LTL2T3TBK4 Equivalent & Substitute Parts

Part Overview

The LTL2T3TBK4 is a blue 470nm LED indicator manufactured by Lite-On Inc., designed for through-hole mounting in T-1 3/4 (5mm) form factor applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates at 3.5V forward voltage with 680mcd luminous intensity and 30° viewing angle, suitable for standard indication applications requiring discrete radial LED components.

Substiute Parts

LTL2T3TBK4

Lite-On Inc.In Stock: 996LTL2T3TBK4 Datasheet

Current PartRFQ

LTL2T3TBK5

Lite-On Inc.In Stock: 60223LTL2T3TBK5 Datasheet

MFR RecommendedRFQ

151051BS04000

Würth ElektronikIn Stock: 7954151051BS04000 Datasheet

MFR RecommendedRFQ

CMD383UBC/H2

Visual Communications Company - VCCIn Stock: 6036CMD383UBC/H2 Datasheet

MFR RecommendedRFQ

SSL-LX5093SBC/A

Lumex Opto/Components Inc.In Stock: 1119SSL-LX5093SBC/A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTL2T3TBK4 is determined by the following critical parameters:

• Color: Blue
• Lens Size: 5mm, T-1 3/4 form factor
• Mounting Type: Through Hole (Radial)
• Wavelength - Dominant: 470nm
• Current - Test: 20mA
• Viewing Angle: 30°

Substitute parts must maintain compatibility across these core electrical and mechanical specifications. Variations in forward voltage (Vf), millicandela rating, lens transparency, and height are permissible within engineering tolerance, provided the part functions as a direct replacement in the same circuit topology and mechanical footprint.

Parameter Comparison

Engineering Selection Recommendations

LTL2T3TBK5 is the primary substitute, manufactured by the same supplier (Lite-On Inc.) with identical mechanical and electrical core specifications. This part maintains 3.5V forward voltage, 30° viewing angle, and T-1 3/4 form factor. The part is active in production status and ROHS3 compliant, providing long-term availability and regulatory compliance. Millicandela rating increases to 1200mcd, which does not compromise circuit compatibility in standard indication applications.

CMD383UBC/H2 (Visual Communications Company - VCC) provides an alternative with matching mechanical form factor and 30° viewing angle. Forward voltage increases to 3.8V, requiring circuit verification for voltage-sensitive applications. Millicandela rating of 630mcd remains within acceptable range for indication purposes. Part is ROHS3 compliant and active in production.

151051BS04000 (Würth Elektronik) offers substitution with diffused lens transparency and slightly lower forward voltage (3.2V). Viewing angle expands to 40°, and lens diameter reduces to 4.90mm. This part is suitable for applications where diffused light output and wider viewing angle are acceptable. ROHS3 compliant and active in production.

SSL-LX5093SBC/A (Lumex Opto/Components Inc.) is a secondary option with elevated forward voltage (4.5V) and reduced millicandela rating (100mcd). This part is suitable only for applications where lower brightness is acceptable and circuit design accommodates higher forward voltage. ROHS3 compliant and active in production.

Frequently Asked Questions (FAQ)

Q: Can LTL2T3TBK5 be used as a direct replacement for LTL2T3TBK4?

A: Yes. LTL2T3TBK5 maintains identical forward voltage (3.5V), viewing angle (30°), and mechanical form factor (T-1 3/4, 5mm). The increased millicandela rating (1200mcd vs. 680mcd) does not prevent direct substitution in standard indication circuits.

Q: What is the primary difference between LTL2T3TBK4 and 151051BS04000?

A: The 151051BS04000 features a diffused lens (vs. clear), lower forward voltage (3.2V vs. 3.5V), wider viewing angle (40° vs. 30°), and slightly reduced millicandela rating (500mcd vs. 680mcd). Mechanical form factor remains compatible (through-hole, 5mm radial).

Q: Are all substitute parts ROHS3 compliant?

A: LTL2T3TBK5, 151051BS04000, CMD383UBC/H2, and SSL-LX5093SBC/A are all ROHS3 compliant. The original LTL2T3TBK4 compliance status is not specified in available documentation.

Q: Which substitute part has the closest electrical match to LTL2T3TBK4?

A: LTL2T3TBK5 provides the closest match with identical forward voltage (3.5V), wavelength (470nm dominant, 468nm peak), and viewing angle (30°). This part is recommended as the primary substitute.

Q: Can CMD383UBC/H2 be used if forward voltage tolerance is critical?

A: CMD383UBC/H2 operates at 3.8V forward voltage, representing a 0.3V increase from the original 3.5V specification. Circuit design must accommodate this voltage variation. Wavelength peak differs at 430nm vs. 468nm, indicating different LED die characteristics.

Q: Is SSL-LX5093SBC/A suitable for high-brightness applications?

A: No. SSL-LX5093SBC/A provides only 100mcd luminous intensity, significantly lower than the original 680mcd. This part is suitable only for applications where reduced brightness is acceptable or required.

Q: What is the mechanical compatibility across all substitute parts?

A: All substitute parts maintain through-hole radial mounting and 5mm form factor. Height variations range from 8.60mm to 8.95mm, all within standard PCB clearance tolerances. Lens diameter for 151051BS04000 is 4.90mm (vs. 5mm standard), which may affect mechanical fit in tight mounting applications.