LH T674-L2N1-1-0-10-R18-Z Equivalent & Substitute Parts

Part Overview

The LH T674-L2N1-1-0-10-R18-Z is a red LED indication component manufactured by ams-OSRAM USA INC. in the TOPLED® series. This surface-mount device features a 2-PLCC package with a clear, round lens and operates at a forward voltage of 1.75V with a 10mA test current. The component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across optical, electrical, and mechanical parameters while meeting current supply chain availability requirements.

Substiute Parts

LH T674-L2N1-1-0-10-R18-Z

ams-OSRAM USA INC.In Stock: 1046LH T674-L2N1-1-0-10-R18-Z Datasheet

Current PartRFQ

SML-LX2832IC-TR

Lumex Opto/Components Inc.In Stock: 4827SML-LX2832IC-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LH T674-L2N1-1-0-10-R18-Z is determined by alignment across the following critical parameters:

Optical Compatibility: Red color, clear lens transparency, round lens style with flat top, and 120° viewing angle must be maintained.

Electrical Compatibility: Forward voltage (Vf) and test current must support operation within the original circuit design parameters. Millicandela rating must provide equivalent luminous intensity for indication applications.

Mechanical Compatibility: 2-PLCC package type, surface-mount configuration, 2.40mm lens diameter, and overall dimensions (3.20mm L x 2.80mm W x 2.10mm H max) must remain consistent.

Regulatory Compliance: ROHS3 compliance and EAR99 ECCN classification are required for equivalent substitution.

Wavelength Characteristics: Peak wavelength in the red spectrum (635nm–660nm range) ensures optical consistency for indication purposes.

The substitute part SML-LX2832IC-TR from Lumex Opto/Components Inc. meets these substitution criteria while maintaining active product status and current supply availability.

Parameter Comparison

Engineering Selection Recommendations

The SML-LX2832IC-TR qualifies as a direct substitute for the obsolete LH T674-L2N1-1-0-10-R18-Z based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active product status, ensuring long-term supply chain availability and manufacturing support compared to the obsolete main part.

Regulatory Compliance: Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Both carry EAR99 ECCN classification and identical HTSUS codes (8541.41.0000), confirming equivalent trade classification.

Optical and Mechanical Compatibility: Identical package type (2-PLCC), lens configuration (round with flat top, clear, colorless), lens diameter (2.40mm), overall dimensions (3.20mm L x 2.80mm W), and maximum height (2.10mm) ensure direct mechanical and optical interchangeability on printed circuit boards.

Electrical Performance: The substitute operates at 2V forward voltage with a 20mA test current, compared to the main part's 1.75V and 10mA. The millicandela ratings are equivalent (25mcd vs. 24.75mcd), confirming comparable luminous intensity for indication applications. Peak wavelength differs slightly (635nm vs. 660nm), remaining within the red spectrum range suitable for visual indication purposes.

Moisture Sensitivity: The substitute carries MSL 3 (168 Hours) compared to MSL 2 (1 Year) for the main part. This represents a more stringent moisture handling requirement during storage and assembly operations.

Selection of the SML-LX2832IC-TR is appropriate for applications requiring direct form-factor and functional replacement of the LH T674-L2N1-1-0-10-R18-Z, with circuit design review recommended to accommodate the 0.25V forward voltage increase and 10mA additional test current.

Frequently Asked Questions (FAQ)

Q: Can the SML-LX2832IC-TR be used as a direct drop-in replacement for the LH T674-L2N1-1-0-10-R18-Z?

A: The SML-LX2832IC-TR is mechanically and optically compatible as a direct replacement, sharing identical 2-PLCC package type, lens configuration, and physical dimensions. Electrical parameters differ: the substitute operates at 2V forward voltage and 20mA test current compared to 1.75V and 10mA for the main part. Circuit design review is required to confirm compatibility with existing current-limiting resistor values and power supply specifications.

Q: What are the key differences between these two parts?

A: Primary differences include product status (obsolete vs. active), forward voltage (1.75V vs. 2V), test current (10mA vs. 20mA), peak wavelength (660nm vs. 635nm), and moisture sensitivity level (MSL 2 vs. MSL 3). Optical output (millicandela rating) and mechanical form factor remain equivalent.

Q: Are both parts ROHS3 compliant?

A: Yes, both the LH T674-L2N1-1-0-10-R18-Z and SML-LX2832IC-TR are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: What does the MSL 3 (168 Hours) rating mean for the substitute part?

A: MSL 3 indicates the component must be used within 168 hours (7 days) of package opening under controlled humidity conditions (typically 30% relative humidity at 25°C). This is more restrictive than the main part's MSL 2 (1 Year) rating and requires stricter moisture control during storage and assembly operations.

Q: Do both parts use the same 2-PLCC package?

A: Yes, both components use the 2-PLCC package type with identical external dimensions (3.20mm L x 2.80mm W x 2.10mm H max) and 2.40mm diameter clear round lens with flat top. They are mechanically interchangeable on printed circuit boards.

Q: What is the viewing angle for both parts?

A: Both the LH T674-L2N1-1-0-10-R18-Z and SML-LX2832IC-TR provide a 120° viewing angle, ensuring equivalent light distribution characteristics for indication applications.

Q: How do the wavelength specifications compare?

A: The main part has a peak wavelength of 660nm, while the substitute has a peak wavelength of 635nm. Both fall within the red spectrum range suitable for visual indication. The dominant wavelength for the main part is 645nm. These differences may result in slightly different perceived color intensity but remain functionally equivalent for indication purposes.

Q: Is the substitute part currently available?

A: Yes, the SML-LX2832IC-TR maintains active product status with current manufacturing support, unlike the obsolete LH T674-L2N1-1-0-10-R18-Z. This ensures long-term supply chain availability for new designs and production requirements.