Z0603C280APWST Ferrite Bead Equivalent & Substitute Parts

Part Overview

The Z0603C280APWST is a 28 Ohm power line ferrite bead manufactured by KEMET in the 0603 (1608 Metric) surface mount package. This component operates at 100 MHz impedance with a 4A current rating and 7mOhm maximum DC resistance. The part is classified as obsolete, necessitating identification of active or alternative equivalent components for new procurement and design continuity.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	28 Ohms
Current Rating (Max)	4A
DC Resistance (Max)	7mOhm
Package / Case	0603 (1608 Metric)
Operating Temperature Range	-40°C to 125°C
Filter Type	Power Line
Number of Lines	1
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Z0603C280APWST ferrite bead is determined by the following critical parameters:

Primary Matching Criteria:

Impedance @ 100 MHz: 28 Ohms (exact match required for primary substitutes)
Package / Case: 0603 (1608 Metric) (mandatory for form factor compatibility)
Filter Type: Power Line (functional classification)
Number of Lines: 1 (single line configuration)
Mounting Type: Surface Mount (assembly compatibility)

Secondary Compatibility Parameters:

Current Rating: 4A minimum (Z0603C280APWST specification)
DC Resistance: 7mOhm maximum
Operating Temperature: -40°C to 125°C minimum range
RoHS3 Compliance and MSL 1 rating

Impedance Tolerance Grouping: Substitute parts are organized into three impedance bands based on 100 MHz measurement:

Exact Match (28 Ohms): FBMJ1608HS280NT, FBMJ1608HS280NTR
Near Match (23-26 Ohms): Z0603C230BPWST, FBMJ1608HM230NT, FBMJ1608HM230NTR, BLM18KG260TN1D, BLM18SG260TN1D, HI0603T260R-10
Acceptable Range (26-30 Ohms): BBUP00160805260Y00, BBUP00160805300Y00

Parts with higher current ratings (6A) or lower DC resistance (6mOhm) than the original specification are acceptable as they exceed minimum requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Operating Temperature	Product Status	Packaging
Z0603C280APWST	KEMET	28 Ohms	4A	7mOhm	-40°C to 125°C	Obsolete	Cut Tape (CT)
Z0603C230BPWST	KEMET	23 Ohms	4A	7mOhm	-40°C to 125°C	Obsolete	Cut Tape (CT)
BBUP00160805260Y00	Pulse Electronics	26 Ohms	6A	7mOhm	-55°C to 125°C	Active	Tape & Reel (TR)
BBUP00160805300Y00	Pulse Electronics	30 Ohms	6A	7mOhm	-55°C to 125°C	Active	Tape & Reel (TR)
BLM18KG260TN1D	Murata Electronics	26 Ohms	6A	7mOhm	-55°C to 125°C	Active	Cut Tape (CT) & Digi-Reel®
BLM18SG260TN1D	Murata Electronics	26 Ohms	6A	7mOhm	-55°C to 125°C	Active	Cut Tape (CT) & Digi-Reel®
FBMJ1608HM230NT	Taiyo Yuden	23 Ohms	4A	7mOhm	-40°C to 125°C	Not For New Designs	Cut Tape (CT) & Digi-Reel®
FBMJ1608HM230NTR	Taiyo Yuden	23 Ohms	6A	6mOhm	-40°C to 125°C	Not For New Designs	Tape & Reel (TR)
FBMJ1608HS280NT	Taiyo Yuden	28 Ohms	4A	7mOhm	-40°C to 125°C	Not For New Designs	Tape & Reel (TR)
FBMJ1608HS280NTR	Taiyo Yuden	28 Ohms	6A	6mOhm	-40°C to 125°C	Not For New Designs	Tape & Reel (TR)
HI0603T260R-10	Laird-Signal Integrity Products	26 Ohms	6A	7mOhm	-40°C to 125°C	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Exact Impedance Match (28 Ohms @ 100 MHz):

FBMJ1608HS280NTR is the primary recommendation. This Taiyo Yuden part provides exact impedance matching to the original Z0603C280APWST, with enhanced specifications including 6A current rating and 6mOhm DC resistance. Although classified as "Not For New Designs," this part maintains full ROHS3 compliance and identical operating temperature range. The Tape & Reel packaging format supports high-volume production requirements.

FBMJ1608HS280NT offers identical impedance and electrical characteristics in Cut Tape packaging, suitable for lower-volume applications.

For Active Product Status with Near-Impedance Match:

BBUP00160805260Y00 (Pulse Electronics, 26 Ohms) and BBUP00160805300Y00 (Pulse Electronics, 30 Ohms) are active products with extended operating temperature range (-55°C to 125°C). Both exceed the original 4A current rating at 6A and maintain 7mOhm DC resistance. These parts are suitable for new designs requiring active component status.

BLM18KG260TN1D and BLM18SG260TN1D (Murata Electronics, 26 Ohms each) are active EMIFIL® series ferrite beads with 6A current rating and 6mOhm DC resistance. Both provide superior thermal performance with extended temperature range and are recommended for applications prioritizing active product availability.

HI0603T260R-10 (Laird-Signal Integrity Products, 26 Ohms) is an active power and signal line ferrite bead with 6A rating, suitable for dual-function filtering applications.

For Impedance-Flexible Applications:

Z0603C230BPWST (KEMET, 23 Ohms) provides the same manufacturer continuity as the original part, though also obsolete. This option is suitable only if existing inventory is available and impedance tolerance permits 5 Ohm reduction.

Compliance and Certification:

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard assembly and storage procedures. All parts are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 26 Ohm ferrite bead for the 28 Ohm Z0603C280APWST?

A: Substitution depends on circuit impedance tolerance. The 26 Ohm parts (BLM18KG260TN1D, BLM18SG260TN1D, HI0603T260R-10, BBUP00160805260Y00) provide 7% lower impedance than the original specification. If the application circuit design permits ±10% impedance variation or greater, these parts are functionally compatible. For applications requiring exact 28 Ohm impedance, use FBMJ1608HS280NTR or FBMJ1608HS280NT.

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

A: Cut Tape packaging supplies individual components on carrier tape, suitable for low to medium volume orders and manual assembly. Tape & Reel packaging provides continuous reel format optimized for automated pick-and-place assembly equipment and high-volume production. Both formats use identical 0603 (1608 Metric) component dimensions and are mechanically interchangeable on standard assembly equipment.

Q: Why are some substitute parts marked "Not For New Designs"?

A: This product status indicates the manufacturer has discontinued active support for new design implementations, though existing inventory remains available. These parts (FBMJ1608HS280NT, FBMJ1608HS280NTR, FBMJ1608HM230NT, FBMJ1608HM230NTR) are suitable for sustaining production of existing products or as interim solutions. For new product development, prioritize parts with "Active" status: BBUP00160805260Y00, BBUP00160805300Y00, BLM18KG260TN1D, BLM18SG260TN1D, HI0603T260R-10.

Q: Does higher current rating (6A vs. 4A) affect circuit performance?

A: Higher current rating indicates the component can safely conduct greater current without thermal degradation. Substituting a 6A-rated part for a 4A-rated part does not alter circuit behavior if the actual operating current remains within the original 4A specification. The higher rating provides additional thermal margin and reliability headroom.

Q: Are there dimensional differences between substitute parts?

A: All parts maintain the 0603 (1608 Metric) package footprint (0.063" L × 0.031" W / 1.60mm × 0.80mm). Height varies slightly: Z0603C280APWST and Taiyo Yuden parts measure 0.039" (1.00mm), while Pulse Electronics BBUP series measures 0.026" (0.65mm) and Murata BLM18SG measures 0.026" (0.65mm). These height variations are within standard PCB assembly tolerances and do not affect electrical performance or mechanical fit.

Q: What is the significance of DC Resistance (DCR) specification?

A: DC Resistance represents resistive losses in the ferrite bead at DC and low frequencies. Lower DCR reduces power dissipation and heat generation. The original Z0603C280APWST specifies 7mOhm maximum. Substitute parts with 6mOhm (FBMJ1608HM230NTR, FBMJ1608HS280NTR) provide improved efficiency. Parts with 7mOhm DCR are directly equivalent in this parameter.

Q: Can I use a 30 Ohm ferrite bead (BBUP00160805300Y00) instead of 28 Ohm?

A: Substitution is application-dependent. The 30 Ohm part provides 7% higher impedance than the original specification. If circuit design permits ±10% impedance tolerance or the application benefits from increased attenuation at 100 MHz, this part is compatible. For impedance-critical applications, use exact 28 Ohm matches.

Q: What is the operating temperature significance of -55°C to 125°C vs. -40°C to 125°C?

A: Extended lower temperature range (-55°C vs. -40°C) indicates the component maintains specified electrical characteristics across a wider temperature envelope. This is beneficial for applications in extreme cold environments or military/aerospace specifications. For standard commercial applications operating above -40°C, both temperature ranges are functionally equivalent.

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