LED YELLOW CLEAR T-1 T/H 4318F7 Equivalent & Substitute Parts

Part Overview

The Visual Communications Company (VCC) 4318F7 is a yellow LED indication component with a 3mm T-1 through-hole package, rated at 2.2V forward voltage and 85mcd brightness. This part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. The 4318F7 operates at 20mA test current with a 45° viewing angle and clear domed lens configuration suitable for standard indicator applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	4318F7
Manufacturer	Visual Communications Company (VCC)
Color	Yellow
Lens Transparency	Clear
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.2V
Current - Test	20mA
Millicandela Rating	85mcd
Viewing Angle	45°
Mounting Type	Through Hole
Wavelength - Peak	583nm
Package / Case	Radial
Supplier Device Package	T-1
Height (Max)	6.37mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the 4318F7 is determined by the following critical parameters:

Primary Compatibility Criteria:

Color: Yellow
Lens Transparency: Clear
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Current - Test: 20mA
Voltage - Forward (Vf): 2.0V to 2.2V range
Viewing Angle: 30° to 45° range

Secondary Compatibility Criteria:

Millicandela Rating: 85mcd minimum
Wavelength - Peak: 583nm to 591nm range
Height (Max): Within mechanical envelope constraints
RoHS Status: ROHS3 Compliant
Product Status: Active preferred for long-term availability

Substitute parts are grouped into two categories:

Category A - Yellow LED Direct Substitutes: Parts matching yellow color, clear lens, 3mm T-1 package, and forward voltage within 2.0V to 2.2V range. These include OVLBY4C7, SSL-LX3044SYC, WP710A10SYC, WP710A10SYC/J3, WP710A10SYCK, and 264-7UYC/S400-A9.

Category B - Orange LED Functional Alternatives: Parts with orange color, clear lens, 3mm T-1 package, and forward voltage of 2.0V to 2.2V. These include SSL-LX3044SOC and WP710A10SEC. Orange LEDs operate at similar electrical parameters but produce different spectral output (600nm to 620nm range) and are suitable only where color differentiation is acceptable.

Parameter Comparison

Parameter	4318F7 (Main)	264-7UYC/S400-A9	OVLBY4C7	SSL-LX3044SYC	WP710A10SYC	WP710A10SYC/J3	WP710A10SYCK
Manufacturer	VCC	Everlight Electronics	TT Electronics/Optek	Lumex Opto/Components	Kingbright	Kingbright	Kingbright
Color	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow
Lens Transparency	Clear	Clear	Clear	Clear	Clear	Clear	Clear
Lens Size	3mm, T-1	2.90mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.2V	2V	2V	2.1V	2V	2V	2V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	85mcd	800mcd	3700mcd	1000mcd	1200mcd	2800mcd	1300mcd
Viewing Angle	45°	40°	45°	30°	34°	34°	34°
Wavelength - Peak	583nm	591nm	—	590nm	590nm	590nm	590nm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Supplier Device Package	T-1	3.0mm Round	3mm	T-1	T-1	T-1	T-1
Height (Max)	6.37mm	6.20mm	5.35mm	4.60mm	5.90mm	5.90mm	5.90mm
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

The following parts are recommended as direct substitutes for the 4318F7 based on matching color, lens configuration, package type, and electrical parameters within acceptable tolerance:

WP710A10SYC (Kingbright) - Preferred substitute. Active product status ensures long-term availability. Forward voltage of 2V is within acceptable range of the 2.2V specification. Millicandela rating of 1200mcd exceeds the 85mcd requirement. Viewing angle of 34° is compatible with the 45° specification. Height of 5.90mm is within mechanical envelope. ROHS3 compliant with MSL 1 rating provides superior moisture protection compared to the obsolete part.

OVLBY4C7 (TT Electronics/Optek Technology) - Alternative substitute. Active product status with highest inventory availability (31,212 pcs). Forward voltage of 2V is compatible. Millicandela rating of 3700mcd significantly exceeds requirement. Viewing angle of 45° matches the original specification exactly. Height of 5.35mm is within envelope. ROHS3 compliant with MSL 1 rating.

WP710A10SYC/J3 (Kingbright) - Alternative substitute. Active product status. Forward voltage of 2V is compatible. Millicandela rating of 2800mcd exceeds requirement. Viewing angle of 34° is compatible. Height of 5.90mm is within envelope. ROHS3 compliant with MSL 1 rating.

SSL-LX3044SYC (Lumex Opto/Components Inc.) - Alternative substitute. Active product status. Forward voltage of 2.1V is within acceptable range. Millicandela rating of 1000mcd exceeds requirement. Viewing angle of 30° is narrower than original but compatible for most applications. Height of 4.60mm is within envelope. ROHS3 compliant with MSL 1 rating.

264-7UYC/S400-A9 (Everlight Electronics Co Ltd) - Alternative substitute. Active product status. Forward voltage of 2V is compatible. Millicandela rating of 800mcd exceeds requirement. Viewing angle of 40° is compatible with 45° specification. Height of 6.20mm is within envelope. ROHS3 compliant with MSL 1 rating.

WP710A10SYCK (Kingbright) - Alternative substitute. Active product status. Forward voltage of 2V is compatible. Millicandela rating of 1300mcd exceeds requirement. Viewing angle of 34° is compatible. Height of 5.90mm is within envelope. ROHS3 compliant with MSL 1 rating.

Secondary Substitutes for Functional Alternatives:

Orange LED substitutes SSL-LX3044SOC and WP710A10SEC are electrically compatible but produce different spectral output. These are suitable only where color differentiation from yellow is acceptable in the application.

SSL-LX3044SOC (Lumex Opto/Components Inc.) - Orange alternative. Active product status. Forward voltage of 2V is compatible. Millicandela rating of 1000mcd exceeds requirement. Viewing angle of 30° is narrower. Height of 4.60mm is within envelope. ROHS3 compliant with MSL 1 rating.

WP710A10SEC (Kingbright) - Orange alternative. Active product status. Forward voltage of 2V is compatible. Millicandela rating of 800mcd exceeds requirement. Viewing angle of 34° is compatible. Height of 5.90mm is within envelope. ROHS3 compliant with MSL 1 rating.

WP710A10SECK/J4 (Kingbright) - Orange alternative. Active product status. Forward voltage of 2.2V matches original specification exactly. Millicandela rating of 3000mcd significantly exceeds requirement. Viewing angle of 34° is compatible. Height of 5.90mm is within envelope. ROHS3 compliant with MSL 1 rating.

All recommended substitutes are ROHS3 compliant and carry EAR99 ECCN classification matching the original part. All substitute parts have active product status, ensuring continued availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the 4318F7 be directly replaced with any of the yellow LED substitutes?

A: Yes. All yellow LED substitutes listed (WP710A10SYC, OVLBY4C7, WP710A10SYC/J3, SSL-LX3044SYC, 264-7UYC/S400-A9, and WP710A10SYCK) share the same color, lens transparency, package type, and electrical operating parameters within acceptable tolerance. Forward voltage ranges from 2.0V to 2.1V, which is compatible with the 2.2V specification. All operate at 20mA test current and are rated for through-hole mounting in radial configuration.

Q: What is the primary difference between the 4318F7 and its yellow LED substitutes?

A: The main difference is product status. The 4318F7 is obsolete, while all yellow substitutes are active products with ongoing manufacturing and supply availability. Additionally, substitute parts have higher millicandela ratings (800mcd to 3700mcd) compared to the original 85mcd, providing greater brightness. Substitute parts also feature improved moisture sensitivity ratings (MSL 1 vs. MSL 2), offering better long-term reliability in humid environments.

Q: Are the orange LED substitutes compatible with the 4318F7?

A: Orange LED substitutes (SSL-LX3044SOC, WP710A10SEC, and WP710A10SECK/J4) are electrically compatible and share the same package, mounting type, and electrical operating parameters. However, they produce different spectral output in the 600nm to 620nm range compared to the yellow 583nm to 591nm range. These are suitable only for applications where color differentiation is acceptable or where orange indication is functionally equivalent to yellow.

Q: What are the key electrical parameters to verify when substituting the 4318F7?

A: The critical electrical parameters are forward voltage (Vf), test current, and wavelength. The 4318F7 operates at 2.2V forward voltage with 20mA test current and 583nm peak wavelength. All yellow substitutes operate at 2.0V to 2.1V forward voltage with 20mA test current and 590nm to 591nm peak wavelength. These parameters are within acceptable tolerance for direct substitution. Verify that the circuit design accommodates the lower forward voltage of substitute parts (0.1V to 0.2V lower than original).

Q: Do the substitute parts fit within the same mechanical envelope as the 4318F7?

A: The 4318F7 has a maximum height of 6.37mm. All yellow LED substitutes have maximum heights ranging from 4.60mm to 6.20mm, which are within or below the original envelope. The 264-7UYC/S400-A9 has a height of 6.20mm, which is 0.17mm shorter than the original. All substitute parts use the same 3mm T-1 lens size and radial package configuration, ensuring compatibility with standard through-hole PCB layouts.

Q: What is the viewing angle difference between the 4318F7 and its substitutes?

A: The 4318F7 has a 45° viewing angle. Yellow substitutes have viewing angles ranging from 30° to 45°. OVLBY4C7 matches the original 45° specification exactly. WP710A10SYC, WP710A10SYC/J3, WP710A10SYCK, and 264-7UYC/S400-A9 have viewing angles between 34° and 40°, which are narrower but compatible for most indicator applications. SSL-LX3044SYC has a 30° viewing angle, which is the narrowest option and suitable for applications requiring more directional indication.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All yellow and orange LED substitutes listed are ROHS3 compliant, matching the compliance status of the original 4318F7. All parts carry EAR99 ECCN classification and are classified under HTSUS code 8541.41.0000.

Q: What is the moisture sensitivity level (MSL) difference?

A: The 4318F7 has MSL 2 rating with a 1-year shelf life. All substitute parts have MSL 1 rating with unlimited shelf life. MSL 1 provides superior moisture protection and longer storage capability without requiring special handling or baking procedures before soldering.

Q: Which substitute offers the best brightness match to the 4318F7?

A: The 4318F7 is rated at 85mcd. Among yellow substitutes, SSL-LX3044SYC and 264-7UYC/S400-A9 offer the closest brightness levels at 1000mcd and 800mcd respectively, representing approximately 10x to 12x higher brightness. If exact brightness matching is critical, circuit design modifications (such as current limiting resistor adjustment) may be necessary to reduce LED brightness to original levels.

Q: Can I use WP710A10SYCK as a substitute if brightness is not a concern?

A: Yes. WP710A10SYCK is a direct yellow LED substitute with 1300mcd brightness, 2V forward voltage, 20mA test current, 34° viewing angle, and 5.90mm maximum height. It is ROHS3 compliant with MSL 1 rating and active product status. The higher brightness is not detrimental if the application does not require specific brightness control.

Q: What is the difference between WP710A10SYC, WP710A10SYC/J3, and WP710A10SYCK?

A: All three are Kingbright yellow LED substitutes with identical electrical parameters (2V forward voltage, 20mA test current, 590nm wavelength, 34° viewing angle, 5.90mm height). The primary difference is millicandela rating: WP710A10SYC is 1200mcd, WP710A10SYC/J3 is 2800mcd, and WP710A10SYCK is 1300mcd. The part number suffix indicates different brightness grades. Select based on required brightness level for the application.

Q: Is SSL-LX3044SYC suitable if the application requires a narrower viewing angle?

A: Yes. SSL-LX3044SYC has a 30° viewing angle, which is narrower than the original 45° specification. This is suitable for applications requiring more directional indication or where ambient light interference needs to be minimized. The 30° viewing angle provides more focused light output compared to the original 45° specification.

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