LH T674-M2P1-1-0-10-R18-Z Equivalent & Substitute Parts

Part Overview

The LH T674-M2P1-1-0-10-R18-Z is a red LED indication component manufactured by ams-OSRAM USA INC. in the TOPLED® series. This surface-mount 2-PLCC device operates at 1.75V forward voltage with a dominant wavelength of 645nm and peak wavelength of 660nm, delivering 39.2 millicandela at 10mA test current. The component features a clear, colorless round lens with flat top design and 120° viewing angle.

The product status is obsolete, necessitating identification of equivalent substitute components for ongoing design support, maintenance, and production continuity. Substitute parts must maintain functional compatibility across critical electrical and mechanical parameters while meeting the same environmental and regulatory compliance standards.

Substiute Parts

LH T674-M2P1-1-0-10-R18-Z

ams-OSRAM USA INC.In Stock: 954LH T674-M2P1-1-0-10-R18-Z Datasheet

Current PartRFQ

QTLP670C9TR

onsemiIn Stock: 867QTLP670C9TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LH T674-M2P1-1-0-10-R18-Z is determined by strict alignment of the following critical parameters:

Optical Characteristics: Color (Red), dominant wavelength (645nm), peak wavelength (660nm), lens color (colorless), lens transparency (clear), and lens style (round with flat top) must remain constant across substitute components.

Mechanical Compatibility: Package type (2-PLCC), lens size (2.40mm diameter), physical dimensions (3.20mm L x 2.80mm W), maximum height (2.10mm), and surface-mount mounting type ensure direct board-level compatibility.

Electrical Parameters: Forward voltage (Vf), test current, and millicandela rating determine functional performance in indication circuits. Substitute parts must operate within acceptable ranges for the intended application.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status are mandatory for substitution eligibility.

The QTLP670C9TR from onsemi qualifies as a parametric equivalent based on matching optical, mechanical, and regulatory requirements, with minor variations in electrical operating parameters within acceptable substitution tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: QTLP670C9TR (onsemi) is the qualified equivalent for LH T674-M2P1-1-0-10-R18-Z applications.

Compliance Basis: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent substitution in production and maintenance contexts.

Electrical Parameter Variations: The QTLP670C9TR operates at 1.9V forward voltage (versus 1.75V) and 20mA test current (versus 10mA). These variations remain within acceptable ranges for red LED indication circuits and do not preclude functional substitution. Circuit design must accommodate the higher forward voltage and test current specifications.

Optical and Mechanical Equivalence: Identical wavelength characteristics (645nm dominant, 660nm peak), lens configuration, physical dimensions, and 2-PLCC package ensure direct board-level compatibility without layout or assembly modifications.

Product Status Consideration: Both components carry obsolete product status. Long-term availability should be evaluated through component suppliers for production planning purposes.

Frequently Asked Questions (FAQ)

Q: Can QTLP670C9TR directly replace LH T674-M2P1-1-0-10-R18-Z in existing designs?

A: Yes. Both components share identical optical characteristics (645nm dominant wavelength, clear colorless lens), mechanical specifications (2-PLCC package, 3.20 x 2.80mm dimensions, 2.10mm height), and regulatory compliance (ROHS3, REACH unaffected). Direct substitution is supported at the board level without layout changes.

Q: What are the electrical differences between these components?

A: The QTLP670C9TR operates at 1.9V forward voltage compared to 1.75V for the LH T674-M2P1-1-0-10-R18-Z, representing a +0.15V variation. Test current is 20mA versus 10mA. These differences are within acceptable ranges for indication LED applications and do not prevent functional substitution.

Q: Are there any circuit design considerations for substitution?

A: Circuit current-limiting resistor values and power supply specifications should be evaluated to accommodate the QTLP670C9TR's higher forward voltage (1.9V) and test current (20mA). Existing designs operating at the original 10mA specification may require resistor adjustment to maintain equivalent brightness and power consumption profiles.

Q: Do both components have identical lens and optical properties?

A: Yes. Both the LH T674-M2P1-1-0-10-R18-Z and QTLP670C9TR feature identical lens color (colorless), transparency (clear), style (round with flat top), size (2.40mm diameter), and viewing angle (120°). Optical performance and appearance are equivalent.

Q: What is the moisture sensitivity level difference?

A: The LH T674-M2P1-1-0-10-R18-Z carries MSL 2 (1 Year), while the QTLP670C9TR carries MSL 1 (Unlimited). The QTLP670C9TR offers superior moisture resistance and longer shelf life without special storage requirements.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.

Q: What package type do these components use?

A: Both components use the 2-PLCC (Plastic Leaded Chip Carrier) surface-mount package with identical physical dimensions (3.20mm length x 2.80mm width, 2.10mm maximum height), ensuring direct compatibility with existing PCB footprints.