Z0603C182DSMST Ferrite Bead Equivalent & Substitute Parts

Part Overview

The Z0603C182DSMST is a 1.8 kOhms @ 100 MHz signal line ferrite bead manufactured by KEMET in the 0603 (1608 Metric) surface mount package. This component is designed for single-line EMI suppression applications with a maximum current rating of 200mA and DC resistance of 850mOhm. The part operates across the temperature range of -55°C to 125°C and is RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity.

The Z0603C182DSMST is classified as obsolete. Equivalent and substitute ferrite beads are available from active manufacturers, providing direct functional replacements with identical or compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	1.8 kOhms
Current Rating (Max)	200mA
DC Resistance (Max)	850mOhm
Package / Case	0603 (1608 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 125°C
Filter Type	Signal Line
Number of Lines	1
Height (Max)	0.037" (0.95mm)
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Ferrite bead substitution is determined by the following critical parameters:

Primary Substitution Criteria:

Impedance @ 100 MHz (must match or be within acceptable tolerance for the application)
Package / Case (0603 / 1608 Metric)
Mounting Type (Surface Mount)
Operating Temperature Range (-55°C to 125°C minimum)
Filter Type (Signal Line)
Number of Lines (1)

Secondary Compatibility Factors:

Current Rating (Max): Substitute must equal or exceed the original 200mA requirement
DC Resistance (Max): Lower DCR values are acceptable and provide improved performance
RoHS3 Compliance and MSL 1 rating

Substitute parts are grouped into two categories:

Category A - Direct Impedance Match (1.8 kOhms @ 100 MHz): Parts with identical impedance specification to the Z0603C182DSMST, providing direct functional equivalence.

Category B - Near-Impedance Match (1.5 kOhms @ 100 MHz): Parts with 1.5 kOhms impedance, representing a 16.7% reduction from the original specification. These are suitable for applications where the impedance tolerance permits lower values.

Category C - Higher Impedance (2 kOhms @ 100 MHz): Parts with 2 kOhms impedance, representing an 11.1% increase from the original specification. These are suitable for applications where higher impedance is acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Product Status	Packaging
Z0603C182DSMST	KEMET	1.8 kOhms	200mA	850mOhm	Obsolete	-
BBBK00160808182Y00	Pulse Electronics	1.8 kOhms	200mA	800mOhm	Active	-
MMZ1608A182BTA00	TDK Corporation	1.8 kOhms	200mA	800mOhm	Active	Tape & Reel (TR)
ACML-0603-152-T	Abracon LLC	1.5 kOhms	200mA	800mOhm	Active	Tape & Reel (TR)
BBBK00160808152Y00	Pulse Electronics	1.5 kOhms	300mA	600mOhm	Active	Tape & Reel (TR)
BBSJ00160808152Y00	Pulse Electronics	1.5 kOhms	200mA	800mOhm	Active	-
BMC1JY1500AN	TE Connectivity Passive Product	1.5 kOhms	200mA	600mOhm	Active	Cut Tape (CT)
GZ1608D152CTF	Shenzhen Sunlord Electronics Co., Ltd.	1.5 kOhms	300mA	600mOhm	Active	Tape & Reel (TR)
MMZ1608Y152BTA00	TDK Corporation	1.5 kOhms	300mA	600mOhm	Active	Cut Tape (CT) & Digi-Reel®
MMZ1608Y152CTA00	TDK Corporation	1.5 kOhms	300mA	500mOhm	Active	Tape & Reel (TR)
BBBK00160808202Y00	Pulse Electronics	2 kOhms	200mA	800mOhm	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Equivalent Selection (Recommended for Direct Replacement):

For applications requiring exact impedance matching at 1.8 kOhms @ 100 MHz, the following active parts provide direct functional equivalence:

MMZ1608A182BTA00 (TDK Corporation): Active product status with identical impedance and current rating. DC resistance of 800mOhm is lower than the original 850mOhm, providing improved performance. Available in Tape & Reel packaging with 36,100 units in stock.
BBBK00160808182Y00 (Pulse Electronics): Active product status with identical impedance and current rating. DC resistance of 800mOhm is lower than the original 850mOhm. Available with 784 units in stock.

Both parts maintain full RoHS3 compliance, MSL 1 rating, and the required operating temperature range of -55°C to 125°C.

Alternative Selection (Lower Impedance - 1.5 kOhms @ 100 MHz):

For applications where 1.5 kOhms impedance is acceptable, the following active parts offer improved current handling and reduced DC resistance:

MMZ1608Y152CTA00 (TDK Corporation): 1.5 kOhms impedance with 300mA current rating and 500mOhm DC resistance. Provides superior performance margin with 35,876 units in stock.
BBBK00160808152Y00 (Pulse Electronics): 1.5 kOhms impedance with 300mA current rating and 600mOhm DC resistance. High inventory availability with 134,478 units in stock.
BMC1JY1500AN (TE Connectivity Passive Product): 1.5 kOhms impedance with 200mA current rating and 600mOhm DC resistance. Available in Cut Tape packaging with 4,934 units in stock.

Higher Impedance Selection (2 kOhms @ 100 MHz):

For applications requiring higher impedance:

BBBK00160808202Y00 (Pulse Electronics): 2 kOhms impedance with 200mA current rating and 800mOhm DC resistance. Active product status with 750 units in stock.

All recommended substitutes maintain RoHS3 compliance, MSL 1 rating, and the required -55°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use a ferrite bead with lower impedance than the original Z0603C182DSMST?

A: Yes, provided the application circuit design permits. A 1.5 kOhms ferrite bead will provide less impedance at 100 MHz than the original 1.8 kOhms specification. This is acceptable in applications where the impedance tolerance allows for lower values. Verify circuit performance requirements before selection.

Q: What is the difference between the 0603 and 1608 Metric package designations?

A: These designations refer to the same physical package. 0603 is the imperial designation (0.063" L x 0.031" W), while 1608 Metric is the metric equivalent (1.60mm x 0.80mm). All substitute parts listed use this identical package format and are mechanically interchangeable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the original Z0603C182DSMST.

Q: What is the significance of DC Resistance (DCR) in ferrite bead selection?

A: DC Resistance represents the resistive loss of the ferrite bead at DC and low frequencies. Lower DCR values reduce power dissipation and heat generation. Substitute parts with lower DCR (600mOhm to 500mOhm) compared to the original 850mOhm provide improved efficiency while maintaining the required impedance characteristics.

Q: Can I substitute a ferrite bead with higher current rating than required?

A: Yes. A substitute part with a higher current rating (such as 300mA versus the original 200mA) is acceptable and provides additional design margin. The part will operate safely within the lower current requirement of the original application.

Q: What packaging options are available for these substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel®. Selection depends on manufacturing and assembly requirements. Tape & Reel packaging is standard for high-volume production, while Cut Tape is suitable for lower-volume applications.

Q: Is the MMZ1608A182BTA00 a direct replacement for the Z0603C182DSMST?

A: Yes. The MMZ1608A182BTA00 provides direct functional equivalence with identical impedance (1.8 kOhms @ 100 MHz), current rating (200mA), and package format (0603 / 1608 Metric). The lower DC resistance (800mOhm versus 850mOhm) represents an improvement. This part is from an active manufacturer (TDK Corporation) with high inventory availability.

Q: Why is the Z0603C182DSMST listed as obsolete?

A: The Z0603C182DSMST is an older KEMET product that has been discontinued. Active equivalent parts from current manufacturers provide the same electrical and mechanical specifications with the advantage of ongoing production support and availability.

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