Z0402C601BSMST Ferrite Bead 600 OHM 0402 Equivalent & Substitute Parts

Part Overview

The Z0402C601BSMST is a 600 Ohm ferrite bead manufactured by KEMET in the 0402 (1005 Metric) surface mount package. This single-line signal filtering component operates at 100 MHz impedance with a maximum current rating of 250mA and DC resistance of 590mOhm. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Impedance @ Frequency	600 Ohms @ 100 MHz
Current Rating (Max)	250mA
DC Resistance (DCR) (Max)	590mOhm
Package / Case	0402 (1005 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Filter Type	Signal Line
Number of Lines	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0402C601BSMST is determined by the following critical parameters:

Primary Matching Criteria:

Impedance @ 100 MHz: 600 Ohms (exact match required for signal filtering performance)
Package / Case: 0402 (1005 Metric) (physical and electrical compatibility)
Mounting Type: Surface Mount (assembly compatibility)
Operating Temperature Range: -55°C ~ 125°C (environmental compatibility)
Filter Type: Signal Line (functional classification)
Number of Lines: 1 (circuit topology compatibility)

Secondary Compatibility Parameters:

Current Rating (Max): 250mA or higher (functional margin)
DC Resistance (DCR): Values within acceptable range for signal integrity
RoHS Status: ROHS3 Compliant (regulatory compliance)
Moisture Sensitivity Level: 1 (Unlimited) (handling and storage compatibility)

Substitute parts are grouped into two categories: Direct Equivalents (matching 600 Ohm impedance at 100 MHz) and Parametric Alternatives (600 Ohm impedance with enhanced current ratings or reduced DC resistance).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Product Status	Packaging Type
Z0402C601BSMST	KEMET	600 Ohms	250mA	590mOhm	0402 (1005 Metric)	Obsolete	Cut Tape (CT) & Digi-Reel®
7427927161	Würth Elektronik	600 Ohms	250mA	560mOhm	0402 (1005 Metric)	Active	Tape & Reel (TR)
BBSY00100505601Y00	Pulse Electronics	600 Ohms	300mA	520mOhm	0402 (1005 Metric)	Active	Tape & Reel (TR)
GZ1005D601CTF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	250mA	500mOhm	0402 (1005 Metric)	Active	Tape & Reel (TR)
GZ1005U601CTF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	300mA	550mOhm	0402 (1005 Metric)	Active	Tape & Reel (TR)
MMZ1005S601CT000	TDK Corporation	600 Ohms	300mA	520mOhm	0402 (1005 Metric)	Active	Cut Tape (CT) & Digi-Reel®
MMZ1005S601HT000	TDK Corporation	600 Ohms	440mA	340mOhm	0402 (1005 Metric)	Active	Cut Tape (CT) & Digi-Reel®
MMZ1005Y601CT000	TDK Corporation	600 Ohms	250mA	540mOhm	0402 (1005 Metric)	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Replacement Candidates (Matched Specifications):

The following parts provide direct functional equivalence to the Z0402C601BSMST with active product status and full regulatory compliance:

7427927161 (Würth Elektronik WE-CBF Series): Matches impedance, current rating, and operating temperature. DC resistance of 560mOhm is within acceptable tolerance. Active product status with ROHS3 compliance and unlimited MSL.
GZ1005D601CTF (Shenzhen Sunlord Electronics GZ-C Series): Matches impedance and current rating. DC resistance of 500mOhm provides improved performance margin. Active product status with ROHS3 compliance and unlimited MSL.
MMZ1005Y601CT000 (TDK Corporation MMZ Series): Matches impedance and current rating. DC resistance of 540mOhm is within acceptable tolerance. Active product status with ROHS3 compliance and unlimited MSL.

Enhanced Performance Alternatives (Higher Current Capability):

The following parts exceed the original current rating specification while maintaining 600 Ohm impedance and full compatibility:

BBSY00100505601Y00 (Pulse Electronics BBSY Series): Provides 300mA current rating with 600 Ohm impedance. DC resistance of 520mOhm. Active product status with ROHS3 compliance and unlimited MSL.
GZ1005U601CTF (Shenzhen Sunlord Electronics GZ-C Series): Provides 300mA current rating with 600 Ohm impedance. DC resistance of 550mOhm. Active product status with ROHS3 compliance and unlimited MSL.
MMZ1005S601CT000 (TDK Corporation MMZ Series): Provides 300mA current rating with 600 Ohm impedance. DC resistance of 520mOhm. Active product status with ROHS3 compliance and unlimited MSL.

Superior Performance Alternative (Highest Current Capability):

MMZ1005S601HT000 (TDK Corporation MMZ-H Series): Provides 440mA current rating with 600 Ohm impedance and significantly reduced DC resistance of 340mOhm. Active product status with ROHS3 compliance and unlimited MSL. Suitable for applications requiring enhanced thermal performance and current handling.

All recommended substitutes maintain the 0402 (1005 Metric) package form factor, surface mount compatibility, -55°C to 125°C operating temperature range, and single-line signal filtering functionality of the original component.

Frequently Asked Questions (FAQ)

Q: Can I use a ferrite bead with different impedance than 600 Ohms?

A: No. The impedance specification at 100 MHz is the primary electrical parameter determining signal filtering performance. Substitution requires matching the 600 Ohm impedance specification. Parts with different impedance values (such as 480 Ohm or 500 Ohm alternatives) alter the frequency response and filtering characteristics and are not suitable direct replacements.

Q: What is the significance of DC Resistance (DCR) variation among substitute parts?

A: DC Resistance affects signal insertion loss and thermal performance. The original Z0402C601BSMST specifies 590mOhm maximum DCR. Substitute parts with lower DCR values (such as 340mOhm in MMZ1005S601HT000) provide improved signal integrity and reduced power dissipation. Substitute parts with DCR values within the 500-560mOhm range maintain equivalent performance characteristics.

Q: Are all substitute parts compatible with the original assembly process?

A: Yes. All recommended substitute parts share the 0402 (1005 Metric) package specification and surface mount mounting type, ensuring compatibility with existing PCB layouts and assembly equipment. Packaging format differences (Cut Tape & Digi-Reel® versus Tape & Reel) affect supply chain logistics but not component functionality or assembly compatibility.

Q: What is the difference between parts with 250mA and 300mA current ratings?

A: The current rating specifies the maximum continuous current the ferrite bead can handle without exceeding thermal limits. The original Z0402C601BSMST is rated for 250mA. Substitute parts with 300mA or 440mA ratings provide additional current handling capacity and thermal margin, making them suitable for applications with higher signal current requirements or stricter thermal constraints.

Q: Why is product status important when selecting a substitute?

A: The original Z0402C601BSMST is classified as obsolete, meaning KEMET no longer manufactures this part. All recommended substitutes have active product status, ensuring continued availability, manufacturing consistency, and long-term supply chain reliability. Active products receive ongoing quality control and process improvements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts are ROHS3 compliant and carry unlimited Moisture Sensitivity Level (MSL 1), matching the environmental and regulatory compliance profile of the original component. This ensures compatibility with modern manufacturing standards and environmental regulations.

Q: Can I mix substitute parts from different manufacturers in the same design?

A: Yes. All recommended substitute parts meet the same electrical specifications (600 Ohm impedance at 100 MHz), package form factor (0402 Metric), and operating temperature range (-55°C to 125°C). They are functionally interchangeable within the circuit design. However, maintaining consistent sourcing from a single manufacturer within a production run is recommended for supply chain consistency.

Q: What does "Signal Line" filter type mean?

A: Signal Line classification indicates the ferrite bead is designed for filtering high-frequency noise on signal traces rather than power distribution lines. This functional classification is maintained across all substitute parts, ensuring they perform the same filtering role in the circuit.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message