WP63SRD LED Red Diffused T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The WP63SRD is a red diffused 5mm through-hole LED manufactured by Kingbright, designed for general indication applications. This component features a 640nm dominant wavelength with 100mcd brightness rating and 1.85V forward voltage. The WP63SRD is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with through-hole mounting, red diffused lens characteristics, and similar electrical performance parameters within acceptable tolerances.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Color	Red	-	Critical
Lens Transparency	Diffused	-	Critical
Mounting Type	Through Hole	-	Critical
Lens Size	5mm, T-1 3/4	-	Critical
Voltage - Forward (Vf) Typical	1.85V	V	High
Current - Test	20mA	mA	High
Millicandela Rating	100mcd	mcd	Medium
Viewing Angle	60°	degrees	Medium
Wavelength - Dominant	640nm	nm	Medium
Package / Case	Radial	-	Critical
RoHS Status	ROHS3 Compliant	-	High

Substitute Part Grouping Explanation

Substitution logic for the WP63SRD is based on strict alignment with the following critical parameters:

Critical Parameters (Must Match):

Color: Red
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial
Lens Style: Round with Domed Top

High Priority Parameters (Acceptable Tolerance Range):

Voltage - Forward (Vf): 1.85V ±0.15V (acceptable range 1.70V to 2.00V)
Current - Test: 20mA (standard test condition)
RoHS Compliance: ROHS3 Compliant

Medium Priority Parameters (Functional Equivalence):

Millicandela Rating: 100mcd baseline (range 26mcd to 500mcd acceptable depending on application)
Viewing Angle: 60° baseline (range 40° to 65° acceptable)
Wavelength - Dominant: 640nm baseline (range 624nm to 640nm acceptable for red indication)

Substitute parts are grouped into two categories based on lens size compatibility:

Group 1: 5mm T-1 3/4 Lens Size (Direct Mechanical Compatibility)

HLMP-EG55-JK0DU (Broadcom)
HLMP-EG55-GK0DD (Broadcom)
HLMP-EG55-HJ000 (Broadcom)
HLMP-WG02 (Broadcom)

Group 2: Alternative 5mm Lens Sizes (Mechanical Verification Required)

1383-2SURD/S530-A3 (Everlight, 5.00mm Dia)
7343-2SURD/S530-A3 (Everlight, 4.60mm Dia)

Parameter Comparison

Parameter	WP63SRD (Main)	1383-2SURD/S530-A3	7343-2SURD/S530-A3	HLMP-EG55-GK0DD	HLMP-EG55-HJ000	HLMP-EG55-JK0DU	HLMP-WG02
Manufacturer	Kingbright	Everlight	Everlight	Broadcom	Broadcom	Broadcom	Broadcom
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Color	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	5mm, T-1 3/4	5.00mm Dia	4.60mm Dia	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4
Voltage - Forward (Vf) Typ	1.85V	2V	2V	1.9V	1.9V	1.9V	1.9V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	100mcd	500mcd	320mcd	270mcd	245mcd	320mcd	26mcd
Viewing Angle	60°	40°	40°	55°	55°	55°	65°
Wavelength - Dominant	640nm	624nm	624nm	626nm	626nm	626nm	-
Wavelength - Peak	655nm	632nm	632nm	635nm	635nm	635nm	635nm
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
Height (Max)	6.00mm	8.90mm	8.90mm	8.91mm	8.91mm	8.91mm	8.91mm
RoHS Status	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	Not specified	Not specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2A (4 Weeks)
Inventory Status	617 Pcs	710 Pcs	1038 Pcs	818 Pcs	855 Pcs	1161 Pcs	15922 Pcs

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The Broadcom HLMP-EG55 series parts (HLMP-EG55-JK0DU, HLMP-EG55-GK0DD, HLMP-EG55-HJ000) provide the closest electrical and mechanical compatibility to the WP63SRD. These parts maintain identical lens size (5mm T-1 3/4), forward voltage within 0.05V tolerance (1.9V vs 1.85V), ROHS3 compliance, and unlimited moisture sensitivity rating. The HLMP-EG55-JK0DU offers the highest brightness (320mcd) among this group, while HLMP-EG55-HJ000 provides the lowest brightness (245mcd). All three maintain 55° viewing angle, which is within acceptable tolerance of the original 60°.

Secondary Substitutes (Acceptable with Verification):

The Everlight 1383-2SURD/S530-A3 and 7343-2SURD/S530-A3 are functionally equivalent but require mechanical verification. Both feature 5mm lens diameter and diffused red characteristics. The 1383-2SURD/S530-A3 maintains 5.00mm diameter matching the original specification, while the 7343-2SURD/S530-A3 is slightly smaller at 4.60mm diameter. Both operate at 2V forward voltage (0.15V higher than original) and feature narrower 40° viewing angle. RoHS compliance status is not specified for these parts.

Alternative for Low-Brightness Applications:

The Broadcom HLMP-WG02 is suitable only for applications where reduced brightness (26mcd) is acceptable. This part maintains identical lens size and forward voltage but features a wider 65° viewing angle and MSL rating of 2A (4 weeks), indicating higher moisture sensitivity compared to the original MSL 1 rating.

Compliance Considerations:

All recommended primary substitutes (Broadcom HLMP-EG55 series) maintain ROHS3 compliance and unlimited moisture sensitivity, matching the original WP63SRD specifications. The HLMP-WG02 introduces MSL 2A classification, requiring controlled storage conditions. Everlight parts do not specify RoHS or MSL ratings in provided data.

Frequently Asked Questions (FAQ)

Q1: Can I use HLMP-EG55-JK0DU as a direct replacement for WP63SRD?

A: Yes. The HLMP-EG55-JK0DU is a direct mechanical and electrical substitute. Both parts feature 5mm T-1 3/4 lens size, radial through-hole mounting, red diffused lens, and forward voltage within acceptable tolerance (1.9V vs 1.85V). The HLMP-EG55-JK0DU provides higher brightness (320mcd vs 100mcd) and slightly narrower viewing angle (55° vs 60°), which are acceptable variations for indication applications.

Q2: What is the difference between the three Broadcom HLMP-EG55 variants?

A: The three Broadcom HLMP-EG55 variants differ primarily in brightness rating and packaging. HLMP-EG55-JK0DU provides 320mcd in bulk packaging, HLMP-EG55-GK0DD provides 270mcd in tape & box packaging, and HLMP-EG55-HJ000 provides 245mcd in bulk packaging. All three share identical lens size, forward voltage, viewing angle, and compliance ratings. Selection depends on required brightness level and packaging preference.

Q3: Why is the height of substitute parts greater than the original WP63SRD?

A: The WP63SRD has a maximum height of 6.00mm, while all substitute parts measure 8.90mm to 8.91mm. This difference reflects manufacturing variations between manufacturers. Verify that the increased height is compatible with your PCB layout and enclosure design before substitution.

Q4: Can I use Everlight parts as substitutes?

A: The Everlight 1383-2SURD/S530-A3 and 7343-2SURD/S530-A3 are functionally equivalent but require verification. Both operate at 2V forward voltage (0.15V higher than original), feature narrower 40° viewing angle, and do not specify RoHS compliance status. The 7343-2SURD/S530-A3 has a smaller lens diameter (4.60mm vs 5.00mm), which may affect mechanical fit. Verify circuit design tolerance for the higher forward voltage and confirm RoHS compliance requirements before use.

Q5: What does the forward voltage difference mean for circuit design?

A: The WP63SRD operates at 1.85V forward voltage, while most substitutes operate at 1.9V to 2.0V. This 0.05V to 0.15V difference affects current-limiting resistor calculations. For a 5V supply with 20mA target current, the original design uses approximately 157Ω resistor, while substitutes require approximately 150Ω to 155Ω. Recalculate resistor values based on your specific supply voltage and desired current.

Q6: Is the HLMP-WG02 suitable for my application?

A: The HLMP-WG02 is suitable only if your application accepts significantly reduced brightness (26mcd vs 100mcd original). This part features wider viewing angle (65°) and higher moisture sensitivity (MSL 2A, 4 weeks storage limit). Use only if brightness reduction is acceptable and storage conditions can be controlled.

Q7: What are the compliance implications of substitution?

A: All recommended Broadcom HLMP-EG55 series substitutes maintain ROHS3 compliance and unlimited moisture sensitivity (MSL 1), matching the original WP63SRD. The HLMP-WG02 introduces MSL 2A classification, requiring controlled storage. Everlight parts do not specify compliance ratings in available data. Verify compliance requirements for your application before final selection.

Q8: Can I mix different substitute parts in the same design?

A: Mixing different substitute parts is not recommended for consistency. If multiple LEDs are used in a single application, maintain uniform brightness and viewing angle by using the same part number. Mixing parts with different brightness ratings (26mcd to 500mcd range) or viewing angles (40° to 65° range) creates inconsistent visual indication performance.

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