SM1206UYC-IL Yellow LED 1206 SMD Equivalent & Substitute Parts

Part Overview

The SM1206UYC-IL is a yellow 592nm LED indication component manufactured by Bivar Inc. in 1206 (3216 Metric) surface mount package format. This discrete LED operates at 2.1V forward voltage with a 270mcd brightness rating and 30° viewing angle, designed for standard indication applications requiring clear lens yellow light emission.

The SM1206UYC-IL maintains Active product status with full RoHS3 compliance and current inventory availability. Substitute parts are identified for applications requiring alternative brightness levels, viewing angles, or forward voltage characteristics while maintaining the same 1206 package footprint and yellow wavelength specification.

Substiute Parts

SM1206UYC-IL

Bivar Inc.In Stock: 964SM1206UYC-IL Datasheet

Current PartRFQ

QTLP650C3TR

onsemiIn Stock: 692QTLP650C3TR Datasheet

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XZM2ACY55W-1

SunLEDIn Stock: 1749XZM2ACY55W-1 Datasheet

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XZMYK55W-1

SunLEDIn Stock: 2784XZMYK55W-1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM1206UYC-IL are qualified based on the following criteria:

Package Compatibility: All substitute parts maintain the 1206 (3216 Metric) surface mount package with identical footprint dimensions (3.20mm L x 1.60mm W), ensuring direct PCB layout compatibility.

Electrical Compatibility: Substitute parts operate within the same forward voltage range (2.0V to 2.1V) and test current specification (20mA), allowing operation from identical drive circuits without modification.

Optical Characteristics: All substitute parts emit yellow light in the 590nm to 593nm dominant wavelength range, maintaining color consistency for indication applications.

Mounting and Assembly: All substitute parts use surface mount technology with identical package designation, compatible with standard SMD assembly processes.

The following substitute parts meet these criteria:

1. QTLP650C3TR (onsemi) - Obsolete status, lower brightness (10mcd), wider viewing angle (140°)
2. XZM2ACY55W-1 (SunLED) - Active status, higher brightness (347mcd), wider viewing angle (120°), lower profile (0.75mm)
3. XZMYK55W-1 (SunLED) - Active status, moderate brightness (148mcd), wider viewing angle (120°), lower profile (0.75mm)

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - XZM2ACY55W-1 or XZMYK55W-1 (SunLED):

Both SunLED alternatives maintain Active product status with full RoHS3 compliance, matching the regulatory requirements of the SM1206UYC-IL. The XZM2ACY55W-1 provides higher brightness (347mcd) suitable for applications requiring increased visibility, while the XZMYK55W-1 offers moderate brightness (148mcd) for standard indication use. Both feature reduced height (0.75mm versus 1.40mm), enabling lower-profile PCB designs. The 120° viewing angle provides wider light distribution compared to the 30° specification of the original part. Forward voltage reduction from 2.1V to 2.0V results in lower power consumption at identical 20mA test current.

Secondary Selection - QTLP650C3TR (onsemi):

The QTLP650C3TR is classified as Obsolete and should be selected only when existing inventory constraints or legacy design requirements necessitate its use. The significantly lower brightness rating (10mcd) limits application to low-visibility indication scenarios. The 140° viewing angle provides maximum light distribution. This part is not recommended for new designs due to obsolete status.

Compliance Considerations:

The SM1206UYC-IL and both active SunLED substitutes (XZM2ACY55W-1, XZMYK55W-1) maintain ROHS3 compliance. The onsemi QTLP650C3TR does not specify RoHS status and should not be used in applications requiring RoHS certification.

Moisture Sensitivity:

The SM1206UYC-IL specifies MSL 4 (72 Hours). The SunLED alternatives specify MSL 3 (168 Hours), providing improved moisture tolerance. The onsemi part specifies MSL 1 (Unlimited), offering superior moisture resistance.

Frequently Asked Questions (FAQ)

Q: Can XZM2ACY55W-1 or XZMYK55W-1 be used as direct replacements for SM1206UYC-IL without circuit modification?

A: Yes. Both SunLED parts operate at 2.0V forward voltage compared to the SM1206UYC-IL's 2.1V, and both maintain the 20mA test current specification. This 0.1V difference is within typical LED forward voltage tolerance and does not require circuit redesign. The identical 1206 package footprint ensures direct PCB compatibility.

Q: What is the primary difference between XZM2ACY55W-1 and XZMYK55W-1?

A: The primary difference is brightness rating. The XZM2ACY55W-1 provides 347mcd while the XZMYK55W-1 provides 148mcd. Both share identical forward voltage (2.0V), viewing angle (120°), package dimensions, and compliance certifications. Selection depends on required brightness for the specific indication application.

Q: Why does the SM1206UYC-IL have a narrower viewing angle (30°) compared to substitute parts (120° to 140°)?

A: Viewing angle is determined by lens style and size. The SM1206UYC-IL uses a round lens (1.10mm diameter) which concentrates light in a narrow cone, while substitute parts use rectangular lenses (1.90mm to 2.00mm) that distribute light across a wider angle. This is a design trade-off between brightness concentration and light distribution.

Q: Is the QTLP650C3TR suitable for new product designs?

A: No. The QTLP650C3TR carries Obsolete product status, indicating discontinued manufacturing and limited future availability. New designs should use active parts: XZM2ACY55W-1 or XZMYK55W-1 from SunLED, which maintain full production support and current inventory.

Q: How does the reduced height of SunLED parts (0.75mm) affect PCB design compared to the SM1206UYC-IL (1.40mm)?

A: The 0.65mm height reduction enables lower-profile PCB assemblies and may improve clearance in space-constrained applications. The identical 1206 footprint (3.20mm L x 1.60mm W) ensures no PCB layout changes are required. Component placement and reflow soldering processes remain unchanged.

Q: What compliance certifications apply to substitute parts?

A: The XZM2ACY55W-1 and XZMYK55W-1 maintain ROHS3 compliance matching the SM1206UYC-IL. Both are REACH Unaffected. The QTLP650C3TR does not specify RoHS status and should not be used in applications requiring RoHS certification.

Q: Can forward voltage differences affect circuit performance?

A: The 0.1V difference between SM1206UYC-IL (2.1V) and SunLED substitutes (2.0V) falls within standard LED forward voltage tolerance ranges and does not require circuit modification. Current-limiting resistor values calculated for 2.1V operation remain valid for 2.0V operation with negligible impact on brightness or reliability.