EFA5364X LED Orange Clear 5MM Round T/H Equivalent & Substitute Parts

Part Overview

The EFA5364X is an orange 605nm LED indication component manufactured by Stanley Electric Co, configured as a discrete 1.9V radial through-hole device in a 5mm T-1 3/4 round domed lens package. This part is classified as obsolete, necessitating identification of functionally equivalent substitute components for new procurement and design continuity. Substitute parts must maintain compatibility across mounting type, lens size, color specification, and electrical operating parameters to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	EFA5364X Value	Substitution Criticality
Color	Orange	Critical
Wavelength - Dominant	605nm	Critical
Lens Size	5mm, T-1 3/4	Critical
Mounting Type	Through Hole	Critical
Voltage - Forward (Vf) (Typ)	1.9V	High
Current - Test	20mA	High
Lens Transparency	Clear	High
Millicandela Rating	1560mcd	Medium
Viewing Angle	35°	Medium
Height (Max)	8.80mm	Medium

Substitute Part Grouping Explanation

Substitute parts for the EFA5364X are grouped into two categories based on substitution compatibility:

Category A: Direct Orange 605nm Substitutes These parts maintain the original wavelength specification (605nm dominant) and orange color, ensuring optical and electrical compatibility with the EFA5364X. Parts in this category include SLR-56DC3F and SLR-56DCT32 from Rohm Semiconductor. Both operate at 2V forward voltage (0.1V higher than the original) and maintain the 5mm T-1 3/4 through-hole configuration. The viewing angle of 40° differs from the original 35°, and millicandela ratings are lower (25mcd versus 1560mcd), reflecting different brightness specifications. These parts are active products with RoHS3 compliance.

Category B: Alternative Orange Wavelength Substitutes The Everlight Electronics 383-2USOC/S400-A6, 383-2USOC/S400-A7, and 383-2USOC/S400-A8 series operate at 615nm dominant wavelength with 2V forward voltage. These parts feature significantly higher millicandela ratings (10000mcd, 12500mcd, and 16000mcd respectively) and narrower viewing angles (6°). The lens color is specified as colorless with clear transparency, differing from the orange lens of the original part. All three are active products with RoHS3 compliance and MSL 1 rating.

Category C: Cross-Color Alternatives Parts SLR-56YC3F, SLR-56YCT32, HLMP-3451, and LTL-307YE represent yellow-emitting alternatives. These are included in the original substitute list but differ fundamentally in color (yellow versus orange) and wavelength (585-588nm versus 605nm). These parts are suitable only when application requirements permit color substitution.

Category D: Obsolete or Limited-Use Alternatives SLI-560DT3F from Rohm Semiconductor is marked as "Not For New Designs" and represents a legacy option with 611nm wavelength and 1.9V forward voltage matching the original, but with lower brightness (1000mcd) and reduced viewing angle (40°).

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength - Dominant (nm)	Vf (Typ) (V)	Millicandela Rating (mcd)	Viewing Angle (°)	Lens Size	Mounting Type	Height Max (mm)	Product Status
EFA5364X	Stanley Electric Co	Orange	605	1.9	1560	35	5mm, T-1 3/4	Through Hole	8.80	Obsolete
SLR-56DC3F	Rohm Semiconductor	Orange	605	2.0	25	40	5mm, T-1 3/4	Through Hole	8.90	Active
SLR-56DCT32	Rohm Semiconductor	Orange	605	2.0	25	40	5.00mm Dia	Through Hole	8.90	Active
383-2USOC/S400-A6	Everlight Electronics Co Ltd	Orange	615	2.0	10000	6	5.00mm Dia	Through Hole	8.90	Active
383-2USOC/S400-A7	Everlight Electronics Co Ltd	Orange	615	2.0	12500	6	5.00mm Dia	Through Hole	8.90	Active
383-2USOC/S400-A8	Everlight Electronics Co Ltd	Orange	615	2.0	16000	6	5.00mm Dia	Through Hole	8.90	Active
SLI-560DT3F	Rohm Semiconductor	Orange	611	1.9	1000	40	5mm, T-1 3/4	Through Hole	7.70	Not For New Designs
SLR-56YC3F	Rohm Semiconductor	Yellow	587	2.1	25	40	5mm, T-1 3/4	Through Hole	8.90	Active
SLR-56YCT32	Rohm Semiconductor	Yellow	587	2.1	25	40	5.00mm Dia	Through Hole	8.90	Active
HLMP-3451	Broadcom Limited	Yellow	585	2.0	3.6	50	5mm, T-1 3/4	Through Hole	6.35	Active
LTL-307YE	Lite-On Inc.	Yellow	588	2.1	40	40	5mm, T-1 3/4	Through Hole	8.60	Active

Engineering Selection Recommendations

For Direct Replacement (Orange 605nm Specification): SLR-56DC3F and SLR-56DCT32 from Rohm Semiconductor provide the closest electrical and optical match to the EFA5364X. Both maintain 605nm dominant wavelength, orange lens color, and 5mm T-1 3/4 through-hole configuration. The forward voltage increase from 1.9V to 2.0V is within typical circuit tolerance margins for LED indication applications. Both parts carry RoHS3 compliance and active product status, ensuring long-term availability. SLR-56DCT32 is supplied in Tape & Box packaging, while SLR-56DC3F is supplied in bulk. The reduced millicandela rating (25mcd versus 1560mcd) reflects a lower brightness specification and must be evaluated against application visibility requirements.

For High-Brightness Orange Applications: The Everlight Electronics 383-2USOC/S400 series (A6, A7, A8 variants) offers significantly higher brightness levels (10000mcd to 16000mcd) at 615nm wavelength with 2.0V forward voltage. These parts are suitable for applications requiring enhanced visibility or longer viewing distances. The narrower 6° viewing angle concentrates light output and differs substantially from the original 35° specification. All three variants are RoHS3 compliant with active product status. Selection among the three variants depends on brightness requirements: A6 for 10000mcd, A7 for 12500mcd, and A8 for 16000mcd.

For Legacy Compatibility: SLI-560DT3F maintains the original 1.9V forward voltage and 611nm wavelength close to the original 605nm specification. However, this part is marked "Not For New Designs" and represents a legacy option with reduced brightness (1000mcd) and availability constraints. Use only when forward voltage matching is critical and brightness reduction is acceptable.

For Color-Flexible Applications: Yellow alternatives (SLR-56YC3F, SLR-56YCT32, HLMP-3451, LTL-307YE) are suitable only when application requirements permit color substitution from orange to yellow. These parts offer active product status and RoHS3 compliance but differ fundamentally in wavelength (585-588nm) and optical characteristics.

Frequently Asked Questions (FAQ)

Q: Can SLR-56DC3F directly replace EFA5364X in existing PCB designs without modification? A: Yes, for through-hole mounting. Both parts use identical 5mm T-1 3/4 package geometry and radial lead configuration. The forward voltage increase from 1.9V to 2.0V is typically accommodated by standard LED series resistor calculations. Verify that the reduced brightness (25mcd versus 1560mcd) meets application visibility requirements before substitution.

Q: What is the primary difference between the Everlight 383-2USOC/S400-A6, A7, and A8 variants? A: The three variants differ only in millicandela rating: A6 provides 10000mcd, A7 provides 12500mcd, and A8 provides 16000mcd. All three share identical electrical parameters (2.0V forward voltage, 20mA test current), wavelength (615nm), viewing angle (6°), and physical dimensions. Selection depends on required brightness level for the application.

Q: Why does the Everlight 383-2USOC/S400 series have a narrower viewing angle (6°) compared to the original EFA5364X (35°)? A: The narrower viewing angle is a characteristic of the higher brightness design. The concentrated light output at 6° viewing angle produces the higher millicandela ratings (10000-16000mcd). Applications requiring wide-angle visibility should select SLR-56DC3F or SLR-56DCT32 instead, which maintain the 40° viewing angle closer to the original specification.

Q: Is the forward voltage difference between EFA5364X (1.9V) and substitute parts (2.0V) significant? A: The 0.1V difference is minor for LED indication circuits. Standard LED series resistor designs accommodate this variation through normal component tolerances. Recalculate series resistor values if the original design operated at the absolute minimum voltage margin, but typical applications require no circuit modification.

Q: Can yellow LED parts (SLR-56YC3F, HLMP-3451, LTL-307YE) substitute for the orange EFA5364X? A: Only if the application permits color change from orange to yellow. These parts differ in wavelength (585-588nm versus 605nm) and are not suitable for applications where orange color is functionally required for status indication or user interface consistency.

Q: What is the difference between SLR-56DC3F (bulk packaging) and SLR-56DCT32 (Tape & Box packaging)? A: Both parts are electrically and mechanically identical. The difference is packaging format: SLR-56DC3F is supplied in bulk quantities, while SLR-56DCT32 is supplied in tape and box format suitable for automated assembly. Select based on procurement and assembly process requirements.

Q: Why is SLI-560DT3F marked "Not For New Designs"? A: This designation indicates the part is in legacy status with limited future availability. While it maintains the original 1.9V forward voltage and 611nm wavelength, Rohm Semiconductor recommends using active alternatives for new designs. Use only when forward voltage matching is critical and availability constraints are acceptable.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All active substitute parts listed (SLR-56DC3F, SLR-56DCT32, 383-2USOC/S400-A6/A7/A8, SLR-56YC3F, SLR-56YCT32, HLMP-3451, LTL-307YE) carry RoHS3 compliance certification. SLI-560DT3F does not specify RoHS status and should be verified before use in RoHS-regulated applications.

Q: What is the MSL (Moisture Sensitivity Level) for substitute parts? A: Rohm Semiconductor parts (SLR-56 series, SLI-560DT3F) specify MSL 1 (Unlimited) or Not Applicable. Everlight Electronics 383-2USOC/S400 series specifies MSL 1 (Unlimited). Broadcom HLMP-3451 and Lite-On LTL-307YE specify MSL 1 (Unlimited). All parts are suitable for standard storage and handling conditions without special moisture control requirements.

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