Z0603C300CSMST Ferrite Bead 30 OHM 0603 Equivalent & Substitute Parts

Part Overview

The Z0603C300CSMST is a signal line ferrite bead manufactured by KEMET, designed for electromagnetic interference (EMI) suppression in 0603 (1608 Metric) surface mount applications. This component operates at 30 Ohms impedance at 100 MHz with a maximum current rating of 500mA and 200mOhm DC resistance. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and procurement continuity. Substitute parts maintain functional compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	30 Ohms
Current Rating (Max)	500mA
DC Resistance (Max)	200mOhm
Package / Case	0603 (1608 Metric)
Mounting Type	Surface Mount
Number of Lines	1
Operating Temperature Range	-55°C ~ 125°C
Height (Max)	0.037" (0.95mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0603C300CSMST ferrite bead is determined by the following critical parameters:

Primary Substitution Criteria:

Impedance @ 100 MHz: 30 Ohms (exact match required for signal integrity)
Package / Case: 0603 (1608 Metric) (mechanical and electrical compatibility)
Mounting Type: Surface Mount (assembly process compatibility)
Number of Lines: 1 (functional equivalence)
Operating Temperature Range: -55°C ~ 125°C (environmental compatibility)

Secondary Compatibility Parameters:

Current Rating (Max): 500mA minimum (electrical stress tolerance)
DC Resistance (Max): 200mOhm maximum (thermal and insertion loss considerations)
Height (Max): 0.037" (0.95mm) to 0.039" (1.00mm) (PCB layout clearance)
RoHS3 Compliance (regulatory requirement)
Moisture Sensitivity Level: 1 (handling and storage compatibility)

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria) and Parametric Equivalents (matching primary criteria with improved secondary parameters such as lower DCR or higher current rating).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package / Case	Height (Max)	Product Status	RoHS Status
Z0603C300CSMST	KEMET	30 Ohms	500mA	200mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Obsolete	ROHS3 Compliant
FB160808T-300Y-S	Cal-Chip Electronics, Inc.	30 Ohms	500mA	200mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	RoHS Compliant
FB160808T-300Y-S-2	Cal-Chip Electronics, Inc.	30 Ohms	700mA	200mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	RoHS Compliant
FCM 1608KF-300T07	TAI-TECH Advanced Electronics Co., Ltd.	30 Ohms	700mA	200mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	RoHS Compliant
BBGK00160808300Y00	Pulse Electronics	30 Ohms	800mA	60mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	ROHS3 Compliant
MCB05-300-RC	Allied Components International	30 Ohms	800mA	60mOhm	0603 (1608 Metric)	0.037" (0.94mm)	Active	RoHS Compliant
ILBB0603ER300V	Vishay Dale	30 Ohms	500mA	90mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	ROHS3 Compliant
ACML-0603-310-T	Abracon LLC	31 Ohms	500mA	50mOhm	0603 (1608 Metric)	0.037" (0.95mm)	Active	ROHS3 Compliant
742792605	Würth Elektronik	33 Ohms	500mA	100mOhm	0603 (1608 Metric)	0.039" (1.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical and Mechanical Specifications):

The FB160808T-300Y-S (Cal-Chip Electronics, Inc.) provides a direct equivalent replacement with matching impedance (30 Ohms @ 100 MHz), current rating (500mA), DC resistance (200mOhm), and package dimensions. This part carries active product status and RoHS compliance, ensuring long-term availability and regulatory conformance.

Enhanced Performance Substitutes (Improved Secondary Parameters):

The FB160808T-300Y-S-2 and FCM 1608KF-300T07 both maintain the 30 Ohms impedance specification while offering increased current rating (700mA) compared to the original 500mA specification. These parts are suitable for applications requiring higher current capacity without compromising impedance characteristics. Both maintain active product status and RoHS compliance.

The BBGK00160808300Y00 (Pulse Electronics) and MCB05-300-RC (Allied Components International) provide 30 Ohms impedance with significantly reduced DC resistance (60mOhm versus 200mOhm) and elevated current rating (800mA). These substitutes reduce thermal dissipation and insertion loss while maintaining mechanical compatibility. Both are ROHS3 compliant and actively manufactured.

The ILBB0603ER300V (Vishay Dale) maintains 30 Ohms impedance and 500mA current rating with reduced DC resistance (90mOhm), offering improved thermal performance within the original current specification. This part is ROHS3 compliant and actively produced.

Parametric Alternatives (Minor Impedance Variation):

The ACML-0603-310-T (Abracon LLC) operates at 31 Ohms @ 100 MHz, representing a 3.3% impedance deviation from the 30 Ohms specification. This part offers reduced DC resistance (50mOhm) and maintains 500mA current rating. Selection of this part requires circuit-level analysis to confirm impedance tolerance acceptance.

The 742792605 (Würth Elektronik) operates at 33 Ohms @ 100 MHz, representing a 10% impedance deviation. This part features reduced DC resistance (100mOhm) and maintains 500mA current rating. Selection requires confirmation that the impedance variation does not compromise EMI suppression performance in the target application.

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance or equivalent RoHS certification, ensuring regulatory compatibility with current manufacturing standards. Moisture Sensitivity Level 1 (Unlimited) is consistent across all alternatives, eliminating special handling requirements. All substitute parts carry active product status, providing procurement continuity and long-term supply assurance compared to the obsolete Z0603C300CSMST.

Frequently Asked Questions (FAQ)

Q: Can FB160808T-300Y-S be used as a direct replacement for Z0603C300CSMST?

A: Yes. The FB160808T-300Y-S matches all critical electrical parameters (30 Ohms @ 100 MHz, 500mA current rating, 200mOhm DC resistance) and mechanical specifications (0603 package, 0.037" height). Both are single-line signal ferrite beads with identical operating temperature ranges (-55°C ~ 125°C) and moisture sensitivity levels. The primary advantage is active product status versus the obsolete Z0603C300CSMST.

Q: What is the difference between FB160808T-300Y-S and FB160808T-300Y-S-2?

A: Both parts maintain 30 Ohms impedance @ 100 MHz and 200mOhm DC resistance. The primary difference is current rating: FB160808T-300Y-S is rated for 500mA, while FB160808T-300Y-S-2 is rated for 700mA. The FB160808T-300Y-S-2 provides higher current capacity for applications requiring increased electrical stress tolerance. Both are mechanically and thermally compatible.

Q: Are the BBGK00160808300Y00 and MCB05-300-RC suitable replacements?

A: Both parts maintain 30 Ohms impedance @ 100 MHz and are mechanically compatible in 0603 packages. However, both feature significantly reduced DC resistance (60mOhm versus 200mOhm) and elevated current rating (800mA versus 500mA). These improvements reduce thermal dissipation and insertion loss. Selection depends on whether the original design requires the specific 200mOhm DC resistance characteristic or can benefit from lower resistance performance.

Q: Can ACML-0603-310-T or 742792605 be used as substitutes?

A: These parts represent parametric alternatives with impedance deviations from the 30 Ohms specification. ACML-0603-310-T operates at 31 Ohms (3.3% deviation), while 742792605 operates at 33 Ohms (10% deviation). Substitution requires circuit-level analysis to confirm that impedance tolerance does not compromise EMI suppression effectiveness or signal integrity in the target application. These parts are not recommended for direct replacement without design verification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either ROHS3 compliance or equivalent RoHS certification. The Z0603C300CSMST is ROHS3 compliant, and all listed substitutes maintain equivalent or superior compliance status, ensuring regulatory compatibility with current manufacturing and environmental standards.

Q: What is the significance of DC resistance differences among substitutes?

A: DC resistance affects thermal dissipation and insertion loss in the ferrite bead. The original Z0603C300CSMST specifies 200mOhm maximum DC resistance. Substitutes with lower DC resistance (50mOhm to 100mOhm) reduce power dissipation and heat generation, improving thermal performance. Substitutes with identical 200mOhm DC resistance maintain the original thermal characteristics. Selection depends on thermal budget and insertion loss requirements in the target circuit.

Q: Do all substitute parts have identical package dimensions?

A: All substitute parts use the 0603 (1608 Metric) package with compatible surface mount characteristics. Height specifications range from 0.037" (0.95mm) to 0.039" (1.00mm), representing negligible variation. All parts are mechanically compatible with standard 0603 PCB footprints and assembly processes. The 742792605 has a maximum height of 0.039" (1.00mm), which is within acceptable tolerance for 0603 applications.

Q: What is Moisture Sensitivity Level 1 significance?

A: Moisture Sensitivity Level 1 (Unlimited) indicates that the component does not require special moisture control during storage, handling, or assembly. All listed parts, including the original Z0603C300CSMST and all substitutes, carry MSL 1 rating, eliminating the need for dry-pack storage or baking procedures prior to reflow soldering.

Q: Which substitute offers the best overall performance improvement?

A: The BBGK00160808300Y00 and MCB05-300-RC both provide 30 Ohms impedance with 60% reduction in DC resistance (60mOhm versus 200mOhm) and 60% increase in current rating (800mA versus 500mA). These improvements reduce thermal dissipation and provide higher electrical stress tolerance. Selection between these two depends on specific supply chain and cost considerations, as both offer identical electrical and mechanical performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message