WP7104ID Red Diffused T-1 LED Equivalent & Substitute Parts

Part Overview

The WP7104ID is a red diffused T-1 through-hole LED manufactured by Kingbright, designed for discrete LED indication applications. This component features a 625nm dominant wavelength, 2V forward voltage, and 20mcd brightness rating with a 40° viewing angle. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain identical or near-identical electrical and mechanical specifications, while substitute parts offer functional alternatives within acceptable parameter ranges for red diffused T-1 LED applications.

Key Parameters

Parameter	WP7104ID Value	Specification Type
Color	Red	Fixed
Lens Transparency	Diffused	Fixed
Lens Size	3mm, T-1	Fixed
Lens Style	Round with Domed Top	Fixed
Mounting Type	Through Hole	Fixed
Package / Case	Radial	Fixed
Voltage - Forward (Vf) (Typ)	2V	Variable (±0.5V acceptable)
Current - Test	20mA	Variable (±10mA acceptable)
Millicandela Rating	20mcd	Variable (±50% acceptable)
Viewing Angle	40°	Variable (±25° acceptable)
Wavelength - Dominant	625nm	Variable (±15nm acceptable)
Height (Max)	5.90mm	Variable (±0.65mm acceptable)
RoHS Status	ROHS3 Compliant	Fixed
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Fixed

Substitute Part Grouping Explanation

Substitution logic for the WP7104ID is based on strict adherence to the following criteria:

Fixed Parameters (Non-Negotiable):

Color: Red
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Lens Style: Round with Domed Top
Mounting Type: Through Hole
Package / Case: Radial
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameters (Acceptable Ranges):

Voltage - Forward (Vf): 1.7V to 2.2V (±0.5V from 2V nominal)
Current - Test: 10mA to 30mA (±10mA from 20mA nominal)
Millicandela Rating: 10mcd to 40mcd (±50% from 20mcd nominal)
Viewing Angle: 30° to 60° (±25° from 40° nominal)
Wavelength - Dominant: 610nm to 640nm (±15nm from 625nm nominal)
Height (Max): 5.25mm to 6.55mm (±0.65mm from 5.90mm nominal)

Substitute parts are classified into two categories: Parametric Equivalents (active status, minimal parameter deviation) and Similar Parts (active or limited status, acceptable parameter variation within engineering tolerances).

Parameter Comparison

Parameter	WP7104ID	WP710A10ID	1254-10SURD/S530-A3	151031SS06000	3HD-F	3RD-F	3SRD-F	4300F1LC	HLMP-1301-G00FG	HLMP-1600
Manufacturer	Kingbright	Kingbright	Everlight Electronics	Würth Elektronik	Bivar Inc.	Bivar Inc.	Bivar Inc.	Visual Communications Company	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Not For New Designs	Active	Active
Color	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3mm, T-1	3.00mm Dia	3.00mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Voltage - Forward (Vf) (Typ)	2V	2V	2V	2.2V	2V	2.1V	1.7V	1.8V	1.9V	5V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA	2mA	10mA	10mA
Millicandela Rating	20mcd	20mcd	400mcd	35mcd	30mcd	2mcd	40mcd	1.8mcd	8.6mcd	2.1mcd
Viewing Angle	40°	40°	30°	60°	35°	35°	35°	50°	60°	60°
Wavelength - Dominant	625nm	617nm	624nm	640nm	—	—	—	—	626nm	626nm
Wavelength - Peak	627nm	627nm	632nm	650nm	625nm	700nm	645nm	635nm	635nm	635nm
Height (Max)	5.90mm	5.90mm	5.30mm	5.55mm	5.30mm	5.30mm	5.30mm	6.35mm	6.35mm	6.35mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	—	Bulk	Tape & Reel (TR)	Bulk	Bulk	Bulk	Bulk	Bulk	Bulk	Bulk

Engineering Selection Recommendations

Primary Equivalent (Active Status):

WP710A10ID is the recommended primary equivalent for WP7104ID replacement. This Kingbright component maintains identical electrical specifications (2V forward voltage, 20mA test current, 20mcd brightness, 40° viewing angle) and mechanical form factor (3mm T-1 radial through-hole). The part is currently in active production status with 32,497 units in stock, ensuring long-term availability. Both components are ROHS3 compliant with MSL 1 rating. The dominant wavelength differs slightly (617nm versus 625nm), remaining within the acceptable ±15nm substitution range for red diffused LED applications.

Secondary Equivalents (Active Status, Minor Parameter Variation):

The following parts are suitable for applications where minor parameter deviations are acceptable:

3HD-F (Bivar Inc.): Maintains 2V forward voltage and 20mA test current with 30mcd brightness (within ±50% tolerance). Viewing angle of 35° is within acceptable range. Active production status with 1,103 units in stock.
3SRD-F (Bivar Inc.): Offers 1.7V forward voltage (within ±0.5V tolerance) and 40mcd brightness (within ±50% tolerance). Maintains 20mA test current and 35° viewing angle. Active production status with 1,018 units in stock.
151031SS06000 (Würth Elektronik): Features 2.2V forward voltage (within ±0.5V tolerance) and 35mcd brightness (within ±50% tolerance). Viewing angle of 60° exceeds nominal but remains within acceptable range. Active production status with 10,009 units in stock. Part of WL-TMRC series.

Alternative Substitutes (Active Status, Significant Parameter Variation):

The following parts function as red diffused T-1 LEDs but exhibit parameter variations requiring circuit design consideration:

1254-10SURD/S530-A3 (Everlight Electronics): Provides 400mcd brightness (20x higher than nominal), suitable for high-visibility applications. Maintains 2V forward voltage and 20mA test current. Viewing angle of 30° is narrower than nominal. Tape & Reel packaging. Active production status with 817 units in stock.
HLMP-1301-G00FG (Broadcom Limited): Operates at 1.9V forward voltage with 10mA test current (half nominal). Brightness of 8.6mcd is significantly lower. Viewing angle of 60° is wider than nominal. Active production status with 1,067 units in stock. Suitable for low-power indicator applications.

Not Recommended for New Designs:

4300F1LC (Visual Communications Company): Classified as "Not For New Designs" status. Although electrically functional, this part should not be selected for new circuit designs due to manufacturer discontinuation trajectory.
3RD-F (Bivar Inc.): While active, the 2mcd brightness rating is significantly below nominal (90% reduction), limiting application suitability for standard indication purposes.
HLMP-1600 (Broadcom Limited): Operates at 5V forward voltage, incompatible with 2V circuit designs without additional current-limiting components. Brightness of 2.1mcd is substantially lower than nominal.

Compliance Verification:

All recommended equivalents and substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original WP7104ID specifications. REACH unaffected status is confirmed for all parts where data is provided.

Frequently Asked Questions (FAQ)

Q1: Can WP710A10ID directly replace WP7104ID without circuit modification?

A: Yes. WP710A10ID is a parametric equivalent with identical forward voltage (2V), test current (20mA), brightness (20mcd), and viewing angle (40°). The dominant wavelength difference (617nm versus 625nm) is within the ±15nm acceptable range for red diffused LED applications and produces no perceptible color difference in human perception. No circuit modification is required.

Q2: What is the difference between "Parametric Equivalent" and "Similar Part" classifications?

A: Parametric Equivalents (such as WP710A10ID) maintain all electrical and mechanical specifications within ±5% of the original part, enabling direct substitution. Similar Parts (such as 3HD-F or 151031SS06000) exhibit parameter variations within acceptable engineering tolerances (±50% brightness, ±25° viewing angle, ±0.5V forward voltage) but require circuit design verification to confirm compatibility with specific application requirements.

Q3: Why does HLMP-1600 have a 5V forward voltage rating when the original part is 2V?

A: HLMP-1600 is designed for different circuit applications requiring higher voltage operation. This part is not a direct substitute for 2V circuits. Using HLMP-1600 in a 2V circuit would result in insufficient current flow and non-operation. Conversely, using WP7104ID in a 5V circuit would cause excessive current and component failure.

Q4: Is the 1254-10SURD/S530-A3 suitable for applications requiring standard brightness?

A: The 1254-10SURD/S530-A3 produces 400mcd brightness, which is 20 times higher than the WP7104ID nominal 20mcd rating. This part is suitable only for high-visibility indicator applications where increased brightness is required. For standard indication purposes, this part would produce excessive brightness and consume more power than necessary.

Q5: What packaging options are available for equivalent parts?

A: WP710A10ID is available in Bulk packaging. The 1254-10SURD/S530-A3 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. All other substitute parts listed are available in Bulk packaging. Packaging selection depends on production volume and assembly methodology.

Q6: Are all substitute parts RoHS3 compliant?

A: All recommended substitute parts are confirmed ROHS3 compliant. The original WP7104ID is also ROHS3 compliant. This compliance status ensures compatibility with environmental regulations and customer requirements across all listed alternatives.

Q7: Which substitute part offers the closest match to WP7104ID specifications?

A: WP710A10ID provides the closest match with identical electrical specifications and mechanical form factor. This Kingbright component is the primary recommended equivalent. If WP710A10ID is unavailable, 3HD-F (Bivar Inc.) offers the next closest match with only minor brightness variation (30mcd versus 20mcd, within ±50% tolerance).

Q8: Can parts with different viewing angles be substituted interchangeably?

A: Viewing angle substitution depends on application requirements. The WP7104ID has a 40° viewing angle. Parts with narrower angles (such as 1254-10SURD/S530-A3 at 30°) concentrate light in a smaller cone, suitable for focused indication. Parts with wider angles (such as 151031SS06000 at 60°) distribute light over a larger area, suitable for omnidirectional visibility. Circuit design must account for these differences in optical performance.

Q9: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity limitations. These parts do not require special moisture-controlled storage, handling, or baking procedures before soldering. All listed substitute parts maintain this MSL 1 rating, ensuring compatibility with standard manufacturing and storage practices.

Q10: Are there inventory considerations when selecting substitute parts?

A: Yes. WP710A10ID has 32,497 units in stock (highest availability), followed by 151031SS06000 with 10,009 units. Other active substitutes range from 811 to 6,677 units in stock. For long-term production requirements, WP710A10ID is recommended due to superior inventory levels and active production status. The original WP7104ID, though obsolete, has 952 units remaining in stock.

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