Z0402C601ASMST Equivalent & Substitute Parts

Part Overview

The Z0402C601ASMST is a 600 Ohm ferrite bead manufactured by KEMET in the 0402 (1005 Metric) surface mount package. This component is designed for single-line signal filtering applications with a maximum current rating of 300mA and operates across the temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Impedance @ Frequency	600 Ohms @ 100 MHz
Current Rating (Max)	300mA
DC Resistance (DCR) (Max)	580mOhm
Package / Case	0402 (1005 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Number of Lines	1
Filter Type	Signal Line
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0402C601ASMST is determined by the following critical parameters:

Primary Matching Criteria:

Impedance @ 100 MHz: 600 Ohms (exact match required for frequency response characteristics)
Package / Case: 0402 (1005 Metric) (physical and footprint compatibility)
Number of Lines: 1 (single-line configuration)
Mounting Type: Surface Mount (assembly process compatibility)
Operating Temperature Range: -55°C ~ 125°C (thermal envelope)

Secondary Compatibility Parameters:

Current Rating (Max): 300mA minimum (electrical stress rating)
DC Resistance (DCR): Tolerance band around 580mOhm (power dissipation and signal integrity)
RoHS3 Compliance and MSL Level 1 (regulatory and handling requirements)

Substitute parts are grouped into two categories based on filter type designation: Signal Line ferrite beads (direct functional equivalents) and Power Line ferrite beads (higher current capability variants). All listed substitutes maintain the 600 Ohm impedance specification and 0402 package format.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Filter Type	Product Status	Packaging Type
Z0402C601ASMST	KEMET	600 Ohms	300mA	580mOhm	0402 (1005 Metric)	Signal Line	Obsolete	Cut Tape (CT) & Digi-Reel®
BBSJ00100505481Y00	Pulse Electronics	480 Ohms	300mA	500mOhm	0402 (1005 Metric)	Signal Line	Active	Tape & Reel (TR)
BBSY00100505481Y00	Pulse Electronics	480 Ohms	300mA	500mOhm	0402 (1005 Metric)	Signal Line	Active	Tape & Reel (TR)
BBSY00100505601Y00	Pulse Electronics	600 Ohms	300mA	520mOhm	0402 (1005 Metric)	Signal Line	Active	Tape & Reel (TR)
GZ1005U601CTF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	300mA	550mOhm	0402 (1005 Metric)	Signal Line	Active	Tape & Reel (TR)
MMZ1005S601CT000	TDK Corporation	600 Ohms	300mA	520mOhm	0402 (1005 Metric)	Signal Line	Active	Cut Tape (CT) & Digi-Reel®
MMZ1005S601HT000	TDK Corporation	600 Ohms	440mA	340mOhm	0402 (1005 Metric)	Signal Line	Active	Cut Tape (CT) & Digi-Reel®
PZ1005E601-R45TF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	450mA	340mOhm	0402 (1005 Metric)	Power Line	Active	Tape & Reel (TR)
PZ1005U601-R45TF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	450mA	340mOhm	0402 (1005 Metric)	Power Line	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Signal Line Equivalents (Recommended Primary Substitutes):

The following parts provide direct functional equivalence with identical impedance specification and signal line filter type:

BBSY00100505601Y00 (Pulse Electronics): Maintains 600 Ohm impedance, 300mA current rating, and signal line classification. Active product status with 102,380 units in stock. DCR of 520mOhm is within acceptable tolerance of the original 580mOhm specification.
GZ1005U601CTF (Shenzhen Sunlord Electronics Co., Ltd.): Maintains 600 Ohm impedance and 300mA current rating. Active product status with 105,300 units in stock. DCR of 550mOhm is within acceptable tolerance.
MMZ1005S601CT000 (TDK Corporation): Maintains 600 Ohm impedance, 300mA current rating, and signal line classification. Active product status with 155,200 units in stock. Identical packaging format (Cut Tape & Digi-Reel®) to the original part. DCR of 520mOhm is within acceptable tolerance.

Enhanced Performance Alternatives (Higher Current Capability):

The following parts provide 600 Ohm impedance with increased current ratings and reduced DCR, suitable for applications requiring higher current handling:

MMZ1005S601HT000 (TDK Corporation): Provides 440mA current rating and 340mOhm DCR, representing enhanced performance characteristics. Active product status with 73,478 units in stock.
PZ1005E601-R45TF and PZ1005U601-R45TF (Shenzhen Sunlord Electronics Co., Ltd.): Classified as Power Line ferrite beads with 450mA current rating and 340mOhm DCR. Active product status. These variants are suitable for power distribution applications requiring higher current capacity.

Non-Equivalent Alternative (Different Impedance):

BBSJ00100505481Y00 and BBSY00100505481Y00 (Pulse Electronics): These parts feature 480 Ohm impedance at 100 MHz, which differs from the 600 Ohm specification. These are not direct substitutes for signal line applications requiring 600 Ohm impedance.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and the -55°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can BBSJ00100505481Y00 or BBSY00100505481Y00 be used as substitutes for the Z0402C601ASMST?

A: No. These Pulse Electronics parts feature 480 Ohm impedance at 100 MHz, whereas the Z0402C601ASMST specifies 600 Ohm impedance. Impedance is a critical parameter determining frequency response and filtering characteristics. Using a 480 Ohm part in an application designed for 600 Ohm impedance will result in incorrect signal attenuation and filtering performance.

Q: What is the difference between Signal Line and Power Line ferrite beads in this product group?

A: Signal Line ferrite beads (BBSY00100505601Y00, GZ1005U601CTF, MMZ1005S601CT000, MMZ1005S601HT000) are optimized for low-current signal filtering applications. Power Line ferrite beads (PZ1005E601-R45TF, PZ1005U601-R45TF) are designed for higher current applications and feature reduced DC resistance (340mOhm versus 520-580mOhm) to minimize power dissipation in power distribution circuits. Selection depends on circuit application requirements.

Q: Are the packaging format differences between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) significant for component selection?

A: Packaging format affects supply chain and assembly logistics but does not impact electrical or mechanical compatibility. Both formats are standard surface mount packaging for 0402 components. The choice between Cut Tape and Tape & Reel depends on production volume and assembly equipment capabilities, not component performance.

Q: Why do some substitute parts have higher current ratings (440mA or 450mA) than the original 300mA specification?

A: Higher current ratings indicate enhanced thermal performance and lower DC resistance. These parts can be used in applications requiring the original 300mA specification without derating concerns. However, they are not required for applications within the 300mA envelope. Selection of higher-rated parts provides design margin and reduced power dissipation if circuit conditions permit.

Q: Is the DCR (DC Resistance) difference between 340mOhm and 580mOhm significant?

A: DC resistance affects power dissipation and voltage drop across the ferrite bead. Lower DCR (340mOhm) results in reduced power loss and heat generation. For signal line applications at 300mA, the difference between 520-580mOhm and 340mOhm is approximately 0.078W versus 0.048W at maximum current. Selection depends on thermal budget and power dissipation constraints of the specific application.

Q: Are all substitute parts ROHS3 compliant and MSL Level 1?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the regulatory and handling requirements of the original Z0402C601ASMST component.

Q: Can MMZ1005S601HT000 be used interchangeably with MMZ1005S601CT000?

A: Both parts maintain 600 Ohm impedance and 0402 package format. The primary differences are current rating (440mA versus 300mA) and DCR (340mOhm versus 520mOhm). MMZ1005S601HT000 can be used in applications designed for MMZ1005S601CT000 without compatibility issues, as it provides enhanced performance characteristics. The reverse substitution (CT000 for HT000) is not recommended if the application requires the higher current capability of the HT000 variant.

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