CMD333UGD LED Green Diffused T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The CMD333UGD is a green diffused LED indicator manufactured by Visual Communications Company (VCC), designed for discrete indication applications in through-hole mounting configurations. This component features a 5mm T-1 3/4 lens form factor with a forward voltage of 2.1V and 160mcd brightness rating at 30mA test current.

The CMD333UGD is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

CMD333UGD

Visual Communications Company - VCCIn Stock: 935CMD333UGD Datasheet

Current PartRFQ

LTL2R3KG

Lite-On Inc.In Stock: 10149LTL2R3KG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMD333UGD is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Lens size: 5mm, T-1 3/4
• Color: Green
• Lens transparency: Diffused
• Lens style: Round with Domed Top
• Mounting type: Through Hole
• Package type: Radial
• Forward voltage (Vf): 2.1V
• Viewing angle: 40°

Allowable Variation Parameters:

• Millicandela rating: Substitute may exceed original specification
• Current - Test: Substitute may operate at lower test current
• Height: Minor dimensional variation within mechanical compatibility
• Wavelength: Variation within green spectrum acceptable for indication applications
• Product status: Active status preferred for ongoing availability

The LTL2R3KG from Lite-On Inc. satisfies all mandatory matching parameters and represents a direct parametric equivalent suitable for substitution.

Parameter Comparison

Engineering Selection Recommendations

The LTL2R3KG is a direct parametric equivalent for the CMD333UGD and is suitable for substitution in applications requiring green diffused LED indication with T-1 3/4 through-hole mounting.

Compliance Basis:

• Both components are ROHS3 compliant, meeting environmental regulatory requirements
• Both components carry EAR99 ECCN classification
• Both components are classified under HTSUS 8541.41.0000

Availability Advantage: The LTL2R3KG carries Active product status with 10,043 units in stock, compared to the CMD333UGD Obsolete status with limited remaining inventory of 906 units. This substitution ensures long-term supply chain continuity.

Performance Characteristics: The LTL2R3KG operates at identical forward voltage (2.1V) and viewing angle (40°) as the original component. The substitute exhibits higher brightness (180mcd versus 160mcd) and lower test current (20mA versus 30mA), both favorable characteristics for indication applications. Physical dimensions remain compatible within mechanical tolerance.

Frequently Asked Questions (FAQ)

Q: Can the LTL2R3KG directly replace the CMD333UGD in existing circuit designs?

A: Yes. The LTL2R3KG matches all critical electrical parameters: forward voltage (2.1V), viewing angle (40°), and mechanical form factor (5mm T-1 3/4 radial through-hole). No circuit modifications are required.

Q: What is the significance of the higher millicandela rating in the LTL2R3KG?

A: The LTL2R3KG provides 180mcd brightness compared to the CMD333UGD's 160mcd. This represents increased light output, which is compatible with indication applications and does not create functional incompatibility.

Q: Why does the LTL2R3KG operate at lower test current?

A: The LTL2R3KG is specified at 20mA test current versus the CMD333UGD's 30mA. This indicates improved efficiency and does not affect substitution suitability. Circuits designed for 30mA operation will function correctly with the lower-current substitute.

Q: Are there wavelength differences between these components?

A: The CMD333UGD has a peak wavelength of 565nm, while the LTL2R3KG peaks at 575nm. Both wavelengths fall within the green spectrum and are visually indistinguishable for indication purposes. The LTL2R3KG includes a dominant wavelength specification of 572nm.

Q: What is the physical height difference?

A: The CMD333UGD maximum height is 8.61mm; the LTL2R3KG is 8.70mm. This 0.09mm difference is within standard mechanical tolerance and does not affect PCB layout or mechanical clearance in standard through-hole applications.

Q: Is the LTL2R3KG available in the same packaging as the CMD333UGD?

A: The CMD333UGD is supplied in standard packaging, while the LTL2R3KG is supplied in Bulk packaging. Both use identical radial through-hole form factors. Bulk packaging does not affect component electrical or mechanical specifications.

Q: What compliance certifications apply to the LTL2R3KG?

A: The LTL2R3KG is ROHS3 compliant and REACH Affected. The CMD333UGD is ROHS3 compliant and REACH Unaffected. Both carry EAR99 ECCN classification. Compliance status should be verified against specific application requirements.

Q: Why is product status important for this substitution?

A: The CMD333UGD is obsolete with limited inventory (906 units). The LTL2R3KG is Active status with substantial inventory (10,043 units), ensuring availability for current and future production requirements.