SM1206SRC LED Red 1206 SMD - Equivalent & Substitute Parts

Part Overview

The SM1206SRC is an active red LED indication component manufactured by Bivar Inc. in the 1206 (3216 Metric) surface mount package. This part delivers a dominant wavelength of 640nm with 28mcd luminous intensity, forward voltage of 1.85V at 20mA test current, and 140° viewing angle. The component is ROHS3 compliant and available in tape and reel packaging with 978 units in stock.

Equivalent and substitute parts become necessary when the primary manufacturer's inventory is depleted, when alternate suppliers offer better lead times or pricing, or when design requirements allow for compatible alternatives with acceptable parameter variations within the 1206 SMD red LED category.

Substiute Parts

SM1206SRC

Bivar Inc.In Stock: 1000SM1206SRC Datasheet

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APT3216EC

KingbrightIn Stock: 56403APT3216EC Datasheet

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APT3216SURCK

KingbrightIn Stock: 2721APT3216SURCK Datasheet

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LTST-C150EKT

Lite-On Inc.In Stock: 1982LTST-C150EKT Datasheet

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SML-LX1206IC-TR

Lumex Opto/Components Inc.In Stock: 50945SML-LX1206IC-TR Datasheet

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SML-LX1206SRC-TR

Lumex Opto/Components Inc.In Stock: 3620SML-LX1206SRC-TR Datasheet

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SML-LXF1206SRC-TR

Lumex Opto/Components Inc.In Stock: 2779SML-LXF1206SRC-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM1206SRC is determined by the following required parameters:

1. Package Compatibility: All substitute parts must conform to 1206 (3216 Metric) surface mount package specification
2. Optical Properties: Color must be red; lens transparency must be clear
3. Electrical Parameters: Forward voltage (Vf) tolerance of ±0.3V from 1.85V (acceptable range: 1.55V to 2.15V); test current of 20mA
4. Mechanical Fit: Maximum height of 1.10mm; lateral dimensions 3.20mm L x 1.60mm W
5. Regulatory Compliance: ROHS3 compliance required

The substitute parts listed below meet these core compatibility criteria. Secondary parameters such as millicandela rating, viewing angle, and dominant wavelength may vary within acceptable ranges for red LED indication applications, as these parameters do not prevent physical or electrical integration into existing designs.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products in ROHS3 compliance status, meeting regulatory requirements equivalent to the SM1206SRC. The following considerations apply for component selection:

APT3216EC (Kingbright): This substitute operates at 2.0V forward voltage with reduced millicandela rating (8mcd) compared to the SM1206SRC. Height is reduced to 0.75mm with Moisture Sensitivity Level (MSL) of 3. Suitable for applications where reduced brightness is acceptable and lower profile is advantageous.

APT3216SURCK (Kingbright): This substitute operates at 1.95V forward voltage with increased millicandela rating (80mcd). Height is reduced to 0.75mm with MSL 3. Suitable for applications requiring higher brightness output with lower profile constraint compatibility.

LTST-C150EKT (Lite-On Inc.): This substitute operates at 2.0V forward voltage with minimal brightness (6mcd). Test current is 10mA rather than 20mA. Height matches at 1.10mm with MSL 3. Suitable where lower current draw is required.

SML-LX1206IC-TR (Lumex Opto/Components Inc.): This substitute operates at 2.0V forward voltage with reduced brightness (9mcd). Lens size is 2.00mm x 1.50mm with height 1.10mm and MSL 3. Suitable where minor lens dimension variation is acceptable.

SML-LX1206SRC-TR (Lumex Opto/Components Inc.): This substitute operates at 1.7V forward voltage with brightness comparable to SM1206SRC (25mcd). Viewing angle matches at 140°. Height 1.10mm and MSL 3. Optimal compatibility with minimal parameter deviation.

SML-LXF1206SRC-TR (Lumex Opto/Components Inc.): This substitute operates at 1.7V forward voltage with higher brightness (70mcd). Lens size is 1.90mm x 1.60mm with height 1.10mm and MSL 3. Suitable where increased brightness is required with minor lens width reduction.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts be directly swapped into a design using SM1206SRC? A: All listed parts are mechanically compatible with 1206 package footprints. Electrical compatibility depends on forward voltage tolerance in the circuit design. Parts operating at 1.7V or 1.95V forward voltage are electrically nearest to the SM1206SRC at 1.85V. Parts at 2.0V forward voltage require verification that the power supply and current limiting resistor accommodate the voltage difference.

Q: What is the significance of the different test currents (10mA vs 20mA)? A: Test current defines the operational point at which the electrical and optical characteristics are specified. LTST-C150EKT is specified at 10mA while others are specified at 20mA. When operated at different currents than specified, brightness and forward voltage may vary. Design current values should match the specified test current where possible.

Q: Are there height limitations I should consider? A: SM1206SRC and most substitutes have a maximum height of 1.10mm. APT3216EC and APT3216SURCK are reduced height at 0.75mm. If the PCB design includes clearance constraints or adjacent components, the reduced-height variants may provide additional board design flexibility. Conversely, if mechanical support structures rely on the full 1.10mm height, the reduced variants require design review.

Q: What does MSL (Moisture Sensitivity Level) mean for my supply chain? A: Moisture Sensitivity Level indicates component susceptibility to moisture during storage and handling. SM1206SRC has MSL 4 (72-hour floor life); substitute parts have MSL 3 (168-hour floor life). MSL 3 provides extended handling time after moisture exposure, offering less restrictive storage and assembly requirements.

Q: Which substitute offers the closest electrical match to SM1206SRC? A: SML-LX1206SRC-TR offers the closest match with 1.7V forward voltage compared to SM1206SRC at 1.85V (0.15V difference). This part also matches the 140° viewing angle and operates at the same 20mA test current. Brightness (25mcd) is comparable to the original specification (28mcd).

Q: Can I use a higher brightness substitute if my application only needs indication? A: Yes. APT3216SURCK (80mcd) and SML-LXF1206SRC-TR (70mcd) provide increased brightness. The limiting factor is circuit current-limiting design. Verify that the series resistor and power supply are dimensioned to handle the substitute's electrical characteristics. Higher brightness does not require design changes beyond standard component selection practices.

Q: Are all substitutes available in the same packaging format? A: No. SM1206SRC and most Lumex substitutes are supplied in Tape & Reel (TR) format. LTST-C150EKT is supplied in Cut Tape (CT) & Digi-Reel® format. Verify packaging compatibility with your assembly process. Both formats are suitable for automated pick-and-place assembly with appropriate feeder configurations.