TLHR6400 Equivalent & Substitute Parts

Part Overview

The TLHR6400 is a red diffused T-1 3/4 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for indication applications. Specified at 2V forward voltage, 10mA test current, and 10mcd brightness, this component operates at 619nm dominant wavelength with a 60° viewing angle. The part is Active status and ROHS3 compliant. Substitute parts may be required due to inventory constraints, design optimization, or application-specific performance requirements while maintaining functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	TLHR6400 Value
Color	Red
Lens Transparency	Diffused
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	10mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	619nm
Package / Case	Radial
Height (Max)	9.10mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Parameters:

Color: Red
Mounting Type: Through Hole
Package / Case: Radial
Lens Transparency: Diffused
Lens Size: 5mm, T-1 3/4 or equivalent
Voltage - Forward (Vf): 2V nominal
Current - Test: 10mA nominal
RoHS Status: ROHS3 Compliant

Secondary Consideration Parameters:

Millicandela Rating: 10mcd baseline
Viewing Angle: 60° baseline
Wavelength - Dominant: 619nm baseline
Height (Max): 9.10mm baseline

Substitute parts are grouped by adherence to primary parameters. Variations in secondary parameters (brightness, viewing angle, wavelength) are acceptable within the same functional category provided the primary electrical and mechanical specifications align.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	mcd	Viewing Angle	Wavelength - Dominant	Mounting Type	Height (Max)	RoHS Status	Product Status
TLHR6400	Vishay	Red	Diffused	5mm, T-1 3/4	2V	10mA	10	60°	619nm	Through Hole	9.10mm	ROHS3	Active
TLHR6401	Vishay	Red	Diffused	5mm, T-1 3/4	2V	10mA	12	60°	619nm	Through Hole	9.10mm	ROHS3	Active
5219240F	Dialight	Red	Diffused	5.00mm Dia	—	10mA	6.3	—	—	Through Hole	8.94mm	ROHS3	Active
5219672F	Dialight	Red	Diffused	4.75mm Dia	2V	20mA	60	60°	623nm	Through Hole	8.21mm	ROHS3	Active
HLMP-3301-F00B2	Broadcom	Red	Diffused, Tinted	—	1.9V	10mA	5.4	—	635nm	Through Hole, Right Angle	—	ROHS3	Active
HLMP-3600-D00B2	Broadcom	Red	Diffused, Tinted	—	5V	10mA	2.1	60°	635nm	Through Hole, Right Angle	—	ROHS3	Active
HLMP-C115	Broadcom	Red	Clear	5mm, T-1 3/4	1.8V	20mA	600	15°	640nm	Through Hole	8.91mm	ROHS3	Active
HLMP-C215	Broadcom	Red	Clear	5mm, T-1 3/4	1.9V	20mA	300	15°	626nm	Through Hole	8.91mm	ROHS3	Active
HLMP-C223	Broadcom	Red	Clear	5mm, T-1 3/4	1.9V	20mA	170	25°	626nm	Through Hole	8.91mm	ROHS3	Active
HLMP-D101	Broadcom	Red	Diffused	5mm, T-1 3/4	1.8V	20mA	70	65°	637nm	Through Hole	9.19mm	ROHS3	Active
HLMP-D150	onsemi	Red	—	—	—	—	—	—	—	—	—	ROHS3	Obsolete

Engineering Selection Recommendations

Direct Parametric Equivalent: TLHR6401 is the closest parametric equivalent, matching all primary specifications with identical forward voltage (2V), test current (10mA), lens size (5mm T-1 3/4), and diffused transparency. The 12mcd brightness represents a minor increase from the 10mcd baseline. Both parts are Active status and ROHS3 compliant.

Vishay Series Alternatives: Within the Vishay Semiconductor Opto Division product line, TLHR6401 maintains full compatibility with TLHR6400 in radial through-hole configuration and electrical characteristics.

Cross-Manufacturer Alternatives: Dialight 5219240F and Broadcom HLMP-D101 provide diffused red through-hole options with compatible mounting. However, 5219240F operates at unspecified forward voltage and lower brightness (6.3mcd). HLMP-D101 operates at 1.8V forward voltage and 20mA test current, requiring circuit design verification.

Not Recommended for Direct Substitution:

5219672F: Operates at 20mA test current (double the baseline) and 60mcd brightness, requiring circuit redesign
HLMP-3301-F00B2 and HLMP-3600-D00B2: Right-angle mounting configuration differs from radial specification
HLMP-C115, HLMP-C215, HLMP-C223: Clear lens transparency differs from diffused specification; higher brightness ratings (170–600mcd) indicate different application class
HLMP-D150: Obsolete status; insufficient parameter data provided

All recommended alternatives maintain ROHS3 compliance and Active product status.

Frequently Asked Questions (FAQ)

Q: Can TLHR6401 replace TLHR6400 without circuit modification? A: Yes. TLHR6401 matches all primary electrical parameters: 2V forward voltage, 10mA test current, and identical lens size (5mm T-1 3/4). The 12mcd brightness is within acceptable variation for indication applications.

Q: Why are Broadcom HLMP-C series parts not suitable substitutes? A: HLMP-C series parts feature clear lens transparency, not diffused. This changes the optical characteristics and light distribution pattern. Additionally, they operate at 1.8–1.9V forward voltage and 20mA test current, requiring circuit redesign.

Q: What is the difference between diffused and clear lens transparency? A: Diffused lenses scatter light over a wider area with lower peak intensity, suitable for general indication. Clear lenses concentrate light with higher intensity and narrower viewing angle, suitable for directional indication. These are not interchangeable without application verification.

Q: Can HLMP-D101 be used as a substitute? A: HLMP-D101 provides diffused red through-hole mounting compatible with the TLHR6400 form factor. However, it operates at 1.8V forward voltage and 20mA test current (versus 2V and 10mA). Circuit design verification is required to confirm compatibility with existing current-limiting resistor values.

Q: Is HLMP-D150 available for new designs? A: No. HLMP-D150 is marked Obsolete and lacks complete parameter documentation. It is not recommended for new designs or as a substitute.

Q: What mounting differences exist between radial and right-angle packages? A: Radial packages (TLHR6400, TLHR6401) have leads extending perpendicular to the lens, suitable for vertical PCB mounting. Right-angle packages (HLMP-3301-F00B2, HLMP-3600-D00B2) have leads bent 90°, suitable for horizontal PCB mounting. These are not mechanically interchangeable without board redesign.

Q: Are all listed substitutes ROHS3 compliant? A: Yes. All Active status parts listed are ROHS3 compliant. HLMP-D150 (Obsolete) is also ROHS3 compliant but is not recommended for use.

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