TLHR5401 Equivalent & Substitute Parts

Part Overview

The TLHR5401 is a red diffused T-1 3/4 through-hole LED manufactured by Vishay Semiconductor Opto Division. This component operates at 2V forward voltage with a 12mcd brightness rating and 619nm dominant wavelength, designed for standard indication applications. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical form factor, and performance parameters that ensure functional compatibility in circuit applications.

Key Parameters

Parameter	TLHR5401 Value
Color	Red
Lens Transparency	Diffused
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	12mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	619nm
Package / Case	Radial
Height (Max)	12.80mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TLHR5401 are grouped based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

Color: Red
Mounting Type: Through Hole
Package Type: Radial or equivalent form factor
Lens Transparency: Diffused
Voltage - Forward (Vf): 2V nominal or within acceptable operating range
Current - Test: 10mA or compatible test current
Lens Size: 5mm, T-1 3/4 or equivalent mechanical dimensions

Substitution Logic: Parts are classified as direct equivalents when they maintain identical or near-identical electrical and mechanical specifications. Parts with variations in brightness (millicandela rating), wavelength, or viewing angle are included where the core electrical parameters (forward voltage, test current) and physical form factor remain compatible. Obsolete parts are excluded from active substitution recommendations.

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Lens Size	Height (Max)	Viewing Angle	Product Status
TLHR5401	Vishay	Red	2V	10mA	12mcd	619nm	5mm, T-1 3/4	12.80mm	60°	Active
TLHR5405	Vishay	Red	2V	10mA	14mcd	619nm	5mm, T-1 3/4	12.80mm	60°	Active
5219240F	Dialight	Red	—	10mA	6.3mcd	—	5.00mm Dia	8.94mm	—	Active
5219672F	Dialight	Red	2V	20mA	60mcd	623nm	4.75mm Dia	8.21mm	60°	Active
HLMP-3600-D00B2	Broadcom	Red	5V	10mA	2.1mcd	635nm	—	—	60°	Active
HLMP-D101	Broadcom	Red	1.8V	20mA	70mcd	637nm	5mm, T-1 3/4	9.19mm	65°	Active
HLMP-D150	onsemi	Red	—	—	—	—	—	—	—	Obsolete
LTL-10223W	Lite-On	Red	2V	10mA	60mcd	623nm	4.75mm Dia	7.20mm	60°	Active
LTL-307P	Lite-On	Red	2.1V	20mA	5.6mcd	657nm	5mm, T-1 3/4	8.60mm	50°	Active
LTL-4223	Lite-On	Red	2V	10mA	19mcd	623nm	5mm, T-1 3/4	8.60mm	36°	Active
MV50154	Fairchild	Red	1.6V	10mA	1.5mcd	660nm	5mm, T-1 3/4	6.35mm	50°	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred): TLHR5405 is the closest parametric equivalent, differing only in brightness rating (14mcd vs. 12mcd) while maintaining identical forward voltage (2V), test current (10mA), lens size (5mm T-1 3/4), and viewing angle (60°). Both parts are manufactured by Vishay and carry ROHS3 compliance with unlimited moisture sensitivity.

Compatible Substitutes (Same Electrical Characteristics): LTL-4223 (Lite-On) and LTL-10223W (Lite-On) maintain the 2V forward voltage and 10mA test current specifications. LTL-4223 matches the T-1 3/4 form factor with 19mcd brightness. Both parts are ROHS3 compliant and active in production.

Conditional Substitutes (Voltage or Current Variation): HLMP-D101 (Broadcom) operates at 1.8V forward voltage with 20mA test current, requiring circuit design verification. LTL-307P (Lite-On) operates at 2.1V with 20mA test current. MV50154 (Fairchild) operates at 1.6V with 10mA test current. These parts maintain through-hole radial mounting and red diffused lens characteristics but require confirmation of circuit compatibility.

Not Recommended: HLMP-3600-D00B2 operates at 5V and features right-angle mounting, making it unsuitable for direct substitution. HLMP-D150 is obsolete and should not be selected for new designs. 5219240F lacks specified forward voltage data. 5219672F requires 20mA test current and features different mechanical dimensions.

Frequently Asked Questions (FAQ)

Q: Can TLHR5405 be used as a direct replacement for TLHR5401? A: Yes. TLHR5405 is a direct equivalent with identical electrical parameters (2V, 10mA) and mechanical form factor (5mm T-1 3/4). The only difference is brightness (14mcd vs. 12mcd), which is within the same product family and does not affect circuit compatibility.

Q: What is the primary difference between TLHR5401 and LTL-4223? A: Both parts operate at 2V forward voltage with 10mA test current and feature 5mm T-1 3/4 diffused red lenses. LTL-4223 has a narrower viewing angle (36° vs. 60°) and slightly higher brightness (19mcd vs. 12mcd). Circuit compatibility is maintained; application requirements determine suitability.

Q: Why is HLMP-D101 listed as a conditional substitute? A: HLMP-D101 operates at 1.8V forward voltage and requires 20mA test current, differing from the TLHR5401 specification of 2V and 10mA. While the T-1 3/4 form factor and red diffused lens are compatible, the circuit design must accommodate the lower forward voltage and higher current requirement.

Q: Can parts with different brightness ratings be substituted? A: Brightness variation (millicandela rating) does not affect electrical compatibility. Substitution is valid if forward voltage, test current, and mounting type match. Application requirements determine whether brightness differences are acceptable.

Q: What does "obsolete" status mean for HLMP-D150? A: Obsolete parts are no longer manufactured and should not be selected for new designs. Existing inventory may be available, but long-term supply cannot be guaranteed. Active alternatives should be prioritized.

Q: Are there mechanical dimension constraints for substitution? A: Yes. The TLHR5401 specifies 5mm T-1 3/4 lens size with 12.80mm maximum height. Substitutes with significantly different dimensions (such as 4.75mm lens diameter or 8.21mm height) may require PCB layout verification to ensure proper fit and clearance.

Q: What compliance certifications apply to all listed substitutes? A: All active parts listed carry ROHS3 compliance. Moisture sensitivity levels vary; most are rated MSL 1 (Unlimited), while MV50154 is rated MSL 3 (168 Hours). REACH status varies by manufacturer. Verify specific compliance requirements for your application.

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