SM1206AC Equivalent & Substitute Parts Reference

Part Overview

The SM1206AC is an amber LED indication component manufactured by Bivar Inc., designed for surface mount applications in the 1206 (3216 Metric) package format. This discrete LED operates at a forward voltage of 2V with a test current of 20mA and provides amber light output at 607nm dominant wavelength. The component is Active in product status and RoHS3 compliant, making it suitable for current production designs. Substitute parts are identified when equivalent functional performance is required due to inventory constraints, design revisions, or supply chain considerations while maintaining compatibility with the target application parameters.

Substiute Parts

SM1206AC

Bivar Inc.In Stock: 1120SM1206AC Datasheet

Current PartRFQ

LTST-C190AKT

Lite-On Inc.In Stock: 3301LTST-C190AKT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM1206AC is evaluated based on the following critical parameters that define functional equivalence:

Optical Characteristics: Color (Amber), dominant wavelength range (607nm), and lens transparency (Clear) establish the visual output specification. The millicandela rating (6mcd) and viewing angle (140°) define the light intensity and distribution pattern.

Electrical Characteristics: Forward voltage (2V typical) and test current (20mA) are primary design parameters that determine circuit compatibility and current-limiting resistor selection.

Mechanical Compatibility: Package format (1206/3216 Metric), mounting type (Surface Mount), lens style (Rectangle with Flat Top), and physical dimensions (3.20 x 1.60mm, height 1.10mm max) ensure PCB layout and assembly process compatibility.

Regulatory Compliance: RoHS3 compliance and Active product status confirm suitability for current production environments.

The identified substitute part LTST-C190AKT from Lite-On Inc. presents a different package format (0603/1608 Metric) and differs in color (Orange vs. Amber), wavelength (602nm vs. 607nm), and electrical parameters (2.1V vs. 2V, 10mA vs. 20mA test current). These differences indicate that LTST-C190AKT is not a direct functional equivalent for the SM1206AC and would require circuit redesign and PCB layout modification for implementation.

Parameter Comparison

Engineering Selection Recommendations

SM1206AC Selection Criteria: The SM1206AC remains the primary component choice when the design specification explicitly requires a 1206 (3216 Metric) package format with amber color output at 607nm wavelength, 2V forward voltage, and 6mcd brightness rating. This component is Active in product status and RoHS3 compliant, confirming availability for current production designs.

LTST-C190AKT Consideration: The LTST-C190AKT from Lite-On Inc. is not a direct substitute for the SM1206AC due to fundamental differences in package size (0603 vs. 1206), color (Orange vs. Amber), wavelength (602nm vs. 607nm), forward voltage (2.1V vs. 2V), and brightness (2mcd vs. 6mcd). Implementation of LTST-C190AKT would require complete circuit redesign, PCB layout modification, and verification of optical and electrical performance against the original application requirements. Both components maintain RoHS3 compliance and Active product status.

Compliance Basis: Selection between these components must be based on explicit design parameter requirements rather than general substitution assumptions. The provided parameter data confirms both components are RoHS3 compliant and Active, but their technical specifications diverge significantly across multiple critical dimensions.

Frequently Asked Questions (FAQ)

Q: Can LTST-C190AKT be used as a direct replacement for SM1206AC?

A: No. LTST-C190AKT differs from SM1206AC in package format (0603 vs. 1206), color (Orange vs. Amber), wavelength (602nm vs. 607nm), forward voltage (2.1V vs. 2V), and brightness (2mcd vs. 6mcd). Direct substitution is not possible without circuit and PCB redesign.

Q: What are the key parameters that determine LED substitution compatibility?

A: Package format, color, dominant wavelength, forward voltage, test current, brightness rating (millicandela), viewing angle, and physical dimensions are the primary parameters. Changes in any of these parameters require design verification.

Q: Are both SM1206AC and LTST-C190AKT suitable for new production designs?

A: Yes. Both components are Active in product status and RoHS3 compliant. However, they are not interchangeable; each is suitable only for designs that explicitly specify its particular parameters.

Q: What is the significance of the package size difference between 1206 and 0603?

A: Package size determines PCB footprint, assembly process compatibility, and physical placement constraints. A 0603 package is significantly smaller than 1206 and requires different PCB layout and pick-and-place equipment settings. Substitution between these packages requires complete PCB redesign.

Q: How do the forward voltage differences affect circuit design?

A: Forward voltage (Vf) determines the voltage drop across the LED and affects current-limiting resistor selection. SM1206AC operates at 2.0V while LTST-C190AKT operates at 2.1V. This 0.1V difference requires recalculation of series resistor values to maintain proper current limiting and brightness.

Q: What does the millicandela rating indicate?

A: Millicandela (mcd) measures luminous intensity in a specific direction. SM1206AC provides 6mcd while LTST-C190AKT provides 2mcd. This represents a significant brightness difference that affects visibility and application suitability.

Q: Are there any inventory considerations for these parts?

A: SM1206AC has 1053 pieces in stock (Tape & Reel packaging). LTST-C190AKT has 3200 pieces in stock (Cut Tape & Digi-Reel packaging). Inventory availability should be verified against project timeline requirements.