LTL2P3TGK Equivalent & Substitute Parts

Part Overview

The LTL2P3TGK is a green LED indicator from Lite-On Inc., featuring a 5mm T-1 3/4 through-hole package with 7000mcd brightness at 525nm wavelength. This component is actively produced and widely used in indication applications requiring standard green illumination at 3.5V forward voltage with 20mA test current.

Substitute parts are necessary when the primary part experiences supply constraints, when alternative manufacturers offer improved specifications, or when design requirements allow for compatible alternatives that meet electrical and mechanical compatibility criteria.

Key Parameters

Parameter	LTL2P3TGK
Manufacturer	Lite-On Inc.
Color	Green
Lens Size	5mm, T-1 3/4
Lens Style	Round with Domed Top
Lens Transparency	Clear
Wavelength - Dominant	525nm
Voltage - Forward (Vf) Typ	3.5V
Current - Test	20mA
Millicandela Rating	7000mcd
Viewing Angle	15°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	8.70mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution compatibility for the LTL2P3TGK is determined by the following critical parameters:

Physical Form Factor: 5mm T-1 3/4 through-hole radial package with round domed lens
Electrical Compatibility: Forward voltage range 2.2V to 3.5V, 20mA test current
Optical Characteristics: Green color, clear lens, wavelength range 522nm to 574nm
Mechanical Fit: Height maximum 8.70mm to 12.25mm, mounting compatibility with standard PCB through-hole patterns
Regulatory Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (3.1V to 3.5V Forward Voltage, 525nm Wavelength) These parts maintain the same dominant wavelength and similar forward voltage characteristics as the LTL2P3TGK, ensuring drop-in compatibility with minimal circuit redesign.

Category B - Functional Alternatives (2.2V to 3.4V Forward Voltage, Extended Wavelength Range) These parts operate at lower forward voltages or different wavelengths but maintain through-hole package compatibility and green color specification, suitable for applications where forward voltage tolerance exists.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Wavelength (nm)	mcd	Viewing Angle	Height (Max)	Product Status	Inventory
LTL2P3TGK	Lite-On Inc.	3.5V	525	7000	15°	8.70mm	Active	1088 Pcs
151053GS03000	Würth Elektronik	3.4V	522	10000	30°	8.85mm	Active	3432 Pcs
HLMP-CM1G-350DD	Broadcom Limited	3.1V	525	43000	15°	8.90mm	Active	13534 Pcs
HLMP-CM3A-Z10DD	Broadcom Limited	3.2V	525	16500	30°	8.90mm	Active	2100 Pcs
HLMP-CM3B-Z10DD	Broadcom Limited	3.2V	525	16500	30°	12.25mm	Active	19428 Pcs
OVLFG3C7	TT Electronics/Optek Technology	3.4V	525	16000	30°	8.70mm	Active	19507 Pcs
SLA-560MT3F	Rohm Semiconductor	2.3V	563	100	40°	7.70mm	Not For New Designs	1972 Pcs
SLA-570MT3F	Rohm Semiconductor	2.3V	563	470	25°	8.85mm	Not For New Designs	69100 Pcs
SSL-LX5093SUGC	Lumex Opto/Components Inc.	2.2V	574	1000	30°	8.60mm	Active	20730 Pcs
XLDG12W	SunLED	3.3V	525	13990	20°	8.60mm	Active	5837 Pcs
XLM2DG12W	SunLED	3.2V	525	18990	20°	8.60mm	Active	2250 Pcs

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, Recommended for New Designs)

HLMP-CM1G-350DD (Broadcom Limited) offers the highest brightness at 43000mcd with matching 525nm wavelength and lower forward voltage (3.1V), providing superior performance margin in current-limited circuits. This part is actively produced with substantial inventory availability.

HLMP-CM3A-Z10DD and HLMP-CM3B-Z10DD (Broadcom Limited) provide 16500mcd brightness at 3.2V forward voltage with 30° viewing angle, offering wider visibility than the LTL2P3TGK. Both are actively produced; HLMP-CM3B-Z10DD features extended height (12.25mm) suitable for applications requiring increased standoff distance.

OVLFG3C7 (TT Electronics/Optek Technology) matches the LTL2P3TGK height specification (8.70mm) with 16000mcd brightness at 3.4V forward voltage and 30° viewing angle. High inventory availability (19507 Pcs) ensures supply continuity.

151053GS03000 (Würth Elektronik) provides 10000mcd brightness at 3.4V forward voltage with 522nm wavelength, maintaining close electrical compatibility with minimal circuit adjustment required.

XLDG12W and XLM2DG12W (SunLED) operate at 3.3V and 3.2V forward voltage respectively, with 525nm wavelength and brightness ratings of 13990mcd and 18990mcd. Both are actively produced with compact 8.60mm height.

Secondary Substitutes (Not For New Designs, Legacy Applications Only)

SLA-560MT3F and SLA-570MT3F (Rohm Semiconductor) are marked "Not For New Designs" and operate at significantly lower forward voltage (2.3V) with different wavelength characteristics (563nm). These parts are suitable only for existing designs where forward voltage tolerance and wavelength shift are acceptable.

SSL-LX5093SUGC (Lumex Opto/Components Inc.) operates at the lowest forward voltage (2.2V) with 574nm wavelength and 1000mcd brightness. This part is suitable for applications requiring minimal power consumption with acceptance of wavelength variation.

Frequently Asked Questions (FAQ)

Q: Can I use HLMP-CM1G-350DD as a direct replacement for LTL2P3TGK?

A: Yes. Both parts share the same 5mm T-1 3/4 through-hole package, 525nm wavelength, 15° viewing angle, and 20mA test current. The HLMP-CM1G-350DD operates at 3.1V forward voltage compared to 3.5V for the LTL2P3TGK, requiring circuit verification to confirm current-limiting resistor compatibility. The significantly higher brightness (43000mcd vs 7000mcd) may require optical attenuation in sensitive applications.

Q: What is the difference between HLMP-CM3A-Z10DD and HLMP-CM3B-Z10DD?

A: Both parts are electrically identical with 3.2V forward voltage, 525nm wavelength, and 16500mcd brightness. The primary difference is physical height: HLMP-CM3A-Z10DD measures 8.90mm maximum height, while HLMP-CM3B-Z10DD measures 12.25mm maximum height. Select based on PCB clearance requirements and desired standoff distance.

Q: Why do SLA-560MT3F and SLA-570MT3F show "Not For New Designs" status?

A: These parts are legacy products no longer recommended for new circuit designs. While they maintain through-hole package compatibility and green color specification, they operate at significantly lower forward voltage (2.3V) and different wavelength (563nm), requiring circuit redesign. Existing designs using these parts may continue operation, but new applications should select from active product alternatives.

Q: Can I substitute a part with lower forward voltage without circuit modification?

A: Lower forward voltage substitutes (such as SSL-LX5093SUGC at 2.2V or SLA-570MT3F at 2.3V) require circuit verification. The current-limiting resistor value must be recalculated to maintain 20mA test current. Failure to adjust the resistor will result in excessive current and premature LED failure. Consult the circuit design specifications before substitution.

Q: What viewing angle should I select?

A: The LTL2P3TGK features 15° viewing angle, providing narrow-beam indication suitable for direct-view applications. Substitutes with 30° viewing angle (HLMP-CM3A-Z10DD, HLMP-CM3B-Z10DD, OVLFG3C7, SSL-LX5093SUGC) provide wider visibility but reduced peak brightness in the direct viewing direction. Select based on application requirements for visibility range and brightness intensity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the LTL2P3TGK. Moisture sensitivity levels vary; most active products specify MSL 1 (Unlimited), while legacy parts may specify MSL 2A (4 Weeks) or Not Applicable.

Q: Which substitute offers the best inventory availability?

A: HLMP-CM3B-Z10DD (Broadcom Limited) provides the highest inventory level at 19428 Pcs, followed by OVLFG3C7 (TT Electronics/Optek Technology) at 19507 Pcs. Both parts are actively produced and suitable for high-volume applications requiring supply security.

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