Z0402C601ESMST Ferrite Bead 600 Ohm 0402 Equivalent & Substitute Parts

Part Overview

The Z0402C601ESMST is a signal line ferrite bead manufactured by KEMET, designed for electromagnetic interference (EMI) suppression in 0402 (1005 Metric) surface mount applications. This component provides 600 Ohms impedance at 100 MHz 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, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Impedance @ Frequency	600 Ohms @ 100 MHz
Current Rating (Max)	300mA
DC Resistance (DCR) (Max)	600mOhm
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

Substitute parts for the Z0402C601ESMST are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria (Exact Match Required):

Impedance @ Frequency: 600 Ohms @ 100 MHz
Current Rating (Max): 300mA
Package / Case: 0402 (1005 Metric)
Mounting Type: Surface Mount
Operating Temperature: -55°C ~ 125°C
Number of Lines: 1

Secondary Consideration (Allowable Variation):

DC Resistance (DCR) (Max): Range 500mOhm to 850mOhm is acceptable within ferrite bead performance tolerances for signal line applications

Parts meeting all primary criteria with DCR within the acceptable range are classified as Direct Equivalents. Parts with identical impedance and current ratings but different DCR values remain functionally compatible for signal line filtering applications where DCR variation does not impact circuit performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Product Status	Height (Max)
Z0402C601ESMST	KEMET	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Obsolete	0.022" (0.55mm)
BLM15HD601SN1D	Murata Electronics	600 Ohms	300mA	850mOhm	0402 (1005 Metric)	Active	0.022" (0.55mm)
7427927291	Würth Elektronik	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Active	0.022" (0.55mm)
BBSJ00100505601Y00	Pulse Electronics	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Active	0.024" (0.60mm)
BBSY00100505601Y00	Pulse Electronics	600 Ohms	300mA	520mOhm	0402 (1005 Metric)	Active	0.024" (0.60mm)
FB100505T-601Y-S-1	Cal-Chip Electronics, Inc.	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Active	0.024" (0.60mm)
GZ1005E601CTF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Active	0.026" (0.65mm)
GZ1005U601CTF	Shenzhen Sunlord Electronics Co., Ltd.	600 Ohms	300mA	550mOhm	0402 (1005 Metric)	Active	0.026" (0.65mm)
MCB1005B601FBPDG	INPAQ Technology Co., Ltd	600 Ohms	300mA	600mOhm	0402 (1005 Metric)	Active	0.024" (0.61mm)

Engineering Selection Recommendations

Direct Equivalents (Highest Compatibility):

The following parts are direct equivalents with active product status and full compliance certifications:

7427927291 (Würth Elektronik WE-CBF Series): Identical impedance, current rating, and DCR specifications. ROHS3 compliant. Recommended as primary replacement for obsolete Z0402C601ESMST.
BBSJ00100505601Y00 (Pulse Electronics BBSJ Series): Meets all electrical specifications. ROHS3 compliant. Active product status with established supply chain.
FB100505T-601Y-S-1 (Cal-Chip Electronics FB Series): Identical electrical parameters. RoHS compliant. Highest inventory availability (330,670 pcs).
MCB1005B601FBPDG (INPAQ Technology MCB-B Series): Meets all specifications with dual filter type designation (Power, Signal Line). ROHS3 compliant. Active status.

Compatible Alternatives (Acceptable DCR Variation):

BLM15HD601SN1D (Murata Electronics EMIFIL® BLM15 Series): DCR of 850mOhm represents acceptable variation for signal line applications. ROHS3 compliant. Active status with high inventory (105,100 pcs).
BBSY00100505601Y00 (Pulse Electronics BBSY Series): DCR of 520mOhm is within acceptable tolerance. ROHS3 compliant. Highest inventory availability (102,380 pcs).
GZ1005E601CTF (Shenzhen Sunlord Electronics GZ-C Series): Identical DCR specification. ROHS3 compliant. Active status.
GZ1005U601CTF (Shenzhen Sunlord Electronics GZ-C Series): DCR of 550mOhm is within acceptable range. ROHS3 compliant. High inventory (105,300 pcs).

All substitute parts maintain the same operating temperature range (-55°C to 125°C), MSL rating (1 - Unlimited), and surface mount 0402 package configuration. Selection should prioritize active product status and supply chain availability for long-term design support.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different DCR than the original Z0402C601ESMST?

A: Yes. For signal line ferrite bead applications, DCR variations between 500mOhm and 850mOhm are functionally compatible when impedance and current ratings remain constant at 600 Ohms @ 100 MHz and 300mA respectively. DCR affects insertion loss and heat dissipation; verify circuit performance requirements before selection.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All listed substitutes use the 0402 (1005 Metric) package with identical length (0.039" / 1.00mm) and width (0.020" / 1.00mm). Height variations range from 0.022" to 0.026", which remain within standard PCB assembly tolerances for surface mount components. Verify PCB clearance specifications for height-critical applications.

Q: What is the difference between "Signal Line" and "Power, Signal Line" filter types?

A: Filter type designation indicates application suitability. "Signal Line" ferrite beads are optimized for EMI suppression on signal traces. "Power, Signal Line" beads (such as MCB1005B601FBPDG) are rated for both power and signal applications. Either type can be used in signal line applications; power-rated beads provide additional design margin.

Q: Which substitute offers the best long-term availability?

A: FB100505T-601Y-S-1 (Cal-Chip Electronics) and BBSY00100505601Y00 (Pulse Electronics) demonstrate the highest current inventory levels (330,670 pcs and 102,380 pcs respectively) and active product status, indicating strong supply chain support.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification or equivalent RoHS compliance status, meeting environmental and regulatory requirements for electronic component manufacturing and assembly.

Q: Can I interchange parts between different manufacturers in production?

A: All listed substitutes meet identical electrical specifications (600 Ohms @ 100 MHz, 300mA, 0402 package) and are functionally interchangeable. However, verify supplier qualification and quality documentation requirements for your specific manufacturing or procurement standards before implementing multi-source strategies.

Q: What does MSL 1 (Unlimited) mean for storage and handling?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture-controlled storage requirements. These components do not require desiccant packaging or baking procedures prior to assembly, simplifying inventory management and reducing handling costs.

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