AISC-1812H-471K-T Equivalent & Substitute Parts

Part Overview

The AISC-1812H-471K-T is a 470 µH unshielded drum core, wirewound inductor manufactured by Abracon LLC in a 1812 (4532 Metric) surface mount package. Designed for 90 mA applications with a maximum DC resistance of 12.5Ohm, this component is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

AISC-1812H-471K-T

Abracon LLCIn Stock: 1137AISC-1812H-471K-T Datasheet

Current PartRFQ

LQH43CN471K03L

Murata ElectronicsIn Stock: 8206LQH43CN471K03L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AISC-1812H-471K-T is determined by the following critical parameters:

• Inductance value: 470 µH (±10% tolerance acceptable)
• Current rating: 90 mA minimum
• Package / Case: 1812 (4532 Metric) surface mount
• Core type: Ferrite, unshielded drum core
• DC resistance: Must not exceed application requirements
• Self-resonant frequency: 3 MHz
• Environmental compliance: ROHS3 Compliant, MSL 1

The substitute part LQH43CN471K03L from Murata Electronics meets all critical electrical and mechanical parameters. While the DC resistance is lower (8.5Ohm Max versus 12.5Ohm Max), this represents an improvement in performance characteristics and does not compromise compatibility. Both parts share identical inductance, current rating, package dimensions, core material, and self-resonant frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

The LQH43CN471K03L from Murata Electronics is a direct substitute for the obsolete AISC-1812H-471K-T. Both components maintain ROHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility. The Murata part offers an extended operating temperature range (-40°C to 85°C versus -25°C to 85°C) and reduced DC resistance (8.5Ohm Max), which provides improved electrical performance without introducing compatibility issues. The identical package dimensions, inductance value, current rating, and self-resonant frequency ensure seamless integration into existing PCB layouts and circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the LQH43CN471K03L replace the AISC-1812H-471K-T in all applications?

A: Yes. Both inductors share identical inductance (470 µH), current rating (90 mA), package dimensions (1812 / 4532 Metric), core material (ferrite, unshielded), and self-resonant frequency (3 MHz). The lower DC resistance of the Murata part (8.5Ohm Max) represents an electrical improvement.

Q: What is the significance of the DC resistance difference?

A: The AISC-1812H-471K-T has a maximum DC resistance of 12.5Ohm, while the LQH43CN471K03L has 8.5Ohm Max. Lower DC resistance reduces power dissipation and heat generation in the inductor, improving overall circuit efficiency. This difference does not prevent substitution.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 1812 (4532 Metric) surface mount package with dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and a maximum seated height of 0.110" (2.80mm). PCB footprints are interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the AISC-1812H-471K-T and LQH43CN471K03L are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH unaffected status.

Q: What is the operating temperature range for each part?

A: The AISC-1812H-471K-T operates from -25°C to 85°C. The LQH43CN471K03L operates from -40°C to 85°C, providing a wider low-temperature operating range.