Z0603C471BSMST Ferrite Bead 470 Ohm 0603 Equivalent & Substitute Parts

Part Overview

The Z0603C471BSMST is a single-line ferrite bead manufactured by KEMET in the 0603 (1608 Metric) surface mount package. This component provides 470 Ohms of impedance at 100 MHz with a maximum current rating of 250mA and DC resistance of 450mOhm. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity. Ferrite beads in this impedance and package class are widely used for electromagnetic interference (EMI) suppression in signal line applications across consumer, industrial, and automotive electronics.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	470 Ohms
Package / Case	0603 (1608 Metric)
Current Rating (Max)	250mA
DC Resistance (Max)	450mOhm
Number of Lines	1
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Surface Mount
Filter Type	Signal Line
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0603C471BSMST is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Impedance at 100 MHz: 470 Ohms (exact match required)
Package: 0603 (1608 Metric) surface mount
Number of Lines: 1 (single-line configuration)
Operating Temperature Range: -55°C ~ 125°C minimum
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Current Rating: Must equal or exceed 250mA
DC Resistance: Lower values are acceptable (improved performance)
Physical Dimensions: Compatible with 0603 footprint
Environmental Compliance: ROHS3 Compliant, MSL 1

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (470 Ohm @ 100 MHz): Parts meeting all primary criteria with identical impedance specification. These include MMZ1608Q471BTD25 (TDK), 742863147 (Würth Elektronik), BBGK00160808471Y00 (Pulse Electronics), and BLM18EG471SN1D (Murata Electronics).

Parametric Equivalents (Alternative Impedance Values): Parts meeting package, mounting, and temperature criteria but with different impedance values (390 Ohms, 400 Ohms, or 450 Ohms @ 100 MHz). These are suitable only when circuit design permits impedance variation within the specified range.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Product Status	Height (Max)
Z0603C471BSMST	KEMET	470 Ohms	250mA	450mOhm	0603 (1608 Metric)	Obsolete	0.037" (0.95mm)
MMZ1608Q471BTD25	TDK Corporation	470 Ohms	300mA	700mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
742792643	Würth Elektronik	470 Ohms	400mA	350mOhm	0603 (1608 Metric)	Active	0.039" (1.00mm)
742863147	Würth Elektronik	470 Ohms	500mA	320mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
BBGK00160808471Y00	Pulse Electronics	470 Ohms	400mA	300mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
BLM18EG391SN1D	Murata Electronics	390 Ohms	500mA	300mOhm	0603 (1608 Metric)	Active	0.026" (0.65mm)
BLM18EG471SN1D	Murata Electronics	470 Ohms	500mA	210mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
BMC1JY0400AN	TE Connectivity Passive Product	400 Ohms	400mA	300mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
BMC1JY0450AN	TE Connectivity Passive Product	450 Ohms	400mA	300mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
EMI0603R-450	API Delevan Inc.	450 Ohms	300mA	400mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)
FB160808T-401Y-S	Cal-Chip Electronics, Inc.	400 Ohms	400mA	300mOhm	0603 (1608 Metric)	Active	0.037" (0.95mm)

Engineering Selection Recommendations

Tier 1 Direct Equivalents (Recommended for Direct Replacement):

The following parts provide 470 Ohm impedance at 100 MHz with active product status and full compliance certifications:

BLM18EG471SN1D (Murata Electronics): Offers the lowest DC resistance (210mOhm) and highest current rating (500mA) among direct equivalents. ROHS3 compliant with MSL 1. Suitable for applications requiring superior thermal performance and current headroom.
742863147 (Würth Elektronik, WE-CBF HF Series): Provides 500mA current rating with 320mOhm DC resistance. ROHS3 compliant with MSL 1. Offers balanced performance improvement over the original part.
BBGK00160808471Y00 (Pulse Electronics, BBGK Series): Delivers 400mA current rating with 300mOhm DC resistance. ROHS3 compliant with MSL 1. Maintains physical dimensions identical to the original part.
MMZ1608Q471BTD25 (TDK Corporation, MMZ Series): Provides 300mA current rating with AEC-Q200 automotive qualification. ROHS3 compliant with MSL 1. Suitable for automotive and high-reliability applications.

Tier 2 Parametric Equivalents (Conditional Substitution):

The following parts meet package and environmental specifications but with alternative impedance values. Use only when circuit design permits impedance variation:

BMC1JY0450AN (TE Connectivity, BMC Series): 450 Ohm impedance, 400mA current rating, 300mOhm DC resistance. ROHS3 compliant. Acceptable for applications tolerating ±5% impedance deviation.
BMC1JY0400AN (TE Connectivity, BMC Series): 400 Ohm impedance, 400mA current rating, 300mOhm DC resistance. ROHS3 compliant. Acceptable for applications tolerating ±15% impedance deviation.
BLM18EG391SN1D (Murata Electronics, EMIFIL BLM18 Series): 390 Ohm impedance, 500mA current rating, 300mOhm DC resistance. ROHS3 compliant. Acceptable for applications tolerating ±17% impedance deviation.

All recommended substitutes maintain the 0603 (1608 Metric) package footprint, surface mount configuration, -55°C to 125°C operating temperature range, and ROHS3 compliance required for direct PCB integration.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 Ohm ferrite bead in place of the 470 Ohm Z0603C471BSMST?

A: Substitution with 450 Ohm impedance (BMC1JY0450AN or EMI0603R-450) is acceptable only if circuit design specifications permit impedance variation within ±5%. The 20 Ohm difference represents approximately 4.3% deviation from the original specification. Verify EMI filtering performance requirements before implementation.

Q: What is the difference between the Würth Elektronik 742792643 and 742863147 parts?

A: Both are 470 Ohm ferrite beads in 0603 package from Würth Elektronik's WE-CBF series. The 742863147 (WE-CBF HF) provides superior performance with 500mA current rating and 320mOhm DC resistance compared to 742792643 (400mA, 350mOhm). The 742863147 is the higher-performance variant and is preferred for applications requiring greater current capacity.

Q: Is the Murata BLM18EG471SN1D compatible with the original Z0603C471BSMST footprint?

A: Yes. Both components use the 0603 (1608 Metric) surface mount package with identical length and width dimensions (0.063" L x 0.032" W). The BLM18EG471SN1D has a maximum height of 0.037" (0.95mm), matching the original part specification. PCB layout compatibility is confirmed.

Q: Why does the TDK MMZ1608Q471BTD25 have higher DC resistance (700mOhm) than the original part (450mOhm)?

A: DC resistance variation is inherent to ferrite bead manufacturing and material composition. The MMZ1608Q471BTD25 achieves the same 470 Ohm impedance at 100 MHz through different core material properties. Higher DC resistance results in increased power dissipation at rated current. Verify thermal performance in your specific application before selection.

Q: Can I substitute a 400 Ohm ferrite bead for the 470 Ohm original part?

A: Substitution with 400 Ohm impedance (BMC1JY0400AN or FB160808T-401Y-S) represents approximately 15% deviation from specification and is acceptable only when circuit design explicitly permits this impedance range. This substitution is not recommended for precision EMI filtering applications where impedance tolerance is critical.

Q: What is the significance of the AEC-Q200 rating on the TDK MMZ1608Q471BTD25?

A: AEC-Q200 is an automotive qualification standard indicating the part meets reliability and performance requirements for automotive applications. This certification is relevant only if your application requires automotive-grade components. For non-automotive applications, this certification provides no additional benefit.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this document carry ROHS3 compliance certification, confirming compliance with Restriction of Hazardous Substances Directive requirements. All parts also maintain MSL 1 (Unlimited) moisture sensitivity level, matching the original part specification.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape (CT) is supplied in smaller quantities on cut tape segments. Both formats contain identical components. Selection depends on production volume and assembly equipment compatibility, not electrical performance.

Q: Can I use the Pulse Electronics BBGK00160808471Y00 as a direct replacement without circuit modification?

A: Yes. The BBGK00160808471Y00 provides identical 470 Ohm impedance at 100 MHz, operates across the same -55°C to 125°C temperature range, and uses the 0603 (1608 Metric) surface mount package. The 400mA current rating exceeds the original 250mA specification, and 300mOhm DC resistance is lower than the original 450mOhm, representing performance improvement. No circuit modification is required.

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