EFY5366X LED Yellow Clear 5MM Round T/H Equivalent & Substitute Parts

Part Overview

The EFY5366X is a yellow 590nm LED indication component manufactured by Stanley Electric Co, designed for through-hole mounting in discrete applications. This part operates at 1.9V forward voltage with a 4000mcd brightness rating and features a 10° viewing angle in a standard 5mm round domed lens package.

The EFY5366X is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

EFY5366X

Stanley Electric CoIn Stock: 801EFY5366X Datasheet

Current PartRFQ

383-2UYC/S400-A6

Everlight Electronics Co LtdIn Stock: 1149383-2UYC/S400-A6 Datasheet

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383-2UYC/S400-A7

Everlight Electronics Co LtdIn Stock: 820383-2UYC/S400-A7 Datasheet

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383-2UYC/S400-A9

Everlight Electronics Co LtdIn Stock: 799383-2UYC/S400-A9 Datasheet

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383-2UYC/S530-A3

Everlight Electronics Co LtdIn Stock: 984383-2UYC/S530-A3 Datasheet

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383-2UYC/S530-A4

Everlight Electronics Co LtdIn Stock: 694383-2UYC/S530-A4 Datasheet

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HLMP-EJ37-R0PDD

Broadcom LimitedIn Stock: 1062HLMP-EJ37-R0PDD Datasheet

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SLI-580DT3F

Rohm SemiconductorIn Stock: 1963SLI-580DT3F Datasheet

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SLI-580YT3F

Rohm SemiconductorIn Stock: 1504SLI-580YT3F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EFY5366X are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Color: Yellow (590nm wavelength range)
• Mounting Type: Through Hole
• Lens Size: 5mm, T-1 3/4 form factor
• Voltage - Forward (Vf): 1.9V to 2.0V range
• Current - Test: 20mA
• Package / Case: Radial configuration

Substitution Logic:

Parts are classified into two groups based on wavelength and forward voltage alignment:

Group 1 - Direct Yellow LED Substitutes (589-592nm, 2.0V Vf): Everlight Electronics Co Ltd parts 383-2UYC/S400-A6, 383-2UYC/S400-A7, 383-2UYC/S400-A9, and 383-2UYC/S530-A3, 383-2UYC/S530-A4. These maintain yellow color specification with wavelengths within the yellow spectrum (589nm dominant) and operate at 2.0V forward voltage. All are active products with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Group 2 - Alternative Color LED Substitutes (Orange/Yellow, 1.9-1.98V Vf): Broadcom Limited HLMP-EJ37-R0PDD (orange, 609nm), Rohm Semiconductor SLI-580DT3F (orange, 605nm), and SLI-580YT3F (yellow, 587nm). These parts maintain the 1.9V forward voltage characteristic and 5mm T-1 3/4 form factor but operate in the orange-to-yellow spectrum range. All are active products with ROHS3 compliance.

Substitution within each group is determined by matching the dominant wavelength range, forward voltage tolerance, brightness rating requirements, and viewing angle specifications for the target application.

Parameter Comparison

Engineering Selection Recommendations

For Direct Yellow LED Substitution (Preferred for Color-Critical Applications):

The Everlight Electronics Co Ltd 383-2UYC series parts (383-2UYC/S400-A6, 383-2UYC/S400-A7, 383-2UYC/S400-A9, 383-2UYC/S530-A3, 383-2UYC/S530-A4) are active products with ROHS3 compliance and MSL 1 rating. These parts maintain yellow color specification within the 589-591nm wavelength range, matching the EFY5366X color intent. Forward voltage is 2.0V, representing a 0.1V increase from the EFY5366X 1.9V specification. All parts support 20mA test current and through-hole radial mounting.

Selection within this group depends on brightness requirements: 383-2UYC/S530-A3 (4263mcd) provides closest brightness match to the EFY5366X (4000mcd); 383-2UYC/S400-A6 (8000mcd), 383-2UYC/S400-A7 (8500mcd), and 383-2UYC/S400-A9 (10000mcd) offer increased brightness; 383-2UYC/S530-A4 (6300mcd) provides intermediate brightness. All Everlight parts feature 6° viewing angle compared to the EFY5366X 10° angle.

For Alternative Color Substitution (When Yellow Specification is Flexible):

The Rohm Semiconductor SLI-580YT3F maintains yellow color (587nm dominant wavelength) with 1.9V forward voltage matching the EFY5366X specification exactly. This part is active with ROHS3 compliance, MSL 1 rating, 5000mcd brightness, and 10° viewing angle identical to the EFY5366X. Height is 8.70mm compared to 8.80mm for the main part.

The Rohm Semiconductor SLI-580DT3F operates at 1.9V with 5000mcd brightness and 10° viewing angle but produces orange light (605nm dominant wavelength). This part is suitable only when orange indication is acceptable in the application.

The Broadcom Limited HLMP-EJ37-R0PDD operates at 1.98V forward voltage with orange color (609nm) and 1700mcd brightness. This part is active with ROHS3 compliance but provides significantly lower brightness than the EFY5366X.

Compliance and Supply Considerations:

All substitute parts are active products with ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, supporting modern manufacturing and storage requirements. The EFY5366X obsolete status necessitates transition to active alternatives. Everlight Electronics Co Ltd parts offer the highest inventory availability (644–1128 pcs) among yellow LED options. Rohm Semiconductor parts provide 1452–1902 pcs inventory. Broadcom Limited HLMP-EJ37-R0PDD provides 1003 pcs inventory.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the EFY5366X with any of the Everlight 383-2UYC series parts?

A: Yes, the Everlight 383-2UYC series parts are direct yellow LED substitutes. All maintain 5mm T-1 3/4 through-hole radial mounting, 20mA test current, and yellow color specification (589-591nm wavelength). The primary differences are forward voltage (2.0V vs. 1.9V), viewing angle (6° vs. 10°), and brightness ratings. Circuit design must accommodate the 0.1V higher forward voltage. Applications requiring 10° viewing angle should use SLI-580YT3F instead.

Q: What is the difference between the Everlight 383-2UYC/S400 and 383-2UYC/S530 series?

A: Both series are yellow LEDs with identical wavelength (589nm dominant, 591nm peak), forward voltage (2.0V), and viewing angle (6°). The primary difference is brightness: S400 series offers 8000mcd (A6), 8500mcd (A7), and 10000mcd (A9); S530 series offers 4263mcd (A3) and 6300mcd (A4). Select based on required brightness for the application. The S530-A3 (4263mcd) provides closest brightness match to the EFY5366X (4000mcd).

Q: Why do the Rohm SLI-580 parts have different colors (yellow vs. orange)?

A: The Rohm SLI-580 series uses the same base product platform with different lens and die configurations. SLI-580YT3F produces yellow light (587nm dominant wavelength), while SLI-580DT3F produces orange light (605nm dominant wavelength). Both operate at identical 1.9V forward voltage, 20mA test current, 5000mcd brightness, and 10° viewing angle. Select based on required color for the application.

Q: Can I use the Broadcom HLMP-EJ37-R0PDD as a substitute for the EFY5366X?

A: The Broadcom HLMP-EJ37-R0PDD is not recommended as a primary substitute. While it maintains 5mm T-1 3/4 through-hole radial mounting and operates at 1.98V forward voltage (compatible with the EFY5366X 1.9V), it produces orange light (609nm) instead of yellow and provides only 1700mcd brightness compared to the EFY5366X 4000mcd. Use only when orange indication is acceptable and lower brightness is sufficient.

Q: What is the impact of the 0.1V forward voltage difference between the EFY5366X (1.9V) and Everlight 383-2UYC parts (2.0V)?

A: The 0.1V difference requires circuit recalculation for series resistor values if the EFY5366X was used with a current-limiting resistor. For a given supply voltage, the higher forward voltage of the Everlight parts results in slightly higher voltage drop across the LED and lower voltage across the series resistor, reducing current slightly. Recalculate the series resistor using Ohm's law: R = (Vsupply − Vf) / Iled. For most applications, this difference is minor and may not require circuit modification if the original design included adequate margin.

Q: How do viewing angles affect substitution?

A: The EFY5366X features a 10° viewing angle, while most Everlight 383-2UYC parts feature 6° viewing angle. A narrower viewing angle concentrates light in a smaller cone, increasing brightness in the direct viewing direction but reducing visibility at angles. For applications requiring wide-angle indication, the Rohm SLI-580YT3F (10° viewing angle) or SLI-580DT3F (10° viewing angle) are preferred. For applications requiring concentrated light output, the narrower 6° Everlight parts are suitable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant. The EFY5366X product status does not specify RoHS compliance. All active substitute parts meet modern environmental and regulatory requirements for manufacturing and distribution.

Q: What is MSL 1 (Unlimited) moisture sensitivity rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life under standard storage conditions without requiring special moisture control or baking procedures before soldering. This is the least restrictive moisture sensitivity level and simplifies inventory management and manufacturing logistics compared to higher MSL ratings.