WP7104PBC/A Equivalent & Substitute Parts

Part Overview

The WP7104PBC/A is a blue LED indication component manufactured by Kingbright, featuring a 3mm T-1 through-hole package with 470nm dominant wavelength and 1000mcd brightness rating. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The component operates at 3.2V forward voltage with 20mA test current and is suitable for standard LED indication applications requiring through-hole mounting.

Substiute Parts

WP7104PBC/A

KingbrightIn Stock: 765WP7104PBC/A Datasheet

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WP710A10QBC/D

KingbrightIn Stock: 29803WP710A10QBC/D Datasheet

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151033BS03000

Würth ElektronikIn Stock: 1296151033BS03000 Datasheet

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3294-15SUBC/S400-A6

Everlight Electronics Co LtdIn Stock: 10513294-15SUBC/S400-A6 Datasheet

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3294-15UBGC/S400-A6

Everlight Electronics Co LtdIn Stock: 9103294-15UBGC/S400-A6 Datasheet

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OVLBB4C7

TT Electronics / Optek TechnologyIn Stock: 108695OVLBB4C7 Datasheet

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SSL-LX3044USBC

Lumex Opto/Components Inc.In Stock: 10667SSL-LX3044USBC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WP7104PBC/A is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Blue
• Mounting Type: Through Hole
• Package Style: Radial (T-1 or 3mm Round)
• Lens Transparency: Clear
• Lens Style: Round with Domed Top
• Current - Test: 20mA
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Voltage - Forward (Vf): Range 2.8V to 3.5V (acceptable variance for LED indication circuits)
• Wavelength - Dominant: 465nm to 505nm (blue spectrum range)
• Millicandela Rating: 320mcd to 3800mcd (brightness variation acceptable based on circuit design)
• Viewing Angle: 20° to 90° (application-dependent)
• Height (Max): 4.45mm to 5.90mm (PCB layout dependent)

All substitute parts listed maintain compliance with ROHS3 and REACH requirements, ensuring regulatory compatibility with the original component.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - WP710A10QBC/D (Kingbright)

The WP710A10QBC/D is the preferred substitute for the obsolete WP7104PBC/A. Both components are manufactured by Kingbright and share identical mechanical dimensions (2.90mm diameter, 5.90mm height), lens configuration (3mm T-1 round domed clear), and electrical test parameters (20mA). The WP710A10QBC/D is currently in active production status with 29,696 units in stock. Forward voltage variance (3.3V vs 3.2V) and brightness increase (1600mcd vs 1000mcd) are within acceptable ranges for standard LED indication circuits. Both components maintain ROHS3 compliance and MSL 1 rating.

Secondary Substitute - OVLBB4C7 (TT Electronics / Optek Technology)

The OVLBB4C7 provides direct electrical and mechanical compatibility with identical forward voltage (3.2V), wavelength (470nm dominant), and test current (20mA). Physical dimensions are comparable (5.35mm height vs 5.90mm). This component features higher brightness (1800mcd) and wider viewing angle (45° vs 20°), suitable for applications requiring increased visibility. Active production status with 108,612 units in stock ensures supply continuity. ROHS3 compliance confirmed.

Tertiary Substitute - SSL-LX3044USBC (Lumex Opto/Components Inc.)

The SSL-LX3044USBC maintains identical mechanical package (3mm T-1), lens configuration, and test current. Forward voltage is 3.5V with 1000mcd brightness matching the original specification. Peak wavelength of 470nm aligns with the WP7104PBC/A. Height specification (4.60mm) is within acceptable PCB layout tolerance. Active production status with 10,598 units in stock. ROHS3 and REACH compliance confirmed.

Alternative Substitute - 151033BS03000 (Würth Elektronik)

The 151033BS03000 from Würth Elektronik WL-TMRW series offers the highest brightness rating (3800mcd) among available substitutes, with matching 470nm dominant wavelength and 20mA test current. Forward voltage of 2.8V is the lowest in the substitute group, requiring circuit verification for voltage drop compatibility. Viewing angle of 30° provides moderate beam spread. Height of 5.55mm is compatible with standard PCB layouts. Active production with 1,225 units in stock. ROHS3 compliance confirmed.

Brightness-Reduced Alternative - 3294-15SUBC/S400-A6 (Everlight Electronics)

The 3294-15SUBC/S400-A6 is suitable for applications where lower brightness (320mcd) is acceptable or preferred. Forward voltage of 3.4V and 470nm wavelength maintain electrical compatibility. Wide viewing angle of 90° provides broad beam distribution. Compact height of 4.45mm accommodates space-constrained layouts. Active production with 1,040 units in stock. ROHS3 compliance confirmed.

Cyan-Spectrum Alternative - 3294-15UBGC/S400-A6 (Everlight Electronics)

The 3294-15UBGC/S400-A6 operates at 505nm dominant wavelength, shifting the color perception toward cyan within the blue spectrum. This component is suitable only for applications where cyan indication is functionally equivalent to pure blue. Forward voltage of 3.5V and 800mcd brightness provide moderate intensity. Wide 90° viewing angle and compact 4.45mm height offer design flexibility. Active production with 864 units in stock. ROHS3 compliance confirmed.

All substitute parts maintain regulatory compliance (ROHS3, REACH Unaffected) and moisture sensitivity ratings consistent with the original component, ensuring compatibility with existing manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q1: Can WP710A10QBC/D directly replace WP7104PBC/A without circuit modification?

A: Yes. Both components share identical mechanical dimensions, lens configuration, and test current (20mA). Forward voltage variance (3.3V vs 3.2V) and brightness increase (1600mcd vs 1000mcd) fall within acceptable ranges for standard LED indication circuits. No circuit redesign is required.

Q2: What is the primary reason for substituting the WP7104PBC/A?

A: The WP7104PBC/A is classified as obsolete. Substitute parts are necessary to maintain production continuity and ensure long-term component availability. All listed substitutes are in active production status.

Q3: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, ensuring regulatory compatibility with the original component and current environmental standards.

Q4: Which substitute offers the closest electrical match to the original WP7104PBC/A?

A: The OVLBB4C7 provides the closest electrical match with identical forward voltage (3.2V), dominant wavelength (470nm), and test current (20mA). Brightness is slightly higher (1800mcd vs 1000mcd), which is acceptable for indication applications.

Q5: Can I use 3294-15UBGC/S400-A6 as a direct replacement?

A: The 3294-15UBGC/S400-A6 operates at 505nm wavelength, producing cyan rather than pure blue indication. Use this component only if cyan color is functionally equivalent to blue in your application. Electrical parameters (3.5V forward voltage, 20mA test current) are compatible.

Q6: What is the brightness difference between WP7104PBC/A and 151033BS03000?

A: The 151033BS03000 provides 3800mcd brightness compared to 1000mcd in the original component. This 3.8x increase is suitable for applications requiring higher visibility. Forward voltage is lower (2.8V vs 3.2V), requiring verification of circuit voltage drop compatibility.

Q7: Which substitute has the smallest physical height?

A: Both 3294-15SUBC/S400-A6 and 3294-15UBGC/S400-A6 have the smallest height at 4.45mm, compared to 5.90mm for the original WP7104PBC/A. These components are suitable for space-constrained PCB layouts.

Q8: Do all substitutes use the same through-hole radial package?

A: Yes. All substitute parts use through-hole radial packages compatible with standard PCB mounting. Physical dimensions vary slightly (height range 4.45mm to 5.90mm), but all are suitable for conventional through-hole assembly processes.

Q9: What is the viewing angle difference between substitutes?

A: Viewing angles range from 20° (WP710A10QBC/D, matching the original) to 90° (3294-15SUBC/S400-A6, 3294-15UBGC/S400-A6). Narrower angles (20°-30°) provide focused indication; wider angles (45°-90°) provide broad visibility. Select based on application requirements.

Q10: Are there inventory differences between substitutes?

A: Yes. OVLBB4C7 has the highest inventory (108,612 units), followed by WP710A10QBC/D (29,696 units). Lower inventory items include 3294-15UBGC/S400-A6 (864 units) and 3294-15SUBC/S400-A6 (1,040 units). Verify availability for production volume requirements.

Q11: Which substitute offers the best balance of brightness and viewing angle?

A: The OVLBB4C7 provides balanced specifications with 1800mcd brightness and 45° viewing angle, offering improved visibility compared to the original 1000mcd/20° combination while maintaining identical forward voltage (3.2V).

Q12: Can forward voltage differences affect circuit performance?

A: Forward voltage variance (2.8V to 3.5V range) affects voltage drop across current-limiting resistors. Verify that your circuit design accommodates this range. Most standard LED indication circuits with appropriate resistor sizing tolerate this variance without performance degradation.