AISC-1812H-3R3N-T Equivalent & Substitute Parts

Part Overview

The AISC-1812H-3R3N-T is a 3.3 µH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 800 mA with a maximum DC resistance of 130mOhm. This component is designed for surface mount applications in the 1812 (4532 Metric) package format. The part is currently obsolete, necessitating identification of functionally equivalent alternatives to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

AISC-1812H-3R3N-T

Abracon LLCIn Stock: 932AISC-1812H-3R3N-T Datasheet

Current PartRFQ

LQH43CN3R3M03L

Murata ElectronicsIn Stock: 20380LQH43CN3R3M03L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AISC-1812H-3R3N-T is determined by strict equivalence across the following critical parameters:

• Inductance Value: 3.3 µH (exact match required)
• Current Rating: 800 mA minimum
• DC Resistance: 130mOhm maximum
• Core Material & Type: Ferrite drum core wirewound construction
• Shielding Configuration: Unshielded
• Package Format: 1812 (4532 Metric) surface mount
• Self Resonant Frequency: 47 MHz
• Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm), Height 0.110" (2.80mm) maximum

The substitute part LQH43CN3R3M03L from Murata Electronics meets all these electrical and mechanical specifications, with the exception of inductance tolerance (±20% versus ±30%) and extended lower operating temperature (-40°C versus -25°C), both of which represent equal or superior performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LQH43CN3R3M03L from Murata Electronics is a direct functional equivalent to the AISC-1812H-3R3N-T. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The Murata substitute offers tighter inductance tolerance (±20% versus ±30%) and an extended lower operating temperature range (-40°C versus -25°C), providing equal or superior performance in standard applications.

Selection between these parts should be based on component availability and supply chain considerations, as both the original Abracon part and the Murata substitute are no longer in active production. The Murata LQH43CN3R3M03L currently maintains higher inventory availability (20,300 pcs) compared to the Abracon original (823 pcs).

Frequently Asked Questions (FAQ)

Q: Can the LQH43CN3R3M03L be used as a direct replacement for the AISC-1812H-3R3N-T?

A: Yes. Both inductors share identical electrical specifications (3.3 µH, 800 mA, 130mOhm DCR), core construction (ferrite drum core wirewound), and physical package dimensions (1812 / 4532 Metric). The Murata part meets or exceeds all performance parameters of the original Abracon component.

Q: What is the difference in inductance tolerance between these parts?

A: The AISC-1812H-3R3N-T has ±30% tolerance, while the LQH43CN3R3M03L has ±20% tolerance. The tighter tolerance of the Murata part provides greater inductance value consistency across production batches.

Q: Are there any temperature range limitations when substituting?

A: The Murata LQH43CN3R3M03L operates from -40°C to 85°C, compared to the Abracon part's -25°C to 85°C range. This represents an extended lower temperature capability and poses no limitation for standard industrial applications.

Q: Do both parts use the same packaging format?

A: Yes. Both the AISC-1812H-3R3N-T and LQH43CN3R3M03L use the 1812 (4532 Metric) surface mount package with identical physical dimensions (0.177" L x 0.126" W, 0.110" maximum height). They are mechanically interchangeable on PCB layouts.

Q: What is the self-resonant frequency specification?

A: Both inductors have a self-resonant frequency of 47 MHz, measured at 1 MHz inductance test frequency. This specification is identical across both parts.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the AISC-1812H-3R3N-T and LQH43CN3R3M03L are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic component manufacturing and use.