WP63GD Equivalent & Substitute Parts

Part Overview

The Kingbright WP63GD is an active green diffused LED indicator in T-1 3/4 through-hole package, designed for discrete indication applications. This 5mm round domed lens LED operates at 2.2V forward voltage with 16mcd brightness output at 20mA test current and 568nm dominant wavelength. The component is RoHS3 compliant and REACH unaffected, with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation within alternative electrical and mechanical parameters while maintaining functional compatibility in indication circuits.

Key Parameters

Parameter	WP63GD Value	Substitution Relevance
Color	Green	Critical - must match
Lens Transparency	Diffused	Critical - must match
Lens Size	5mm, T-1 3/4	Critical - mechanical fit
Mounting Type	Through Hole Radial	Critical - PCB compatibility
Voltage - Forward (Vf)	2.2V	Important - circuit design dependent
Current - Test	20mA	Important - operating point reference
Millicandela Rating	16mcd	Important - brightness level
Viewing Angle	60°	Application dependent
Wavelength - Peak	565nm	Application dependent
RoHS Status	ROHS3 Compliant	Regulatory requirement

Substitute Part Grouping Explanation

Substitution logic for the WP63GD is based on the following critical parameters:

Mandatory Matching Parameters:

Color: Green
Lens Transparency: Diffused
Mounting Type: Through Hole Radial
Lens Size: 5mm T-1 3/4 package
RoHS3 Compliance

Flexible Parameters (within acceptable design tolerance):

Voltage - Forward (Vf): Range 2.1V to 2.2V acceptable for most indication circuits
Current - Test: 10mA to 20mA operating range
Millicandela Rating: 6.7mcd to 180mcd depending on application brightness requirements
Viewing Angle: 36° to 60° depending on application field of view requirements
Wavelength - Peak: 565nm to 575nm within green spectrum

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (Vf 2.1V-2.2V, 20mA test current): Parts with matching forward voltage and test current specifications, suitable for direct circuit replacement with minimal design modification.

Category B - Compatible Alternatives (Vf 2.1V, variable test current): Parts with slightly lower forward voltage or different test current ratings, requiring circuit verification but mechanically and functionally compatible.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Size	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Height (Max)	RoHS Status
WP63GD	Kingbright	Green	5mm, T-1 3/4	2.2V	20mA	16mcd	60°	565nm	6.00mm	ROHS3
151051VS04000	Würth Elektronik	Green	4.90mm Dia	2.1V	20mA	140mcd	40°	573nm	8.95mm	ROHS3
5219674F	Dialight	Green	4.75mm Dia	2.1V	20mA	40mcd	60°	565nm	8.21mm	ROHS3
HLMP-3554	Broadcom Limited	Green	5mm, T-1 3/4	2.1V	10mA	6.7mcd	50°	565nm	6.35mm	ROHS3
HLMP-3680	Broadcom Limited	Green	5mm, T-1 3/4	5V	10mA	1.6mcd	60°	565nm	9.19mm	ROHS3
HLMP-3680-B00B2	Broadcom Limited	Green	Not specified	5V	10mA	1.6mcd	60°	565nm	Not specified	ROHS3
LTL-307G	Lite-On Inc.	Green	5.00mm Dia	2.1V	20mA	19mcd	50°	565nm	8.60mm	ROHS3
LTL-4233	Lite-On Inc.	Green	5mm, T-1 3/4	2.1V	10mA	19mcd	36°	565nm	8.60mm	ROHS3
LTL2R3KG	Lite-On Inc.	Green	5mm, T-1 3/4	2.1V	20mA	180mcd	40°	575nm	8.70mm	ROHS3
SSL-LX5063GD	Lumex Opto/Components Inc.	Green	5mm, T-1 3/4	2.2V	20mA	30mcd	60°	565nm	6.00mm	ROHS3
SSL-LX5093GD	Lumex Opto/Components Inc.	Green	5mm, T-1 3/4	2.2V	20mA	30mcd	60°	565nm	8.60mm	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

SSL-LX5063GD and SSL-LX5093GD (Lumex Opto/Components Inc.) are the closest electrical equivalents to the WP63GD. Both parts share identical forward voltage (2.2V), test current (20mA), viewing angle (60°), and peak wavelength (565nm). The primary difference is physical height: SSL-LX5063GD matches the WP63GD height at 6.00mm, while SSL-LX5093GD is 8.60mm. Both are RoHS3 compliant and REACH unaffected. Selection between these two depends on available PCB clearance.

Secondary Substitutes (Electrical Compatibility with Design Consideration):

LTL-307G (Lite-On Inc.) operates at 2.1V forward voltage with 20mA test current, matching the WP63GD current specification. The 19mcd brightness is slightly higher than the WP63GD 16mcd rating. This part is suitable for applications where the 0.1V forward voltage difference is acceptable within circuit design margins. RoHS3 compliant.

5219674F (Dialight) provides 2.1V forward voltage at 20mA test current with 40mcd brightness. The 60° viewing angle matches the WP63GD specification. This part is suitable for applications requiring higher brightness output. RoHS3 compliant.

Conditional Substitutes (Application-Specific Evaluation Required):

LTL-4233 (Lite-On Inc.) operates at 2.1V with reduced test current of 10mA and 19mcd brightness. The narrower 36° viewing angle differs from the WP63GD 60° specification. This part is suitable only for applications where the narrower viewing angle is acceptable and lower operating current is beneficial. RoHS3 compliant.

HLMP-3554 (Broadcom Limited) operates at 2.1V with 10mA test current and significantly lower 6.7mcd brightness. This part is suitable only for low-brightness indication applications. RoHS3 compliant.

Not Recommended for Direct Substitution:

HLMP-3680 and HLMP-3680-B00B2 (Broadcom Limited) operate at 5V forward voltage, which is incompatible with the WP63GD 2.2V circuit design. These parts require complete circuit redesign and are not suitable as direct substitutes.

151051VS04000 (Würth Elektronik) and LTL2R3KG (Lite-On Inc.) have lens sizes that deviate from the standard 5mm T-1 3/4 specification, creating potential mechanical fit issues in standard LED mounting holes.

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status consistent with the WP63GD.

Frequently Asked Questions (FAQ)

Q: Can I substitute the WP63GD with any green diffused LED?

A: No. Substitution requires matching the critical parameters: green color, diffused lens transparency, 5mm T-1 3/4 lens size, and through-hole radial mounting. Additionally, forward voltage must be within the acceptable range for your circuit design (2.1V to 2.2V for most applications).

Q: What is the difference between SSL-LX5063GD and SSL-LX5093GD?

A: Both parts are electrically identical to the WP63GD with matching 2.2V forward voltage, 20mA test current, 30mcd brightness, and 60° viewing angle. The only difference is physical height: SSL-LX5063GD is 6.00mm (matching WP63GD), while SSL-LX5093GD is 8.60mm. Selection depends on available PCB clearance in your application.

Q: Can I use a 2.1V LED as a substitute for the 2.2V WP63GD?

A: Yes, in most indication circuit applications. The 0.1V difference is typically within acceptable design margins for LED indicator circuits. However, verify that your circuit design accommodates this voltage variation. Parts like LTL-307G and 5219674F operate at 2.1V and are suitable substitutes.

Q: Why is the HLMP-3680 not recommended as a substitute?

A: The HLMP-3680 operates at 5V forward voltage, compared to the WP63GD 2.2V specification. This 2.8V difference requires complete circuit redesign and cannot be accommodated as a direct substitute in existing 2.2V LED indicator circuits.

Q: Does the millicandela rating affect substitution compatibility?

A: The millicandela rating determines brightness output and is application-dependent. If your application requires specific brightness levels, select a substitute with comparable mcd rating. The WP63GD 16mcd can be substituted with parts ranging from 6.7mcd (lower brightness) to 180mcd (higher brightness) depending on your indication requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant, matching the WP63GD regulatory status. All are also REACH unaffected.

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

A: The WP63GD has a 60° viewing angle. Substitutes with 50° to 60° viewing angles (such as LTL-307G, 5219674F, and SSL-LX5063GD) are directly compatible. Parts with narrower viewing angles (36° to 40°) are suitable only if your application does not require wide-angle visibility.

Q: Can I use the Würth Elektronik 151051VS04000 as a substitute?

A: The 151051VS04000 has a lens diameter of 4.90mm, which deviates from the standard 5mm specification. This may create mechanical fit issues in standard 5mm LED mounting holes. Additionally, the 40° viewing angle is narrower than the WP63GD 60° specification. This part is not recommended for direct substitution.

Q: What is the difference between test current and operating current?

A: Test current (specified at 10mA or 20mA) is the reference condition at which brightness and other optical parameters are measured. Operating current is the actual current your circuit supplies to the LED. Substitutes with different test current ratings may have different brightness characteristics at the same operating current. Verify brightness output at your actual operating current when selecting substitutes with different test current specifications.

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