TLLR5400 Equivalent & Substitute Parts

Part Overview

The TLLR5400 is a red diffused T-1 3/4 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for indication applications. Specified at 1.9V forward voltage with 1.2mcd brightness at 2mA test current, this component operates at 619nm dominant wavelength with a 50° viewing angle. The part is active in production status and fully ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are necessary when the TLLR5400 reaches end-of-life, when inventory constraints occur, or when design requirements permit operation at different electrical parameters within the same functional category of red LED indication.

Key Parameters

Parameter	TLLR5400 Value	Unit
Color	Red	—
Lens Transparency	Diffused	—
Mounting Type	Through Hole	—
Package / Case	Radial	—
Supplier Device Package	T-1 3/4	—
Voltage - Forward (Vf) Typical	1.9	V
Current - Test	2	mA
Millicandela Rating	1.2	mcd
Wavelength - Dominant	619	nm
Viewing Angle	50	°
Height (Max)	12.80	mm
RoHS Status	ROHS3 Compliant	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitution eligibility for the TLLR5400 is determined by the following criteria:

Primary Compatibility Requirements:

Color: Red
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial

Secondary Electrical Parameters:

Voltage - Forward (Vf): Tolerance range 1.6V to 2.1V
Current - Test: Range 2mA to 20mA
Millicandela Rating: 1.2mcd to 70mcd
Wavelength - Dominant: 619nm to 657nm
Viewing Angle: 36° to 65°

Tertiary Considerations:

Supplier Device Package: T-1 3/4 or 5mm equivalent
Height (Max): 6.35mm to 12.80mm
RoHS Status: ROHS3 Compliant
Product Status: Active preferred; Obsolete acceptable with inventory verification

All substitute parts listed below meet the primary compatibility requirements. Electrical parameter variations are acceptable within the ranges specified, as these represent standard operational tolerances for red LED indication circuits.

Parameter Comparison

Manufacturer	Part Number	Color	Lens Transparency	Vf (Typ) V	Current mA	mcd	Wavelength nm	Viewing Angle °	Package	Height mm	Status
Vishay Semiconductor Opto Division	TLLR5400	Red	Diffused	1.9	2	1.2	619	50	T-1 3/4	12.80	Active
Dialight	5219240F	Red	Diffused	—	10	6.3	—	—	T-1 3/4	8.94	Active
Dialight	5219672F	Red	Diffused	2.0	20	60	623	60	5mm	8.21	Active
Broadcom Limited	HLMP-3600-D00B2	Red	Diffused, Tinted	—	10	2.1	635	60	Right Angle	—	Active
Broadcom Limited	HLMP-4700-C0002	Red	Diffused	1.7	2	2.3	626	50	T-1 3/4	9.19	Active
Broadcom Limited	HLMP-D101	Red	Diffused	1.8	20	70	637	65	T-1 3/4	9.19	Active
onsemi	HLMP-D150	Red	—	—	—	—	—	—	—	—	Obsolete
Lite-On Inc.	LTL-10223W	Red	Diffused	2.0	10	60	623	60	Radial	7.20	Active
Lite-On Inc.	LTL-307P	Red	Diffused	2.1	20	5.6	657	50	T-1 3/4	8.60	Active
Lite-On Inc.	LTL-4223	Red	Diffused	2.0	10	19	623	36	T-1 3/4	8.60	Active
Fairchild Semiconductor	MV50154	Red	Diffused	1.6	10	1.5	—	50	T-1 3/4	6.35	Active

Engineering Selection Recommendations

Closest Electrical Match (Low Current, Low Brightness): HLMP-4700-C0002 (Broadcom Limited) provides the closest electrical alignment to TLLR5400, operating at 1.7V forward voltage with 2mA test current and 2.3mcd brightness. This part maintains T-1 3/4 package compatibility and 50° viewing angle specification. Both parts are ROHS3 compliant and active in production status.

Alternative for T-1 3/4 Package Compatibility: HLMP-D101 (Broadcom Limited) operates in T-1 3/4 package with 1.8V forward voltage and maintains ROHS3 compliance and active status. Higher brightness (70mcd) and test current (20mA) suit applications requiring increased luminous intensity.

5mm Package Alternative: 5219672F (Dialight) and LTL-10223W (Lite-On Inc.) both provide 5mm package options with 60mcd brightness, 2.0V forward voltage, and 10mA test current. These parts are suitable for applications where package form factor permits deviation from T-1 3/4 specification.

Low Forward Voltage Option: MV50154 (Fairchild Semiconductor) operates at 1.6V forward voltage, the lowest among available substitutes, while maintaining T-1 3/4 package and ROHS3 compliance. Suitable for circuits with reduced supply voltage margins.

Obsolete Part Status: HLMP-D150 (onsemi) is listed as obsolete and should not be selected for new designs or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can HLMP-D101 replace TLLR5400 directly in existing circuits? A: HLMP-D101 maintains T-1 3/4 package, through-hole radial mounting, and red diffused lens specification. Forward voltage (1.8V vs. 1.9V) and test current (20mA vs. 2mA) differ; circuit current-limiting resistor values must be recalculated for the higher test current specification.

Q: What is the primary difference between T-1 3/4 and 5mm package LEDs? A: T-1 3/4 refers to a 5.80mm diameter lens with specific height profile (typically 9-13mm), while 5mm package refers to a 5mm diameter lens with shorter height (typically 7-8mm). Both are through-hole radial mount, but mechanical fit in PCB layouts differs. Verify PCB hole spacing and component clearance before substitution.

Q: Are all listed substitutes ROHS3 compliant? A: All active-status parts listed are ROHS3 compliant. LTL-10223W and LTL-307P carry REACH Affected status; verify regulatory requirements for your application region. HLMP-D150 is obsolete and should not be used.

Q: How do wavelength differences affect circuit operation? A: Wavelength differences (619nm to 657nm) represent normal variation within the red LED spectrum and do not affect electrical circuit operation. Visual color perception may vary slightly; if color matching is critical, specify wavelength range in procurement documentation.

Q: Can I use a higher brightness substitute (70mcd vs. 1.2mcd)? A: Yes, if circuit current-limiting design permits. Higher brightness parts require proportionally higher test current. Recalculate series resistor values to maintain safe operating current within the substitute part's rated specification.

Q: What viewing angle considerations apply to substitution? A: Viewing angle (36° to 65°) affects light distribution pattern. Narrower angles (36°) concentrate light in forward direction; wider angles (65°) distribute light over broader area. Select based on application optical requirements; circuit operation is unaffected by viewing angle differences.

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