Würth Elektronik 784775012 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 784775012 is a 1.2 µH unshielded drum core wirewound inductor rated for 6.18 A continuous current with a maximum DC resistance of 6mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part carries AEC-Q200 automotive qualification and operates across the -40°C to 125°C temperature range.

Substiute Parts

784775012

Würth ElektronikIn Stock: 982784775012 Datasheet

Current PartRFQ

VLM10555T-1R2M100-3H

TDK CorporationIn Stock: 1098VLM10555T-1R2M100-3H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Würth Elektronik 784775012 is determined by the following critical parameters:

• Inductance Value: 1.2 µH (±20% tolerance maintained)
• Current Rating: Minimum 6.18 A continuous current capability
• DC Resistance: Maximum 6 mOhm to preserve circuit performance
• Core Material: Ferrite drum core construction
• Mounting Type: Surface mount configuration
• Temperature Range: -40°C to 125°C operation
• Compliance: AEC-Q200 automotive qualification and ROHS3 compliance

The TDK Corporation VLM10555T-1R2M100-3H meets these substitution criteria with equivalent inductance, superior current rating (10 A), lower DC resistance (3.2 mOhm), and active product status. Both components utilize ferrite drum core construction with identical inductance tolerance and operating temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

The TDK Corporation VLM10555T-1R2M100-3H is the qualified substitute for the obsolete Würth Elektronik 784775012. Selection is supported by:

• Compliance Alignment: Both components maintain AEC-Q200 automotive qualification and ROHS3 compliance
• Active Product Status: The TDK part is actively manufactured, ensuring supply chain continuity
• Electrical Performance: The substitute provides superior current handling (10 A vs. 6.18 A) and reduced DC resistance (3.2 mOhm vs. 6 mOhm), delivering improved thermal performance and lower power dissipation
• Functional Equivalence: Identical inductance value and tolerance with matching operating temperature range
• Enhanced Saturation Margin: Higher saturation current (18 A vs. 8 A) provides additional design margin

Physical dimensions differ between the two components (TDK: 10.60 mm L × 10.50 mm W vs. Würth: 7.80 mm L × 7.00 mm W), requiring PCB layout verification during substitution.

Frequently Asked Questions (FAQ)

Q: Can the TDK VLM10555T-1R2M100-3H directly replace the Würth Elektronik 784775012 in existing designs?

A: Electrical substitution is valid based on matching inductance, tolerance, and operating temperature. However, physical dimensions differ, requiring PCB footprint verification. The TDK component is larger (10.60 mm × 10.50 mm vs. 7.80 mm × 7.00 mm), necessitating layout assessment before implementation.

Q: What are the key differences between these two inductors?

A: The primary differences are product status (obsolete vs. active), shielding (unshielded vs. shielded), DC resistance (6 mOhm vs. 3.2 mOhm), and current ratings (6.18 A vs. 10 A). The TDK substitute offers superior electrical performance with lower losses and higher current capacity.

Q: Does the shielding difference affect substitution compatibility?

A: The TDK part includes shielding while the original is unshielded. Shielding reduces electromagnetic interference emission and susceptibility. This represents an improvement for most applications but requires verification in noise-sensitive circuits.

Q: Are both components qualified for automotive applications?

A: Yes, both components carry AEC-Q200 automotive qualification and ROHS3 compliance, meeting automotive industry standards.

Q: What is the packaging difference between these parts?

A: The Würth part is supplied in standard tape and reel format. The TDK substitute is also supplied in tape and reel (TR) packaging, maintaining manufacturing compatibility.