Equivalent & Substitute Parts for 78279220321

Part Overview

The Würth Elektronik 78279220321 is a single-line power ferrite bead in 0805 (2012 Metric) surface mount package, rated for 320 Ohms impedance at 100 MHz with a maximum current rating of 2.5A. This component is part of the WE-MPSA series and maintains Active product status with AEC-Q200 automotive qualification. Ferrite beads serve as electromagnetic interference (EMI) suppression elements in power distribution circuits, and equivalent substitutes are identified based on matching electrical characteristics, package dimensions, thermal ratings, and compliance certifications.

Substiute Parts

78279220321

Würth ElektronikIn Stock: 408478279220321 Datasheet

Current PartRFQ

782853301

Würth ElektronikIn Stock: 10379782853301 Datasheet

Parametric EquivalentRFQ

782853331

Würth ElektronikIn Stock: 5095782853331 Datasheet

Parametric EquivalentRFQ

MPZ2012S331ATD25

TDK CorporationIn Stock: 36586MPZ2012S331ATD25 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for ferrite beads is determined by the following criteria:

Primary Matching Parameters:

• Package / Case: 0805 (2012 Metric) surface mount form factor
• Number of Lines: Single-line configuration
• Filter Type: Power Line application
• Operating Temperature Range: -55°C to 125°C
• DC Resistance (Max): 50 mOhm
• Compliance: AEC-Q200 automotive qualification, RoHS3 compliance, REACH unaffected status

Impedance and Current Tolerance: Substitute parts are grouped based on impedance values within the 300–330 Ohms range at 100 MHz. Current ratings of 2.5A or higher are acceptable for direct substitution. Parts with impedance values outside this range or current ratings below 2.5A are not equivalent.

Three substitute parts meet these criteria: two from Würth Elektronik (WE-CBA series) and one from TDK Corporation (MPZ series).

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain Active product status and carry AEC-Q200 automotive qualification, ensuring compliance with automotive EMI suppression standards. All parts are RoHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.

782853301 (Würth Elektronik WE-CBA): This part operates at 300 Ohms impedance, representing a 6.25% reduction from the 320 Ohms specification. The current rating increases to 3A, providing additional margin. Identical package dimensions and height ensure direct mechanical compatibility.

782853331 (Würth Elektronik WE-CBA): This part operates at 330 Ohms impedance, representing a 3.125% increase from the 320 Ohms specification. The current rating increases to 3A. Identical package dimensions and height ensure direct mechanical compatibility.

MPZ2012S331ATD25 (TDK Corporation MPZ): This part operates at 330 Ohms impedance with a 2.5A current rating matching the original specification. Package dimensions are nominally equivalent with a maximum height of 0.041" (1.05 mm), which is 0.002" lower than the main part. Width dimension is 0.049" (1.25 mm) compared to 0.047" (1.20 mm) for the main part.

Frequently Asked Questions (FAQ)

Q: Can 782853301 be used as a direct replacement for 78279220321?

A: Yes. The 782853301 operates at 300 Ohms impedance versus 320 Ohms, representing a 6.25% impedance reduction. The increased current rating of 3A provides additional thermal margin. Package dimensions, operating temperature range, DC resistance, and all compliance certifications are identical. This substitution is valid for applications where the lower impedance value is acceptable within circuit design tolerances.

Q: What is the impedance difference between 782853331 and the main part?

A: The 782853331 operates at 330 Ohms impedance compared to 320 Ohms for part 78279220321, representing a 3.125% increase. All other electrical and mechanical parameters are equivalent. This substitution is valid for applications where the higher impedance value is acceptable within circuit design tolerances.

Q: How does the TDK MPZ2012S331ATD25 compare dimensionally?

A: The MPZ2012S331ATD25 maintains the same length (0.079" / 2.00 mm) and operating temperature range as the main part. The maximum height is 0.041" (1.05 mm) versus 0.043" (1.10 mm), providing 0.002" additional clearance. The width is 0.049" (1.25 mm) versus 0.047" (1.20 mm), a difference of 0.002". These dimensional variations remain within typical PCB layout tolerances for 0805 surface mount components.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. All three substitute parts carry AEC-Q200 automotive qualification, matching the main part specification. All parts are also RoHS3 compliant and REACH unaffected.

Q: What is the current rating consideration for substitution?

A: The main part 78279220321 is rated for 2.5A maximum current. Substitute parts 782853301 and 782853331 are rated for 3A, providing additional current capacity. The MPZ2012S331ATD25 matches the 2.5A rating. All three substitutes are acceptable for applications requiring 2.5A or less.

Q: Can these parts be used interchangeably in the same PCB layout?

A: Yes. All substitute parts use the 0805 (2012 Metric) surface mount package with identical footprints. Dimensional variations are minimal and fall within standard PCB design tolerances. No layout modifications are required for mechanical compatibility.

Q: What is the impedance tolerance range for substitution?

A: Substitute parts operate within the 300–330 Ohms range at 100 MHz. The main part specifies 320 Ohms. Impedance variations of ±10 Ohms from the main specification are acceptable for ferrite bead substitution in power line filtering applications, provided circuit design margins accommodate the impedance variation.