Equivalent & Substitute Parts for LTL2T3TBK3

Part Overview

The LTL2T3TBK3 is a blue LED indicator from Lite-On Inc., featuring a 5mm T-1 3/4 through-hole package with 470nm dominant wavelength and 520mcd brightness rating. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across electrical characteristics, mechanical form factor, and mounting specifications to ensure direct replacement capability in existing circuit designs.

Substiute Parts

LTL2T3TBK3

Lite-On Inc.In Stock: 1126LTL2T3TBK3 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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTL2T3TBK3 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Lens size: 5mm, T-1 3/4 (mechanical fit requirement)
• Mounting type: Through hole (circuit board interface)
• Color: Blue (optical and functional requirement)
• Viewing angle: 30° (optical performance specification)
• Forward voltage range: 3.5V to 4.5V (circuit design tolerance)
• Current rating: 20mA test current (electrical compatibility)

Substitute Classification:

Group 1 - Direct Manufacturer Equivalent: LTL2T3TBK5 (Lite-On Inc.) maintains identical electrical and mechanical specifications with enhanced brightness (1200mcd vs 520mcd) and active product status.

Group 2 - Cross-Manufacturer Alternative: SSL-LX5093SBC/A (Lumex Opto/Components Inc.) provides mechanical and mounting compatibility with acceptable wavelength variation (430nm peak vs 470nm dominant) and forward voltage tolerance (4.5V vs 3.5V).

Parameter Comparison

Engineering Selection Recommendations

LTL2T3TBK5 Selection Criteria: LTL2T3TBK5 is the primary substitute for LTL2T3TBK3. Both parts share identical forward voltage (3.5V), wavelength specifications (470nm dominant, 468nm peak), and mechanical dimensions. LTL2T3TBK5 maintains active product status and ROHS3 compliance, providing long-term supply availability. The increased brightness rating (1200mcd vs 520mcd) represents an enhancement suitable for applications where the original brightness was marginal. This part is recommended for direct replacement in new production and redesign efforts.

SSL-LX5093SBC/A Selection Criteria: SSL-LX5093SBC/A serves as an alternative when LTL2T3TBK5 availability is constrained. This part maintains mechanical compatibility (5mm T-1 3/4 through-hole) and identical viewing angle (30°). The forward voltage differential (4.5V vs 3.5V) requires circuit verification to confirm series resistor adjustment compatibility. The wavelength shift (430nm peak vs 470nm dominant) and reduced brightness (100mcd vs 520mcd) necessitate optical performance evaluation for the specific application. ROHS3 compliance and REACH unaffected status confirm regulatory alignment. This part is suitable for applications with flexible brightness and wavelength tolerances.

Frequently Asked Questions (FAQ)

Q: Can LTL2T3TBK5 be used as a direct drop-in replacement for LTL2T3TBK3?

A: Yes. LTL2T3TBK5 maintains identical forward voltage (3.5V), wavelength (470nm dominant), viewing angle (30°), and mechanical dimensions (8.70mm height, 5mm T-1 3/4 package). No circuit modifications are required. The increased brightness (1200mcd vs 520mcd) is compatible with existing designs.

Q: What are the key differences between LTL2T3TBK5 and SSL-LX5093SBC/A?

A: LTL2T3TBK5 maintains exact electrical and optical specifications of the original part. SSL-LX5093SBC/A introduces three differences: forward voltage (4.5V vs 3.5V), wavelength peak (430nm vs 470nm), and brightness (100mcd vs 520mcd). Circuit redesign may be necessary for SSL-LX5093SBC/A implementation.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All three parts use identical 5mm T-1 3/4 through-hole packages with radial lead configuration. Mechanical fit on existing PCBs is guaranteed. Electrical circuit verification is required only for SSL-LX5093SBC/A due to forward voltage difference.

Q: What is the impact of the forward voltage difference in SSL-LX5093SBC/A?

A: SSL-LX5093SBC/A requires 4.5V forward voltage compared to 3.5V for the original part. This 1V difference affects series resistor calculations. Existing resistor values may require adjustment to maintain proper current limiting at 20mA test current.

Q: Are there compliance or supply chain advantages to selecting one substitute over another?

A: LTL2T3TBK5 offers superior supply availability (60,200 pcs in stock vs 1,104 pcs for SSL-LX5093SBC/A) and maintains the same manufacturer as the original part, reducing qualification risk. Both parts are ROHS3 compliant and REACH unaffected. LTL2T3TBK5 is the preferred choice for production continuity.

Q: Can SSL-LX5093SBC/A be used in applications requiring 470nm wavelength specification?

A: No. SSL-LX5093SBC/A has a peak wavelength of 430nm, which differs from the 470nm dominant wavelength of the original part. Applications with strict wavelength requirements must use LTL2T3TBK5.