EFA3863X Equivalent & Substitute Parts Reference

Part Overview

The EFA3863X is an orange LED indicator manufactured by Stanley Electric Co, designed for through-hole mounting applications. This component features a 3mm round lens with domed top, 605nm dominant wavelength, and 1600mcd brightness rating at 20mA test current. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across electrical characteristics, mechanical form factor, and optical performance parameters.

Key Parameters

Parameter	EFA3863X Value	Substitution Criticality
Color	Orange	Critical
Wavelength - Dominant	605nm	Critical
Lens Size	3mm, T-1	Critical
Voltage - Forward (Vf) Typical	1.9V	High
Current - Test	20mA	High
Mounting Type	Through Hole	Critical
Lens Transparency	Clear	High
Millicandela Rating	1600mcd	Medium
Viewing Angle	20°	Medium
Height (Max)	5.90mm	High

Substitute Part Grouping Explanation

Substitution logic for the EFA3863X is based on the following critical parameters:

Primary Compatibility Criteria:

Color: Orange (605nm wavelength range)
Lens Size: 3mm T-1 form factor
Mounting Type: Through Hole radial configuration
Voltage - Forward (Vf): 1.9V nominal operation
Lens Transparency: Clear optical transmission

Secondary Compatibility Criteria:

Current - Test: 20mA standard test condition
Height (Max): Mechanical clearance within 5.90mm envelope
Viewing Angle: Directional characteristics for application fit
Millicandela Rating: Brightness performance relative to circuit design

Substitute parts are grouped into two categories:

Category A - Direct 3mm T-1 Orange Clear Substitutes: Parts maintaining identical lens size, color, wavelength, and transparency. These include SLI-343DC3F and SLI-343D8C3F from Rohm Semiconductor, which preserve the 3mm form factor and orange clear lens specification.

Category B - Larger Format Orange Clear Substitutes: Parts with expanded lens size (5mm T-1 3/4) but matching wavelength and transparency characteristics. These include HLMP-EJ30-NR0DD from Broadcom Limited and SLI-570DT3F from Rohm Semiconductor, suitable for applications where increased brightness and larger form factor are acceptable.

Category C - Alternative Brightness/Angle Configurations: Parts maintaining 3mm T-1 form factor and orange color but with modified optical characteristics. WP710A10SEC/J4 from Kingbright offers significantly higher brightness (10000mcd) with adjusted viewing angle (34°).

Parameter Comparison

Parameter	EFA3863X	SLI-343DC3F	SLI-343D8C3F	HLMP-EJ30-NR0DD	SLI-570DT3F	WP710A10SEC/J4
Manufacturer	Stanley Electric	Rohm Semiconductor	Rohm Semiconductor	Broadcom Limited	Rohm Semiconductor	Kingbright
Color	Orange	Orange	Orange	Orange	Orange	Orange
Wavelength - Dominant (nm)	605	605	605	605	611	605
Lens Size	3mm, T-1	3.10mm Dia	3.10mm Dia	5mm, T-1 3/4	5mm, T-1 3/4	3mm, T-1
Lens Transparency	Clear	Clear	Clear	Clear	Clear	Clear
Vf Typical (V)	1.9	1.9	2.2	1.98	1.9	2.2
Current - Test (mA)	20	20	20	20	20	20
Millicandela Rating (mcd)	1600	500	680	1290	3000	10000
Viewing Angle (°)	20	40	40	30	20	34
Height (Max) (mm)	5.90	5.60	5.60	8.91	8.85	5.90
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Not For New Designs	Active	Active	Active	Active
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS Unaffected	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Form Factor Replacement (3mm T-1):

SLI-343D8C3F from Rohm Semiconductor is the primary recommendation for new designs. This part maintains the 3mm T-1 lens size, orange color, 605nm wavelength, and clear transparency of the EFA3863X. Product status is Active, ensuring long-term availability. RoHS3 compliance satisfies current regulatory requirements. Forward voltage of 2.2V represents a 0.3V increase from the original specification; circuit design must accommodate this parameter shift. Millicandela rating of 680mcd is lower than the original 1600mcd; applications requiring equivalent brightness must evaluate circuit modifications or alternative selections.

SLI-343DC3F from Rohm Semiconductor provides an alternative with matching 1.9V forward voltage and identical 3mm T-1 form factor. Product status is Not For New Designs, limiting suitability for new development. This part is appropriate for legacy system maintenance where existing inventory or design constraints require 1.9V operation. Millicandela rating of 500mcd is significantly reduced compared to the original specification.

For Increased Brightness with Larger Form Factor:

SLI-570DT3F from Rohm Semiconductor offers 3000mcd brightness at 1.9V forward voltage with 20° viewing angle matching the original specification. Lens size increases to 5mm T-1 3/4 with height of 8.85mm; mechanical clearance verification is required. Product status is Active with RoHS3 compliance. Wavelength shifts to 611nm (within orange spectrum). This selection is appropriate for applications where increased brightness justifies larger physical envelope.

HLMP-EJ30-NR0DD from Broadcom Limited provides 1290mcd brightness at 1.98V forward voltage. Lens size is 5mm T-1 3/4 with height of 8.91mm. Product status is Active. This part represents a moderate brightness increase with larger form factor and is suitable for applications requiring improved visibility without extreme brightness levels.

For Maximum Brightness Requirement:

WP710A10SEC/J4 from Kingbright maintains the 3mm T-1 form factor and 5.90mm height of the original part. Brightness rating of 10000mcd represents a 6.25x increase over the EFA3863X. Forward voltage is 2.2V; circuit design modification is required. Viewing angle of 34° is wider than the original 20°. Product status is Active with RoHS3 compliance. This selection is appropriate for applications where maximum brightness within the original mechanical envelope is critical.

Frequently Asked Questions (FAQ)

Q: Can SLI-343DC3F be used as a direct replacement for EFA3863X?

A: SLI-343DC3F maintains identical lens size (3mm T-1), color (orange), wavelength (605nm), and forward voltage (1.9V) as the EFA3863X. However, millicandela rating is reduced from 1600mcd to 500mcd. Product status is Not For New Designs. This part is suitable for legacy system maintenance where 1.9V operation and 3mm form factor are required, but brightness performance is significantly reduced. New designs should select SLI-343D8C3F or alternative active-status parts.

Q: What is the primary difference between 3mm T-1 and 5mm T-1 3/4 form factors?

A: The 3mm T-1 designation refers to a lens diameter of 3mm with standard domed top profile and maximum height of approximately 5.90mm. The 5mm T-1 3/4 designation indicates a larger 5mm lens diameter with maximum height of approximately 8.85-8.91mm. Substitution from 3mm to 5mm requires verification of mechanical clearance in the PCB layout and component mounting area. Viewing angle characteristics also differ between these form factors.

Q: Why does SLI-343D8C3F have a higher forward voltage (2.2V) than the original EFA3863X (1.9V)?

A: Forward voltage variation is a normal characteristic of LED manufacturing and design. The 0.3V increase from 1.9V to 2.2V reflects differences in semiconductor material composition and junction design between Stanley Electric and Rohm Semiconductor manufacturing processes. Circuit design must accommodate this parameter shift through resistor value adjustment or voltage supply modification to maintain proper 20mA test current operation.

Q: Is WP710A10SEC/J4 suitable for applications requiring the original 20° viewing angle?

A: WP710A10SEC/J4 has a viewing angle of 34°, which is wider than the original EFA3863X specification of 20°. This wider angle may not be suitable for applications requiring narrow directional indication. If 20° viewing angle is critical to application function, select SLI-570DT3F (20° angle) or maintain the original EFA3863X if available from inventory.

Q: What compliance certifications should be verified for substitute parts?

A: All recommended substitute parts carry RoHS3 compliance certification, satisfying current regulatory requirements for hazardous substance restrictions. REACH status is Unaffected for all parts, indicating no specific REACH substance of concern restrictions. ECCN classification is EAR99 for all parts, consistent with export control requirements. Verify compliance requirements specific to your application jurisdiction and customer specifications before final part selection.

Q: Can SLI-570DT3F be used in applications where the original 3mm form factor is required?

A: SLI-570DT3F has a 5mm T-1 3/4 lens size with maximum height of 8.85mm, compared to the original 3mm T-1 with 5.90mm height. The larger form factor may not fit within mechanical constraints designed for 3mm components. Substitution requires verification of PCB layout clearance, component spacing, and mounting area dimensions. If 3mm form factor is mandatory, select SLI-343D8C3F or WP710A10SEC/J4 instead.

Q: What is the significance of "Not For New Designs" product status?

A: Parts designated as Not For New Designs indicate that the manufacturer is not recommending these components for new product development. While these parts may remain available from existing inventory, long-term supply cannot be guaranteed. New designs should prioritize parts with Active product status, such as SLI-343D8C3F, SLI-570DT3F, HLMP-EJ30-NR0DD, or WP710A10SEC/J4, to ensure sustained availability and manufacturing support throughout the product lifecycle.

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