LTL-337G Equivalent & Substitute Parts

Part Overview

The LTL-337G is a green diffused LED indication component manufactured by Lite-On Inc., featuring a 569nm dominant wavelength and 2.1V forward voltage. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The LTL-337G operates at 20mA test current with a 19mcd brightness rating and 34° viewing angle in a 5mm round domed lens configuration.

Substiute Parts

LTL-337G

Lite-On Inc.In Stock: 1138LTL-337G Datasheet

Current PartRFQ

LTL-4233

Lite-On Inc.In Stock: 2364LTL-4233 Datasheet

DirectRFQ

1383SYGD/S530-E2

Everlight Electronics Co LtdIn Stock: 9601383SYGD/S530-E2 Datasheet

MFR RecommendedRFQ

383-2SYGD/S530-E2

Everlight Electronics Co LtdIn Stock: 929383-2SYGD/S530-E2 Datasheet

MFR RecommendedRFQ

SSL-LX5093GGD

Lumex Opto/Components Inc.In Stock: 999SSL-LX5093GGD Datasheet

MFR RecommendedRFQ

SSL-LX5093LGD-TR

Lumex Opto/Components Inc.In Stock: 11124SSL-LX5093LGD-TR Datasheet

MFR RecommendedRFQ

SSL-LX5093SUGD

Lumex Opto/Components Inc.In Stock: 6036SSL-LX5093SUGD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTL-337G are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Green or Yellow-Green (within visible spectrum compatibility)
• Lens Transparency: Diffused
• Lens Size: 5.00mm Dia or 5mm T-1 3/4 form factor
• Lens Style: Round with Domed Top
• Mounting Type: Through Hole
• Voltage - Forward (Vf): 2.0V to 2.2V range
• Current - Test: 10mA to 20mA range
• Wavelength - Peak: 565nm to 575nm range
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts listed maintain electrical and mechanical compatibility within these parameters while offering active product status and improved availability compared to the obsolete LTL-337G.

Parameter Comparison

Engineering Selection Recommendations

LTL-4233 (Lite-On Inc.): Direct manufacturer alternative with identical forward voltage (2.1V) and brightness (19mcd). Active product status with ROHS3 compliance. Operates at reduced test current (10mA) compared to LTL-337G. Viewing angle of 36° closely matches the original 34°. Recommended for applications requiring minimal design changes.

SSL-LX5093LGD-TR (Lumex Opto/Components Inc.): Active product with highest inventory availability (11,046 pcs). Green color with 565nm peak wavelength matching the original. Forward voltage of 2.2V is within acceptable range. Offers wider 60° viewing angle and higher brightness (30mcd). ROHS3 compliant. Suitable for designs tolerating slightly higher forward voltage and wider viewing angle.

SSL-LX5093SUGD (Lumex Opto/Components Inc.): Active product with substantial inventory (5,932 pcs). Green color with 574nm peak wavelength. Forward voltage of 2.2V and 60° viewing angle. Significantly higher brightness (170mcd) compared to LTL-337G. ROHS3 compliant. Select when increased brightness is acceptable or beneficial.

1383SYGD/S530-E2 (Everlight Electronics Co Ltd): Yellow-Green color with 573nm dominant wavelength. Higher brightness (200mcd) and 2V forward voltage. Narrower 25° viewing angle. ROHS3 and REACH compliant. Consider for applications where yellow-green indication is functionally equivalent and higher brightness is required.

383-2SYGD/S530-E2 (Everlight Electronics Co Ltd): Yellow-Green color with 573nm dominant wavelength. Moderate brightness (80mcd) and 2V forward voltage. Narrower 25° viewing angle. ROHS3 and REACH compliant. Alternative when yellow-green indication is acceptable with moderate brightness increase.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LTL-337G with LTL-4233 without circuit modifications?

A: LTL-4233 maintains the same forward voltage (2.1V) and brightness (19mcd) as LTL-337G, enabling direct substitution in most applications. The reduced test current (10mA vs 20mA) indicates lower power consumption. Verify circuit current-limiting resistor values accommodate the 10mA specification.

Q: What is the difference between green and yellow-green LED substitutes?

A: Green LEDs (LTL-4233, SSL-LX5093LGD-TR, SSL-LX5093SUGD) emit at 565nm peak wavelength. Yellow-Green LEDs (1383SYGD/S530-E2, 383-2SYGD/S530-E2) emit at 573-575nm peak wavelength. Yellow-green appears slightly more yellow to the human eye. Select based on visual indication requirements and application specifications.

Q: How do viewing angles affect substitution compatibility?

A: LTL-337G has a 34° viewing angle. Substitute parts range from 25° (narrower, more directional) to 60° (wider, more omnidirectional). Narrower angles concentrate light intensity in a specific direction; wider angles distribute light over a broader area. Select based on application viewing geometry and brightness requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (LTL-4233, 1383SYGD/S530-E2, 383-2SYGD/S530-E2, SSL-LX5093LGD-TR, SSL-LX5093SUGD) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the significance of forward voltage differences (2.0V to 2.2V)?

A: Forward voltage variations within the 2.0V to 2.2V range are acceptable for LED indication applications. Circuit current-limiting resistors must be recalculated if forward voltage differs significantly from the original design. A 0.1V difference typically requires minimal resistor adjustment.

Q: Which substitute offers the best inventory availability?

A: SSL-LX5093LGD-TR provides the highest inventory (11,046 pcs), followed by SSL-LX5093SUGD (5,932 pcs) and LTL-4233 (2,300 pcs). Inventory levels support immediate procurement for production requirements.

Q: Can I use higher brightness substitutes without circuit changes?

A: Brightness (millicandela rating) is determined by LED efficiency and test current, not circuit voltage. Higher brightness substitutes (SSL-LX5093SUGD at 170mcd, 1383SYGD/S530-E2 at 200mcd) operate at the same forward voltage and test current as lower brightness alternatives. No circuit modifications are required; visual intensity will simply be greater.