WP1503SRC/E LED Red Clear T-1 3/4 Through-Hole Equivalent & Substitute Parts

Part Overview

The Kingbright WP1503SRC/E is a red 640nm LED indication component in T-1 3/4 (5mm) through-hole radial package configuration. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. The WP1503SRC/E delivers 5000mcd at 1.85V forward voltage with a 30° viewing angle, suitable for standard indication applications requiring discrete red LED functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	WP1503SRC/E
Manufacturer	Kingbright
Product Status	Obsolete
Color	Red
Lens Size	5mm, T-1 3/4
Lens Style	Round with Domed Top
Lens Transparency	Clear
Mounting Type	Through Hole
Package / Case	Radial
Voltage - Forward (Vf) (Typ)	1.85V
Current - Test	20mA
Millicandela Rating	5000mcd
Wavelength - Dominant	640nm
Wavelength - Peak	660nm
Viewing Angle	30°
Height (Max)	8.60mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the WP1503SRC/E is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

Lens Size: 5mm, T-1 3/4 form factor
Mounting Type: Through Hole radial configuration
Color: Red
Lens Style: Round with Domed Top
Lens Transparency: Clear
Package / Case: Radial

Secondary Compatibility Parameters:

Voltage - Forward (Vf): Range 1.85V to 2.1V (acceptable tolerance for standard indication circuits)
Current - Test: 20mA (standard test condition)
Viewing Angle: 30° (primary specification); 8° variants acceptable for narrow-angle applications
Wavelength - Dominant: 623nm to 640nm (red spectrum range)
RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited)

Non-Substitutable Parameters:

Millicandela Rating: Varies by substitute (2780mcd to 18150mcd); selection depends on application brightness requirements
Height (Max): Acceptable range 8.60mm to 8.91mm for standard PCB layouts

All identified substitute parts maintain through-hole radial package compatibility, red LED indication functionality, and regulatory compliance (RoHS3, REACH Unaffected, EAR99 ECCN classification).

Parameter Comparison

Part Number	Manufacturer	Product Status	Vf (Typ)	Millicandela	Wavelength - Dominant	Viewing Angle	Height (Max)	Inventory
WP1503SRC/E	Kingbright	Obsolete	1.85V	5000mcd	640nm	30°	8.60mm	1092 Pcs
WP1503SRC/J4	Kingbright	Active	2.1V	3000mcd	640nm	30°	8.60mm	1439 Pcs
151053RS03000	Würth Elektronik	Active	1.9V	5000mcd	623nm	30°	8.85mm	3100 Pcs
383-2SDRC/S530-A4	Everlight Electronics Co Ltd	Active	2V	2780mcd	639nm	6°	8.90mm	788 Pcs
383-2SURC/S530-A6	Everlight Electronics Co Ltd	Active	2V	6300mcd	624nm	6°	8.90mm	906 Pcs
7343-2USRC/S1060	Everlight Electronics Co Ltd	Active	2V	4000mcd	631nm	30°	8.85mm	1035 Pcs
HLMP-EG08-VY000	Broadcom Limited	Active	1.9V	8100mcd	626nm	8°	8.91mm	696 Pcs
HLMP-EG08-WZ000	Broadcom Limited	Active	1.9V	10750mcd	626nm	8°	8.91mm	1461 Pcs
HLMP-EG08-WZ0DD	Broadcom Limited	Active	1.9V	10750mcd	626nm	8°	8.91mm	664 Pcs
HLMP-EG08-X1000	Broadcom Limited	Active	1.9V	14100mcd	626nm	8°	8.91mm	13676 Pcs
HLMP-EG08-Y2000	Broadcom Limited	Active	1.9V	18150mcd	626nm	8°	8.91mm	18832 Pcs

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement (30° Viewing Angle):

For applications requiring the original 30° viewing angle specification, the following active parts provide direct functional equivalence:

WP1503SRC/J4 (Kingbright): Same manufacturer, same lens size and viewing angle. Forward voltage increases from 1.85V to 2.1V; brightness reduces from 5000mcd to 3000mcd. Suitable for circuits with voltage tolerance and where reduced brightness is acceptable.
151053RS03000 (Würth Elektronik, WL-TMRW Series): Closest electrical match with 1.9V forward voltage and 5000mcd brightness. Wavelength shifts from 640nm to 623nm (within red spectrum). Height increases marginally from 8.60mm to 8.85mm. RoHS3 compliant, MSL 1, REACH Unaffected.
7343-2USRC/S1060 (Everlight Electronics Co Ltd): Maintains 30° viewing angle with 2V forward voltage and 4000mcd brightness. Wavelength at 631nm. Height 8.85mm. RoHS3 compliant, MSL 1.

Secondary Recommendation - Narrow-Angle Variants (8° Viewing Angle):

For applications where narrow-angle directional indication is acceptable or preferred:

HLMP-EG08 Series (Broadcom Limited): Multiple brightness options (8100mcd to 18150mcd) with consistent 1.9V forward voltage and 626nm wavelength. All variants feature 8° narrow viewing angle, suitable for focused indication requirements. Available in bulk and tape & box packaging. RoHS3 compliant, MSL 1, REACH Unaffected.

Selection Criteria by Application:

Brightness-Critical Applications: Select HLMP-EG08-Y2000 (18150mcd) or HLMP-EG08-X1000 (14100mcd) for maximum luminous intensity.
Voltage-Sensitive Circuits: Prioritize 151053RS03000 (1.9V) or HLMP-EG08 series (1.9V) to minimize forward voltage deviation from original 1.85V specification.
Wide-Angle Indication: Maintain 30° viewing angle with WP1503SRC/J4, 151053RS03000, or 7343-2USRC/S1060.
Procurement Continuity: All substitute parts carry Active product status with established inventory levels, ensuring long-term availability.

All recommended substitutes maintain RoHS3 compliance, MSL 1 moisture sensitivity, and REACH Unaffected regulatory status consistent with the original WP1503SRC/E specification.

Frequently Asked Questions (FAQ)

Q1: Can HLMP-EG08 series parts directly replace WP1503SRC/E in existing PCB layouts?

A: HLMP-EG08 series parts are mechanically compatible (5mm T-1 3/4 through-hole radial package) and electrically compatible (1.9V forward voltage, 20mA test current). However, the 8° narrow viewing angle differs from the original 30° specification. Verify application requirements for viewing angle tolerance before substitution. Height variation (8.91mm vs. 8.60mm) is within standard PCB clearance tolerances.

Q2: What is the forward voltage tolerance range for acceptable substitution?

A: The original WP1503SRC/E operates at 1.85V. Substitute parts range from 1.9V to 2.1V. This 0.05V to 0.25V variation is acceptable for standard indication circuits with typical current-limiting resistor designs. Verify circuit design accommodates the higher forward voltage before selection. For voltage-critical applications, prioritize 1.9V variants (151053RS03000, HLMP-EG08 series).

Q3: Does brightness variation between substitutes affect circuit functionality?

A: The original WP1503SRC/E provides 5000mcd. Substitute parts range from 2780mcd to 18150mcd. Brightness selection depends on application requirements: lower brightness (2780mcd–4000mcd) for standard indication; higher brightness (8100mcd–18150mcd) for high-ambient or long-distance visibility. Circuit design (resistor value, supply voltage) may require adjustment to maintain consistent brightness. Verify application brightness requirements before selection.

Q4: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry RoHS3 Compliant status and REACH Unaffected regulatory classification, matching the original WP1503SRC/E specification. All parts are classified as EAR99 for export control purposes.

Q5: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging configurations: Bulk (standard reel), Tape & Box (TB), and unspecified packaging. HLMP-EG08-WZ0DD is available in Tape & Box format for automated assembly; other variants are available in bulk packaging. Verify packaging requirements for manufacturing process compatibility.

Q6: Which substitute part provides the closest electrical match to WP1503SRC/E?

A: The 151053RS03000 (Würth Elektronik) provides the closest match: 1.9V forward voltage (vs. 1.85V original), 5000mcd brightness (identical), 623nm wavelength (vs. 640nm original, within red spectrum), and 30° viewing angle (identical). Height increases marginally to 8.85mm. This part is recommended as the primary direct replacement for applications requiring 30° viewing angle and 5000mcd brightness.

Q7: Can narrow-angle HLMP-EG08 variants be used in applications designed for 30° viewing angle?

A: HLMP-EG08 series parts feature 8° narrow viewing angle, significantly different from the original 30° specification. These parts are suitable only for applications where narrow-angle directional indication is acceptable or preferred. Do not substitute in applications requiring wide-angle visibility without circuit redesign verification.

Q8: What is the inventory status for substitute parts?

A: All substitute parts carry Active product status with established inventory: WP1503SRC/J4 (1439 Pcs), 151053RS03000 (3100 Pcs), 7343-2USRC/S1060 (1035 Pcs), HLMP-EG08-Y2000 (18832 Pcs), HLMP-EG08-X1000 (13676 Pcs). Highest inventory availability is with Broadcom HLMP-EG08 series variants, ensuring procurement continuity.

Q9: Are there wavelength differences between substitute parts?

A: Yes. The original WP1503SRC/E operates at 640nm dominant wavelength. Substitutes range from 623nm to 640nm dominant wavelength, all within the red LED spectrum (620nm–650nm range). Wavelength variation may produce slight color perception differences but does not affect functional indication performance. For color-critical applications, prioritize parts with 640nm or 639nm wavelength (WP1503SRC/J4, 383-2SDRC/S530-A4).

Q10: What is the moisture sensitivity level (MSL) for substitute parts?

A: All substitute parts carry MSL 1 (Unlimited) classification, identical to the original WP1503SRC/E. This indicates no moisture sensitivity restrictions for storage, handling, or assembly processes.

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