TLHR6405 Equivalent & Substitute Parts

Part Overview

The TLHR6405 is a red diffused T-1 3/4 through-hole LED manufactured by Vishay Semiconductor Opto Division. This discrete indicator LED operates at 2V forward voltage with a 14mcd brightness rating and 619nm dominant wavelength. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while preserving the core indication function in through-hole applications.

Key Parameters

Parameter	TLHR6405 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Red
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	14mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	619nm
Wavelength - Peak	635nm
Package / Case	Radial
Supplier Device Package	T-1 3/4
Height (Max)	9.10mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Parameters:

Mounting Type: Through Hole (radial configuration)
Lens Size: 5mm, T-1 3/4 form factor
Color: Red
Lens Transparency: Diffused
Package / Case: Radial

Electrical Operating Parameters:

Voltage - Forward (Vf): 1.9V to 2V range
Current - Test: 10mA nominal
Wavelength - Peak: 635nm region

Regulatory Compliance:

RoHS3 Compliant
REACH Unaffected
Product Status: Active

Substitute parts are grouped into two categories based on brightness compatibility:

Group A - Direct Brightness Equivalents (5.4mcd): HLMP-3301-F00DD, HLMP-3351, HLMP-3351-D0000, HLMP-3351-D0002. These parts operate at 1.9V forward voltage with 10mA test current and maintain the T-1 3/4 through-hole radial package. Brightness is lower than the primary part but maintains diffused lens characteristics and 50-60° viewing angles.

Group B - Alternative Brightness Options: 5219240F (6.3mcd), 5219672F (60mcd), HLMP-3301-F00B2 (5.4mcd right-angle), HLMP-3600-D00B2 (2.1mcd right-angle), HLMP-C115 (600mcd clear lens), HLMP-C215 (300mcd clear lens). These parts maintain T-1 3/4 or 5mm form factors with through-hole mounting but vary in brightness, voltage, or lens transparency characteristics.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Mounting Type	Package	Height (Max)	RoHS Status
TLHR6405	Vishay	Red	Diffused	2V	10mA	14mcd	60°	635nm	Through Hole	T-1 3/4	9.10mm	ROHS3
5219240F	Dialight	Red	Diffused	—	10mA	6.3mcd	—	—	Through Hole	T-1 3/4	8.94mm	ROHS3
5219672F	Dialight	Red	Diffused	2V	20mA	60mcd	60°	635nm	Through Hole	5mm	8.21mm	ROHS3
HLMP-3301-F00B2	Broadcom	Red	Diffused, Tinted	1.9V	10mA	5.4mcd	—	635nm	Through Hole, Right Angle	5mm	—	ROHS3
HLMP-3301-F00DD	Broadcom	Red	Diffused	1.9V	10mA	5.4mcd	60°	635nm	Through Hole	T-1 3/4	9.19mm	ROHS3
HLMP-3351	Broadcom	Red	Diffused	1.9V	10mA	5.4mcd	50°	635nm	Through Hole	T-1 3/4	6.35mm	ROHS3
HLMP-3351-D0000	Broadcom	Red	Diffused	1.9V	10mA	2.1mcd	50°	635nm	Through Hole	T-1 3/4	6.35mm	ROHS3
HLMP-3351-D0002	Broadcom	Red	Diffused	1.9V	10mA	2.1mcd	50°	635nm	Through Hole	T-1 3/4	6.35mm	ROHS3
HLMP-3600-D00B2	Broadcom	Red	Diffused, Tinted	5V	10mA	2.1mcd	60°	635nm	Through Hole, Right Angle	5mm	—	ROHS3
HLMP-C115	Broadcom	Red	Clear	1.8V	20mA	600mcd	15°	660nm	Through Hole	T-1 3/4	8.91mm	ROHS3
HLMP-C215	Broadcom	Red	Clear	1.9V	20mA	300mcd	15°	632nm	Through Hole	T-1 3/4	8.91mm	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the TLHR6405.

For applications requiring closest electrical and mechanical compatibility with the TLHR6405, HLMP-3301-F00DD and HLMP-3351 are preferred. Both maintain T-1 3/4 through-hole radial mounting, 1.9V forward voltage, 10mA test current, and diffused lens characteristics. HLMP-3301-F00DD provides 60° viewing angle matching the primary part. HLMP-3351 offers reduced height (6.35mm vs 9.10mm) with 50° viewing angle and equivalent 5.4mcd brightness.

For applications where brightness adjustment is acceptable, HLMP-3351-D0000 and HLMP-3351-D0002 provide 2.1mcd output in identical T-1 3/4 packages with matching electrical parameters.

Dialight 5219240F maintains T-1 3/4 form factor and 10mA test current but provides lower brightness (6.3mcd) and does not specify forward voltage.

Dialight 5219672F operates at 2V forward voltage with 60° viewing angle but requires 20mA test current and uses 5mm package form factor rather than T-1 3/4.

Right-angle mounting variants (HLMP-3301-F00B2, HLMP-3600-D00B2) are suitable only for applications requiring board-level right-angle orientation. HLMP-3600-D00B2 operates at 5V and is not recommended for 2V circuit designs.

Clear lens variants (HLMP-C115, HLMP-C215) operate at higher brightness levels (300-600mcd) with narrower viewing angles (15°) and are suitable only for applications requiring high intensity or narrow beam characteristics.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3351 directly replace TLHR6405 in a 2V circuit?

A: HLMP-3351 operates at 1.9V forward voltage, which is compatible with 2V supply circuits. The 0.1V difference is within typical LED operating tolerance. Both parts maintain 10mA test current and T-1 3/4 through-hole radial mounting. Brightness is lower (5.4mcd vs 14mcd) and viewing angle is narrower (50° vs 60°).

Q: What is the difference between HLMP-3351, HLMP-3351-D0000, and HLMP-3351-D0002?

A: All three parts share identical electrical parameters (1.9V, 10mA), package (T-1 3/4), and mounting type (through-hole radial). HLMP-3351 and HLMP-3351-D0000 differ only in brightness rating (5.4mcd vs 2.1mcd). HLMP-3351-D0002 is electrically identical to HLMP-3351-D0000 but supplied in Cut Tape packaging rather than Bulk.

Q: Why do some substitutes specify different forward voltages?

A: Forward voltage variation (1.8V to 2V) reflects manufacturing differences across LED suppliers. All listed substitutes operate within the standard red LED voltage range and are compatible with 2V supply designs. Circuit design should accommodate ±0.2V tolerance.

Q: Can HLMP-C115 or HLMP-C215 replace TLHR6405?

A: These parts are not recommended as direct replacements. Both use clear lens construction rather than diffused, resulting in 15° narrow viewing angles versus 60° diffused performance. Brightness is significantly higher (300-600mcd vs 14mcd), requiring circuit redesign. These parts are suitable only for applications requiring high-intensity narrow-beam indication.

Q: What is the impact of different test currents (10mA vs 20mA)?

A: Test current specification indicates the standard operating point for brightness measurement. Parts specified at 20mA (5219672F, HLMP-C115, HLMP-C215) require higher circuit current and generate more heat. For 10mA circuit designs, use parts specified at 10mA test current.

Q: Are right-angle mounting variants compatible with through-hole radial designs?

A: No. Right-angle variants (HLMP-3301-F00B2, HLMP-3600-D00B2) are designed for board-level perpendicular mounting and cannot be used in radial through-hole applications without mechanical modification.

Q: Does package form factor affect interchangeability?

A: Yes. T-1 3/4 and 5mm packages have different physical dimensions and lead spacing. T-1 3/4 parts (TLHR6405, HLMP-3301-F00DD, HLMP-3351) are directly interchangeable in T-1 3/4 PCB footprints. 5mm parts (5219672F, HLMP-3301-F00B2) require 5mm footprints and cannot be used in T-1 3/4 holes without mechanical adaptation.

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