VLF3012AT-220MR33 Equivalent & Substitute Parts

Part Overview

The VLF3012AT-220MR33 is a 22 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 330 mA maximum current with 760 mOhm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across the temperature range of -40°C to 105°C and is suitable for surface mount applications in compact form factors.

Substiute Parts

VLF3012AT-220MR33

TDK CorporationIn Stock: 1522VLF3012AT-220MR33 Datasheet

Current PartRFQ

VLS3012HBX-220M

TDK CorporationIn Stock: 5004VLS3012HBX-220M Datasheet

MFR RecommendedRFQ

SRU2011-220Y

Bourns Inc.In Stock: 838SRU2011-220Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VLF3012AT-220MR33 are qualified based on the following electrical and mechanical parameters:

• Inductance Value: 22 µH (exact match required)
• Current Rating: Minimum 330 mA to support original circuit requirements
• DC Resistance: Within acceptable range for power loss characteristics
• Core Type: Ferrite or metal core acceptable for shielded drum core construction
• Shielding: Shielded configuration required
• Mounting: Surface mount technology
• Temperature Range: Minimum -40°C to 105°C coverage
• Package Footprint: Nonstandard drum core geometry with compatible height (1.20mm seated)

Two active substitute parts meet these criteria: VLS3012HBX-220M (TDK Corporation) and SRU2011-220Y (Bourns Inc.).

Parameter Comparison

Engineering Selection Recommendations

VLS3012HBX-220M (TDK Corporation) is the primary substitute option. This part maintains TDK Corporation manufacturing continuity and is actively produced. It provides superior current handling capability (1.12 A versus 330 mA), enabling use in higher-current applications while maintaining the same inductance value and DC resistance specification. The metal core construction and 1 MHz test frequency indicate optimized performance characteristics for modern switching applications. ROHS3 compliance and active product status ensure long-term availability and regulatory alignment.

SRU2011-220Y (Bourns Inc.) is a secondary substitute option suitable for direct replacement in applications requiring exact current rating matching (330 mA). This part maintains ferrite core construction identical to the original VLF3012AT-220MR33 and provides an extended operating temperature range to 125°C. The higher DC resistance (1.58 Ohm) and lower saturation current (270 mA) require circuit-level verification before implementation. ROHS3 compliance and active production status support procurement continuity.

Both substitutes meet the core electrical and mechanical requirements. Selection depends on circuit current demands and thermal performance requirements.

Frequently Asked Questions (FAQ)

Q: Can VLS3012HBX-220M replace VLF3012AT-220MR33 in all applications?

A: VLS3012HBX-220M meets the inductance, shielding, and temperature range requirements. The higher current rating (1.12 A) and metal core construction support the original 330 mA specification. Footprint dimensions increase slightly (3.00mm x 3.00mm versus 2.80mm x 2.60mm), requiring PCB layout verification. The part is electrically compatible for direct substitution in space-constrained designs.

Q: What are the differences between ferrite and metal core construction?

A: The original VLF3012AT-220MR33 uses ferrite core material. VLS3012HBX-220M employs metal core construction, which typically provides improved current handling and frequency response characteristics. SRU2011-220Y maintains ferrite core construction. Both core types are acceptable for shielded drum core wirewound inductors at the specified inductance value.

Q: Does the higher DC resistance of SRU2011-220Y affect circuit performance?

A: SRU2011-220Y exhibits 1.58 Ohm maximum DC resistance compared to 760 mOhm for the original part. This 2x increase in resistance will increase power dissipation in the inductor. Circuit-level thermal and efficiency analysis is required before selecting this substitute in power-sensitive applications.

Q: Are both substitutes available in the same packaging format?

A: VLS3012HBX-220M is supplied in Cut Tape (CT) and Digi-Reel packaging. SRU2011-220Y is supplied in Tape & Reel (TR) format. Both are surface mount nonstandard drum core packages with 1.20mm seated height, compatible with standard pick-and-place assembly equipment.

Q: What is the significance of the inductance test frequency difference?

A: VLF3012AT-220MR33 and SRU2011-220Y are tested at 100 kHz, while VLS3012HBX-220M is tested at 1 MHz. The inductance value remains 22 µH across all test frequencies for these parts. The higher test frequency for VLS3012HBX-220M reflects optimization for modern high-frequency switching applications.