LTL-4236 Green LED T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The LTL-4236 is a green 569nm LED indication component manufactured by Lite-On Inc., designed for through-hole mounting in 3mm T-1 package format. This part operates at 2.1V forward voltage with a 60mcd brightness rating and 20° viewing angle. The LTL-4236 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while meeting current product availability and compliance standards.

Key Parameters

Parameter	LTL-4236 Specification
Manufacturer	Lite-On Inc.
Color	Green
Wavelength - Dominant	569nm
Voltage - Forward (Vf) Typical	2.1V
Current - Test	10mA
Millicandela Rating	60mcd
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Lens Transparency	Clear
Viewing Angle	20°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.55mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LTL-4236 are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Color: Green wavelength range (560nm–575nm dominant wavelength acceptable)
Forward Voltage (Vf): 2.0V–2.1V typical
Lens Size: 3mm T-1 or equivalent 3mm round package
Mounting Type: Through Hole radial configuration
Lens Style: Round with domed top
Package / Case: Radial

Secondary Considerations:

Millicandela rating (brightness variation acceptable within application tolerance)
Viewing angle (range 20°–45° acceptable for indication applications)
Current rating (10mA–20mA test current acceptable)
Product status and compliance certifications

Substitutes are grouped into two categories: direct equivalents (LTL-4236N) and functional alternatives that meet the core electrical and mechanical requirements while offering different brightness or viewing characteristics.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (V)	Test Current (mA)	Brightness (mcd)	Viewing Angle (°)	Lens Size	Height Max (mm)	Product Status
LTL-4236	Lite-On Inc.	Green	569	2.1	10	60	20	3mm T-1	6.55	Obsolete
LTL-4236N	Lite-On Inc.	Green	569	2.1	10	40	45	3mm T-1	5.85	Active
MV7442	Fairchild Semiconductor	Green	570	2.1	20	120	45	3mm T-1	6.30	Active
HLMP-Y801-JPP00	Broadcom Limited	Green	568	2.1	20	310	30	3mm T-1	5.20	Active
SLR-343MC3F	Rohm Semiconductor	Green	572	2.1	10	25	40	3.10mm	5.60	Not For New Designs
151031VS04000	Würth Elektronik	Green	570	2.1	20	120	40	3.00mm	5.55	Active
264-7SYGC/S530-E2	Everlight Electronics Co Ltd	Yellow-Green	573	2.0	20	100	40	2.90mm	6.30	Active
SLR-343PC3F	Rohm Semiconductor	Green	560	2.1	10	6.3	40	3.10mm	5.60	Last Time Buy

Engineering Selection Recommendations

Preferred Substitute: LTL-4236N LTL-4236N is the manufacturer-recommended direct equivalent from Lite-On Inc. It maintains identical electrical specifications (2.1V, 569nm wavelength) and T-1 package format. The part is active in production with ROHS3 compliance and improved moisture sensitivity rating (MSL 1 vs. MSL 2A). Height reduction to 5.85mm and increased viewing angle to 45° provide enhanced flexibility for PCB layout. This is the primary choice for direct replacement in existing designs.

Active Alternatives for Brightness-Critical Applications:

HLMP-Y801-JPP00 (Broadcom): Highest brightness option at 310mcd with 2.1V operation and T-1 package. Suitable where increased luminous intensity is required. ROHS3 compliant, MSL 1.
MV7442 (Fairchild Semiconductor): 120mcd brightness at 2.1V with 45° viewing angle. ROHS3 compliant. Compact 6.30mm height. Suitable for standard indication applications requiring moderate brightness increase.
151031VS04000 (Würth Elektronik): 120mcd brightness, 2.1V operation, 40° viewing angle. ROHS3 compliant, MSL 1. Diffused lens provides uniform light distribution.

Limited Availability / End-of-Life Alternatives:

SLR-343MC3F (Rohm Semiconductor): Not recommended for new designs. Lower brightness (25mcd) with 2.1V operation. Suitable only for legacy system maintenance where exact brightness matching is required.
SLR-343PC3F (Rohm Semiconductor): Last Time Buy status. Very low brightness (6.3mcd). Use only for legacy applications requiring minimal light output.
264-7SYGC/S530-E2 (Everlight Electronics): Yellow-Green color variant (573nm) at 2.0V. Use only where color shift to yellow-green is acceptable and brightness increase to 100mcd is beneficial.

Frequently Asked Questions (FAQ)

Q: Can LTL-4236N be used as a direct drop-in replacement for LTL-4236? A: Yes. LTL-4236N maintains the same electrical specifications (2.1V, 569nm, T-1 package, through-hole radial mounting) and is the manufacturer-recommended equivalent. The reduced height (5.85mm vs. 6.55mm) and wider viewing angle (45° vs. 20°) are compatible with standard PCB layouts. Verify brightness requirements; LTL-4236N operates at 40mcd versus the original 60mcd.

Q: What is the difference between clear and diffused lens options? A: Clear lenses (LTL-4236, LTL-4236N, HLMP-Y801-JPP00, SLR-343MC3F) provide focused light output with defined viewing angles. Diffused lenses (151031VS04000) scatter light more uniformly across a wider area, reducing peak brightness but improving visibility from off-axis positions. Select based on application requirements for light distribution.

Q: Are all substitute parts ROHS3 compliant? A: Most active substitutes are ROHS3 compliant (LTL-4236N, MV7442, HLMP-Y801-JPP00, 151031VS04000, SLR-343MC3F, SLR-343PC3F). Verify compliance documentation for specific procurement requirements.

Q: What is the impact of different millicandela ratings on circuit design? A: Millicandela rating indicates brightness at the specified test current. Higher mcd values (HLMP-Y801-JPP00 at 310mcd) produce brighter indication with the same forward voltage and current. Lower mcd values (SLR-343PC3F at 6.3mcd) produce dimmer indication. Circuit design remains unchanged; select brightness based on visibility requirements and ambient lighting conditions.

Q: Can I use the yellow-green 264-7SYGC/S530-E2 in place of green LEDs? A: Only if the application permits color change. The 264-7SYGC/S530-E2 operates at 573nm (yellow-green) versus 569nm (green) and uses 2.0V instead of 2.1V. It is electrically compatible but produces visually different color output. Use only where color variation is acceptable.

Q: What mounting considerations apply to height variations? A: Substitute parts range from 5.20mm (HLMP-Y801-JPP00) to 6.55mm (LTL-4236) maximum height. Verify PCB clearance and component placement constraints. Shorter parts (5.20mm–5.85mm) provide additional design flexibility for compact layouts.

Q: Are parts marked "Not For New Designs" or "Last Time Buy" suitable for production? A: SLR-343MC3F (Not For New Designs) and SLR-343PC3F (Last Time Buy) have limited availability and are not recommended for new product development. Use only for legacy system maintenance or where existing inventory is available. Prefer active-status parts (LTL-4236N, MV7442, HLMP-Y801-JPP00, 151031VS04000) for new designs.

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