SML312BC4TT86 Equivalent & Substitute Parts

Part Overview

The SML312BC4TT86 is a blue 470nm LED indication component in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This part features a clear colorless lens with 46mcd brightness rating and 3.2V forward voltage. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

SML312BC4TT86

Rohm SemiconductorIn Stock: 3403SML312BC4TT86 Datasheet

Current PartRFQ

SMLD12BN1WT86

Rohm SemiconductorIn Stock: 15528SMLD12BN1WT86 Datasheet

MFR RecommendedRFQ

SMLE13BC8TT86

Rohm SemiconductorIn Stock: 45085SMLE13BC8TT86 Datasheet

SimilarRFQ

19-219/B6C-ZN1P2TY/3T

Everlight Electronics Co LtdIn Stock: 115419-219/B6C-ZN1P2TY/3T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SML312BC4TT86 is determined by the following critical parameters:

• Color and Wavelength: All substitutes must be blue LEDs with 470nm dominant wavelength
• Package Type: All substitutes must use 0603 (1608 Metric) surface mount package
• Mounting Compatibility: Surface mount configuration required
• Electrical Characteristics: Forward voltage (Vf) and test current define operational compatibility
• Optical Properties: Lens color and transparency affect light output characteristics
• Compliance: RoHS3 compliance and MSL rating must be maintained

The substitute parts listed below meet these core substitution criteria while accommodating variations in forward voltage, brightness rating, and lens properties.

Parameter Comparison

Engineering Selection Recommendations

SMLD12BN1WT86 (Rohm Semiconductor) is the primary recommended substitute. This part maintains Rohm Semiconductor manufacturing continuity with active product status, ensuring long-term availability. It carries identical RoHS3 compliance and MSL rating. The forward voltage is lower at 2.9V compared to 3.2V, and test current is reduced to 5mA. The white diffused lens provides different optical characteristics than the original clear lens. This part is suitable for applications where the lower forward voltage and diffused lens properties are acceptable.

SMLE13BC8TT86 (Rohm Semiconductor) provides an alternative with clear lens matching the original optical properties. Forward voltage is 2.9V with 5mA test current. Product status is obsolete, similar to the original part. RoHS3 compliance and MSL rating are maintained. This substitute is appropriate when clear lens transparency is required and obsolete product status is acceptable.

19-219/B6C-ZN1P2TY/3T (Everlight Electronics Co Ltd) offers active product status with the highest brightness rating at 50.25mcd and lowest forward voltage at 2.8V. Clear lens transparency matches the original optical design. This part introduces a different manufacturer and does not specify RoHS or MSL compliance in the provided data. Selection of this substitute requires confirmation of compliance requirements for your application.

Frequently Asked Questions (FAQ)

Q: Can SMLD12BN1WT86 be used as a direct replacement for SML312BC4TT86?

A: SMLD12BN1WT86 is electrically compatible as a substitute within the 0603 (1608 Metric) package. However, the diffused white lens differs from the original clear colorless lens, affecting light distribution and appearance. Forward voltage is lower (2.9V vs 3.2V) and test current is reduced (5mA vs 20mA). Circuit design must accommodate these electrical differences.

Q: What is the primary difference between SMLE13BC8TT86 and SMLD12BN1WT86?

A: Both parts share identical electrical specifications (2.9V forward voltage, 5mA test current, 40mcd brightness). The key difference is lens design: SMLE13BC8TT86 has a clear colorless lens matching the original SML312BC4TT86, while SMLD12BN1WT86 has a white diffused lens. SMLE13BC8TT86 is also obsolete like the original part.

Q: Why does 19-219/B6C-ZN1P2TY/3T have different specifications?

A: 19-219/B6C-ZN1P2TY/3T is manufactured by Everlight Electronics rather than Rohm Semiconductor. It features a lower forward voltage (2.8V), higher brightness rating (50.25mcd), and wider viewing angle (120°). These differences reflect different design and manufacturing approaches while maintaining the same 470nm blue wavelength and 0603 package.

Q: Are all substitute parts RoHS3 compliant?

A: SMLD12BN1WT86 and SMLE13BC8TT86 are confirmed ROHS3 compliant. RoHS compliance status is not specified in the provided data for 19-219/B6C-ZN1P2TY/3T. Verify compliance requirements with your application specifications before selection.

Q: What is the impact of forward voltage differences on circuit design?

A: The original SML312BC4TT86 operates at 3.2V forward voltage. Substitutes operate at 2.8V to 2.9V. This lower voltage reduces power consumption and heat generation. Current-limiting resistor values in the circuit must be recalculated based on the selected substitute's forward voltage to maintain proper LED operation and brightness.

Q: Can lens color and transparency be changed without affecting functionality?

A: Lens color and transparency affect light output characteristics and visual appearance but do not impact electrical functionality. A clear lens provides focused light output, while a diffused lens spreads light over a wider area. Selection depends on the specific application requirements for light distribution and visual effect.