1812-682J Equivalent & Substitute Parts

Part Overview

The 1812-682J is a 6.8 µH fixed unshielded inductor manufactured by API Delevan Inc., designed for surface mount applications in the 1812 (4532 Metric) package. This active product features a ferrite core with a current rating of 409 mA and a maximum DC resistance of 1.2Ohm, suitable for RF and general signal processing circuits. Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility are required due to component availability, inventory considerations, or design flexibility within specified tolerance ranges.

Substiute Parts

1812-682J

API Delevan Inc.In Stock: 8771812-682J Datasheet

Current PartRFQ

CM453232-6R8JL

Bourns Inc.In Stock: 5490CM453232-6R8JL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CM453232-6R8JL from Bourns Inc. qualifies as a suitable substitute for the 1812-682J based on the following critical parameters:

• Inductance Value: Both parts are rated at 6.8 µH with ±5% tolerance, ensuring electrical equivalence for inductance-dependent circuits.
• Package Compatibility: Both use the 1812 (4532 Metric) surface mount package with identical physical dimensions (0.177" L x 0.126" W, 4.50mm x 3.20mm).
• DC Resistance: Both specify a maximum DC resistance of 1.2Ohm, maintaining equivalent power dissipation characteristics.
• Core Material: Both utilize ferrite cores with unshielded construction.
• Frequency Response: Both demonstrate equivalent Q-factor performance and self-resonant frequency in the target RF frequency band.

The primary difference is in current rating capacity. The CM453232-6R8JL supports 285 mA, compared to 409 mA for the 1812-682J. This parameter must be evaluated against specific circuit current requirements to ensure adequate safety margin.

Parameter Comparison

Engineering Selection Recommendations

Both the 1812-682J and CM453232-6R8JL are active products with established supply availability. The CM453232-6R8JL provides the advantage of ROHS3 compliance, suitable for applications subject to RoHS environmental regulations. The 1812-682J extends the minimum operating temperature to -55°C, providing broader temperature coverage for systems requiring low-temperature operation. Selection between these parts should prioritize current rating requirements and compliance obligations specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the CM453232-6R8JL directly replace the 1812-682J in existing designs? A: Direct mechanical and electrical substitution is possible when circuit current requirements do not exceed 285 mA. PCB layouts and component mounting remain identical due to package compatibility. Thermal design must account for the reduced current rating.

Q: What is the significance of the inductance tolerance ±5%? A: Both parts are specified with ±5% tolerance, ensuring predictable inductance values within this range. Circuit designs must account for this tolerance band in frequency response and impedance calculations.

Q: Are the operating temperature ranges compatible? A: The CM453232-6R8JL operates from -40°C to 125°C, while the 1812-682J operates from -55°C to 125°C. Applications requiring temperatures below -40°C require the 1812-682J.

Q: What is the impact of DC resistance differences? A: Both parts specify identical maximum DC resistance of 1.2Ohm, ensuring equivalent power dissipation and impedance characteristics.

Q: Does the unshielded construction affect circuit performance? A: Both parts utilize unshielded ferrite core construction. Electromagnetic field coupling to surrounding circuits remains equivalent for both substitutes.

Q: What does RoHS3 compliance signify for the CM453232-6R8JL? A: ROHS3 compliance certifies the component meets European Union Restriction of Hazardous Substances regulations, restricting specific materials in electronic products.