SMP2-BWC Equivalent & Substitute Parts

Part Overview

The SMP2-BWC is a blue 466nm LED indication component in a 2-PLCC surface mount package manufactured by Bivar Inc. Designed for discrete 3.3V applications, this component features a 50mcd millicandela rating with 120° viewing angle. The SMP2-BWC is classified as obsolete. Locating equivalent and substitute parts is necessary to ensure circuit continuity and design flexibility when the primary component becomes unavailable or when cost optimization is required.

Substiute Parts

SMP2-BWC

Bivar Inc.In Stock: 1141SMP2-BWC Datasheet

Current PartRFQ

SMTL2-BWC

Bivar Inc.In Stock: 1012SMTL2-BWC Datasheet

Parametric EquivalentRFQ

67-21SUBC/S400-X9/TR8

Everlight Electronics Co LtdIn Stock: 111167-21SUBC/S400-X9/TR8 Datasheet

SimilarRFQ

APED3528VBC/D

KingbrightIn Stock: 20849APED3528VBC/D Datasheet

SimilarRFQ

QTLP670CBTR

Fairchild SemiconductorIn Stock: 16138QTLP670CBTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMP2-BWC are classified based on electrical and mechanical compatibility criteria. The substitution logic relies on the following mandatory parameters:

• Color and Wavelength: Blue color designation with dominant wavelength in the range of 465nm to 470nm
• Forward Voltage (Vf): Nominal forward voltage between 3.3V and 3.8V at 20mA test current
• Test Current: 20mA standard test condition
• Viewing Angle: 120° viewing angle for comparable light distribution
• Mounting Type: Surface mount configuration
• Package Compatibility: 2-PLCC or equivalent compact surface mount packages (including 1411/3528 metric equivalents)
• Optical Intensity: Millicandela rating between 30mcd and 550mcd

Parts meeting these electrical specifications are categorized as parametric equivalents or similar manufacturers' alternatives. Deviations in any single parameter within the specified ranges do not preclude substitution validity; however, circuit design verification is required when forward voltage, current ratings, or optical intensity differ from nominal SMP2-BWC specifications.

Parameter Comparison

Engineering Selection Recommendations

SMTL2-BWC (Bivar Inc.) is the primary recommended substitute. This part maintains identical electrical specifications (3.3V forward voltage, 20mA test current, 50mcd rating, 120° viewing angle) and mechanical compatibility (2-PLCC package, same footprint dimensions). SMTL2-BWC is active and ROHS3 compliant, with 916 units in stock.

QTLP670CBTR (Fairchild Semiconductor) is a secondary substitute option. This 2-PLCC packaged part maintains the same physical footprint and 120° viewing angle. The forward voltage is higher at 3.8V and optical intensity is lower at 30mcd, requiring verification against specific circuit requirements. This part is active with 16,100 units in stock.

67-21SUBC/S400-X9/TR8 (Everlight Electronics) and APED3528VBC/D (Kingbright) utilize the 1411 (3528 Metric) package, which introduces footprint differences. These parts are suitable only when PCB layout accommodates the alternate package geometry. 67-21SUBC/S400-X9/TR8 features a 0.85mm height profile significantly lower than SMP2-BWC. APED3528VBC/D provides substantially higher optical intensity at 550mcd with a narrower 40° viewing angle and taller 3.20mm profile.

Selection between recommended alternatives depends on circuit voltage tolerance, optical intensity requirements, footprint constraints, and availability.

Frequently Asked Questions (FAQ)

Q: Can SMTL2-BWC directly replace SMP2-BWC without circuit modification? A: Yes. SMTL2-BWC is a parametric equivalent with identical forward voltage (3.3V), test current (20mA), millicandela rating (50mcd), and viewing angle (120°). The 2-PLCC package footprints are identical. The only difference is height (2.10mm vs. 2.00mm), which is negligible for standard PCB layouts. No circuit redesign is required.

Q: Is package compatibility a substitution requirement? A: Package compatibility is essential for direct substitution without PCB redesign. SMTL2-BWC and QTLP670CBTR maintain the 2-PLCC package geometry. The 67-21SUBC/S400-X9/TR8 and APED3528VBC/D utilize 1411 (3528 Metric) packages with different footprints and may require PCB layout modifications.

Q: What is the significance of forward voltage differences among substitutes? A: Forward voltage directly affects circuit current limiting and power dissipation. SMP2-BWC operates at 3.3V; QTLP670CBTR operates at 3.8V (0.5V higher), which requires circuit verification. Everlight's 67-21SUBC/S400-X9/TR8 operates at 3.5V. Kingbright's APED3528VBC/D matches at 3.3V. Higher forward voltages reduce available voltage margin in the circuit.

Q: What viewing angle differences indicate about substitution? A: Viewing angle defines light distribution characteristics. SMP2-BWC provides 120° wide-angle distribution suitable for general indication applications. APED3528VBC/D provides 40° narrow-angle distribution, concentrating light output. This substitution is valid only when optical distribution requirements align with the narrower specification.

Q: What does "Active" product status mean for substitutes? A: Active status indicates the substitute part is currently manufactured and supplied. All substitute parts listed—SMTL2-BWC, 67-21SUBC/S400-X9/TR8, APED3528VBC/D, and QTLP670CBTR—are active, ensuring long-term supply continuity.

Q: How does millicandela rating affect substitution? A: Millicandela rating defines optical intensity. SMP2-BWC provides 50mcd. Substitutes range from 30mcd (QTLP670CBTR) to 550mcd (APED3528VBC/D). Higher intensity increases visible brightness; lower intensity decreases it. Substitution is valid when the design circuit accommodates the optical intensity variance.

Q: What is the difference between Tape & Reel and Bulk packaging? A: Tape & Reel packaging is standard for high-volume surface mount assembly, supplying components in continuous reels for automatic pick-and-place equipment. Bulk packaging supplies loose components. SMTL2-BWC, 67-21SUBC/S400-X9/TR8, and APED3528VBC/D are supplied in Tape & Reel. QTLP670CBTR is supplied in Bulk, which may require additional handling or custom packaging for automated assembly.