SM0603UGC Green LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The SM0603UGC is a surface mount green LED manufactured by Bivar Inc. in the 0603 (1608 Metric) package format. This component is classified as obsolete, indicating discontinued production and limited availability. The part functions as a discrete green LED indication element with a forward voltage of 1.9V and brightness rating of 45mcd at 20mA test current. Due to its obsolete status, identification of equivalent substitute parts is necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

SM0603UGC

Bivar Inc.In Stock: 1051SM0603UGC Datasheet

Current PartRFQ

SM0603GC

Bivar Inc.In Stock: 123450SM0603GC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM0603UGC is determined by strict alignment of the following parameters:

Primary Compatibility Criteria:

• Package format: 0603 (1608 Metric) surface mount
• Color: Green
• Lens configuration: Rectangle with Flat Top, Colorless/Clear
• Mounting type: Surface Mount
• Lens size: 1.00mm x 0.80mm

Secondary Electrical Parameters:

• Forward voltage (Vf): Range tolerance around 1.9V to 2.1V
• Test current: 20mA standard
• Viewing angle: 130° minimum
• Wavelength range: Green spectrum (565nm to 575nm)

The SM0603GC qualifies as a substitute part based on matching package, color, lens configuration, mounting type, and lens dimensions. Electrical parameters remain within acceptable tolerance for green LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

SM0603GC as Primary Substitute:

The SM0603GC is the direct substitute for the obsolete SM0603UGC. Both components are manufactured by Bivar Inc. and share identical package, mounting, and mechanical specifications. The SM0603GC holds active product status with current manufacturing and availability.

Compliance Advantages:

The SM0603GC provides ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. The SM0603UGC specifications do not include these compliance certifications.

Electrical Parameter Differences:

Forward voltage increases from 1.9V to 2.1V, representing a 0.2V differential within acceptable tolerance for green LED indication circuits. Peak wavelength shifts from 575nm to 568nm, remaining within the green spectrum range. Brightness decreases from 45mcd to 15mcd; circuit designs must accommodate this reduced luminous intensity through adjusted current limiting or optical design modifications.

Physical Dimension Variance:

Maximum height increases from 0.60mm to 0.80mm. PCB layout and clearance verification is required for applications with height-constrained designs.

Moisture Sensitivity Consideration:

MSL rating changes from 2A (4 Weeks) to 4 (72 Hours), indicating different moisture absorption characteristics. Storage and handling procedures must align with the substitute part's MSL classification.

Frequently Asked Questions (FAQ)

Q: Can SM0603GC directly replace SM0603UGC without circuit modification?

A: SM0603GC is mechanically and functionally compatible for standard green LED indication applications. Forward voltage tolerance (1.9V to 2.1V) is acceptable for most designs. Brightness reduction (45mcd to 15mcd) may require circuit evaluation if luminous intensity is critical to application performance.

Q: What is the impact of the 0.2V forward voltage difference?

A: The forward voltage increase from 1.9V to 2.1V affects current limiting resistor calculations. Designs using fixed resistor values must verify that the substitute part operates within specified current range (20mA test current). Recalculation of series resistance may be necessary for voltage-sensitive applications.

Q: Are there height clearance concerns with the SM0603GC?

A: The SM0603GC maximum height is 0.80mm compared to 0.60mm for the SM0603UGC. This 0.20mm increase must be verified against PCB layout constraints, component stacking requirements, and enclosure clearances.

Q: Does the wavelength shift from 575nm to 568nm affect visual appearance?

A: Both wavelengths fall within the green spectrum. The 7nm shift is not perceptually significant for human observation of LED indication status. Color matching with adjacent components or existing designs should be evaluated if aesthetic consistency is required.

Q: What are the storage and handling differences?

A: SM0603GC has MSL rating 4 (72 Hours) versus SM0603UGC MSL 2A (4 Weeks). The substitute part absorbs moisture more rapidly and requires stricter environmental control during storage and handling. Bake-out procedures may be necessary before reflow soldering if the component has exceeded its moisture absorption window.

Q: Is the SM0603GC available in the same packaging format?

A: SM0603GC is supplied in Tape & Reel (TR) format. Verify that your assembly process accommodates tape and reel packaging. The SM0603UGC packaging format is not specified in available data.

Q: Are there regulatory compliance advantages to using SM0603GC?

A: Yes. SM0603GC is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component procurement in most jurisdictions. The SM0603UGC does not specify these compliance certifications.