Equivalent & Substitute Parts for Würth Elektronik 782853321

Part Overview

The Würth Elektronik 782853321 is a power line ferrite bead designed for electromagnetic interference suppression in single-line applications. This 0805 (2012 Metric) surface mount component operates at 320 Ohms impedance at 100 MHz with a maximum current rating of 2A and 50mOhm DC resistance. The part is Active in product status and carries AEC-Q200 automotive qualification, making it suitable for applications requiring reliable EMI filtering across industrial and automotive environments. Alternative equivalent parts are available to accommodate different current requirements, impedance specifications, or inventory availability while maintaining core electrical and mechanical compatibility.

Substiute Parts

782853321

Würth ElektronikIn Stock: 4904782853321 Datasheet

Current PartRFQ

78279220321

Würth ElektronikIn Stock: 408478279220321 Datasheet

Parametric EquivalentRFQ

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 of ferrite beads in power line applications is determined by the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 0805 (2012 Metric) surface mount form factor
• Filter Type: Power Line single-line configuration
• Impedance @ Frequency: 320 Ohms @ 100 MHz (primary specification) or closely adjacent values (300 Ohms, 330 Ohms)
• DC Resistance (DCR) (Max): 50mOhm maximum
• Operating Temperature Range: -55°C ~ 125°C
• Ratings: AEC-Q200 compliance
• RoHS Status: ROHS3 Compliant

Secondary Substitution Criteria:

• Current Rating (Max): Varies between 2A and 3A depending on part selection
• Manufacturer: Würth Elektronik or TDK Corporation
• Series: WE-CBA, WE-MPSA, or MPZ

Parts are grouped as substitutes when they maintain identical package dimensions, impedance tolerance bands, DC resistance specifications, and compliance certifications. Current rating variations are acceptable when the substitute part meets or exceeds the application requirement. Impedance values within the 300–330 Ohms range at 100 MHz are considered parametrically equivalent for general power line filtering applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Impedance Match (320 Ohms @ 100 MHz):

The part 78279220321 (Würth Elektronik WE-MPSA series) provides an exact impedance match at 320 Ohms @ 100 MHz with increased current capacity of 2.5A compared to the main part's 2A rating. This substitute is suitable for applications requiring higher current handling while maintaining identical impedance filtering characteristics. Both parts carry AEC-Q200 certification and ROHS3 compliance.

Impedance Variants (300–330 Ohms @ 100 MHz):

Parts 782853301 (300 Ohms) and 782853331 (330 Ohms) represent parametrically equivalent alternatives with impedance values adjacent to the primary specification. These parts offer increased current ratings of 3A, making them suitable for higher-power applications. The 782853301 and 782853331 remain within the WE-CBA series and maintain all compliance certifications.

Cross-Manufacturer Alternative (TDK Corporation):

The MPZ2012S331ATD25 (TDK MPZ series) provides a 330 Ohms @ 100 MHz ferrite bead with 2.5A current rating. This part maintains identical package dimensions, DC resistance, operating temperature range, and AEC-Q200 certification. The MPZ2012S331ATD25 is suitable for applications where TDK component qualification is required or where inventory availability of the primary manufacturer is constrained.

Selection Criteria:

• Select 78279220321 for direct impedance replacement with higher current capacity within the Würth Elektronik WE-MPSA series
• Select 782853301 or 782853331 for applications requiring 3A current handling with impedance tolerance in the 300–330 Ohms range
• Select MPZ2012S331ATD25 for cross-manufacturer compatibility or when TDK component specifications are mandated

All substitute parts maintain Active product status, AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 782853321 be directly replaced with 78279220321?

A: Yes. The 78279220321 provides an exact impedance match at 320 Ohms @ 100 MHz with identical DC resistance (50mOhm), operating temperature range (-55°C ~ 125°C), and AEC-Q200 certification. The primary difference is increased current rating (2.5A versus 2A), which is a beneficial upgrade for most applications.

Q: What is the difference between the 782853321 and 782853331?

A: The 782853331 has a slightly higher impedance specification (330 Ohms @ 100 MHz versus 320 Ohms @ 100 MHz) and increased current rating (3A versus 2A). Both parts share identical package dimensions, DC resistance, operating temperature range, and compliance certifications. The 782853331 is suitable for applications tolerating ±3% impedance variation and requiring higher current capacity.

Q: Is the MPZ2012S331ATD25 compatible with the 782853321?

A: The MPZ2012S331ATD25 is mechanically and electrically compatible. It maintains the 0805 (2012 Metric) package form factor, 50mOhm DC resistance, -55°C ~ 125°C operating temperature range, and AEC-Q200 certification. The impedance is 330 Ohms @ 100 MHz (versus 320 Ohms), and current rating is 2.5A. This part is suitable when cross-manufacturer qualification is required.

Q: Can I use the 782853301 (300 Ohms) as a substitute for the 782853321 (320 Ohms)?

A: The 782853301 is parametrically equivalent with a 300 Ohms @ 100 MHz impedance specification. It maintains identical package dimensions, DC resistance, operating temperature range, and AEC-Q200 certification. The impedance difference of 20 Ohms (6% variation) is within acceptable tolerance for general power line filtering applications. The 782853301 offers increased current capacity (3A versus 2A).

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: (1) Package / Case: 0805 (2012 Metric) surface mount form factor, (2) Impedance @ Frequency: 320 Ohms @ 100 MHz or adjacent values (300–330 Ohms), (3) DC Resistance (DCR): 50mOhm maximum, (4) Operating Temperature Range: -55°C ~ 125°C, (5) Ratings: AEC-Q200 compliance, (6) RoHS Status: ROHS3 Compliant, and (7) Filter Type: Power Line single-line configuration.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. All substitute parts listed (78279220321, 782853301, 782853331, and MPZ2012S331ATD25) carry AEC-Q200 automotive qualification, making them suitable for automotive and industrial applications requiring this certification level.

Q: What is the moisture sensitivity level for these ferrite beads?

A: All parts, including the main part 782853321 and all substitutes, have Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.

Q: Can I substitute based on current rating alone?

A: No. Current rating is a secondary parameter. Primary substitution criteria include package form factor, impedance specification, DC resistance, operating temperature range, and compliance certifications. Current rating variations are acceptable when the substitute meets or exceeds the application requirement, but impedance and package compatibility must be maintained.