TLHR4205 Equivalent & Substitute Parts

Part Overview

The TLHR4205 is a red LED indication component manufactured by Vishay Semiconductor Opto Division. This T-1 through-hole radial LED operates at 2V forward voltage with a 15mcd brightness rating and 619nm dominant wavelength. The component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary component becomes unavailable, when alternative packaging formats are required, or when design revisions call for components with different electrical or mechanical characteristics within acceptable tolerance ranges.

Key Parameters

Parameter	TLHR4205 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Red
Lens Transparency	Clear
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	2V
Current - Test	10mA
Millicandela Rating	15mcd
Viewing Angle	44°
Wavelength - Dominant	619nm
Wavelength - Peak	635nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the TLHR4205 is determined by the following critical parameters:

Primary Compatibility Criteria:

Color: Red
Lens Transparency: Clear
Mounting Type: Through Hole
Package / Case: Radial
Lens Style: Round with Domed Top
Lens Size: 3mm, T-1 (or equivalent 3mm diameter)

Electrical Operating Range:

Voltage - Forward (Vf): 1.9V to 2.1V
Current - Test: 10mA to 20mA
Millicandela Rating: 10mcd to 30mcd
Viewing Angle: 30° to 85°
Wavelength - Dominant: 617nm to 630nm

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1 (Unlimited)
Mounting configuration: Through-hole radial

All substitute parts listed meet these criteria and are therefore electrically and mechanically compatible with the TLHR4205 in standard indication circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Dominant	Height (Max)	Packaging	Product Status
TLHR4205	Vishay Semiconductor Opto Division	2V	10mA	15mcd	44°	619nm	6.10mm	Bulk	Active
5219432F	Dialight	—	20mA	29mcd	—	—	5.89mm	Bulk	Active
HLMP-1321	Broadcom Limited	1.9V	10mA	30mcd	45°	626nm	6.35mm	Bulk	Active
HLMP-1321-G0002	Broadcom Limited	1.9V	10mA	30mcd	45°	626nm	6.35mm	Cut Tape (CT)	Active
HLMP-Y301-F0000	Broadcom Limited	2.1V	20mA	19mcd	45°	626nm	5.20mm	Bulk	Active
LTL-1CHEE	Lite-On Inc.	2V	20mA	19mcd	45°	625nm	5.20mm	Bulk	Active
LTL-4222N	Lite-On Inc.	2V	10mA	29mcd	45°	623nm	5.85mm	Bulk	Active
SLR-332VC3F	Rohm Semiconductor	2V	10mA	10mcd	85°	630nm	4.60mm	Bulk	Active
SLR-342VCTB7	Rohm Semiconductor	2V	10mA	25mcd	40°	—	5.40mm	Tape & Box (TB)	Not For New Designs
SSL-LX3044IT	Lumex Opto/Components Inc.	2.1V	20mA	30mcd	30°	—	4.60mm	Bulk	Active
WP132XIT	Kingbright	2V	20mA	20mcd	50°	617nm	5.20mm	Bulk	Active

Engineering Selection Recommendations

For New Designs: Select from parts with Active product status: HLMP-1321, HLMP-1321-G0002, HLMP-Y301-F0000, LTL-1CHEE, LTL-4222N, SLR-332VC3F, SSL-LX3044IT, WP132XIT, 5219432F, or TLHR4205.

For Existing Design Continuity: HLMP-1321 and LTL-4222N provide the closest electrical match to TLHR4205, with 30mcd and 29mcd brightness ratings respectively, both operating at 10mA test current and compatible forward voltages.

For Packaging Flexibility: HLMP-1321-G0002 offers the same electrical specifications as HLMP-1321 but in Cut Tape (CT) packaging for automated assembly processes.

For Compact PCB Layouts: SLR-332VC3F and SSL-LX3044IT provide reduced height profiles (4.60mm) compared to TLHR4205 (6.10mm) while maintaining electrical compatibility.

Avoid for New Designs: SLR-342VCTB7 carries "Not For New Designs" status and should only be used for legacy system maintenance or replacement applications.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1321 directly replace TLHR4205 without circuit modification? A: Yes. HLMP-1321 operates at 1.9V forward voltage versus TLHR4205 at 2V, both at 10mA test current. This 0.1V difference is within standard LED circuit tolerance and requires no design changes for typical indication applications.

Q: What is the difference between HLMP-1321 and HLMP-1321-G0002? A: Both parts are electrically identical. HLMP-1321 is supplied in Bulk packaging, while HLMP-1321-G0002 is supplied in Cut Tape (CT) format. Select based on assembly process requirements.

Q: Why do some substitute parts have higher millicandela ratings? A: Brightness variation (10mcd to 30mcd) reflects different LED die designs and optical configurations. Higher brightness parts (HLMP-1321, LTL-4222N, SSL-LX3044IT at 29-30mcd) provide enhanced visibility compared to TLHR4205 (15mcd) while maintaining compatible electrical parameters.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts meet ROHS3 compliance requirements and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching TLHR4205 environmental specifications.

Q: What viewing angle differences exist among substitutes? A: Viewing angles range from 30° (SSL-LX3044IT) to 85° (SLR-332VC3F). TLHR4205 specifies 44°. Select based on application requirements: narrower angles (30-44°) for focused indication, wider angles (50-85°) for broad visibility applications.

Q: Can I use 20mA test current parts as direct replacements? A: Yes, if your circuit design supports 20mA operation. Parts rated for 20mA test current (5219432F, HLMP-Y301-F0000, LTL-1CHEE, SSL-LX3044IT, WP132XIT) are compatible with TLHR4205 in circuits designed for higher current operation. Verify circuit current limiting resistor values.

Q: Which substitute offers the smallest PCB footprint? A: SLR-332VC3F and SSL-LX3044IT both provide 4.60mm maximum height, reducing vertical clearance requirements by 1.5mm compared to TLHR4205 (6.10mm).

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