LTW-337C5 Equivalent & Substitute Parts

Part Overview

The LTW-337C5 is a white LED indication component manufactured by Lite-On Inc., configured as a through-hole radial T-1 3/4 (5mm) package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The original specification includes a forward voltage of 3.6V, 4800mcd brightness rating, and a 20° viewing angle at 20mA test current.

Substiute Parts

LTW-337C5

Lite-On Inc.In Stock: 1011LTW-337C5 Datasheet

Current PartRFQ

LTW-2R3D7

Lite-On Inc.In Stock: 23281LTW-2R3D7 Datasheet

MFR RecommendedRFQ

334-15/F1C5-1RTA

Everlight Electronics Co LtdIn Stock: 2627334-15/F1C5-1RTA Datasheet

MFR RecommendedRFQ

334-15/T1C3-7TVA

Everlight Electronics Co LtdIn Stock: 1059334-15/T1C3-7TVA Datasheet

MFR RecommendedRFQ

334-15/X1C2-1UWA

Everlight Electronics Co LtdIn Stock: 3651334-15/X1C2-1UWA Datasheet

MFR RecommendedRFQ

334-15/X1C5-6QSA

Everlight Electronics Co LtdIn Stock: 1135334-15/X1C5-6QSA Datasheet

MFR RecommendedRFQ

OVLEW1CB9

TT Electronics/Optek TechnologyIn Stock: 2161OVLEW1CB9 Datasheet

MFR RecommendedRFQ

SLX-LX5093UWC/C

Lumex Opto/Components Inc.In Stock: 12598SLX-LX5093UWC/C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTW-337C5 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: White
• Lens Transparency: Clear
• Lens Style: Round with Domed Top
• Mounting Type: Through Hole
• Package / Case: Radial
• Current - Test: 20mA
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Compatibility Parameters (with allowable variance):

• Lens Size: 5mm, T-1 3/4 or 5.00mm Dia (equivalent form factors)
• Voltage - Forward (Vf): 3.2V to 3.6V range
• Millicandela Rating: 3500mcd to 13500mcd
• Viewing Angle: 15° to 50°
• Height (Max): 8.60mm to 10.40mm

Substitute parts must maintain identical primary criteria while accommodating variance in secondary parameters within the specified ranges. Parts with warm white color variants are included where core electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are classified as Active products, ensuring ongoing availability and manufacturing support. The LTW-2R3D7 (Lite-On Inc.) provides the closest electrical and mechanical alignment to the original LTW-337C5, with identical lens size specification and minimal forward voltage variance (3.4V vs. 3.6V).

For applications requiring ROHS3 compliance and REACH unaffected status, the following substitutes meet these certifications: LTW-2R3D7, 334-15/F1C5-1RTA, 334-15/X1C2-1UWA, OVLEW1CB9, and SLX-LX5093UWC/C.

The 334-15/F1C5-1RTA and 334-15/T1C3-7TVA offer increased brightness ratings (6750mcd and 10700mcd respectively) for applications requiring higher luminous intensity. The OVLEW1CB9 provides the highest brightness specification (35000mcd) with a narrower 15° viewing angle, suitable for focused indication applications.

Height variance ranges from 8.60mm to 10.40mm across all options. Applications with strict PCB clearance requirements should verify the specific height specification of the selected substitute.

Frequently Asked Questions (FAQ)

Q: Can the LTW-337C5 be directly replaced with any of these substitutes?

A: Direct replacement is possible for parts maintaining identical lens size (5mm, T-1 3/4) and forward voltage within the 3.2V to 3.6V range. The LTW-2R3D7 and SLX-LX5093UWC/C are direct mechanical and electrical equivalents. Parts with 5.00mm Dia lens size may require PCB layout verification due to potential dimensional differences.

Q: What is the impact of forward voltage differences?

A: Forward voltage variance from 3.6V (original) to 3.2V (most substitutes) requires circuit current-limiting resistor recalculation. A 0.4V reduction at 20mA test current may necessitate resistor value adjustment to maintain consistent LED brightness and operating point.

Q: Are warm white color variants compatible with applications designed for standard white?

A: Warm white variants (334-15/X1C2-1UWA and 334-15/X1C5-6QSA) differ in color temperature and are suitable only for applications where warm white indication is acceptable. Standard white substitutes are recommended for color-critical applications.

Q: How do brightness rating differences affect circuit design?

A: Millicandela ratings range from 3500mcd to 35000mcd across substitutes. Higher brightness ratings may require reduced forward current or additional optical diffusion to prevent over-illumination. Lower brightness ratings may require increased forward current (within component limits) to maintain visibility.

Q: What is the significance of viewing angle variance?

A: Viewing angle ranges from 15° to 50° across substitutes. Narrower angles (15°-20°) concentrate light intensity for focused applications; wider angles (40°-50°) distribute light for broader visibility. Application mounting geometry and visibility requirements determine optimal angle selection.

Q: Are all substitutes available in bulk packaging?

A: Yes, all listed substitutes are available in bulk packaging. The original LTW-337C5 packaging specification was not provided; bulk packaging is standard for all active alternatives.