LT M673-P2R1-4-1-10-R18-Z Equivalent & Substitute Parts

Part Overview

The LT M673-P2R1-4-1-10-R18-Z is a green 532nm LED indication component manufactured by ams-OSRAM USA INC. in the Mini TOPLED® series. This surface mount device features a rectangular lens with flat top, rated at 98 millicandela with a 120° viewing angle. The component operates at a forward voltage of 3.05V with a 10mA test current and is housed in a 2-SMD J-Lead package measuring 2.00mm × 1.40mm.

The product status is listed as obsolete, necessitating identification of active equivalent components that maintain functional compatibility within the green LED indication category. Substitute parts must satisfy the core electrical parameters, mounting requirements, and compliance standards to ensure direct replacement capability in existing designs.

Substiute Parts

LT M673-P2R1-4-1-10-R18-Z

ams-OSRAM USA INC.In Stock: 825LT M673-P2R1-4-1-10-R18-Z Datasheet

Current PartRFQ

KT DELQS1.12-RGSH-36-N626-2-S

ams-OSRAM USA INC.In Stock: 1200KT DELQS1.12-RGSH-36-N626-2-S Datasheet

MFR RecommendedRFQ

KT DELQS1.12-TIVH-36-S446-10-S

ams-OSRAM USA INC.In Stock: 9792KT DELQS1.12-TIVH-36-S446-10-S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT M673-P2R1-4-1-10-R18-Z is determined by the following critical parameters:

Color and Wavelength Compatibility: All substitute parts must emit green light in the 531–532nm dominant wavelength range to maintain functional equivalence in indication applications.

Electrical Parameters: Forward voltage (Vf) and test current define circuit compatibility. The main part operates at 3.05V / 10mA. Substitute parts operate at lower forward voltages (2.65V and 2.8V) with varying test currents (2mA and 10mA), requiring circuit verification for voltage drop and current limiting resistor adjustments.

Optical Performance: Millicandela rating, viewing angle, and lens characteristics determine visibility and application suitability. The main part provides 98mcd at 120° viewing angle. Substitute parts offer higher brightness ratings (176mcd and 680mcd) with identical 120° viewing angles.

Mounting and Package: Surface mount technology is maintained across all parts. However, the main part uses a 2-SMD J-Lead package, while substitute parts use 2-SMD Flat Lead packages. Physical dimensions differ: main part is 2.00mm × 1.40mm with 1.40mm height; substitute parts are 1.40mm × 0.80mm with 0.70mm height. These dimensional differences may affect PCB layout compatibility.

Compliance and Status: All parts are ROHS3 compliant with MSL 2 (1 Year). Substitute parts are active products with automotive grade qualification (AEC-Q102) and REACH unaffected status, providing long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

KT DELQS1.12-RGSH-36-N626-2-S is an active substitute with automotive grade qualification and AEC-Q102 certification. This part operates at 2.65V with 2mA test current, providing 176mcd brightness. The lower forward voltage and reduced test current require circuit redesign for current limiting resistor values. The smaller physical footprint (1.40mm × 0.80mm, 0.70mm height) offers space advantages but demands PCB layout modification. This part is suitable for applications where reduced power consumption and compact form factor are acceptable trade-offs against circuit modification requirements.

KT DELQS1.12-TIVH-36-S446-10-S is an active substitute with automotive grade qualification and AEC-Q102 certification. This part operates at 2.8V with 10mA test current, maintaining the same test current as the main part while reducing forward voltage by 0.25V. The significantly higher brightness rating (680mcd) provides enhanced visibility. The smaller physical footprint (1.40mm × 0.80mm, 0.70mm height) requires PCB layout modification. This part is suitable for applications where brightness enhancement and maintained test current are prioritized, with circuit voltage adjustment required.

Both substitute parts are manufactured by ams-OSRAM USA INC., ensuring consistent quality and supply chain continuity. Both are ROHS3 compliant with identical MSL ratings. The automotive grade and AEC-Q102 qualification of both substitutes provide enhanced reliability documentation compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the KT DELQS1.12-RGSH-36-N626-2-S and KT DELQS1.12-TIVH-36-S446-10-S be used interchangeably with the LT M673-P2R1-4-1-10-R18-Z?

A: Both parts are functionally equivalent in color and wavelength (green, 531nm dominant). However, they differ in forward voltage, test current, and brightness. Direct substitution requires circuit analysis to confirm voltage drop compatibility and current limiting resistor adjustment. The lower forward voltages (2.65V and 2.8V versus 3.05V) will affect circuit behavior. The different test currents (2mA and 10mA) require resistor recalculation.

Q: What are the package compatibility considerations?

A: The main part uses a 2-SMD J-Lead package measuring 2.00mm × 1.40mm with 1.40mm maximum height. Both substitute parts use 2-SMD Flat Lead packages measuring 1.40mm × 0.80mm with 0.70mm maximum height. These dimensional differences require PCB footprint modification. The smaller substitute parts offer reduced board space but demand layout redesign.

Q: How do the brightness ratings affect application suitability?

A: The main part provides 98mcd at 120° viewing angle. The KT DELQS1.12-RGSH-36-N626-2-S provides 176mcd (1.8× brighter), and the KT DELQS1.12-TIVH-36-S446-10-S provides 680mcd (6.9× brighter). Higher brightness may be advantageous for visibility in bright environments but may require optical design adjustment to prevent over-illumination in dimly lit applications.

Q: Are the substitute parts suitable for automotive applications?

A: Both substitute parts carry automotive grade designation and AEC-Q102 qualification, indicating compliance with automotive reliability standards. The main part does not carry automotive qualification. This makes the substitute parts suitable for automotive applications where such qualification is required.

Q: What is the impact of forward voltage differences on circuit design?

A: The main part operates at 3.05V typical forward voltage. The KT DELQS1.12-RGSH-36-N626-2-S operates at 2.65V (0.40V lower), and the KT DELQS1.12-TIVH-36-S446-10-S operates at 2.8V (0.25V lower). These differences affect the voltage drop across current limiting resistors. Circuit redesign is necessary to maintain proper LED current and brightness levels.

Q: Do all parts meet the same compliance standards?

A: All three parts are ROHS3 compliant with MSL 2 (1 Year) rating. Both substitute parts are REACH unaffected. The main part does not specify REACH status. All parts carry the same ECCN (EAR99) and HTSUS (8541.41.0000) classifications.

Q: What is the inventory status of these parts?

A: The main part (LT M673-P2R1-4-1-10-R18-Z) is obsolete with 787 pieces in stock. The KT DELQS1.12-RGSH-36-N626-2-S is active with 1115 pieces in stock. The KT DELQS1.12-TIVH-36-S446-10-S is active with 9775 pieces in stock. Active parts provide long-term supply chain availability.