LTL2P3SEK Equivalent & Substitute Parts

Part Overview

The LTL2P3SEK is a red LED indicator from Lite-On Inc., featuring a 5mm T-1 3/4 through-hole package with 4800mcd brightness at 630nm dominant wavelength. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts maintain the same form factor, mounting type, and general electrical characteristics while offering improved specifications or active product status.

Key Parameters

Parameter	LTL2P3SEK
Manufacturer	Lite-On Inc.
Color	Red
Lens Size	5mm, T-1 3/4
Lens Style	Round with Domed Top
Lens Transparency	Clear
Mounting Type	Through Hole
Package / Case	Radial
Voltage - Forward (Vf) (Typ)	2V
Current - Test	20mA
Millicandela Rating	4800mcd
Wavelength - Dominant	630nm
Wavelength - Peak	639nm
Viewing Angle	22°
Height (Max)	8.70mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

Red color specification
5mm T-1 3/4 through-hole package with radial leads
Round domed lens, clear transparency
Forward voltage within 1.9V to 2.2V range
Test current of 20mA
Wavelength dominant range 624nm to 631nm
Height maximum not exceeding 8.91mm

Secondary Considerations:

Millicandela rating (brightness) may vary; higher ratings provide improved visibility
Viewing angle tolerance (6° to 30°)
Product status (active parts preferred over obsolete)
RoHS3 compliance and MSL rating for manufacturing compatibility

All substitute parts listed maintain mechanical and electrical compatibility with the LTL2P3SEK footprint and circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	mcd	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	RoHS3
LTL2P3SEK	Lite-On Inc.	2V	4800	630nm	22°	8.70mm	Obsolete	—
LTL2H3HRKL13	Lite-On Inc.	2.2V	12000	625nm	15°	8.70mm	Active	Yes
LTL353QRKNN	Lite-On Inc.	1.9V	4200	631nm	12°	8.80mm	Active	Yes
383-2SDRC/S530-A4	Everlight Electronics Co Ltd	2V	2780	639nm	6°	8.90mm	Active	—
383-2SURC/S530-A6	Everlight Electronics Co Ltd	2V	6300	624nm	6°	8.90mm	Active	—
7343-2USRC/S1060	Everlight Electronics Co Ltd	2V	4000	631nm	30°	8.85mm	Active	Yes
HLMP-EG08-VY000	Broadcom Limited	1.9V	8100	626nm	8°	8.91mm	Active	Yes
HLMP-EG08-WZ000	Broadcom Limited	1.9V	10750	626nm	8°	8.91mm	Active	Yes
HLMP-EG08-WZ0DD	Broadcom Limited	1.9V	10750	626nm	8°	8.91mm	Active	Yes
HLMP-EG08-X1000	Broadcom Limited	1.9V	14100	626nm	8°	8.91mm	Active	Yes
HLMP-EG08-Y2000	Broadcom Limited	1.9V	18150	626nm	8°	8.91mm	Active	Yes

Engineering Selection Recommendations

For Direct Replacement (Minimal Circuit Changes): LTL2H3HRKL13 and LTL353QRKNN from Lite-On Inc. maintain the same manufacturer ecosystem and are RoHS3 compliant. LTL2H3HRKL13 matches the original 2V forward voltage exactly, while LTL353QRKNN operates at 1.9V with unlimited MSL rating.

For Active Product Status with Compliance: All Broadcom HLMP-EG08 variants (VY000, WZ000, WZ0DD, X1000, Y2000) are active products with RoHS3 compliance and REACH unaffected status. These parts operate at 1.9V and offer brightness ratings from 8100mcd to 18150mcd. The WZ000 and WZ0DD variants are electrically identical, differing only in packaging (Bulk vs. Tape & Box).

For Everlight Electronics Substitutes: 7343-2USRC/S1060 provides the closest brightness match to the original (4000mcd vs. 4800mcd) with RoHS3 compliance and 30° viewing angle. 383-2SURC/S530-A6 offers higher brightness (6300mcd) at 2V forward voltage.

Voltage Consideration: Parts rated at 1.9V (Broadcom HLMP-EG08 series and LTL353QRKNN) require circuit verification to confirm compatibility with existing current-limiting resistor values. Parts at 2V (LTL2H3HRKL13, Everlight 383 series, 7343-2USRC/S1060) provide direct electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a 1.9V forward voltage part as a direct replacement for the 2V LTL2P3SEK? A: Electrical compatibility depends on circuit design. If the circuit uses a fixed current-limiting resistor, a 1.9V part will draw approximately 5% more current. Verify that the resistor and power supply can accommodate this increase without exceeding component ratings.

Q: What is the difference between HLMP-EG08-WZ000 and HLMP-EG08-WZ0DD? A: These parts are electrically identical (both 10750mcd, 1.9V, 626nm). The difference is packaging: WZ000 is supplied in Bulk, while WZ0DD is supplied in Tape & Box format. Select based on assembly process requirements.

Q: Does the viewing angle difference affect substitution? A: Viewing angle affects light distribution but not electrical compatibility. The original LTL2P3SEK has a 22° viewing angle. Substitutes range from 6° to 30°. Narrower angles (6°-8°) concentrate light in a smaller cone; wider angles (30°) distribute light more broadly. Select based on application visibility requirements.

Q: Are all substitute parts RoHS3 compliant? A: No. Lite-On LTL2H3HRKL13 and LTL353QRKNN, Everlight 7343-2USRC/S1060, and all Broadcom HLMP-EG08 variants are RoHS3 compliant. Everlight 383-2SDRC/S530-A4 and 383-2SURC/S530-A6 do not list RoHS3 status. Verify compliance requirements for your application.

Q: What does MSL rating mean for LED substitution? A: MSL (Moisture Sensitivity Level) indicates storage and handling requirements. The original LTL2P3SEK has MSL 1 (unlimited storage). LTL2H3HRKL13 has MSL 2A (4 weeks maximum). Higher MSL numbers require stricter moisture control during storage and assembly. Verify your manufacturing process can accommodate the MSL requirement.

Q: Can I substitute based on brightness alone? A: No. Brightness (mcd) is one parameter among many. Substitution requires matching the forward voltage, wavelength range, package type, and mounting configuration. A brighter part with incompatible voltage or wavelength is not a valid substitute.

Q: Which substitute offers the best brightness improvement? A: HLMP-EG08-Y2000 provides the highest brightness at 18150mcd (3.8× the original 4800mcd) while maintaining 1.9V forward voltage and 626nm wavelength. However, verify that the circuit design and application can accommodate increased brightness without causing visual or functional issues.

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