LTL-2R3VRKNT Equivalent & Substitute Parts

Part Overview

The LTL-2R3VRKNT is a red LED indicator from Lite-On Inc., featuring a 5mm T-1 3/4 through-hole package with 990mcd brightness at 631nm dominant wavelength. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates at 1.9V forward voltage with a 20mA test current and provides a 30° viewing angle in a standard round domed lens configuration.

Key Parameters

Parameter	Value
Manufacturer Part Number	LTL-2R3VRKNT
Manufacturer	Lite-On Inc.
Color	Red
Lens Size	5mm, T-1 3/4
Lens Style	Round with Domed Top
Lens Transparency	Clear
Voltage - Forward (Vf) Typical	1.9V
Current - Test	20mA
Millicandela Rating	990mcd
Wavelength - Dominant	631nm
Wavelength - Peak	639nm
Viewing Angle	30°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	8.70mm
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LTL-2R3VRKNT are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Lens size: 5mm, T-1 3/4 package
Mounting type: Through hole radial configuration
Color: Red
Lens style: Round with domed top, clear lens
Viewing angle: 30° (standard indication applications)
Current rating: 20mA test current
Moisture sensitivity: MSL 1 (Unlimited)

Acceptable Parameter Variations:

Forward voltage (Vf): 1.9V to 2.1V (within typical LED tolerance ranges for red indicators)
Millicandela rating: 990mcd to 8100mcd (brightness variations acceptable for indication applications)
Wavelength dominant: 624nm to 631nm (red spectrum range)
Height: 8.60mm to 10.30mm (within through-hole PCB assembly tolerances)

Substitutes are classified into two categories: direct equivalents (matching 1.9V forward voltage and 30° viewing angle) and functional alternatives (2.0V to 2.1V forward voltage with 30° viewing angle, suitable for applications with voltage regulation headroom).

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	RoHS Status
LTL-2R3VRKNT	Lite-On Inc.	1.9V	990mcd	631nm	30°	8.70mm	Obsolete	-
WP7143SURC/E	Kingbright	1.9V	1000mcd	630nm	30°	8.60mm	Active	ROHS3 Compliant
HLMP-EG08-VY000	Broadcom Limited	1.9V	8100mcd	626nm	8°	8.91mm	Active	ROHS3 Compliant
7343-2SURC/H2/S400-A6	Everlight Electronics Co Ltd	2V	1600mcd	624nm	30°	8.85mm	Active	ROHS3 Compliant
7343-2SURC/H2/S400-A7	Everlight Electronics Co Ltd	2V	1600mcd	624nm	30°	8.85mm	Active	ROHS3 Compliant
7343-2SURC/H2/S400-A8	Everlight Electronics Co Ltd	2V	2000mcd	624nm	30°	8.85mm	Active	ROHS3 Compliant
7343-2USRC/S1060	Everlight Electronics Co Ltd	2V	4000mcd	631nm	30°	8.85mm	Active	ROHS3 Compliant
7383/R7C3-ARUB/P/MS	Everlight Electronics Co Ltd	2V	7150mcd	624nm	30°	9.00mm	Active	ROHS3 Compliant
C503B-RCN-CW0Z0AA1	CreeLED, Inc.	2.1V	7500mcd	624nm	30°	10.30mm	Active	RoHS Compliant
383-2SDRC/S530-A4	Everlight Electronics Co Ltd	2V	2780mcd	639nm	6°	8.90mm	Active	-
383-2SURC/S530-A6	Everlight Electronics Co Ltd	2V	6300mcd	624nm	6°	8.90mm	Active	-

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

WP7143SURC/E from Kingbright is the closest direct equivalent to LTL-2R3VRKNT. It maintains identical forward voltage (1.9V), matching viewing angle (30°), and comparable brightness (1000mcd vs 990mcd). The part is active in production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

Primary Functional Alternatives (2.0V Forward Voltage Category):

The Everlight Electronics series 7343-2SURC/H2/S400-A6, 7343-2SURC/H2/S400-A7, and 7343-2SURC/H2/S400-A8 provide active production alternatives with 30° viewing angle matching. These parts operate at 2.0V forward voltage with brightness ratings from 1600mcd to 2000mcd. All three carry ROHS3 compliance. The 0.1V voltage increase is within standard LED tolerance ranges and suitable for circuits with adequate voltage headroom.

High-Brightness Alternatives (2.0V to 2.1V Forward Voltage Category):

For applications requiring increased brightness, 7343-2USRC/S1060 (4000mcd at 631nm), 7383/R7C3-ARUB/P/MS (7150mcd at 624nm), and C503B-RCN-CW0Z0AA1 (7500mcd at 624nm) maintain 30° viewing angle with active production status and compliance certifications. These parts accommodate higher brightness requirements while preserving through-hole package compatibility.

Narrow-Angle Alternatives (6° Viewing Angle):

Parts 383-2SDRC/S530-A4 and 383-2SURC/S530-A6 feature 6° viewing angle instead of 30°. These are suitable only for applications requiring concentrated light output and are not recommended as general-purpose replacements for standard indication applications.

Narrow-Angle High-Brightness Alternative (8° Viewing Angle):

HLMP-EG08-VY000 from Broadcom Limited provides 8100mcd brightness at 1.9V forward voltage with 8° viewing angle. This part is suitable only for applications requiring narrow-angle, high-intensity indication and is not recommended for standard 30° viewing angle applications.

Frequently Asked Questions (FAQ)

Q: Can I use WP7143SURC/E as a direct replacement for LTL-2R3VRKNT?

A: Yes. WP7143SURC/E matches the critical parameters: 1.9V forward voltage, 30° viewing angle, 5mm T-1 3/4 through-hole package, and clear red lens. Brightness difference (1000mcd vs 990mcd) is negligible for indication applications. The part is in active production with ROHS3 compliance.

Q: What is the difference between 1.9V and 2.0V forward voltage substitutes?

A: The 0.1V difference represents a typical tolerance variation in red LED manufacturing. Circuits designed for 1.9V operation can accommodate 2.0V parts if the power supply provides adequate voltage headroom. For battery-powered applications or circuits with tight voltage margins, verify the circuit design before substitution.

Q: Why are some substitutes listed with 6° or 8° viewing angles?

A: These narrow-angle parts are included in the substitute list but are not recommended for general replacement. They concentrate light output in a narrower cone, suitable only for specific applications requiring focused indication. Standard 30° viewing angle parts are appropriate for typical indicator applications.

Q: Are all substitute parts RoHS compliant?

A: Most active production substitutes carry ROHS3 or RoHS compliance certification. WP7143SURC/E, all Everlight 7343 series parts, 7383/R7C3-ARUB/P/MS, C503B-RCN-CW0Z0AA1, and HLMP-EG08-VY000 are certified compliant. Parts 383-2SDRC/S530-A4 and 383-2SURC/S530-A6 do not list compliance status in provided data.

Q: Can I use higher brightness alternatives like C503B-RCN-CW0Z0AA1 without circuit modification?

A: Higher brightness parts operate at slightly elevated forward voltage (2.1V for C503B-RCN-CW0Z0AA1). Verify circuit design accommodates this voltage increase. The 30° viewing angle and through-hole package are compatible. Current-limiting resistor values may require adjustment to maintain proper LED operating current.

Q: What is the maximum height variation among substitute parts?

A: Substitute parts range from 8.60mm to 10.30mm maximum height. All fall within standard through-hole PCB assembly tolerances. Verify PCB clearance for parts exceeding 9.00mm height in space-constrained applications.

Q: Is Everlight 7343-2USRC/S1060 a better choice than WP7143SURC/E?

A: Selection depends on application requirements. WP7143SURC/E provides closest electrical match (1.9V, 1000mcd). Everlight 7343-2USRC/S1060 offers higher brightness (4000mcd) at 2.0V forward voltage. Choose based on required brightness level and circuit voltage capability.

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