CMD3350 Yellow LED T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The CMD3350 is a yellow LED indicator manufactured by Visual Communications Company (VCC) in a T-1 3/4 through-hole radial package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The CMD3350 delivers 150 millicandela at 2.2V forward voltage with a 24° viewing angle, suitable for discrete yellow indication applications requiring moderate brightness and narrow beam concentration.

Key Parameters

Parameter	CMD3350 Value	Significance for Substitution
Color	Yellow	Primary functional requirement; all substitutes must be yellow
Lens Transparency	Clear	Determines light transmission and appearance; affects brightness perception
Lens Size / Package	5mm, T-1 3/4	Physical form factor; determines PCB footprint and mounting compatibility
Voltage - Forward (Vf) Typical	2.2V	Circuit design parameter; affects current-limiting resistor selection
Current - Test	20mA	Operating point specification; determines power dissipation and brightness
Millicandela Rating	150mcd	Brightness specification; critical for visibility requirements
Viewing Angle	24°	Beam concentration; affects application suitability
Wavelength - Peak	585nm	Color specification; ensures consistent yellow hue
Mounting Type	Through Hole	Assembly method; determines PCB design compatibility
RoHS Status	ROHS3 Compliant	Environmental and regulatory compliance requirement

Substitute Part Grouping Explanation

Substitution logic for the CMD3350 is based on the following critical parameters:

Primary Matching Criteria:

Color: Yellow (non-negotiable)
Lens Size: 5mm, T-1 3/4 (physical compatibility)
Mounting Type: Through Hole Radial (PCB assembly compatibility)
Wavelength - Peak: 583–585nm (yellow hue consistency)
RoHS3 Compliance: Required for regulatory alignment

Secondary Matching Criteria:

Voltage - Forward (Vf): 2.1–2.2V (circuit design compatibility; allows ±0.1V tolerance)
Current - Test: 20mA (operating point specification)
Millicandela Rating: 140–150mcd (brightness class; narrow range for direct replacement)
Viewing Angle: 24–28° (beam concentration; narrow viewing angle category)
Lens Transparency: Clear (optical performance match)

Acceptable Variation Ranges:

Forward voltage tolerance: ±0.1V from 2.2V specification
Brightness tolerance: ±10% from 150mcd baseline
Viewing angle tolerance: ±4° from 24° specification

Substitutes are grouped into two categories: Direct Equivalents (matching all primary and secondary criteria) and Functional Alternatives (matching primary criteria with acceptable secondary parameter variations).

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Product Status	RoHS3
CMD3350	VCC	Yellow	Clear	2.2V	20mA	150mcd	24°	585nm	Obsolete	Yes
4308H7	VCC	Yellow	Clear	2.2V	20mA	140mcd	24°	583nm	Active	Yes
HLMP-3850-K0002	Broadcom Limited	Yellow	Clear	2.1V	20mA	140mcd	24°	583nm	Active	Yes
MV5352	onsemi	Yellow	Clear	2.1V	20mA	90mcd	28°	585nm	Obsolete	Yes
MV5352A4R0	Everlight Electronics Co Ltd	Yellow	Clear	2.1V	20mA	90mcd	28°	585nm	Active	Yes
5219284F	Dialight	Yellow	Diffused	10V	10mA	8mcd	60°	583nm	Active	Yes
5219321F	Dialight	Yellow	Diffused	1.9V	2mA	1.8mcd	50°	583nm	Active	Yes
HLMP-4719	Broadcom Limited	Yellow	Diffused	1.8V	2mA	2.1mcd	50°	585nm	Active	Yes
HLMP47199MP7	onsemi	Yellow	Diffused, Tinted	1.9V	2mA	2.1mcd	50°	565nm	Obsolete	Yes
HLMP4719A3R0	Everlight Electronics Co Ltd	Yellow	Diffused	1.9V	2mA	2mcd	35°	585nm	Active	Yes
MV5353	onsemi	Yellow	Diffused	2.1V	20mA	15mcd	65°	585nm	Obsolete	Yes

Engineering Selection Recommendations

Direct Equivalent Substitutes (Highest Compatibility):

The following parts provide direct substitution for CMD3350 with matching electrical and optical specifications:

4308H7 (VCC): Active product status. Identical forward voltage (2.2V), current (20mA), viewing angle (24°), and lens transparency (clear). Brightness specification of 140mcd represents 93% of CMD3350 rating, within acceptable tolerance. Peak wavelength 583nm maintains yellow hue consistency. Recommended as primary replacement due to same manufacturer and active production status.
HLMP-3850-K0002 (Broadcom Limited): Active product status. Forward voltage 2.1V (within ±0.1V tolerance), current 20mA, viewing angle 24°, and clear lens transparency match CMD3350 requirements. Brightness 140mcd and peak wavelength 583nm provide functional equivalence. Tape & Reel packaging differs from original bulk packaging; verify procurement requirements.

Secondary Equivalent Substitutes (Acceptable with Circuit Adjustment):

MV5352A4R0 (Everlight Electronics Co Ltd): Active product status. Forward voltage 2.1V and current 20mA maintain circuit compatibility. Brightness 90mcd represents 60% of CMD3350 rating; suitable only for applications where reduced brightness is acceptable. Viewing angle 28° (4° wider than CMD3350) provides slightly broader beam. Peak wavelength 585nm ensures yellow hue match. Recommended only when brightness reduction is tolerable.

Non-Equivalent Parts (Not Recommended for Direct Replacement):

The following parts deviate significantly from CMD3350 specifications and are unsuitable for direct substitution:

5219284F, 5219321F (Dialight): Diffused lens transparency differs from clear specification. Operating currents (10mA, 2mA) and brightness ratings (8mcd, 1.8mcd) are substantially lower than CMD3350. Forward voltages (10V, 1.9V) require different circuit design. Viewing angles (60°, 50°) exceed narrow-beam requirement.
HLMP-4719, HLMP4719A3R0, HLMP47199MP7 (Broadcom Limited, onsemi, Everlight): Diffused lens transparency and low brightness ratings (2.1mcd, 2mcd) are incompatible with CMD3350 high-brightness specification (150mcd). Operating current 2mA versus 20mA requires circuit redesign. Suitable only for low-brightness indicator applications.
MV5353 (onsemi): Diffused lens transparency and 15mcd brightness are substantially lower than CMD3350. Viewing angle 65° provides wide-beam distribution unsuitable for narrow-angle applications. Obsolete product status.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching CMD3350 regulatory requirements. Active product status (4308H7, HLMP-3850-K0002, MV5352A4R0) ensures long-term availability and supply chain stability compared to obsolete CMD3350.

Frequently Asked Questions (FAQ)

Q1: Can I use MV5352A4R0 as a direct replacement for CMD3350?

A: MV5352A4R0 is functionally compatible but not a direct equivalent. Both parts share identical forward voltage (2.1V vs. 2.2V, within tolerance), current (20mA), and lens size (5mm T-1 3/4). However, MV5352A4R0 brightness is 90mcd compared to CMD3350's 150mcd—a 40% reduction. Use MV5352A4R0 only if your application tolerates reduced brightness output. Circuit design remains unchanged due to matching voltage and current specifications.

Q2: What is the difference between clear and diffused lens transparency?

A: Clear lens transparency provides concentrated light output with narrow viewing angle and high brightness at the center beam axis. Diffused lens transparency scatters light across a wider viewing angle with lower peak brightness but more uniform illumination. CMD3350 uses clear transparency for focused indication. Diffused alternatives (HLMP-4719, MV5353) are unsuitable for applications requiring narrow-beam, high-brightness output.

Q3: Why is 4308H7 recommended over HLMP-3850-K0002?

A: Both parts meet CMD3350 electrical and optical specifications. 4308H7 is preferred because: (1) Same manufacturer (VCC) as CMD3350, ensuring design continuity; (2) Bulk packaging matches original CMD3350 procurement format; (3) Identical forward voltage (2.2V) eliminates circuit tolerance concerns. HLMP-3850-K0002 is equally valid technically but requires Tape & Reel procurement and slightly lower forward voltage (2.1V).

Q4: Can I substitute CMD3350 with a part having different forward voltage?

A: Forward voltage tolerance of ±0.1V is acceptable for circuit compatibility. CMD3350 specifies 2.2V; parts rated 2.1V (HLMP-3850-K0002, MV5352A4R0) operate within tolerance. Parts with significantly different forward voltages (5219284F at 10V, 5219321F at 1.9V, HLMP-4719 at 1.8V) require circuit redesign including new current-limiting resistor values and are not recommended for direct substitution.

Q5: What viewing angle should I consider when selecting a substitute?

A: CMD3350 specifies 24° viewing angle, indicating narrow-beam concentration suitable for focused indication. Substitutes should maintain 24–28° viewing angle for equivalent optical performance. Parts with wider viewing angles (50°, 60°, 65°) provide broader light distribution unsuitable for narrow-beam applications. Viewing angle directly affects brightness perception and application suitability.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching CMD3350 regulatory requirements. This ensures compatibility with modern procurement standards and environmental regulations.

Q7: Why is CMD3350 obsolete, and what does this mean for my design?

A: CMD3350 is classified as obsolete by the manufacturer, indicating discontinued production. Obsolete status means: (1) No new inventory will be manufactured; (2) Existing stock is limited; (3) Long-term availability cannot be guaranteed. Transitioning to active substitute parts (4308H7, HLMP-3850-K0002, MV5352A4R0) ensures design sustainability and supply chain continuity.

Q8: Can I use MV5353 as a substitute for CMD3350?

A: MV5353 is not recommended. Although both are yellow LEDs in T-1 3/4 packages, MV5353 differs significantly: (1) Diffused lens transparency versus CMD3350 clear; (2) 15mcd brightness versus 150mcd—a 90% reduction; (3) 65° viewing angle versus 24°—wide-beam versus narrow-beam; (4) Obsolete product status. MV5353 is suitable only for low-brightness, wide-angle indicator applications, not CMD3350 replacement.

Q9: What is the impact of peak wavelength differences (583nm vs. 585nm)?

A: Peak wavelength differences of 2nm between 583nm and 585nm are imperceptible to human vision and do not affect functional performance. Both wavelengths produce yellow indication within the standard yellow LED spectrum. This parameter variation is acceptable for substitution purposes.

Q10: Should I consider packaging format (bulk vs. Tape & Reel) when selecting a substitute?

A: Packaging format affects procurement and assembly processes but not electrical or optical performance. CMD3350 uses bulk packaging; 4308H7 also uses bulk (preferred for continuity), while HLMP-3850-K0002 uses Tape & Reel. Verify your assembly equipment compatibility and procurement preferences. Tape & Reel packaging is standard for high-volume automated assembly; bulk packaging suits lower-volume or manual assembly operations.

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