SMS1105PKD LED Equivalent & Substitute Parts

Part Overview

The SMS1105PKD is a pink diffused LED indicator manufactured by Bivar Inc., configured as a 2-SMD surface mount right-angle component with J-Lead package. This part operates at 3.4V forward voltage with a 200mcd brightness rating and 120° viewing angle. The SMS1105PKD is classified as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications. The primary substitute relationship exists within the SMS1105 base product family, which shares identical mechanical and electrical interface specifications while offering alternative optical characteristics.

Substiute Parts

SMS1105PKD

Bivar Inc.In Stock: 701SMS1105PKD Datasheet

Current PartRFQ

SMS1105YC

Bivar Inc.In Stock: 31492SMS1105YC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMS1105PKD is determined by strict compatibility across the following parameters:

Mechanical Compatibility Requirements:

• Package type: 2-SMD, J-Lead (2-PLCC supplier package)
• Mounting configuration: Surface Mount, Right Angle
• Physical dimensions: 2.80mm L x 1.20mm W, 0.80mm maximum height
• Lens style: Rectangle with Flat Top
• Lens size: 2.50mm x 0.80mm

Electrical Interface Requirements:

• Test current: 20mA
• Viewing angle: 120°
• Moisture Sensitivity Level: 4 (72 Hours)

Substitution Constraint: The SMS1105PKD is part of the SMS1105 base product family. Substitute parts must maintain identical mechanical mounting interfaces and electrical test parameters. Variations in forward voltage, brightness rating, color, and lens transparency are permissible when the application circuit and optical requirements allow such changes. The SMS1105YC meets all mechanical and electrical interface requirements for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

SMS1105YC Substitution Criteria:

The SMS1105YC is a direct mechanical and electrical interface substitute for the SMS1105PKD. Both components share identical package specifications, mounting configurations, and test current parameters, enabling PCB-level compatibility without redesign of mounting footprints or connector interfaces.

Product Status Consideration: The SMS1105PKD is classified as obsolete, while the SMS1105YC maintains active product status with documented availability of 31,428 units in stock. This status differential supports SMS1105YC selection for new production and long-term supply chain continuity.

Compliance and Certification: The SMS1105YC carries ROHS3 compliance and REACH unaffected status certifications. The SMS1105PKD certification status for these standards is not specified in available documentation. Organizations with regulatory requirements for ROHS3 compliance should prioritize SMS1105YC selection.

Optical and Electrical Differences: Substitution of SMS1105YC for SMS1105PKD introduces three parameter changes: forward voltage reduction from 3.4V to 2.2V, color shift from pink to yellow, and lens transparency change from diffused to clear. These differences require circuit-level evaluation. The 1.2V forward voltage reduction affects current-limiting resistor calculations in LED drive circuits. The color and transparency changes alter visual indication characteristics and may impact application-specific requirements for indicator visibility or color coding schemes.

Frequently Asked Questions (FAQ)

Q: Can SMS1105YC replace SMS1105PKD in existing PCB assemblies without modification?

A: Yes, from a mechanical and mounting perspective. Both components use identical 2-SMD J-Lead packages with 2-PLCC supplier packaging, 2.80mm x 1.20mm x 0.80mm maximum dimensions, and surface mount right-angle mounting configuration. PCB footprints and solder pad layouts are compatible without redesign. However, circuit-level modifications may be required due to the 1.2V forward voltage difference and optical characteristic changes.

Q: What is the impact of the 1.2V forward voltage difference between SMS1105PKD (3.4V) and SMS1105YC (2.2V)?

A: Forward voltage directly affects current-limiting resistor selection in LED drive circuits. A lower forward voltage (SMS1105YC at 2.2V versus SMS1105PKD at 3.4V) results in higher voltage drop across the series resistor for a given supply voltage, requiring resistor value adjustment to maintain the 20mA test current specification. Circuit designers must recalculate resistor values based on the specific supply voltage and desired operating current.

Q: Are there packaging differences between SMS1105PKD and SMS1105YC?

A: Both components are supplied in 2-PLCC packages with identical external dimensions. The SMS1105PKD packaging specification lists "-" (not specified), while SMS1105YC is supplied in Tape & Reel (TR) format. This difference affects procurement and assembly processes but does not impact component functionality or PCB compatibility.

Q: What are the optical differences, and how do they affect application suitability?

A: SMS1105PKD provides pink diffused indication at 200mcd brightness, while SMS1105YC provides yellow clear indication at 250mcd brightness with 592nm dominant wavelength. The diffused lens of SMS1105PKD scatters light over a wider area with softer appearance, while the clear lens of SMS1105YC produces more focused, brighter indication. Color difference (pink to yellow) affects visual identification in multi-indicator applications. Application requirements for indicator color, brightness, and light distribution pattern determine substitution feasibility.

Q: Is SMS1105YC suitable for applications requiring pink LED indication?

A: No. SMS1105YC produces yellow indication at 592nm wavelength, fundamentally different from the pink indication of SMS1105PKD. Applications with color-coded indicator schemes or specific pink color requirements cannot use SMS1105YC as a substitute. Alternative pink LED components within the SMS1105 family or from other manufacturers must be evaluated for such applications.

Q: What is the significance of the MSL 4 (72 Hours) rating for both components?

A: Moisture Sensitivity Level 4 indicates that components must be stored in controlled humidity environments and have a 72-hour floor life after moisture barrier bag opening. Both SMS1105PKD and SMS1105YC share identical MSL specifications, ensuring equivalent handling, storage, and assembly process requirements. No additional moisture management procedures are required when substituting between these components.

Q: Does the SMS1105YC ROHS3 compliance affect substitution decisions?

A: ROHS3 compliance is a regulatory requirement in many markets. SMS1105YC carries documented ROHS3 compliance certification, while SMS1105PKD compliance status is not specified. Organizations operating under ROHS3 regulatory requirements should prioritize SMS1105YC to ensure documented compliance. Verification of SMS1105PKD ROHS3 status through the manufacturer is recommended if this component is required for regulated applications.