QTLP650C2TR Equivalent & Substitute Parts

Part Overview

The QTLP650C2TR is a red LED indicator in 1206 SMD package manufactured by onsemi, designed for discrete indication applications with 2V forward voltage and 20mA test current. This component is currently classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The part delivers 10mcd luminous intensity at 630nm dominant wavelength with a 140° viewing angle in a compact 3.20mm × 1.60mm surface mount form factor.

Key Parameters

Parameter	Value
Manufacturer Part Number	QTLP650C2TR
Manufacturer	onsemi
Product Status	Obsolete
Color	Red
Package / Case	1206 (3216 Metric)
Voltage - Forward (Vf) (Typ)	2V
Current - Test	20mA
Millicandela Rating	10mcd
Wavelength - Dominant	630nm
Wavelength - Peak	635nm
Viewing Angle	140°
Mounting Type	Surface Mount
Size / Dimension	3.20mm L × 1.60mm W
Height (Max)	1.30mm
Lens Style	Rectangle with Flat Top
Lens Color	Colorless
Lens Transparency	Clear
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the QTLP650C2TR is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Package / Case: 1206 (3216 Metric) surface mount form factor
Color: Red LED indication
Voltage - Forward (Vf): 2V nominal
Current - Test: 20mA
Mounting Type: Surface Mount
Lens Style: Rectangle with Flat Top
Lens Color: Colorless
Lens Transparency: Clear

Allowable Variation Parameters:

Millicandela Rating: ±1mcd tolerance acceptable for indication applications
Wavelength - Dominant: ±10nm tolerance acceptable
Wavelength - Peak: ±5nm tolerance acceptable
Viewing Angle: ±10° tolerance acceptable
Size / Dimension: ±0.10mm tolerance acceptable
Height (Max): ±0.20mm tolerance acceptable

The SML-LX1206IC-TR from Lumex Opto/Components Inc. qualifies as a direct substitute based on these parameters.

Parameter Comparison

Parameter	QTLP650C2TR (onsemi)	SML-LX1206IC-TR (Lumex)	Compatibility
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	Match
Color	Red	Red	Match
Voltage - Forward (Vf) (Typ)	2V	2V	Match
Current - Test	20mA	20mA	Match
Millicandela Rating	10mcd	9mcd	Compatible (−1mcd)
Wavelength - Dominant	630nm	—	Not specified for substitute
Wavelength - Peak	635nm	640nm	Compatible (+5nm)
Viewing Angle	140°	130°	Compatible (−10°)
Mounting Type	Surface Mount	Surface Mount	Match
Size / Dimension	3.20mm L × 1.60mm W	3.20mm L × 1.50mm W	Compatible (−0.10mm W)
Height (Max)	1.30mm	1.10mm	Compatible (−0.20mm)
Lens Style	Rectangle with Flat Top	Rectangle with Flat Top	Match
Lens Color	Colorless	Colorless	Match
Lens Transparency	Clear	Clear	Match
Product Status	Obsolete	Active	Substitute is active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	Substitute requires controlled storage
REACH Status	REACH Unaffected	REACH Unaffected	Match

Engineering Selection Recommendations

The SML-LX1206IC-TR qualifies as a direct substitute for the obsolete QTLP650C2TR based on electrical and mechanical parameter alignment. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

Compliance Considerations:

Both parts maintain REACH Unaffected status, confirming regulatory compliance for EU applications
Both parts carry EAR99 ECCN classification
Both parts share identical HTSUS commodity code 8541.41.0000

Storage and Handling: The SML-LX1206IC-TR carries MSL 3 (168 Hours) moisture sensitivity, compared to MSL 1 (Unlimited) for the original part. This requires implementation of controlled storage conditions and moisture-barrier packaging during inventory management and assembly operations.

Electrical Performance: The substitute part operates at identical forward voltage (2V) and test current (20mA), ensuring direct circuit compatibility. The 1mcd reduction in luminous intensity (9mcd vs. 10mcd) and 10° reduction in viewing angle (130° vs. 140°) remain within acceptable tolerance for indication applications.

Frequently Asked Questions (FAQ)

Q: Can the SML-LX1206IC-TR be used as a direct replacement in existing PCB designs?

A: Yes. The SML-LX1206IC-TR maintains identical package dimensions (1206), electrical characteristics (2V forward voltage, 20mA test current), and mounting type (surface mount). PCB footprints and circuit designs require no modification.

Q: What is the impact of the 1mcd difference in luminous intensity?

A: The SML-LX1206IC-TR delivers 9mcd compared to the original 10mcd. For indication applications, this 10% reduction remains within acceptable tolerance and does not affect functional visibility in standard operating environments.

Q: Why does the substitute part have a lower viewing angle specification?

A: The SML-LX1206IC-TR specifies 130° viewing angle versus 140° for the original part. This 10° reduction is within acceptable tolerance for indication applications and does not impact standard mounting orientations.

Q: What are the storage requirements for the SML-LX1206IC-TR?

A: The substitute part carries MSL 3 (168 Hours) classification, requiring storage in controlled humidity environments (typically ≤30% RH) and use within 168 hours of package opening. The original QTLP650C2TR carries MSL 1 (Unlimited), allowing indefinite storage without moisture control. Implement appropriate moisture-barrier packaging and desiccant storage for the substitute part.

Q: Are there any regulatory or compliance differences between the two parts?

A: Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications. No regulatory compliance differences exist for EU or US applications.

Q: What is the wavelength difference between the two parts?

A: The SML-LX1206IC-TR specifies 640nm peak wavelength compared to 635nm for the original part. This 5nm difference is within acceptable tolerance for red LED indication applications and produces no perceptible color shift in standard viewing conditions.

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