CMD31104UG Equivalent & Substitute Parts Reference

Part Overview

The CMD31104UG is a green LED indicator manufactured by Visual Communications Company (VCC) designed for through-hole applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance requirements. The CMD31104UG provides green light indication in discrete 2.2V radial configuration with a 3mm T-1 form factor and 200 millicandela brightness rating.

Key Parameters

Parameter	Value
Color	Green
Lens Transparency	Clear
Millicandela Rating	200mcd
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.2V
Current - Test	20mA
Viewing Angle	30°
Mounting Type	Through Hole
Wavelength - Peak	565nm
Package / Case	Radial
Supplier Device Package	T-1
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the CMD31104UG are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Primary Matching Criteria:

Color: Green
Lens Transparency: Clear
Millicandela Rating: 200mcd
Lens Size: 3mm, T-1
Voltage - Forward (Vf): 2.2V
Current - Test: 20mA
Viewing Angle: 30°
Mounting Type: Through Hole
Wavelength - Peak: 565nm
Package / Case: Radial
Supplier Device Package: T-1
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Direct Substitute Category: SSL-LX3044SGC (Lumex Opto/Components Inc.) matches all primary electrical and mechanical parameters with identical specifications.

Similar Substitute Category: SSL-LX3044SGT (Lumex Opto/Components Inc.) matches all primary electrical and mechanical parameters with one variation: lens color is green rather than colorless.

Parameter Comparison

Parameter	CMD31104UG (VCC)	SSL-LX3044SGC (Lumex)	SSL-LX3044SGT (Lumex)
Product Status	Obsolete	Active	Active
Color	Green	Green	Green
Lens Color	Colorless	Colorless	Green
Lens Transparency	Clear	Clear	Clear
Millicandela Rating	200mcd	200mcd	200mcd
Lens Size	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.2V	2.2V	2.2V
Current - Test	20mA	20mA	20mA
Viewing Angle	30°	30°	30°
Mounting Type	Through Hole	Through Hole	Through Hole
Wavelength - Peak	565nm	565nm	565nm
Package / Case	Radial	Radial	Radial
Supplier Device Package	T-1	T-1	T-1
Height (Max)	4.00mm	4.60mm	4.60mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SSL-LX3044SGC Selection: SSL-LX3044SGC is the direct substitute for CMD31104UG. Both components share identical electrical characteristics (2.2V forward voltage, 20mA test current, 200mcd brightness) and mechanical specifications (3mm T-1 through-hole radial package). SSL-LX3044SGC maintains active product status, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and REACH unaffected. The substitute offers improved moisture sensitivity rating (MSL 1 versus MSL 2), providing superior performance in humid environments. Height specification increases from 4.00mm to 4.60mm; verify PCB layout clearance before implementation.

SSL-LX3044SGT Selection: SSL-LX3044SGT functions as an alternative substitute with identical electrical and optical performance. The primary distinction is lens color specification: green lens versus colorless lens on SSL-LX3044SGC. This variation affects visual appearance and light transmission characteristics through the lens material. SSL-LX3044SGT maintains active product status and equivalent compliance certifications. Height specification matches SSL-LX3044SGC at 4.60mm maximum. Select SSL-LX3044SGT only when green lens coloration is required by application design specifications.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX3044SGC directly replace CMD31104UG in existing designs? A: Yes. SSL-LX3044SGC matches all critical electrical parameters (2.2V forward voltage, 20mA test current) and optical specifications (200mcd, 565nm peak wavelength, 30° viewing angle). Both use identical 3mm T-1 through-hole radial packages. Verify PCB layout accommodates the 4.60mm maximum height (0.60mm increase from original 4.00mm specification).

Q: What is the difference between SSL-LX3044SGC and SSL-LX3044SGT? A: Both parts are electrically and optically identical. The difference is lens color: SSL-LX3044SGC has a colorless lens, while SSL-LX3044SGT has a green lens. This affects the visual appearance of the emitted light and light transmission through the lens material. Select based on application aesthetic and optical requirements.

Q: Are both substitute parts RoHS and REACH compliant? A: Yes. Both SSL-LX3044SGC and SSL-LX3044SGT are ROHS3 compliant and REACH unaffected, matching the compliance status of the original CMD31104UG.

Q: What is the significance of the MSL rating difference? A: CMD31104UG has MSL 2 (1 Year storage limit), while both Lumex substitutes have MSL 1 (Unlimited storage). MSL 1 indicates superior moisture resistance and longer shelf life without requiring special storage conditions.

Q: Are there any mechanical compatibility concerns? A: The primary mechanical consideration is height: CMD31104UG maximum height is 4.00mm, while both Lumex substitutes are 4.60mm maximum. Verify PCB layout and component clearance before implementation. All three parts use identical 3mm T-1 through-hole radial packages and are mechanically compatible with standard LED mounting holes.

Q: Why is CMD31104UG classified as obsolete? A: Obsolete status indicates the manufacturer (VCC) has discontinued production. Active substitutes from Lumex Opto/Components Inc. ensure continued availability for new production and maintenance applications.

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