IMC1812EB470K Equivalent & Substitute Parts

Part Overview

The IMC1812EB470K is a 47 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 140 mA maximum current with 5Ω 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 with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide design flexibility, supply chain alternatives, and equivalent electrical performance across compatible applications.

Key Parameters

Parameter	Value
Inductance	47 µH
Tolerance	±10%
Current Rating	140 mA
DC Resistance (DCR)	5Ω Max
Q Factor @ 2.52 MHz	50
Self Resonant Frequency	10 MHz
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount
Shielding	Unshielded
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility for the IMC1812EB470K is determined by strict equivalence across the following critical parameters:

Inductance value: 47 µH with ±10% tolerance
Current rating: 140 mA minimum
DC resistance: 5Ω maximum
Package / Case: 1812 (4532 Metric) surface mount
Q factor: 50 @ 2.52 MHz
Self resonant frequency: 10 MHz
Shielding configuration: Unshielded
Physical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm), height 0.134" (3.40mm) maximum

Two substitute parts meet these electrical and mechanical requirements: the TE Connectivity 3613C470K and the Bourns CM453232-470KL. Both maintain identical inductance, current rating, DC resistance, and package specifications. Variations in core material (ferrite vs. iron powder) and operating temperature ranges do not affect substitution validity when electrical parameters remain equivalent.

Parameter Comparison

Parameter	IMC1812EB470K (Vishay Dale)	3613C470K (TE Connectivity)	CM453232-470KL (Bourns)
Inductance	47 µH	47 µH	47 µH
Tolerance	±10%	±10%	±10%
Current Rating (Amps)	140 mA	140 mA	140 mA
DC Resistance (DCR)	5Ω Max	5Ω Max	5Ω Max
Q @ 2.52 MHz	50	50	50
Self Resonant Frequency	10 MHz	10 MHz	10 MHz
Shielding	Unshielded	Unshielded	Unshielded
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-55°C ~ 125°C	-30°C ~ 100°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8504.50.8000	8504.50.8000	8504.50.8000

Engineering Selection Recommendations

All three inductors—IMC1812EB470K, 3613C470K, and CM453232-470KL—are active production parts with ROHS3 compliance and MSL Level 1 rating. Selection between these parts should be based on application-specific operating temperature requirements and supply chain availability.

The IMC1812EB470K supports the widest operating temperature range (-55°C ~ 125°C), making it suitable for extended temperature applications. The CM453232-470KL from Bourns maintains the same upper temperature limit (-40°C ~ 125°C) with slightly reduced lower temperature capability. The TE Connectivity 3613C470K operates within -30°C ~ 100°C, which may be limiting for applications requiring sub-zero or high-temperature performance.

All parts carry identical electrical specifications, package dimensions, and regulatory compliance certifications. Inventory availability and lead time considerations should guide final selection when thermal requirements are not a limiting factor.

Frequently Asked Questions (FAQ)

Q: Can the 3613C470K replace the IMC1812EB470K in all applications?

A: The 3613C470K is electrically equivalent with identical inductance, current rating, and DC resistance. However, its operating temperature range (-30°C ~ 100°C) is narrower than the IMC1812EB470K (-55°C ~ 125°C). Substitution is valid only for applications operating within the 3613C470K's temperature limits.

Q: What is the difference between drum core wirewound and ferrite core inductors in this comparison?

A: The IMC1812EB470K uses iron powder drum core construction, while the CM453232-470KL uses ferrite core. Both achieve identical electrical performance at the specified parameters. Core material differences do not affect substitution validity when inductance, current rating, DC resistance, and frequency characteristics remain equivalent.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three inductors share identical package specifications (1812 / 4532 Metric), physical dimensions (0.177" L x 0.126" W), and maximum seated height (0.134"). They are mechanically interchangeable on the same PCB layout.

Q: What packaging formats are available for these parts?

A: The IMC1812EB470K is supplied in Bulk packaging. The 3613C470K and CM453232-470KL are supplied in Tape & Reel (TR) format. Packaging format does not affect electrical performance or substitution eligibility.

Q: Do all substitute parts meet the same regulatory compliance standards?

A: Yes. All three parts are ROHS3 compliant, carry MSL Level 1 (Unlimited) moisture sensitivity rating, and share identical ECCN (EAR99) and HTSUS (8504.50.8000) classifications.

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