WP36BHD LED RED DIFFUSED T-1 T/H Equivalent & Substitute Parts

Part Overview

The WP36BHD is a red diffused LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This component features a 3mm T-1 lens form factor with a 635nm dominant wavelength and 1.8mcd brightness rating. The part operates at 14V forward voltage with a 60° viewing angle and flashing capability. Currently in active product status with 765 pieces in stock, the WP36BHD is ROHS3 compliant and MSL Level 1 rated.

Substitute parts are necessary when the WP36BHD becomes unavailable, when alternative voltage specifications better match circuit requirements, or when different brightness levels are required for specific application needs. The substitute parts listed maintain compatibility through identical mechanical form factors, through-hole mounting, and red LED indication functionality.

Key Parameters

Parameter	WP36BHD Value	Substitution Relevance
Lens Size / Form Factor	3mm T-1	Critical - determines mechanical fit
Mounting Type	Through Hole Radial	Critical - determines PCB compatibility
Color	Red	Critical - determines optical output
Lens Transparency	Diffused	Critical - determines light distribution
Voltage - Forward (Vf)	14V	Important - determines circuit compatibility
Millicandela Rating	1.8mcd	Important - determines brightness level
Wavelength - Dominant	635nm	Important - determines color perception
Viewing Angle	60°	Important - determines visibility range
RoHS Status	ROHS3 Compliant	Important - determines regulatory compliance
MSL Rating	1 (Unlimited)	Important - determines storage requirements

Substitute Part Grouping Explanation

Substitution logic for the WP36BHD is based on the following allowed parameters:

Mechanical Compatibility Requirements:

Lens size must be 3mm T-1 form factor
Mounting type must be through-hole radial configuration
Height must accommodate standard PCB spacing (5.00mm to 6.55mm acceptable range)

Optical Compatibility Requirements:

Color must be red
Lens transparency must be diffused
Wavelength range: dominant wavelength 623nm to 657nm acceptable (red spectrum)

Electrical Compatibility Requirements:

Forward voltage (Vf) must match circuit design: 14V primary requirement, or alternative voltage ratings (1.7V to 2.1V) for different circuit topologies
Millicandela rating: 1.8mcd to 45mcd range acceptable depending on application brightness needs
Viewing angle: 40° to 60° acceptable range

Regulatory Compliance Requirements:

ROHS3 compliant status required
MSL Level 1 rating required
REACH unaffected status required

Substitute parts are grouped by forward voltage compatibility, as this parameter determines direct circuit substitution feasibility.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	Inventory
WP36BHD	Kingbright	14V	1.8mcd	635nm	60°	5.00mm	Active	765 Pcs
4300F1LC	VCC	1.8V	1.8mcd	-	50°	6.35mm	Not For New Designs	5500 Pcs
HLMP-1600	Broadcom Limited	5V	2.1mcd	626nm	60°	6.35mm	Active	6677 Pcs
HLMP-1601	Broadcom Limited	12V	2.1mcd	626nm	60°	6.35mm	Active	1600 Pcs
HLMP-1700	Broadcom Limited	1.7V	2.1mcd	626nm	50°	6.35mm	Active	530300 Pcs
HLMP-1700-B0002	Broadcom Limited	1.7V	2.1mcd	626nm	50°	6.35mm	Active	21034 Pcs
HLMP-K101	Broadcom Limited	1.8V	45mcd	637nm	60°	6.35mm	Active	37707 Pcs
HLMP-K150	Broadcom Limited	1.7V	2mcd	640nm	60°	6.35mm	Active	34560 Pcs
HLMP-K150-C0002	Broadcom Limited	1.7V	2mcd	640nm	60°	6.35mm	Active	3198 Pcs
LTL-1CHE	Lite-On Inc.	2V	12.6mcd	623nm	60°	5.20mm	Active	16940 Pcs
LTL-4211	Lite-On Inc.	2.1V	2.5mcd	657nm	40°	6.55mm	Active	12350 Pcs

Engineering Selection Recommendations

For Direct 14V Circuit Replacement: HLMP-1601 (Broadcom Limited) is the only substitute with 12V forward voltage rating, providing the closest electrical match to the WP36BHD 14V specification. This part maintains active product status, ROHS3 compliance, and identical mechanical form factor. With 1600 pieces in inventory and 2.1mcd brightness, it accommodates circuits designed for high-voltage LED indication.

For Low-Voltage Circuit Applications (1.7V to 2.1V): Multiple active substitutes are available:

HLMP-1700 and HLMP-1700-B0002 (1.7V, 2.1mcd, 626nm) offer highest inventory availability (530,300 and 21,034 pieces respectively) with active product status
HLMP-K150 and HLMP-K150-C0002 (1.7V, 2mcd, 640nm) provide similar electrical characteristics with 34,560 and 3,198 pieces available
LTL-1CHE (2V, 12.6mcd, 623nm) offers increased brightness at 16,940 pieces inventory
HLMP-K101 (1.8V, 45mcd, 637nm) provides significantly higher brightness (45mcd) for applications requiring enhanced visibility

For High-Brightness Applications: HLMP-K101 delivers 45mcd brightness compared to WP36BHD 1.8mcd, suitable for applications requiring increased luminous intensity while maintaining 1.8V forward voltage and 60° viewing angle.

Avoid for New Designs: 4300F1LC (VCC) carries "Not For New Designs" product status and should not be selected for new applications despite mechanical compatibility.

Compliance Verification: All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status matching the WP36BHD regulatory profile.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1601 directly replace WP36BHD in a 14V circuit? A: HLMP-1601 operates at 12V forward voltage, not 14V. Direct substitution requires circuit verification to confirm 12V operation is acceptable. The 2.1mcd brightness is comparable to WP36BHD 1.8mcd. Mechanical form factor and through-hole mounting are identical.

Q: What is the difference between HLMP-1700 and HLMP-1700-B0002? A: Both parts are electrically and optically identical (1.7V, 2.1mcd, 626nm, 50° viewing angle). The difference is packaging: HLMP-1700 is supplied in bulk, while HLMP-1700-B0002 is supplied in cut tape (CT). Select based on assembly process requirements.

Q: Why does WP36BHD operate at 14V while most substitutes operate at 1.7V to 2.1V? A: The WP36BHD is designed for high-voltage indication circuits. Substitute parts at 1.7V to 2.1V are designed for standard low-voltage circuits. Circuit topology determines which voltage rating is appropriate. Do not mix voltage ratings without circuit redesign.

Q: Is HLMP-K101 suitable if higher brightness is needed? A: HLMP-K101 provides 45mcd brightness compared to WP36BHD 1.8mcd, a 25-fold increase. It maintains 1.8V forward voltage, 60° viewing angle, and 637nm wavelength within acceptable red spectrum. Verify circuit current capacity can support 20mA test current before substitution.

Q: What does "Not For New Designs" mean for 4300F1LC? A: This product status indicates the manufacturer is discontinuing this part. While mechanically compatible, 4300F1LC should not be selected for new product designs. Use active status parts instead: HLMP series or LTL series from Broadcom or Lite-On.

Q: Are all substitutes ROHS3 compliant? A: All listed substitutes are ROHS3 compliant. LTL-4211 carries "REACH Affected" status while all others are "REACH Unaffected." Verify REACH compliance requirements for your specific application region.

Q: Can I use LTL-4211 as a substitute despite 40° viewing angle versus WP36BHD 60°? A: LTL-4211 has a narrower 40° viewing angle compared to WP36BHD 60°. This reduces visibility range. Substitution is mechanically possible but optically different. Verify application visibility requirements before selection.

Q: What is the height difference impact between WP36BHD (5.00mm) and substitute parts (6.35mm)? A: Substitute parts are 1.35mm taller. Verify PCB clearance and component spacing accommodate the increased height. This is a mechanical consideration for board layout compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message