated (Max)	0.134" (3.40mm)	0.134" (3.40mm)	0.134" (3.40mm)
Shielding	Unshielded	Unshielded	Unshielded
Core Type	Ferrite Drum Core, Wirewound	Ferrite Drum Core, Wirewound	Ferrite Drum Core, Wirewound
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Both Bourns Inc. CM453232-151JL and CM453232-151KL inductors are functionally equivalent to the Vishay Dale IMC1812ES151K for applications requiring 150 µH inductance at 105 mA current rating in the 1812 surface mount package.

CM453232-151JL Selection Criteria:

Tighter inductance tolerance (±5%) compared to the original part (±10%)
Tape & Reel packaging format matches the original part
Operating temperature range: -40°C to 125°C (note: does not extend to -55°C minimum)
Active product status with ROHS3 compliance

CM453232-151KL Selection Criteria:

Inductance tolerance (±10%) matches the original part specification
Cut Tape & Digi-Reel packaging format for alternative supply chain options
Operating temperature range: -40°C to 125°C (note: does not extend to -55°C minimum)
Active product status with ROHS3 compliance

Selection between CM453232-151JL and CM453232-151KL depends on packaging requirements and supply chain preferences. Both parts maintain electrical equivalence and mechanical compatibility. Applications requiring operation below -40°C require retention of the original IMC1812ES151K part number.

Frequently Asked Questions (FAQ)

Q: Can CM453232-151JL and CM453232-151KL be used interchangeably with IMC1812ES151K?

A: Yes, both Bourns parts are electrically and mechanically equivalent for applications operating within the -40°C to 125°C temperature range. The primary differences are inductance tolerance (±5% vs ±10%) and packaging format. Applications requiring operation below -40°C must use the original IMC1812ES151K.

Q: What is the difference between CM453232-151JL and CM453232-151KL?

A: Both parts share identical electrical specifications (150 µH, 105 mA, 9 Ohm DCR). The difference is packaging format: CM453232-151JL is supplied in Tape & Reel format, while CM453232-151KL is supplied in Cut Tape & Digi-Reel format. Inductance tolerance is ±5% for CM453232-151JL and ±10% for CM453232-151KL.

Q: Are the physical dimensions identical across all three parts?

A: Yes. All three inductors use the 1812 (4532 Metric) package with dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.134" (3.40mm). They are mechanically interchangeable on PCB layouts.

Q: What is the significance of the inductance tolerance difference?

A: CM453232-151JL offers ±5% tolerance, providing tighter inductance accuracy compared to IMC1812ES151K and CM453232-151KL, which both specify ±10%. Applications with strict inductance requirements may benefit from the tighter tolerance of CM453232-151JL.

Q: Are all three parts RoHS3 compliant?

A: Yes. IMC1812ES151K, CM453232-151JL, and CM453232-151KL are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Which part should be selected for low-temperature applications?

A: For applications requiring operation below -40°C, the original IMC1812ES151K must be used, as it specifies an operating temperature range of -55°C to 125°C. Both Bourns substitutes are rated only to -40°C minimum.

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