WP56BHD Equivalent & Substitute Parts

Part Overview

The WP56BHD is a red diffused LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This T-1 3/4 (5mm) LED features a 635nm dominant wavelength with flashing capability and operates at 14V forward voltage. The component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the WP56BHD reaches end-of-life status, experiences supply constraints, or when design requirements permit operation at alternative voltage levels while maintaining functional compatibility within the red LED indication category.

Key Parameters

Parameter	WP56BHD Value	Substitution Relevance
Lens Size	5mm, T-1 3/4	Critical - Physical form factor
Lens Transparency	Diffused	Critical - Optical characteristic
Color	Red	Critical - Spectral output
Mounting Type	Through Hole	Critical - PCB integration
Wavelength - Dominant	635nm	Important - Color specification
Voltage - Forward (Vf)	14V	Important - Circuit design parameter
Millicandela Rating	4mcd	Important - Brightness level
Viewing Angle	60°	Important - Visibility range
Features	Flashing	Important - Functional capability
RoHS Status	ROHS3 Compliant	Critical - Regulatory compliance

Substitute Part Grouping Explanation

Substitution logic for the WP56BHD is based on the following allowed parameters:

Critical Matching Parameters:

Lens size: 5mm, T-1 3/4 form factor
Lens transparency: Diffused optical characteristic
Color: Red spectral output
Mounting type: Through-hole configuration
RoHS3 compliance status

Important Compatibility Parameters:

Wavelength dominant range: 623nm to 637nm (red spectrum)
Voltage forward rating: Acceptable range depends on circuit design flexibility
Millicandela rating: 2.1mcd to 70mcd (brightness variation acceptable for indication applications)
Viewing angle: 50° to 65° (acceptable variation for indicator applications)

Functional Parameters:

Features: Flashing capability present in main part; non-flashing substitutes acceptable for static indication applications
Package/case: Radial configuration required

Substitute parts are grouped into two categories: direct mechanical and optical equivalents (same form factor, lens type, and color), and functional alternatives (compatible electrical and optical characteristics with acceptable parameter variations).

Parameter Comparison

Part Number	Manufacturer	Lens Size	Lens Transparency	Color	Mounting Type	Wavelength - Dominant (nm)	Voltage - Forward (V)	Millicandela (mcd)	Viewing Angle (°)	RoHS Status	Product Status
WP56BHD	Kingbright	5mm, T-1 3/4	Diffused	Red	Through Hole	635	14	4	60	ROHS3 Compliant	Active
5219240F	Dialight	5.00mm	Diffused	Red	Through Hole	Not specified	Not specified	6.3	Not specified	ROHS3 Compliant	Active
5219672F	Dialight	4.75mm	Diffused	Red	Through Hole	623	2	60	60	ROHS3 Compliant	Active
HLMP-3301-F00B2	Broadcom Limited	Not specified	Diffused, Tinted	Red	Through Hole, Right Angle	Not specified	1.9	5.4	Not specified	ROHS3 Compliant	Active
HLMP-3301-F00DD	Broadcom Limited	5mm, T-1 3/4	Diffused	Red	Through Hole	626	1.9	5.4	60	ROHS3 Compliant	Active
HLMP-3351	Broadcom Limited	5mm, T-1 3/4	Diffused	Red	Through Hole	626	1.9	5.4	50	ROHS3 Compliant	Active
HLMP-3351-D0000	Broadcom Limited	5mm, T-1 3/4	Diffused	Red	Through Hole	626	1.9	2.1	50	ROHS3 Compliant	Active
HLMP-3351-D0002	Broadcom Limited	5mm, T-1 3/4	Diffused	Red	Through Hole	626	1.9	2.1	50	ROHS3 Compliant	Active
HLMP-3600-D00B2	Broadcom Limited	Not specified	Diffused, Tinted	Red	Through Hole, Right Angle	Not specified	5	2.1	60	ROHS3 Compliant	Active
HLMP-D101	Broadcom Limited	5mm, T-1 3/4	Diffused	Red	Through Hole	637	1.8	70	65	ROHS3 Compliant	Active
HLMP-D150	onsemi	Not specified	Not specified	Red	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Obsolete

Engineering Selection Recommendations

Tier 1 - Direct Mechanical and Optical Equivalents:

HLMP-3301-F00DD, HLMP-3351, HLMP-3351-D0000, and HLMP-3351-D0002 are mechanically and optically compatible with the WP56BHD. All feature 5mm T-1 3/4 form factor, diffused lens, red color, through-hole mounting, and wavelength in the 626nm range. All are Active status with ROHS3 compliance. These parts differ primarily in forward voltage (1.9V versus 14V) and millicandela rating, requiring circuit design verification for voltage compatibility.

HLMP-D101 maintains the same mechanical form factor and mounting type with compatible wavelength (637nm) and Active status. This part offers higher brightness (70mcd) and operates at 1.8V forward voltage, requiring circuit redesign for voltage compatibility.

Tier 2 - Functional Alternatives with Form Factor Variations:

5219240F (Dialight) and 5219672F (Dialight) provide red diffused through-hole LEDs with Active status and ROHS3 compliance. The 5219240F maintains 5.00mm diameter but lacks specified wavelength and voltage data. The 5219672F operates at 2V with 60mcd brightness and 623nm wavelength but features a 4.75mm diameter lens, introducing minor form factor deviation.

HLMP-3301-F00B2 and HLMP-3600-D00B2 employ right-angle mounting configuration, deviating from the radial through-hole standard of the WP56BHD. These are suitable only for applications where right-angle mounting is acceptable.

Obsolete Parts:

HLMP-D150 (onsemi) carries Obsolete product status and lacks complete technical specifications. This part is not recommended for new designs or substitution applications.

Compliance and Regulatory Status:

All recommended substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the WP56BHD. Moisture sensitivity level remains at MSL 1 (Unlimited) across all active alternatives.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3351-D0002 directly replace WP56BHD without circuit modification?

A: HLMP-3351-D0002 matches the mechanical form factor (5mm T-1 3/4), lens transparency (diffused), color (red), and mounting type (through-hole). However, the forward voltage differs significantly (1.9V versus 14V). Direct substitution requires circuit redesign to accommodate the lower voltage requirement. The millicandela rating (2.1mcd versus 4mcd) represents a brightness reduction acceptable for indication applications.

Q: What is the primary difference between HLMP-3351 and HLMP-3351-D0000?

A: Both parts share identical mechanical specifications (5mm T-1 3/4 form factor), optical characteristics (diffused red lens), electrical ratings (1.9V forward voltage, 10mA test current), and wavelength (626nm). The distinction lies in millicandela rating: HLMP-3351 provides 5.4mcd brightness, while HLMP-3351-D0000 provides 2.1mcd. Selection depends on required brightness level for the indication application.

Q: Why does 5219672F have a 4.75mm lens diameter instead of 5mm?

A: The 5219672F is specified with a 4.75mm diameter lens, representing a minor dimensional variation from the standard 5mm T-1 3/4 form factor. This variation may affect mechanical fit in PCB mounting holes designed for 5mm components. Verification of mechanical compatibility with the target PCB design is necessary before substitution.

Q: Are HLMP-3301-F00B2 and HLMP-3600-D00B2 suitable substitutes for WP56BHD?

A: These parts employ right-angle mounting configuration, whereas WP56BHD uses radial through-hole mounting. Right-angle mounting is mechanically incompatible with standard radial through-hole PCB designs. These parts are suitable only for applications where right-angle mounting is specified and PCB layout accommodates this configuration.

Q: What is the significance of the flashing feature in WP56BHD?

A: The WP56BHD incorporates internal flashing circuitry, enabling autonomous blinking operation without external control circuitry. Substitute parts listed (HLMP-3301-F00DD, HLMP-3351 series, HLMP-D101, and Dialight alternatives) do not specify flashing capability, indicating static LED operation. Applications requiring flashing functionality must either select a substitute with confirmed flashing capability or implement external flashing circuitry.

Q: How does the 14V forward voltage of WP56BHD compare to substitute options?

A: The WP56BHD operates at 14V forward voltage, significantly higher than most substitute parts. HLMP-3301-F00DD, HLMP-3351 series, and HLMP-D101 operate at 1.8V to 1.9V. The 5219672F operates at 2V, and HLMP-3600-D00B2 operates at 5V. Voltage compatibility is determined by the circuit design and available power supply voltage. Substitution with lower-voltage parts requires verification that the circuit can accommodate the reduced voltage requirement.

Q: What inventory availability should be considered for substitution decisions?

A: Current inventory levels are: WP56BHD (1,072 units), HLMP-3301-F00DD (43,381 units), HLMP-3351-D0000 (19,677 units), HLMP-D101 (32,743 units), 5219240F (2,526 units), and 5219672F (2,314 units). Higher inventory levels for substitute parts may provide supply chain advantages. However, substitution decisions must prioritize electrical and mechanical compatibility over inventory considerations.

Q: Is HLMP-D150 a viable substitute option?

A: HLMP-D150 carries Obsolete product status and lacks complete technical specifications in the provided data. Obsolete components present supply risk and are not recommended for new designs or substitution applications. Active alternatives with complete specifications are preferred.

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