SMP4-BC-RY Equivalent & Substitute Parts

Part Overview

The SMP4-BC-RY is a dual-color surface mount LED indicator manufactured by Bivar Inc., featuring independent red and yellow light-emitting elements in a 4-PLCC package. This component provides visual indication across two distinct wavelengths: 640nm for red and 585nm for yellow. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

SMP4-BC-RY

Bivar Inc.In Stock: 1130SMP4-BC-RY Datasheet

Current PartRFQ

SMTL4-BC-RY

Bivar Inc.In Stock: 936SMTL4-BC-RY Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMP4-BC-RY is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Package designation: 4-PLCC
• Color configuration: Red and Yellow independent elements
• Wavelength specifications: 640nm red, 585nm yellow
• Forward voltage ratings: 1.85V red, 1.9V yellow
• Test current: 20mA for both colors
• Luminous intensity: 36mcd red, 16mcd yellow
• Viewing angle: 120°
• Lens style and size: Round with Flat Top, 2.40mm diameter
• Mounting type: Surface Mount
• Lens transparency: Clear

The SMTL4-BC-RY meets all mandatory matching parameters and qualifies as a direct substitute. The primary distinction between the main part and substitute is product status (obsolete versus active) and packaging format (bulk versus tape & reel), along with minor dimensional variation in maximum height.

Parameter Comparison

Engineering Selection Recommendations

The SMTL4-BC-RY is the direct functional equivalent of the SMP4-BC-RY. All critical electrical and optical parameters are identical. Selection of SMTL4-BC-RY is appropriate for the following conditions:

Product Status Consideration: The SMP4-BC-RY is classified as obsolete. The SMTL4-BC-RY maintains active product status with Bivar Inc., ensuring continued availability and manufacturing support.

Compliance and Certification: The SMTL4-BC-RY carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic components in restricted substance applications.

Packaging Format: The SMTL4-BC-RY is supplied in Tape & Reel (TR) format, standard for automated assembly processes. The original SMP4-BC-RY was supplied in bulk packaging. This distinction affects procurement logistics and assembly workflow but does not alter electrical or optical performance.

Dimensional Tolerance: The maximum height specification differs by 0.20mm (1.85mm versus 2.05mm). This variance remains within typical PCB clearance tolerances for surface mount applications and does not constitute a functional limitation for standard board designs.

Frequently Asked Questions (FAQ)

Q: Can SMTL4-BC-RY be used as a direct replacement for SMP4-BC-RY in existing designs?

A: Yes. The SMTL4-BC-RY is electrically and optically identical to the SMP4-BC-RY. All forward voltages, test currents, wavelengths, and luminous intensity ratings are equivalent. The component will function identically in circuit applications designed for the SMP4-BC-RY.

Q: What is the significance of the height difference between the two parts?

A: The SMP4-BC-RY has a maximum height of 1.85mm, while the SMTL4-BC-RY measures 2.05mm maximum. This 0.20mm difference is negligible for most PCB designs and does not affect electrical performance or standard assembly clearances. Verification is required only for applications with extremely tight vertical space constraints.

Q: Why is the SMTL4-BC-RY supplied in Tape & Reel format while the SMP4-BC-RY was bulk packaged?

A: Tape & Reel (TR) packaging is the industry standard for automated surface mount assembly. This format enables high-speed pick-and-place machine compatibility and is the current manufacturing standard for active products. Bulk packaging is typically associated with legacy or obsolete product lines.

Q: Does ROHS3 compliance on the SMTL4-BC-RY affect compatibility with existing designs?

A: No. ROHS3 compliance indicates adherence to current environmental and restricted substance regulations. This certification does not alter electrical or optical characteristics and is compatible with all applications designed for the original SMP4-BC-RY.

Q: Are there any other Bivar Inc. dual-color LED alternatives in 4-PLCC packages?

A: Substitution eligibility is strictly limited to parts matching all specified parameters: 4-PLCC package, red/yellow independent configuration, 640nm/585nm wavelengths, 1.85V/1.9V forward voltages, 36mcd/16mcd ratings, and 120° viewing angle. Only the SMTL4-BC-RY meets these criteria.

Q: What is the Moisture Sensitivity Level (MSL) rating, and does it affect storage or handling?

A: Both parts carry MSL 4 (72 Hours) rating. This indicates the component can be exposed to ambient conditions (30°C, 60% relative humidity) for up to 72 hours after packaging before soldering. Extended storage requires controlled humidity environments or sealed packaging with desiccant.