SLR343BD2T3F Equivalent & Substitute Parts

Part Overview

The SLR343BD2T3F is a blue LED indication component manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The component features a 3mm T-1 lens form factor with a clear, domed top lens and operates at a forward voltage of 3.2V with a 1000mcd brightness rating at 20mA test current.

Substiute Parts

SLR343BD2T3F

Rohm SemiconductorIn Stock: 888SLR343BD2T3F Datasheet

Current PartRFQ

SLR343BN2T3F

Rohm SemiconductorIn Stock: 3055SLR343BN2T3F Datasheet

SimilarRFQ

3294-15UBGC/S400-A6

Everlight Electronics Co LtdIn Stock: 9103294-15UBGC/S400-A6 Datasheet

SimilarRFQ

OVLBB4C7

TT Electronics / Optek TechnologyIn Stock: 108695OVLBB4C7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SLR343BD2T3F are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Color: Blue
• Mounting Type: Through Hole
• Lens Size: 3mm form factor
• Package Type: Radial
• Voltage - Forward (Vf): 3.2V nominal operation
• Lens Style: Round with Domed Top
• Lens Transparency: Clear

Secondary Consideration Parameters:

• Millicandela Rating (brightness)
• Viewing Angle
• Wavelength characteristics
• Height dimensions
• RoHS and regulatory compliance

The three substitute parts identified meet the primary compatibility criteria while exhibiting variations in brightness, viewing angle, and wavelength that remain within acceptable operational ranges for blue LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

SLR343BN2T3F (Rohm Semiconductor) This substitute maintains identical forward voltage (3.2V), viewing angle (40°), and physical dimensions (5.60mm height) to the main part. It is manufactured by the same supplier as the obsolete part, ensuring design continuity. Product status is active with ROHS3 compliance. The primary difference is reduced brightness (100mcd versus 1000mcd), which may require circuit design adjustment if brightness is a critical application requirement.

3294-15UBGC/S400-A6 (Everlight Electronics Co Ltd) This substitute provides the closest brightness match (800mcd) to the main part and features a wider viewing angle (90° versus 40°). Forward voltage is slightly elevated at 4.6V, requiring circuit verification for compatibility. Height is reduced to 4.45mm, which may affect mechanical fit in existing designs. Product status is active with ROHS3 compliance. Wavelength characteristics differ (505nm dominant, 502nm peak versus 468nm peak), resulting in a slightly different blue hue perception.

OVLBB4C7 (TT Electronics / Optek Technology) This substitute offers the highest brightness rating (1800mcd) among available options and maintains identical forward voltage (3.2V) and lens form factor (3mm T-1). Viewing angle is 45°, closely matching the main part's 40°. Height is 5.35mm, within acceptable tolerance of the original 5.60mm. Product status is active with ROHS3 compliance. This option provides the most direct electrical and mechanical compatibility for applications requiring maintained or increased brightness.

Frequently Asked Questions (FAQ)

Q: Can SLR343BN2T3F be used as a direct replacement for SLR343BD2T3F? A: SLR343BN2T3F is electrically compatible, sharing identical forward voltage (3.2V), viewing angle (40°), and physical height (5.60mm). However, brightness is significantly reduced from 1000mcd to 100mcd. Use this substitute only if the application does not require the original brightness specification.

Q: What is the impact of the 4.6V forward voltage in the 3294-15UBGC/S400-A6 substitute? A: The 0.3V increase in forward voltage requires circuit verification. Current-limiting resistor values may need adjustment to maintain proper LED operation and brightness. Verify that the power supply and circuit design can accommodate this voltage difference.

Q: How does the 90° viewing angle of 3294-15UBGC/S400-A6 affect application suitability? A: The wider 90° viewing angle provides broader light distribution compared to the original 40° angle. This is beneficial for applications requiring visibility from multiple directions but may result in reduced brightness intensity in the forward direction at equivalent current levels.

Q: Is OVLBB4C7 suitable for applications requiring high brightness? A: Yes. OVLBB4C7 provides 1800mcd brightness, exceeding the original part's 1000mcd rating. This makes it suitable for applications requiring equal or increased brightness while maintaining identical forward voltage (3.2V) and compatible physical dimensions.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All three substitute parts (SLR343BN2T3F, 3294-15UBGC/S400-A6, and OVLBB4C7) are ROHS3 compliant, matching the compliance status of the original SLR343BD2T3F.

Q: What is the significance of wavelength differences among the substitutes? A: The main part operates at 468nm peak wavelength. SLR343BN2T3F and OVLBB4C7 operate at 470nm dominant wavelength, producing a visually similar blue hue. The 3294-15UBGC/S400-A6 operates at 505nm dominant wavelength, producing a slightly different blue-green hue. Select based on color consistency requirements for the application.

Q: Can height differences affect mechanical fit? A: Yes. The main part and SLR343BN2T3F are both 5.60mm height. OVLBB4C7 is 5.35mm (0.25mm shorter), and 3294-15UBGC/S400-A6 is 4.45mm (1.15mm shorter). Verify mechanical clearance in PCB designs with height-constrained applications before substitution.