Z0805C601ASMST Ferrite Bead 600 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The Z0805C601ASMST is a single-line ferrite bead manufactured by KEMET in the Z-SMS series, rated at 600 Ohms impedance at 100 MHz with a maximum current rating of 500mA and DC resistance of 300mOhm. The component is packaged in 0805 (2012 Metric) surface mount format with an operating temperature range of -55°C to 125°C. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	600 Ohms
Current Rating (Max)	500mA
DC Resistance (Max)	300mOhm
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Number of Lines	1 (Signal Line)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the Z0805C601ASMST are selected based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Impedance at 100 MHz: 600 Ohms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Current Rating: 500mA minimum
DC Resistance: 300mOhm maximum
Number of Lines: 1 (single signal line)
Operating Temperature Range: -55°C to 125°C minimum
Mounting Type: Surface Mount

Substitute parts are grouped into two categories:

Category 1 - Full Electrical and Mechanical Equivalents (600 Ohms @ 100 MHz, 500mA, 300mOhm DCR): These parts match all critical parameters of the original Z0805C601ASMST and are direct replacements.

Category 2 - Parametric Equivalents with Improved Specifications: These parts meet or exceed the original specifications in one or more parameters (lower DCR, higher current rating) while maintaining the same impedance, package, and operating temperature range. These parts are suitable for applications where the original specifications are met or exceeded.

Category 3 - Near-Equivalent with Minor Parameter Variance: The ACML-0805-501-T operates at 500 Ohms impedance (versus 600 Ohms) and is included for applications where impedance tolerance permits substitution within the same package and electrical class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package / Case	Height (Max)	Operating Temperature	Product Status
Z0805C601ASMST	KEMET	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Obsolete
7427920415	Würth Elektronik	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active
ACML-0805-501-T	Abracon LLC	500 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Active
BBGK00201209601Y00	Pulse Electronics	600 Ohms	500mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active
BLM21AG601SN1D	Murata Electronics	600 Ohms	600mA	210mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Active
EMI0805R-600	Delevan	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active
FB201209T-601Y-S-1	Cal-Chip Electronics, Inc.	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active
MMZ2012R601AT000	TDK Corporation	600 Ohms	500mA	200mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Last Time Buy
MMZ2012S601AT000	TDK Corporation	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Last Time Buy
MMZ2012Y601BT000	TDK Corporation	600 Ohms	500mA	200mOhm	0805 (2012 Metric)	0.041" (1.05mm)	-55°C ~ 125°C	Last Time Buy
WLBD2012K2U601TP	Walsin Technology Corporation	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	-55°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

For immediate procurement and long-term design support, the following active parts provide full electrical and mechanical equivalence to the Z0805C601ASMST:

7427920415 (Würth Elektronik WE-CBF series): Matches all critical parameters with active product status and high inventory availability (159,270 pcs).
BBGK00201209601Y00 (Pulse Electronics BBGK series): Matches impedance and current rating with improved DC resistance (250mOhm vs. 300mOhm) and active status with substantial inventory (60,013 pcs).
BLM21AG601SN1D (Murata Electronics EMIFIL® BLM21 series): Exceeds original specifications with 600mA current rating and 210mOhm DC resistance while maintaining 600 Ohms impedance and active product status (65,400 pcs).
EMI0805R-600 (Delevan EMI0805R series): Full parameter match with active status and adequate inventory (3,880 pcs).
FB201209T-601Y-S-1 (Cal-Chip Electronics FB series): Complete electrical and mechanical equivalence with active status and high inventory (60,988 pcs).
WLBD2012K2U601TP (Walsin Technology Corporation): Exact parameter match with active status (1,039 pcs).

Secondary Substitutes (Last Time Buy Status):

The following TDK Corporation MMZ series parts meet or exceed specifications but carry Last Time Buy status:

MMZ2012S601AT000: Exact match to original part specifications (101,300 pcs available).
MMZ2012Y601BT000: Improved DC resistance (200mOhm) with same impedance and current rating (165,400 pcs available).
MMZ2012R601AT000: Improved DC resistance (200mOhm) with same impedance and current rating (9,351 pcs available).

Compliance and Certification:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All parts maintain Moisture Sensitivity Level 1 (Unlimited). These certifications ensure regulatory compliance and environmental compatibility across all substitution options.

Height Consideration:

The original Z0805C601ASMST has a maximum height of 0.041" (1.05mm). Substitute parts with 0.043" (1.10mm) maximum height (7427920415, BBGK00201209601Y00, EMI0805R-600, FB201209T-601Y-S-1, WLBD2012K2U601TP) represent a 0.002" (0.05mm) increase. This minor variance is within standard PCB assembly tolerances for 0805 surface mount components and does not affect functional performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Z0805C601ASMST with a part that has lower DC resistance?

A: Yes. Parts with DC resistance lower than 300mOhm (such as BLM21AG601SN1D at 210mOhm, MMZ2012Y601BT000 at 200mOhm, or MMZ2012R601AT000 at 200mOhm) are suitable substitutes. Lower DC resistance reduces power dissipation and heat generation, which is beneficial for circuit performance. These parts maintain the same 600 Ohms impedance at 100 MHz and 500mA current rating.

Q: What is the difference between the KEMET Z0805C601ASMST and the Würth Elektronik 7427920415?

A: Both parts are 600 Ohm ferrite beads in 0805 package with 500mA current rating and 300mOhm DC resistance. The primary difference is product status: the KEMET part is obsolete, while the Würth Elektronik part is active with significantly higher inventory availability (159,270 pcs vs. 739 pcs). The Würth part has a maximum height of 0.043" (1.10mm) compared to 0.041" (1.05mm) for the KEMET part, a difference of 0.002" that is within standard assembly tolerances.

Q: Is the ACML-0805-501-T from Abracon a suitable substitute?

A: The ACML-0805-501-T operates at 500 Ohms impedance rather than 600 Ohms. This part is suitable only for applications where the impedance specification permits a 500 Ohm value or where impedance tolerance is sufficient to accommodate this variance. All other parameters (package, current rating, DC resistance, operating temperature) match the original part. Verify circuit requirements before substitution.

Q: Why do some substitute parts have higher current ratings than the original?

A: Parts such as BLM21AG601SN1D (600mA rating) exceed the original 500mA specification. Higher current ratings indicate the component can safely handle greater current loads without exceeding thermal or electrical limits. These parts are fully compatible with circuits designed for 500mA operation and provide additional design margin for future upgrades or higher-current applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original Z0805C601ASMST is also ROHS3 compliant. All parts are REACH unaffected and classified under ECCN EAR99, ensuring regulatory compliance for commercial and industrial applications.

Q: What is the significance of "Last Time Buy" status for TDK MMZ series parts?

A: Last Time Buy status indicates that the manufacturer will discontinue production after a specified date. Parts with this status (MMZ2012S601AT000, MMZ2012Y601BT000, MMZ2012R601AT000) are currently available but should not be selected for new long-term designs. These parts are suitable for sustaining production of existing designs or short-term applications. For new designs, select from active status parts such as those from Würth Elektronik, Pulse Electronics, Murata, Delevan, Cal-Chip, or Walsin Technology.

Q: Can I use substitute parts with different packaging formats?

A: All substitute parts listed use identical packaging: 0805 (2012 Metric) surface mount. No alternative packaging formats are included in this substitution guide. If alternative package sizes are required, a separate component search is necessary.

Q: What is Moisture Sensitivity Level 1?

A: Moisture Sensitivity Level 1 (MSL 1) indicates unlimited shelf life without moisture control requirements. The component does not require special drying or moisture-barrier packaging. All parts in this substitution guide carry MSL 1 rating, ensuring consistent handling and storage procedures across all options.

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