Würth Elektronik 742792607 Ferrite Bead 68 Ohm 0603 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 742792607 is a single-line ferrite bead designed for signal line filtering in 0603 (1608 Metric) surface mount packages. Rated at 68 Ohms impedance at 100 MHz with 300mA maximum current and 300mOhm DC resistance, this component operates across the -55°C to 125°C temperature range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	68 Ohms
Current Rating (Max)	300mA
DC Resistance (Max)	300mOhm
Package / Case	0603 (1608 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C to 125°C
Filter Type	Signal Line
Number of Lines	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 742792607 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package / Case: 0603 (1608 Metric) surface mount only
Filter Type: Signal Line ferrite bead
Number of Lines: Single line configuration
Operating Temperature Range: -55°C to 125°C minimum
RoHS3 Compliance and MSL 1 rating required

Impedance Tolerance Bands: Substitute parts are grouped by impedance value at 100 MHz. The 742792607 operates at 68 Ohms, placing it between the 60 Ohm and 80 Ohm standard impedance values available from multiple manufacturers. Substitutes at 60 Ohms, 68-70 Ohms, and 80 Ohms are provided based on circuit tolerance requirements.

Current Rating Considerations: The original part specifies 300mA maximum current. Substitute parts with equal or higher current ratings are electrically compatible. Parts with lower current ratings require circuit-level current verification before selection.

DC Resistance (DCR): Maximum DCR of 300mOhm is the baseline specification. Substitutes with lower DCR values provide improved performance characteristics without circuit incompatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Product Status	Packaging
742792607	Würth Elektronik	68 Ohms	300mA	300mOhm	Obsolete	Tape & Reel
74279261	Würth Elektronik	80 Ohms	200mA	300mOhm	Active	Tape & Reel
74279267	Würth Elektronik	60 Ohms	500mA	300mOhm	Active	Tape & Reel
2506036007Y0	Fair-Rite Products Corp.	60 Ohms	400mA	150mOhm	Active	Tape & Reel
2506036007Z0	Fair-Rite Products Corp.	60 Ohms	450mA	250mOhm	Active	Tape & Reel
2506038007Y0	Fair-Rite Products Corp.	80 Ohms	400mA	150mOhm	Active	Tape & Reel
ACML-0603-600-T	Abracon LLC	60 Ohms	600mA	300mOhm	Active	Tape & Reel
BBBK00160808600Y00	Pulse Electronics	60 Ohms	400mA	100mOhm	Active	Tape & Reel
BBBK00160808800Y00	Pulse Electronics	80 Ohms	400mA	150mOhm	Active	Tape & Reel
BBGK00160808700Y00	Pulse Electronics	70 Ohms	600mA	100mOhm	Active	Tape & Reel
BBGK00160808800Y00	Pulse Electronics	80 Ohms	600mA	100mOhm	Active	Tape & Reel

Engineering Selection Recommendations

Active Product Status Priority: All listed substitute parts maintain active product status with manufacturers, ensuring long-term availability and supply chain stability. The original 742792607 is obsolete and should be replaced in new designs.

Würth Elektronik WE-CBF Series Continuity: For designs requiring manufacturer continuity within the Würth Elektronik ecosystem, the 74279267 (60 Ohms, 500mA) and 74279261 (80 Ohms, 200mA) provide direct series compatibility. Both parts maintain identical package dimensions, operating temperature range, and RoHS3 compliance.

Multi-Manufacturer Options: Fair-Rite Products Corp., Abracon LLC, and Pulse Electronics provide parametrically equivalent alternatives across 60 Ohm, 70 Ohm, and 80 Ohm impedance values. These parts meet or exceed the original specifications in current rating and DC resistance performance.

Compliance and Certification: All substitute parts listed maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, matching the regulatory requirements of the original component.

Frequently Asked Questions (FAQ)

Q: Can I use an 80 Ohm ferrite bead as a direct replacement for the 68 Ohm original part?

A: An 80 Ohm substitute operates at higher impedance than the original 68 Ohm specification. Circuit-level analysis is required to confirm that the increased impedance does not degrade filtering performance or introduce unintended frequency response changes. The 74279261 (80 Ohm) and BBGK00160808800Y00 (80 Ohm) are electrically compatible in package and mounting, but impedance tolerance must be verified against circuit requirements.

Q: What is the difference between the 60 Ohm options from Fair-Rite (2506036007Y0 vs. 2506036007Z0)?

A: Both parts operate at 60 Ohms impedance with identical package and temperature specifications. The primary difference is DC resistance: 2506036007Y0 specifies 150mOhm maximum, while 2506036007Z0 specifies 250mOhm maximum. The 2506036007Y0 provides lower insertion loss. Current ratings differ at 400mA and 450mA respectively, both exceeding the original 300mA specification.

Q: Are the Pulse Electronics BBGK series parts (70 Ohm and 80 Ohm) suitable for this application?

A: Yes. The BBGK00160808700Y00 (70 Ohms) and BBGK00160808800Y00 (80 Ohms) meet all package, temperature, and compliance requirements. Both provide superior current ratings (600mA) and lower DC resistance (100mOhm) compared to the original specification, making them suitable for designs with higher current demands or lower insertion loss requirements.

Q: Does the Abracon ACML-0603-600-T meet the original specifications?

A: The ACML-0603-600-T operates at 60 Ohms impedance with 600mA current rating and 300mOhm DC resistance, matching the original DCR specification. It provides higher current capacity than the 742792607 and maintains identical package, temperature range, and compliance certifications.

Q: What is the impact of lower DC resistance on circuit performance?

A: Lower DC resistance reduces insertion loss and heat dissipation in the ferrite bead. Parts with 100mOhm or 150mOhm DCR (such as Pulse Electronics and Fair-Rite options) provide improved efficiency compared to the original 300mOhm specification. This is a performance enhancement with no negative circuit impact.

Q: Can I mix substitute parts from different manufacturers in the same design?

A: Yes, provided each part meets the circuit's impedance, current, and package requirements independently. All listed substitutes use identical 0603 (1608 Metric) packages and surface mount configuration, allowing interchangeability at the component level. Verify impedance tolerance requirements before mixing parts with different impedance values (60 Ohm, 70 Ohm, 80 Ohm).

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