WP36BID Equivalent & Substitute Parts Reference

Part Overview

The WP36BID is a red diffused T-1 through-hole LED manufactured by Kingbright, designed for indication applications. This component features a 3mm lens with domed top, 617nm dominant wavelength, and 15mcd brightness rating. The part operates at 14V forward voltage with a 60° viewing angle and includes flashing capability. The WP36BID maintains active product status and full RoHS3 compliance.

Substitute parts are necessary when the WP36BID becomes unavailable, when alternative voltage ratings better match circuit requirements, or when different brightness levels are required for specific application needs. Substitutes must maintain mechanical compatibility (T-1 through-hole package, 3mm lens form factor) and preserve the red color specification while accommodating variations in electrical characteristics.

Key Parameters

Parameter	WP36BID Value	Substitution Relevance
Manufacturer	Kingbright	Source identification
Color	Red	Critical - must match
Lens Size	3mm, T-1	Critical - mechanical compatibility
Lens Transparency	Diffused	Critical - optical characteristic
Mounting Type	Through Hole	Critical - PCB compatibility
Voltage - Forward (Vf)	14V	Primary - circuit design dependent
Millicandela Rating	15mcd	Secondary - brightness requirement
Wavelength - Dominant	617nm	Secondary - color perception
Viewing Angle	60°	Secondary - visibility requirement
Package / Case	Radial	Critical - lead configuration
RoHS Status	ROHS3 Compliant	Regulatory - compliance requirement

Substitute Part Grouping Explanation

Substitution logic for the WP36BID is based on strict adherence to the following critical parameters:

Mechanical Compatibility Requirements (Non-negotiable):

Lens size must be 3mm, T-1 form factor
Mounting type must be through-hole
Package configuration must be radial
Lens transparency must be diffused
Color must be red

Electrical Compatibility Parameters (Application-dependent):

Forward voltage (Vf) determines circuit integration; substitutes with different Vf ratings require circuit redesign
Millicandela rating affects visibility; lower ratings reduce brightness, higher ratings increase brightness
Wavelength characteristics (dominant and peak) determine perceived color shade
Viewing angle affects visibility range; 50° to 60° range provides acceptable substitution

Regulatory & Compliance (Mandatory):

RoHS3 compliance required for all substitutes
REACH unaffected status maintained across all options
ECCN EAR99 classification consistent

The substitute parts listed below maintain all critical mechanical parameters while offering variations in voltage rating and brightness to accommodate different circuit designs and application requirements.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	Inventory
WP36BID	Kingbright	14V	15mcd	617nm	60°	5.00mm	Active	1070 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 Mechanical Replacement (Same Circuit Voltage):

HLMP-1601 is the closest electrical match for 12V applications, offering active product status and Broadcom manufacturing reliability. This part maintains 60° viewing angle matching the WP36BID specification. However, brightness is significantly reduced (2.1mcd versus 15mcd), requiring circuit validation for visibility adequacy.

For Low-Voltage Circuit Integration (1.7V to 2.1V):

HLMP-1700 and HLMP-1700-B0002 provide identical electrical specifications (1.7V, 2.1mcd) with extensive inventory availability (530,300 and 21,034 units respectively). HLMP-1700-B0002 offers Cut Tape packaging for automated assembly. Both maintain active product status and full compliance certifications. Viewing angle reduces to 50°, acceptable for most indication applications.

HLMP-K101 delivers significantly higher brightness (45mcd) at 1.8V, suitable for applications requiring enhanced visibility. This part maintains 60° viewing angle and active status.

For 5V Circuit Applications:

HLMP-1600 operates at 5V with active product status and 60° viewing angle. Brightness rating of 2.1mcd requires circuit validation against original 15mcd specification.

Parts to Avoid for New Designs:

4300F1LC carries "Not For New Designs" status and should not be selected for new applications despite adequate mechanical compatibility.

LTL-4211 exhibits reduced viewing angle (40° versus 60°) and REACH affected status, limiting suitability for new designs.

Compliance Verification:

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status, matching the WP36BID regulatory profile. ECCN classification remains EAR99 across all options.

Frequently Asked Questions (FAQ)

Q: Can I substitute WP36BID with a lower voltage part like HLMP-1700 in my existing circuit?

A: Direct substitution requires circuit redesign. The WP36BID operates at 14V forward voltage; HLMP-1700 operates at 1.7V. Your current-limiting resistor and power supply must be recalculated to accommodate the new voltage rating. Mechanical compatibility is confirmed (3mm T-1 through-hole, diffused red lens), but electrical integration is not direct.

Q: Why is the brightness so different between WP36BID (15mcd) and most substitutes (2-2.1mcd)?

A: The WP36BID is specified as a high-brightness indication LED. Most Broadcom HLMP series substitutes are standard brightness indicators. HLMP-K101 provides 45mcd brightness, exceeding the original specification. Brightness selection depends on your application's visibility requirements and viewing distance.

Q: What is the difference between HLMP-1700 and HLMP-1700-B0002?

A: Both parts are electrically and mechanically identical (1.7V, 2.1mcd, 626nm, 50° viewing angle, 6.35mm height). The difference is packaging: HLMP-1700 is supplied in bulk; HLMP-1700-B0002 is supplied in cut tape format suitable for automated pick-and-place assembly. Select based on your assembly process requirements.

Q: Is LTL-1CHE a suitable substitute for WP36BID?

A: LTL-1CHE maintains mechanical compatibility (3mm diffused red lens, through-hole mounting) and offers comparable brightness (12.6mcd versus 15mcd). However, the lens size is specified as 3.10mm diameter rather than standard 3mm T-1, and height is 5.20mm versus 5.00mm maximum. These dimensional variations may affect PCB layout fit. Verify mechanical clearance before selection.

Q: Why should I avoid 4300F1LC despite its mechanical compatibility?

A: The 4300F1LC carries "Not For New Designs" product status from Visual Communications Company. This designation indicates the manufacturer is discontinuing or has discontinued this part. For new designs, select from active status parts: HLMP series (Broadcom) or LTL series (Lite-On) options.

Q: Can I use a part with 40° viewing angle (LTL-4211) instead of 60° (WP36BID)?

A: Viewing angle reduction from 60° to 40° narrows the visibility range. This substitution is acceptable only if your application does not require wide-angle visibility. Verify that the narrower viewing angle meets your specific indication requirements before selection.

Q: What does "REACH Affected" status on LTL-4211 mean for my design?

A: REACH Affected status indicates the part contains substances of concern under EU REACH regulations. If your product is sold in EU markets or subject to EU regulations, this part may require additional documentation or may be unsuitable. The WP36BID and most recommended substitutes maintain REACH Unaffected status, providing regulatory simplicity.

Q: Are all substitute parts RoHS3 compliant like the WP36BID?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance, matching the WP36BID regulatory requirement. This consistency ensures compliance continuity across design alternatives.

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