Equivalent & Substitute Parts for LTL2T3TBK2

Part Overview

The LTL2T3TBK2 is a blue LED indicator light manufactured by Lite-On Inc., featuring a 5mm T-1 3/4 through-hole package with a clear, domed lens. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The device operates at a forward voltage of 4V with a test current of 20mA and provides 85mcd luminous intensity at a 470nm dominant wavelength.

Substiute Parts

LTL2T3TBK2

Lite-On Inc.In Stock: 842LTL2T3TBK2 Datasheet

Current PartRFQ

LTL2T3TBK5

Lite-On Inc.In Stock: 60223LTL2T3TBK5 Datasheet

MFR RecommendedRFQ

SSL-LX5093SBC/A

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTL2T3TBK2 are identified based on the following critical parameters that determine functional compatibility:

• Color: Blue
• Lens Size: 5mm, T-1 3/4
• Lens Style: Round with Domed Top
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Wavelength Range: 430nm–470nm (dominant or peak)
• Viewing Angle: 30°
• Package / Case: Radial
• Current - Test: 20mA
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must maintain mechanical compatibility (package, lens dimensions, mounting type) and optical characteristics (color, wavelength, viewing angle). Forward voltage and luminous intensity may vary within acceptable ranges for indication applications, provided the part operates within standard LED driver circuit parameters.

Parameter Comparison

Engineering Selection Recommendations

LTL2T3TBK5 (MFR Recommended Substitute)

The LTL2T3TBK5 is the manufacturer-recommended substitute for the obsolete LTL2T3TBK2. Both parts share the same base product number (LTL2T3) and are manufactured by Lite-On Inc. The LTL2T3TBK5 maintains identical mechanical and optical specifications while offering improved luminous intensity (1200mcd versus 85mcd) and a slightly lower forward voltage (3.5V versus 4V). The part is currently in active production with substantial inventory availability. Compliance certifications include ROHS3 and REACH Unaffected status, supporting modern regulatory requirements.

SSL-LX5093SBC/A (Parametric Equivalent)

The SSL-LX5093SBC/A from Lumex Opto/Components Inc. provides parametric equivalence based on mechanical compatibility and optical characteristics. This part maintains the same 5mm T-1 3/4 package, clear domed lens, 30° viewing angle, and 20mA test current. The forward voltage is 4.5V (within 0.5V of the original), and luminous intensity is 100mcd (comparable to the original 85mcd). The peak wavelength of 430nm represents a shift toward the blue-violet spectrum compared to the original 468nm, which may affect color perception in certain applications. This part is active in production and carries ROHS3 and REACH Unaffected certifications.

Frequently Asked Questions (FAQ)

Q: Can the LTL2T3TBK5 be used as a direct replacement for the LTL2T3TBK2?

A: Yes. Both parts share identical mechanical dimensions, package type, lens configuration, and optical viewing angle. The LTL2T3TBK5 operates at a lower forward voltage (3.5V versus 4V) and provides significantly higher luminous intensity (1200mcd versus 85mcd). Circuit designs must accommodate the voltage difference; however, standard LED current-limiting resistor calculations will account for this variation.

Q: What is the primary difference between the LTL2T3TBK5 and SSL-LX5093SBC/A?

A: Both parts are mechanically and optically compatible with the original LTL2T3TBK2. The LTL2T3TBK5 is the manufacturer-recommended option from Lite-On Inc. with higher luminous intensity. The SSL-LX5093SBC/A is a cross-manufacturer equivalent from Lumex with comparable brightness (100mcd) and a forward voltage of 4.5V. The SSL-LX5093SBC/A exhibits a peak wavelength of 430nm, which is shorter than the original 468nm, potentially resulting in a slightly different perceived color.

Q: Are there any compliance or regulatory differences between these parts?

A: The LTL2T3TBK2 does not list RoHS or REACH compliance status. Both substitute parts (LTL2T3TBK5 and SSL-LX5093SBC/A) are certified as ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic components in most markets.

Q: Will the higher luminous intensity of the LTL2T3TBK5 affect circuit operation?

A: The luminous intensity is determined by the LED's internal design and does not directly affect electrical circuit operation. The forward voltage and test current remain the same (3.5V and 20mA, respectively). Standard current-limiting resistor calculations apply. The increased brightness may be beneficial in applications requiring higher visibility.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, provided the PCB footprint accommodates the radial through-hole package and lead spacing. All three parts use identical 5mm T-1 3/4 packages with the same mechanical dimensions and mounting type. No PCB redesign is required for mechanical compatibility.

Q: What is the significance of the wavelength difference in the SSL-LX5093SBC/A?

A: The SSL-LX5093SBC/A has a peak wavelength of 430nm compared to 468nm in the original part. This represents a shift toward the blue-violet spectrum. In applications where color matching or specific wavelength performance is critical, this difference should be evaluated. For general blue LED indication purposes, the difference is typically acceptable.