TLRY4420CU Yellow LED T-1 Equivalent & Substitute Parts

Part Overview

The TLRY4420CU is a yellow 588nm LED indicator manufactured by Vishay Semiconductor Opto Division, configured as a diffused T-1 through-hole component with 10mcd brightness rating and 10V forward voltage. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design requirements and production continuity.

Key Parameters

Parameter	TLRY4420CU
Manufacturer	Vishay Semiconductor Opto Division
Color	Yellow
Wavelength - Dominant	588nm
Wavelength - Peak	585nm
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Millicandela Rating	10mcd
Voltage - Forward (Vf) (Typ)	10V
Viewing Angle	60°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TLRY4420CU is determined by the following critical parameters:

Primary Matching Criteria:

Color: Yellow
Lens Transparency: Diffused
Lens Style: Round with Domed Top
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Wavelength Range: 585–591nm (yellow spectrum)

Secondary Considerations:

Voltage - Forward (Vf): The TLRY4420CU operates at 10V. Substitutes with lower forward voltages (2V–5V) require circuit redesign to accommodate different voltage requirements.
Millicandela Rating: The TLRY4420CU provides 10mcd. Substitutes with higher brightness ratings (20mcd–200mcd) may require current limiting adjustments.
Viewing Angle: The TLRY4420CU has a 60° viewing angle. Substitutes with different angles (30°–120°) affect light distribution characteristics.

Substitute parts are grouped into two categories: parametric equivalents from Vishay (same manufacturer, active status) and manufacturer-recommended alternatives from Everlight Electronics, Bivar Inc., and Broadcom Limited (active status, different electrical characteristics).

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength - Dominant (nm)	Lens Transparency	Lens Size	Millicandela Rating	Vf (Typ)	Viewing Angle	Height (Max)	Product Status
TLRY4420CU	Vishay	Yellow	588	Diffused	3mm, T-1	10mcd	10V	60°	6.10mm	Obsolete
TLHY4400	Vishay	Yellow	588	Diffused	3mm, T-1	10mcd	2.4V	60°	6.10mm	Active
TLHY4401	Vishay	Yellow	588	Diffused	3mm, T-1	10.5mcd	2.4V	60°	6.10mm	Active
TLHY4405	Vishay	Yellow	588	Diffused	3mm, T-1	11mcd	2.4V	60°	6.10mm	Active
1254-10UYD/S530-A3	Everlight Electronics	Yellow	589	Diffused	3.00mm Dia	200mcd	2V	30°	5.20mm	Active
264-7UYD/S530-A3	Everlight Electronics	Yellow	589	Diffused	2.90mm Dia	125mcd	2V	60°	6.20mm	Active
3YD-F	Bivar Inc.	Yellow	—	Diffused	3mm, T-1	20mcd	2V	35°	5.30mm	Active
3YDL-F	Bivar Inc.	Yellow	—	Diffused	3mm, T-1	2mcd	2V	35°	5.30mm	Active
414-10UYD/S530-A3	Everlight Electronics	Yellow	589	Diffused	3.00mm Dia	40mcd	2V	120°	7.00mm	Active
HLMP-1620	Broadcom Limited	Yellow	585	Diffused	3mm, T-1	2.2mcd	5V	60°	6.35mm	Active
HLMP-1620-C00A1	Broadcom Limited	Yellow	583	Diffused, Tinted	3mm, T-1	2.2mcd	5V	60°	—	Active

Engineering Selection Recommendations

Parametric Equivalents (Vishay TLHY Series): TLHY4400, TLHY4401, and TLHY4405 are active-status parametric equivalents from the same manufacturer. These parts maintain identical mechanical form factors and wavelength characteristics but operate at 2.4V forward voltage instead of 10V. Selection among these three depends on brightness requirements: TLHY4400 (10mcd), TLHY4401 (10.5mcd), or TLHY4405 (11mcd). All three are ROHS3 compliant and carry unlimited moisture sensitivity rating.

Manufacturer-Recommended Alternatives: Everlight Electronics, Bivar Inc., and Broadcom Limited alternatives are active-status components suitable for applications where forward voltage and brightness characteristics can be accommodated through circuit redesign. All recommended alternatives are ROHS3 compliant.

Everlight 1254-10UYD/S530-A3 and 264-7UYD/S530-A3: Operate at 2V forward voltage with higher brightness (200mcd and 125mcd respectively). The 264-7UYD/S530-A3 maintains the 60° viewing angle of the original part.
Bivar 3YD-F and 3YDL-F: T-1 form factor at 2V forward voltage. The 3YD-F provides 20mcd brightness; the 3YDL-F provides 2mcd for lower-brightness applications.
Everlight 414-10UYD/S530-A3: Offers 120° wide viewing angle at 2V forward voltage with 40mcd brightness and flat-top lens style.
Broadcom HLMP-1620 and HLMP-1620-C00A1: Operate at 5V forward voltage with 2.2mcd brightness, maintaining T-1 form factor and 60° viewing angle. Both are ROHS3 compliant with unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can TLHY4400, TLHY4401, and TLHY4405 be used as direct replacements for TLRY4420CU?

A: These Vishay parts are mechanically and optically compatible (same lens size, style, transparency, and wavelength). However, they operate at 2.4V forward voltage compared to the TLRY4420CU's 10V. Direct substitution requires circuit redesign to accommodate the lower voltage requirement. Brightness ratings are comparable (10–11mcd).

Q: What is the primary difference between the Everlight and Bivar alternatives?

A: Everlight parts operate at 2V forward voltage with higher brightness ratings (40–200mcd) and offer various viewing angles (30°–120°). Bivar parts also operate at 2V but provide lower brightness options (2–20mcd) and narrower viewing angles (35°). Both maintain the 3mm T-1 form factor.

Q: How do the Broadcom HLMP-1620 series parts compare to the original TLRY4420CU?

A: The HLMP-1620 and HLMP-1620-C00A1 maintain identical mechanical form factor (3mm T-1, round domed top, 60° viewing angle) and wavelength characteristics (583–585nm). They operate at 5V forward voltage with significantly lower brightness (2.2mcd). These parts are suitable for applications where lower brightness is acceptable and 5V operation is feasible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the compliance status of the original TLRY4420CU.

Q: Which substitute offers the closest optical and mechanical match to the TLRY4420CU?

A: TLHY4400, TLHY4401, and TLHY4405 provide the closest match in form factor, lens characteristics, and wavelength. The primary difference is forward voltage (2.4V vs. 10V), which requires circuit modification but does not affect optical performance or mechanical compatibility.

Q: Can I use a higher brightness substitute if my circuit allows it?

A: Yes, provided your circuit design accommodates the different forward voltage and current requirements. Everlight 1254-10UYD/S530-A3 (200mcd) and 414-10UYD/S530-A3 (40mcd) offer significantly higher brightness than the original 10mcd rating. Verify that your current-limiting resistor and power supply can support the increased brightness without exceeding component ratings.

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