IDCP2218ER181M Equivalent & Substitute Parts

Part Overview

The IDCP2218ER181M is a 180 µH unshielded drum core wirewound inductor manufactured by Vishay Dale, rated for 380 mA with a maximum DC resistance of 1.38 Ohm. This surface mount component operates across the temperature range of -25°C to 105°C and is ROHS3 compliant. The part is currently active in production with 702 pieces available in stock. Substitute parts are necessary when the primary component experiences supply constraints, extended lead times, or when design flexibility permits selection from qualified alternatives meeting equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	IDCP2218ER181M
Manufacturer	Vishay Dale
Inductance	180 µH
Inductance Tolerance	±20%
Current Rating	380 mA
DC Resistance (DCR)	1.38 Ohm Max
Core Material	Ferrite
Shielding	Unshielded
Operating Temperature	-25°C ~ 105°C
Mounting Type	Surface Mount
Package Type	Nonstandard
Size	0.228" L x 0.205" W (5.80mm x 5.20mm)
Height - Seated (Max)	0.177" (4.50mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the IDCP2218ER181M is determined by the following critical parameters:

Primary Substitution Criteria:

Inductance value: 180 µH (exact match required)
Current rating: minimum 380 mA
DC resistance: maximum 1.38 Ohm
Core material: Ferrite, unshielded drum core wirewound construction
Mounting type: Surface mount
Operating temperature range: must encompass or exceed -25°C ~ 105°C
RoHS compliance: ROHS3 compliant
Moisture sensitivity: MSL 1 or better

Secondary Compatibility Factors:

Package dimensions and height must accommodate the PCB layout constraints
Inductance tolerance and frequency characteristics must support circuit performance requirements

The substitute parts identified (SDR0603-181KL, SDR0604-181KL from Bourns Inc.) maintain the critical 180 µH inductance specification with equivalent or superior current ratings and DC resistance characteristics. SDR0603-220ML is listed as a substitute reference but operates at a different inductance value (22 µH) and is not a direct functional equivalent.

Parameter Comparison

Parameter	IDCP2218ER181M (Vishay Dale)	SDR0603-181KL (Bourns)	SDR0604-181KL (Bourns)
Inductance	180 µH	180 µH	180 µH
Inductance Tolerance	±20%	±10%	±10%
Current Rating (Amps)	380 mA	300 mA	380 mA
Current - Saturation (Isat)	-	500 mA	500 mA
DC Resistance (DCR)	1.38 Ohm Max	1.6 Ohm Max	1.38 Ohm Max
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Unshielded	Unshielded	Unshielded
Operating Temperature	-25°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.228" L x 0.205" W (5.80mm x 5.20mm)	0.228" L x 0.228" W (5.80mm x 5.80mm)	0.228" L x 0.228" W (5.80mm x 5.80mm)
Height - Seated (Max)	0.177" (4.50mm)	0.154" (3.90mm)	0.189" (4.80mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

SDR0604-181KL (Bourns Inc.) is the primary recommended substitute for the IDCP2218ER181M. This part maintains identical inductance (180 µH), current rating (380 mA), and DC resistance (1.38 Ohm Max) specifications. The SDR0604 series provides an extended operating temperature range (-40°C ~ 125°C) compared to the original part, ROHS3 compliance, and MSL 1 rating. The height difference (0.189" vs 0.177") requires PCB layout verification but remains within typical component clearance tolerances.

SDR0603-181KL (Bourns Inc.) serves as a secondary substitute when space constraints are critical. This part delivers the same 180 µH inductance with tighter tolerance (±10% vs ±20%), lower profile (0.154" height), and extended temperature range. However, the current rating is reduced to 300 mA, which is below the original 380 mA specification. This part is suitable only for applications where the actual circuit current demand does not exceed 300 mA.

Both Bourns substitutes are active products with established supply availability and full compliance certifications matching the original component.

Frequently Asked Questions (FAQ)

Q: Can SDR0603-181KL be used as a direct replacement for IDCP2218ER181M?

A: SDR0603-181KL maintains the 180 µH inductance and ferrite unshielded drum core construction. However, the current rating is 300 mA versus the original 380 mA specification. This part is compatible only if the circuit current demand does not exceed 300 mA. The lower profile (0.154" vs 0.177") may provide PCB layout advantages.

Q: What are the key differences between SDR0604-181KL and the original IDCP2218ER181M?

A: SDR0604-181KL matches the original part in inductance (180 µH), current rating (380 mA), and DC resistance (1.38 Ohm Max). The primary differences are the extended operating temperature range (-40°C ~ 125°C vs -25°C ~ 105°C), tighter inductance tolerance (±10% vs ±20%), and slightly increased height (0.189" vs 0.177"). Both parts are ROHS3 compliant with MSL 1 rating.

Q: Are there dimensional compatibility concerns with the Bourns substitutes?

A: The Bourns SDR0603 and SDR0604 series have identical length and width (0.228" x 0.228" vs 0.228" x 0.205" for the original). Height variations are 0.154" (SDR0603) and 0.189" (SDR0604) compared to 0.177" for the IDCP2218ER181M. PCB layout clearance must be verified for the specific application, particularly for the SDR0604 which is 0.012" taller.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. Both SDR0603-181KL and SDR0604-181KL are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original IDCP2218ER181M specifications.

Q: What is the inductance tolerance difference and does it affect circuit performance?

A: The original IDCP2218ER181M has ±20% tolerance, while both Bourns substitutes offer ±10% tolerance. Tighter tolerance may improve circuit performance consistency but requires circuit analysis to determine if the original ±20% tolerance was already accounted for in design margins.

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