VCC 4308H5 LED Green Clear T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The VCC 4308H5 is a green LED indication component featuring a clear lens in T-1 3/4 (5mm) through-hole package. This discrete radial LED operates at 2.3V forward voltage with a 140mcd brightness rating and 24° viewing angle. The component is classified as obsolete, making identification of functionally equivalent substitute parts essential for design continuity and procurement planning. Active alternative models from multiple manufacturers provide comparable or enhanced performance characteristics while maintaining through-hole mounting compatibility and standard radial package configuration.

Key Parameters

Parameter	VCC 4308H5
Color	Green
Lens Transparency	Clear
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) Typical	2.3V
Current - Test	20mA
Millicandela Rating	140mcd
Viewing Angle	24°
Wavelength - Peak	565nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	9.19mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Color: Green
Lens Transparency: Clear
Mounting Type: Through Hole
Package Configuration: Radial, 5mm T-1 3/4 form factor
Test Current: 20mA
Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

Forward Voltage (Vf): Range 2.0V to 3.5V acceptable for standard logic-level circuits
Millicandela Rating: 140mcd to 19,380mcd (brightness variation acceptable based on application requirements)
Viewing Angle: 10° to 30° (application-dependent)
Wavelength - Peak: 515nm to 575nm (green spectrum range)
Height: 8.85mm to 12.25mm (PCB clearance dependent)

Direct Equivalent Category: Parts with Vf ≤ 2.3V and similar brightness profile (CMD-333VGC)

Compatible Substitute Category: Parts with Vf 3.2V to 3.5V, higher brightness, same package and mounting (Broadcom HLMP series, Everlight 333-2SUGC series, CreeLED C503B, Würth 151053GS03000)

Limited Compatibility Category: Parts with significantly different viewing angles or wavelength characteristics (HLMP-4740 diffused lens, 383-2SYGC yellow-green variant)

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	mcd Rating	Viewing Angle	Wavelength Peak	Height (Max)	Lens Transparency	Product Status	Inventory
4308H5	VCC	Green	2.3V	140mcd	24°	565nm	9.19mm	Clear	Obsolete	926 Pcs
CMD-333VGC	VCC	Green	2.1V	250mcd	25.5°	570nm	8.90mm	Clear	Active	621 Pcs
151053GS03000	Würth Elektronik	Green	3.4V	10,000mcd	30°	515nm	8.85mm	Clear	Active	3,432 Pcs
333-2SUGC/C525	Everlight	Green	3.5V	2,000mcd	10°	518nm	8.90mm	Clear	Active	1,036 Pcs
333-2SUGC/S400-A5	Everlight	Green	3.4V	12,500mcd	10°	525nm	8.90mm	Clear	Active	755 Pcs
383-2SYGC/S530-E2	Everlight	Yellow-Green	2.0V	320mcd	10°	575nm	8.90mm	Clear	Active	679 Pcs
7344-15SUGC/S400-A5	Everlight	Green	3.3V	8,000mcd	30°	518nm	8.90mm	Clear	Active	1,145 Pcs
C503B-GCN-CY0C0791	CreeLED	Green	3.2V	19,380mcd	30°	527nm	10.30mm	Clear	Active	1,703 Pcs
HLMP-4740	Broadcom	Green	1.9V	2.3mcd	50°	565nm	9.19mm	Diffused	Active	16,205 Pcs
HLMP-CM3A-Z10DD	Broadcom	Green	3.2V	16,500mcd	30°	516nm	8.90mm	Clear	Active	2,100 Pcs
HLMP-CM3B-Z10DD	Broadcom	Green	3.2V	16,500mcd	30°	516nm	12.25mm	Clear	Active	19,428 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Equivalent (Recommended Primary Substitute):

CMD-333VGC (VCC) is the optimal substitute for the 4308H5. Both components are manufactured by VCC, share identical package configuration (T-1 3/4 radial through-hole), and operate within compatible voltage ranges (2.1V vs. 2.3V). The CMD-333VGC provides enhanced brightness (250mcd vs. 140mcd) while maintaining similar viewing angle (25.5° vs. 24°) and wavelength characteristics (570nm vs. 565nm). Product status is active with 621 units in stock. ROHS3 compliance and MSL rating of 3 (168 hours) are maintained.

Tier 2 - Compatible Substitutes (Higher Brightness, Higher Voltage):

For applications requiring increased brightness and accepting higher forward voltage (3.2V to 3.4V):

HLMP-CM3A-Z10DD and HLMP-CM3B-Z10DD (Broadcom): 16,500mcd brightness, 3.2V Vf, 30° viewing angle, T-1 3/4 package. HLMP-CM3A-Z10DD has standard 8.90mm height; HLMP-CM3B-Z10DD has extended 12.25mm height. Both ROHS3 compliant with MSL 1. High inventory availability (2,100 and 19,428 units respectively).
333-2SUGC/S400-A5 (Everlight): 12,500mcd brightness, 3.4V Vf, 10° narrow viewing angle, 5mm package. ROHS3 compliant, MSL 1. Suitable for applications requiring concentrated light output.
C503B-GCN-CY0C0791 (CreeLED): 19,380mcd brightness, 3.2V Vf, 30° viewing angle, 5mm package. RoHS compliant, MSL 1. Highest brightness option with 1,703 units available. Note: 10.30mm height exceeds original specification.
151053GS03000 (Würth Elektronik): 10,000mcd brightness, 3.4V Vf, 30° viewing angle, 5mm package. WL-TMRW series, ROHS3 compliant, MSL 1. Highest inventory (3,432 units).

Tier 3 - Limited Compatibility (Specialized Applications):

HLMP-4740 (Broadcom): Diffused green lens (not clear), 2.3mcd brightness, 1.9V Vf, 50° wide viewing angle. Suitable only for applications where diffused appearance and wide viewing angle are required. Not recommended as direct substitute due to lens transparency difference.
383-2SYGC/S530-E2 (Everlight): Yellow-green color (573nm wavelength), 2.0V Vf, 320mcd brightness. Color shift makes this unsuitable for applications requiring pure green indication.

Selection Criteria by Application:

Low-voltage logic circuits (≤2.5V supply): CMD-333VGC
Standard 5V circuits with brightness enhancement: HLMP-CM3A-Z10DD, HLMP-CM3B-Z10DD, 333-2SUGC/S400-A5
High-brightness applications: C503B-GCN-CY0C0791, 151053GS03000
PCB height-constrained designs: HLMP-CM3A-Z10DD (8.90mm), 333-2SUGC/C525 (8.90mm)
Wide viewing angle requirement: 7344-15SUGC/S400-A5 (30°), 151053GS03000 (30°)

All recommended substitutes maintain ROHS3 compliance and through-hole radial mounting configuration. Forward voltage differences require circuit design review for current-limiting resistor adjustment.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace VCC 4308H5 with CMD-333VGC without circuit modification?

A: CMD-333VGC is compatible with minimal circuit changes. The forward voltage difference (2.1V vs. 2.3V) is 0.2V, which typically requires only minor adjustment to the current-limiting resistor. Both components operate at 20mA test current and share identical T-1 3/4 package dimensions. Verify your circuit's voltage supply and resistor tolerance to ensure proper LED current (typically 10-20mA for indication applications).

Q2: Why do substitute parts have significantly higher brightness ratings (mcd)?

A: LED technology has advanced since the 4308H5 design. Modern green LEDs achieve higher luminous intensity through improved semiconductor materials and phosphor coatings. Higher mcd ratings do not require circuit changes if your current-limiting resistor maintains the same LED current (20mA). Brightness can be reduced through resistor adjustment if necessary for the application.

Q3: What is the difference between clear and diffused lens transparency?

A: Clear lenses provide focused light output with defined viewing angle and higher brightness concentration. Diffused lenses scatter light over a wider area, reducing peak brightness but increasing visibility from off-axis angles. The 4308H5 has a clear lens; HLMP-4740 has a diffused lens. These are not interchangeable for applications requiring specific light distribution patterns.

Q4: Can I use parts with 3.2V to 3.5V forward voltage in a 2.3V circuit?

A: No. Forward voltage (Vf) is a minimum operating requirement. A 3.2V LED requires at least 3.2V across the LED to conduct current. In a 2.3V circuit, the LED will not illuminate. Conversely, a 2.1V LED (CMD-333VGC) can operate in circuits designed for 2.3V with minor resistor adjustment. Always verify your power supply voltage exceeds the LED's Vf rating.

Q5: What does "T-1 3/4" package designation mean?

A: T-1 3/4 refers to the lens diameter in eighths of an inch. T-1 3/4 = 1.75 eighths = 0.21875 inches ≈ 5.56mm nominal, commonly rounded to 5mm. This is the standard through-hole LED package size. All substitute parts listed maintain this package standard, ensuring mechanical compatibility with existing PCB footprints.

Q6: How do viewing angle differences affect substitution?

A: Viewing angle defines the cone of light output. The 4308H5 has 24° viewing angle; substitutes range from 10° (narrow, concentrated) to 50° (wide, diffused). For indicator applications, 24° to 30° viewing angles are functionally equivalent. Narrow 10° angles concentrate light for specific viewing positions. Wide 50° angles (HLMP-4740) suit applications requiring visibility from multiple angles. Select based on your application's viewing geometry.

Q7: What is RoHS3 compliance and why does it matter?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) restricts lead, cadmium, mercury, and other hazardous materials in electronic components. All recommended substitutes are ROHS3 compliant, ensuring regulatory compliance for products sold in EU markets and meeting environmental standards. The 4308H5 is also ROHS3 compliant, so substitutes maintain this certification level.

Q8: What is MSL (Moisture Sensitivity Level) and how does it affect storage?

A: MSL indicates how sensitive a component is to moisture absorption during storage. MSL 1 (unlimited shelf life) components can be stored indefinitely. MSL 3 (168 hours) components must be used within 168 hours of opening the moisture barrier bag. The 4308H5 has MSL 1; CMD-333VGC has MSL 3. For long-term inventory, MSL 1 parts (most substitutes) are preferred.

Q9: Why is the 4308H5 classified as obsolete?

A: Obsolete status indicates the manufacturer (VCC) has discontinued production. Existing inventory (926 units) is available but will eventually deplete. Substitution planning is necessary for long-term design continuity. Active alternatives from Broadcom, Everlight, CreeLED, and Würth Elektronik provide equivalent or superior performance with ongoing manufacturing support.

Q10: Which substitute offers the best balance of compatibility and availability?

A: HLMP-CM3B-Z10DD (Broadcom) offers optimal balance: 19,428 units in stock (highest availability), 3.2V Vf (standard for modern circuits), 16,500mcd brightness (significant improvement), 30° viewing angle (compatible with 24° original), T-1 3/4 package (identical form factor), ROHS3 compliant, and MSL 1 (unlimited storage). Extended 12.25mm height requires PCB clearance verification. For height-constrained designs, HLMP-CM3A-Z10DD (8.90mm) is identical except for height.

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