Equivalent & Substitute Parts for Würth Elektronik 782631331

Part Overview

The Würth Elektronik 782631331 is a single-line ferrite bead designed for signal line filtering in 0603 (1608 Metric) surface mount applications. This component operates at 330 Ohms impedance at 100 MHz with a maximum current rating of 400mA and is rated for automotive-grade reliability under AEC-Q200 standards. The part is active in production and widely available in tape and reel packaging. Alternative equivalent parts may be required due to packaging format availability, inventory constraints, or specific design requirements for current capacity or impedance tolerance.

Substiute Parts

782631331

Würth ElektronikIn Stock: 1830782631331 Datasheet

Current PartRFQ

MMZ1608B301CTDH5

TDK CorporationIn Stock: 500430MMZ1608B301CTDH5 Datasheet

Parametric EquivalentRFQ

MMZ1608R301ATD25

TDK CorporationIn Stock: 5445MMZ1608R301ATD25 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Würth Elektronik 782631331 is determined by the following critical parameters:

• Package / Case: 0603 (1608 Metric) surface mount form factor
• Filter Type: Single signal line ferrite bead
• Operating Temperature: -55°C ~ 125°C range
• Compliance: AEC-Q200 automotive rating, ROHS3 compliance, REACH unaffected status
• Impedance @ 100 MHz: 330 Ohms nominal
• DC Resistance: 250mOhm maximum
• Current Capacity: 400mA minimum requirement

The substitute parts listed below meet the mechanical compatibility requirements (0603 package, surface mount) and electrical performance envelope. Impedance values within the 300-330 Ohm range at 100 MHz are acceptable for signal line ferrite bead applications where the primary function is high-frequency noise attenuation. Substitute parts with equal or higher current ratings and matching DC resistance specifications maintain functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both TDK substitute parts maintain full compatibility with the Würth Elektronik 782631331 across all critical electrical and mechanical parameters. The TDK MMZ1608B301CTDH5 and MMZ1608R301ATD25 are AEC-Q200 rated ferrite beads with identical package dimensions, operating temperature ranges, and compliance certifications.

The 30 Ohm impedance difference (300 Ohms vs. 330 Ohms at 100 MHz) is within acceptable tolerance for signal line ferrite bead applications and does not compromise filtering effectiveness in typical EMI suppression circuits. Both substitute parts offer superior current handling capacity at 500mA compared to the original 400mA specification, providing additional design margin.

Selection between the two TDK alternatives depends on packaging requirements: MMZ1608B301CTDH5 is available in Cut Tape format with Digi-Reel® packaging, while MMZ1608R301ATD25 is supplied in standard Tape & Reel format. Height specifications differ slightly (0.75mm vs. 0.95mm vs. 1.00mm), which may be relevant for applications with strict PCB assembly clearance constraints.

Frequently Asked Questions (FAQ)

Q: Can the TDK MMZ1608B301CTDH5 or MMZ1608R301ATD25 be used as direct replacements for the Würth Elektronik 782631331?

A: Yes. Both TDK parts are parametric equivalents meeting the same 0603 package specification, operating temperature range, AEC-Q200 automotive rating, and RoHS3 compliance. The impedance difference of 30 Ohms at 100 MHz is within acceptable tolerance for signal line ferrite bead filtering applications.

Q: What is the significance of the impedance difference between 330 Ohms and 300 Ohms?

A: In signal line ferrite bead applications, impedance values in the 300-330 Ohm range at 100 MHz provide equivalent high-frequency noise attenuation performance. The 10% difference does not materially affect EMI suppression effectiveness in typical circuit designs.

Q: Are there any height clearance considerations when substituting these parts?

A: The substitute parts have slightly lower maximum heights (0.75mm and 0.95mm) compared to the original part (1.00mm). This provides additional design margin for PCB assembly and component placement. No clearance issues are anticipated in applications designed for the original 1.00mm height specification.

Q: Do the substitute parts maintain the same current handling capability?

A: The TDK substitutes are rated for 500mA maximum current, exceeding the original 400mA specification. This provides additional design margin and allows use in applications requiring higher current capacity without performance degradation.

Q: What packaging format differences exist between the substitute parts?

A: The MMZ1608B301CTDH5 is supplied in Cut Tape with Digi-Reel® packaging, while the MMZ1608R301ATD25 uses standard Tape & Reel format. The original Würth part uses Tape & Reel. Selection depends on assembly line equipment compatibility and inventory management requirements.

Q: Are all parts compliant with automotive and environmental standards?

A: Yes. All three parts carry AEC-Q200 automotive-grade ratings, ROHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (unlimited shelf life). They are suitable for automotive and industrial applications requiring regulatory compliance.