SSL-LX5093BYD Yellow LED Equivalent & Substitute Parts

Part Overview

The SSL-LX5093BYD is a yellow diffused LED indicator manufactured by Lumex Opto/Components Inc., classified as a T-1 3/4 through-hole radial component. This part operates at 3V forward voltage with a 20mA test current and features a flashing capability within the QuasarBrite series. The component is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production continuity. Substitute parts must maintain compatibility with through-hole mounting, diffused yellow lens characteristics, and similar optical and electrical performance parameters.

Key Parameters

Parameter	SSL-LX5093BYD Value	Substitution Relevance
Color	Yellow	Critical - Must match
Lens Transparency	Diffused	Critical - Must match
Lens Size	5mm, T-1 3/4	Critical - Physical compatibility
Mounting Type	Through Hole	Critical - PCB assembly method
Voltage - Forward (Vf) (Typ)	3V	Important - Circuit design parameter
Current - Test	20mA	Important - Operating point reference
Millicandela Rating	20mcd	Important - Brightness specification
Viewing Angle	60°	Important - Optical performance
Wavelength - Peak	585nm	Important - Color specification
Features	Flashing	Functional - Operational characteristic
Package / Case	Radial	Critical - Lead configuration
Height (Max)	8.60mm	Important - PCB clearance
RoHS Status	ROHS3 Compliant	Regulatory - Compliance requirement

Substitute Part Grouping Explanation

Substitute parts for the SSL-LX5093BYD are evaluated based on the following substitution criteria:

Primary Matching Criteria (Non-Negotiable):

Color: Yellow
Lens Transparency: Diffused
Lens Size: 5mm, T-1 3/4 form factor
Mounting Type: Through Hole, Radial package
Wavelength - Peak: 585nm ±10nm range (yellow spectrum)

Secondary Matching Criteria (Functional Compatibility):

Voltage - Forward (Vf): 1.8V to 5V acceptable range (circuit design dependent)
Current - Test: 2mA to 20mA acceptable range (brightness vs. power trade-off)
Millicandela Rating: 2mcd to 800mcd (application-dependent brightness requirement)
Viewing Angle: 24° to 70° (application-dependent visibility requirement)
Height (Max): 8.60mm to 9.19mm (PCB clearance tolerance)

Compliance Criteria:

RoHS3 Compliant preferred for new designs
REACH Status: Unaffected or Affected acceptable

Substitutes are grouped into two categories: Direct Yellow LED Substitutes (matching all primary criteria) and Alternative Color Consideration (orange wavelength, same form factor, for applications where color flexibility exists).

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status	RoHS3
SSL-LX5093BYD	Lumex Opto/Components Inc.	Yellow	3V	20mA	20mcd	60°	585nm	8.60mm	Obsolete	Yes
1383UYD/S530-A3	Everlight Electronics Co Ltd	Yellow	2V	20mA	800mcd	25°	591nm	8.90mm	Active	No
HLMP-3650	Broadcom Limited	Yellow	5V	10mA	2.2mcd	60°	583nm	9.19mm	Active	Yes
HLMP-3650-C00B2	Broadcom Limited	Yellow	5V	10mA	2.2mcd	60°	583nm	N/A	Active	Yes
HLMP-4719-A0002	Broadcom Limited	Yellow	1.8V	2mA	2.1mcd	50°	585nm	9.19mm	Active	Yes
LTL-307Y	Lite-On Inc.	Yellow	2.1V	20mA	29mcd	50°	585nm	8.60mm	Active	Yes
MV5354A	onsemi	Yellow	2.1V	20mA	25mcd	24°	585nm	8.89mm	Obsolete	No
MV6351	onsemi	Yellow	2.2V	20mA	12mcd	70°	585nm	8.89mm	Obsolete	No
MV6354A	onsemi	Yellow	2.1V	20mA	25mcd	24°	585nm	8.89mm	Obsolete	No
SLR-56DU3F	Rohm Semiconductor	Orange	2V	10mA	10mcd	40°	605nm	8.90mm	Active	Yes
SLR-56DUT32	Rohm Semiconductor	Orange	2V	10mA	10mcd	40°	605nm	8.90mm	Active	Yes

Engineering Selection Recommendations

Recommended Primary Substitutes (Yellow LED, Active Status, RoHS3 Compliant):

LTL-307Y (Lite-On Inc.) is the preferred substitute for direct replacement. This part matches the SSL-LX5093BYD across all critical parameters: yellow color, diffused lens, 5mm T-1 3/4 form factor, through-hole radial mounting, and 585nm peak wavelength. Operating at 2.1V forward voltage with 20mA test current, it delivers 29mcd brightness at a 50° viewing angle. Height specification of 8.60mm matches the original exactly. RoHS3 compliance and REACH Affected status support regulatory requirements for new production.

HLMP-3650 (Broadcom Limited) provides an alternative with active product status and RoHS3 compliance. This part maintains yellow color, diffused lens, and 5mm T-1 3/4 form factor. However, it operates at 5V forward voltage with reduced 10mA test current and lower 2.2mcd brightness. The 60° viewing angle matches the original. Circuit redesign may be required to accommodate the higher voltage specification. Height of 9.19mm represents a 0.59mm increase.

HLMP-4719-A0002 (Broadcom Limited) offers low-power operation at 1.8V forward voltage with 2mA test current, suitable for battery-powered applications. Yellow color, diffused lens, and 5mm T-1 3/4 form factor are maintained. Brightness of 2.1mcd and 50° viewing angle represent reduced optical performance. RoHS3 compliant. Height of 9.19mm requires PCB clearance verification.

Secondary Substitutes (Yellow LED, Obsolete Status, Non-RoHS3):

MV5354A and MV6354A (onsemi) are obsolete yellow LEDs with 2.1V forward voltage, 20mA test current, and 25mcd brightness matching the original specification closely. Both maintain 5mm T-1 3/4 form factor and 585nm wavelength. MV5354A provides 24° viewing angle; MV6351 provides 70° viewing angle for broader illumination. These parts lack RoHS3 compliance and are not recommended for new designs.

Alternative Color Consideration (Orange LED, Active Status):

SLR-56DU3F and SLR-56DUT32 (Rohm Semiconductor) are orange LEDs (605nm wavelength) with identical form factor, through-hole mounting, and active product status with RoHS3 compliance. These parts operate at 2V forward voltage with 10mA test current and 10mcd brightness. Selection is appropriate only when application requirements permit orange color substitution for yellow indication.

Compliance Summary:

New designs: Select from LTL-307Y, HLMP-3650, HLMP-4719-A0002, or SLR-56DU3F/SLR-56DUT32
Legacy support: MV5354A, MV6351, MV6354A available but not recommended for new production
All recommended substitutes maintain through-hole radial package compatibility and diffused lens characteristics

Frequently Asked Questions (FAQ)

Q: Can the SSL-LX5093BYD be directly replaced with any of these substitutes without circuit modification?

A: LTL-307Y provides the closest electrical match with 2.1V forward voltage, requiring minimal circuit adjustment from the original 3V specification. HLMP-3650 requires circuit redesign due to 5V forward voltage requirement. HLMP-4719-A0002 operates at 1.8V, suitable for low-power applications. Verify circuit current-limiting resistor values for each substitute.

Q: What is the difference between the yellow LED substitutes in terms of brightness?

A: Brightness varies significantly across substitutes. LTL-307Y delivers 29mcd, closest to the original 20mcd. MV5354A and MV6354A provide 25mcd. HLMP-3650 and HLMP-4719-A0002 deliver only 2.2mcd and 2.1mcd respectively, representing substantial brightness reduction. 1383UYD/S530-A3 provides 800mcd, significantly brighter. Select based on application visibility requirements.

Q: Are the orange LED substitutes (SLR-56DU3F, SLR-56DUT32) compatible with yellow LED applications?

A: Orange LEDs are mechanically and electrically compatible with the same through-hole mounting and form factor. However, they emit at 605nm wavelength instead of 585nm yellow. Use only when application design permits orange color substitution or when color-blind operation is acceptable.

Q: What is the significance of the viewing angle differences among substitutes?

A: Viewing angle determines the cone of light emission. The original SSL-LX5093BYD provides 60° viewing angle. LTL-307Y and HLMP-3650 maintain 60°. MV5354A and MV6354A narrow to 24°, concentrating light in a tighter beam. MV6351 widens to 70°. Select based on application requirements for light distribution and visibility from different angles.

Q: Why do some substitutes have lower millicandela ratings than the original?

A: Brightness reduction reflects different LED chip designs and current specifications. HLMP-3650 and HLMP-4719-A0002 operate at lower test currents (10mA and 2mA respectively) compared to the original 20mA, resulting in lower brightness output. These parts are suitable for applications where reduced brightness is acceptable or preferred for power efficiency.

Q: Is RoHS3 compliance important for substitute selection?

A: RoHS3 compliance is mandatory for new designs and production in regulated markets. LTL-307Y, HLMP-3650, HLMP-4719-A0002, SLR-56DU3F, and SLR-56DUT32 are RoHS3 compliant. Obsolete parts (MV5354A, MV6351, MV6354A) lack this certification and are not recommended for new production, though they may be acceptable for legacy system repairs.

Q: What is the impact of height differences on PCB assembly?

A: The original SSL-LX5093BYD specifies 8.60mm maximum height. LTL-307Y matches this exactly. HLMP-3650 and HLMP-4719-A0002 reach 9.19mm, a 0.59mm increase. MV5354A, MV6354A, and SLR-56DU3F reach 8.89-8.90mm. Verify PCB clearance for components mounted above or adjacent to the LED to prevent mechanical interference.

Q: Can the flashing feature of the SSL-LX5093BYD be replicated with these substitutes?

A: The original part includes internal flashing circuitry. None of the listed substitutes specify flashing capability. Flashing functionality must be implemented externally through circuit design using a timer or microcontroller if required in the replacement design.

Q: Which substitute offers the best balance of active status, compliance, and electrical compatibility?

A: LTL-307Y (Lite-On Inc.) provides optimal balance: active product status, RoHS3 compliance, 2.1V forward voltage close to the original 3V, 20mA test current matching the original, 29mcd brightness near the original 20mcd, and identical 8.60mm height. This part is the primary recommendation for direct replacement applications.

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