Z0805C751DSMST Ferrite Bead 750 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The Z0805C751DSMST is a single-line ferrite bead manufactured by KEMET in the 0805 (2012 Metric) surface mount package. This component provides 750 Ohms of impedance at 100 MHz with a maximum current rating of 400mA and 300mOhm DC resistance. The part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing design support and procurement.

Ferrite beads function as passive EMI filters for signal line applications, attenuating high-frequency noise while maintaining low DC resistance. The obsolete status of the Z0805C751DSMST necessitates evaluation of functionally equivalent alternatives from active product lines that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Impedance @ Frequency	750 Ohms @ 100 MHz
Current Rating (Max)	400mA
DC Resistance (DCR) (Max)	300mOhm
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Number of Lines	1
Height (Max)	0.041" (1.05mm)
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0805C751DSMST is constrained by the following critical parameters:

Impedance Specification: The original part specifies 750 Ohms @ 100 MHz. All substitute parts identified in the provided data specify 600 Ohms @ 100 MHz, representing a 20% reduction in impedance value. This impedance difference is a fundamental electrical parameter that affects filtering performance and noise attenuation characteristics.

Package and Mechanical Compatibility: All substitute parts maintain the 0805 (2012 Metric) surface mount package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm), ensuring PCB layout compatibility without redesign.

Current Rating and DC Resistance: Substitute parts offer current ratings ranging from 400mA to 600mA, with DC resistance values between 200mOhm and 300mOhm. The original part's 400mA / 300mOhm specification is met or exceeded by all identified substitutes.

Environmental and Compliance Parameters: All substitute parts operate across the identical temperature range (-55°C ~ 125°C), maintain ROHS3 compliance, and feature MSL 1 (Unlimited) moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

Product Status Consideration: The original Z0805C751DSMST is obsolete. All identified substitute parts carry active or last-time-buy status, providing procurement viability for ongoing production requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Height (Max)	Product Status	RoHS Status
Z0805C751DSMST	KEMET	750 Ohms	400mA	300mOhm	0805 (2012 Metric)	0.041" (1.05mm)	Obsolete	ROHS3 Compliant
7427920415	Würth Elektronik	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	ROHS3 Compliant
BBGK00201209601Y00	Pulse Electronics	600 Ohms	500mA	250mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	ROHS3 Compliant
BLM21AG601SN1D	Murata Electronics	600 Ohms	600mA	210mOhm	0805 (2012 Metric)	0.041" (1.05mm)	Active	ROHS3 Compliant
CZB2AGTTD601P	KOA Speer Electronics, Inc.	600 Ohms	400mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	ROHS3 Compliant
EMI0805R-600	Delevan	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	ROHS3 Compliant
FB201209T-601Y-S-1	Cal-Chip Electronics, Inc.	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	RoHS Compliant
MMZ2012R601AT000	TDK Corporation	600 Ohms	500mA	200mOhm	0805 (2012 Metric)	0.041" (1.05mm)	Last Time Buy	ROHS3 Compliant
MMZ2012S601AT000	TDK Corporation	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.041" (1.05mm)	Last Time Buy	ROHS3 Compliant
MMZ2012Y601BT000	TDK Corporation	600 Ohms	500mA	200mOhm	0805 (2012 Metric)	0.041" (1.05mm)	Last Time Buy	ROHS3 Compliant
WLBD2012K2U601TP	Walsin Technology Corporation	600 Ohms	500mA	300mOhm	0805 (2012 Metric)	0.043" (1.10mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection Criteria:

All identified substitute parts operate within the same 0805 (2012 Metric) surface mount package and maintain full compatibility with the original Z0805C751DSMST footprint. The critical distinction between the original part and all substitutes is the impedance specification: the original provides 750 Ohms @ 100 MHz, while all substitutes provide 600 Ohms @ 100 MHz.

Active Product Status Priority:

For new designs and ongoing production, parts with Active product status are preferred over Last Time Buy designations. Active parts include:

7427920415 (Würth Elektronik)
BBGK00201209601Y00 (Pulse Electronics)
BLM21AG601SN1D (Murata Electronics)
CZB2AGTTD601P (KOA Speer Electronics, Inc.)
EMI0805R-600 (Delevan)
FB201209T-601Y-S-1 (Cal-Chip Electronics, Inc.)
WLBD2012K2U601TP (Walsin Technology Corporation)

Last Time Buy parts (MMZ2012R601AT000, MMZ2012S601AT000, MMZ2012Y601BT000 from TDK Corporation) remain available but represent end-of-life product lines.

Compliance and Regulatory Alignment:

All substitute parts maintain ROHS3 compliance or equivalent RoHS compliance status, ensuring regulatory alignment with the original Z0805C751DSMST. Moisture sensitivity levels remain at MSL 1 (Unlimited) across all alternatives, eliminating moisture-related handling constraints.

Current Rating and DC Resistance Considerations:

The original part specifies 400mA maximum current with 300mOhm DC resistance. Substitute parts offer equal or superior current ratings (400mA to 600mA) and DC resistance values (200mOhm to 300mOhm). Parts with lower DC resistance values (200mOhm) provide reduced power dissipation characteristics compared to the original specification.

Height and Dimensional Compatibility:

Most substitute parts maintain the original 0.041" (1.05mm) maximum height (BLM21AG601SN1D, MMZ2012R601AT000, MMZ2012S601AT000, MMZ2012Y601BT000). Remaining substitutes specify 0.043" (1.10mm) maximum height, representing a 0.002" (0.05mm) increase. This minor dimensional variance remains within typical PCB assembly tolerances for 0805 package components.

Frequently Asked Questions (FAQ)

Q: Can the Z0805C751DSMST be directly replaced with a 600 Ohm ferrite bead?

A: Direct replacement requires circuit-level evaluation. The original part specifies 750 Ohms @ 100 MHz impedance, while all identified substitutes provide 600 Ohms @ 100 MHz. This 20% impedance reduction alters the filtering characteristics and noise attenuation profile. Circuit designers must confirm that 600 Ohm impedance meets the application's EMI filtering requirements before implementing substitution.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts maintain the 0805 (2012 Metric) surface mount package with identical footprint dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). PCB layout modifications are not required for mechanical compatibility. Height variations (0.041" to 0.043" maximum) remain within standard assembly tolerances for this package class.

Q: What is the difference between Active and Last Time Buy product status?

A: Active parts are in current production and available for indefinite procurement. Last Time Buy parts are end-of-life products with limited remaining inventory; once depleted, these parts become unavailable. For new designs and long-term production, Active status parts are recommended. Last Time Buy parts (TDK MMZ series) are suitable only for legacy product support with defined end-of-life timelines.

Q: Do all substitute parts meet the same environmental and compliance requirements?

A: Yes. All substitute parts operate across the identical temperature range (-55°C ~ 125°C), maintain ROHS3 compliance or equivalent RoHS compliance, and feature MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compatibility is maintained across all alternatives.

Q: Which substitute part offers the lowest DC resistance?

A: BLM21AG601SN1D (Murata Electronics) and MMZ2012R601AT000 and MMZ2012Y601BT000 (TDK Corporation) specify 200mOhm maximum DC resistance, compared to the original part's 300mOhm specification. Lower DC resistance reduces power dissipation in the ferrite bead element. BLM21AG601SN1D carries Active product status, while the TDK parts are Last Time Buy.

Q: What is the maximum current rating difference between the original and substitute parts?

A: The original Z0805C751DSMST specifies 400mA maximum current. Substitute parts range from 400mA to 600mA. BLM21AG601SN1D (Murata Electronics) provides the highest current rating at 600mA, offering 50% additional current capacity. CZB2AGTTD601P (KOA Speer Electronics, Inc.) matches the original 400mA specification while providing Active product status.

Q: Are there packaging format differences among the substitute parts?

A: Yes. Most substitute parts are supplied in Cut Tape (CT) or Tape & Reel (TR) formats. The original Z0805C751DSMST is supplied in Tape & Reel (TR) format. Packaging format selection depends on procurement volume and assembly line requirements. Tape & Reel format is standard for high-volume production; Cut Tape format is suitable for lower-volume or prototype applications.

Q: Which substitute part most closely matches the original Z0805C751DSMST specifications?

A: CZB2AGTTD601P (KOA Speer Electronics, Inc.) provides the closest electrical match, maintaining the original 400mA current rating and 300mOhm DC resistance specifications. However, the impedance remains 600 Ohms @ 100 MHz rather than the original 750 Ohms. This part carries Active product status and is available in Tape & Reel packaging.

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