EFR3863X Equivalent & Substitute Parts Reference

Part Overview

The EFR3863X is a 3mm red LED indicator manufactured by Stanley Electric Co, designed for through-hole mounting applications. This component features a clear lens with 1280mcd brightness at 1.9V forward voltage and 626nm dominant wavelength. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain compatibility with existing circuit designs while meeting current availability and compliance requirements.

Substiute Parts

EFR3863X

Stanley Electric CoIn Stock: 816EFR3863X Datasheet

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204-10SURC/S400-A7

Everlight Electronics Co LtdIn Stock: 922204-10SURC/S400-A7 Datasheet

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HLMP-EG30-NR000

Broadcom LimitedIn Stock: 15813HLMP-EG30-NR000 Datasheet

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SLI-343UR3F

Rohm SemiconductorIn Stock: 9949SLI-343UR3F Datasheet

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SLI-343URC3F

Rohm SemiconductorIn Stock: 7141SLI-343URC3F Datasheet

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SLI-343URCT32

Rohm SemiconductorIn Stock: 968SLI-343URCT32 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EFR3863X is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Red
• Mounting Type: Through Hole Radial
• Voltage - Forward (Vf): 1.9V nominal operation
• Current - Test: 20mA
• Wavelength - Dominant: 626nm ±10nm range
• Lens Size: 3mm or 5mm T-1 series

Secondary Compatibility Criteria:

• Millicandela Rating: 1000mcd minimum
• Viewing Angle: 20° to 40°
• Package / Case: Radial configuration
• Lens Transparency: Clear or Diffused acceptable

Substitute parts are grouped into two categories based on lens size compatibility:

Category A - Direct 3mm Replacement: Parts maintaining 3mm lens diameter with matching electrical characteristics.

Category B - Form Factor Variant (5mm): Parts with 5mm lens diameter but identical electrical performance, suitable where PCB layout permits larger component footprint.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - HLMP-EG30-NR000 (Broadcom Limited)

This part provides the closest electrical and optical match to the EFR3863X. It maintains identical forward voltage (1.9V), dominant wavelength (626nm), and millicandela rating (1290mcd). The component is classified as Active product status with ROHS3 compliance. The 5mm lens size represents a form factor increase; PCB layout verification is required to confirm mechanical compatibility. Inventory availability is substantial (15,732 units).

Secondary Substitute - SLI-343URCT32 (Rohm Semiconductor)

This part operates at matching 1.9V forward voltage with clear lens transparency identical to the main part. Product status is Active with ROHS3 compliance. The 3mm lens size maintains the original form factor. Millicandela rating of 450mcd is lower than the original specification; this part is suitable for applications where reduced brightness is acceptable. Inventory is limited (870 units).

Alternative Substitute - 204-10SURC/S400-A7 (Everlight Electronics)

This 3mm red LED operates at 2V forward voltage with 1000mcd brightness. The 0.1V voltage differential requires circuit verification to confirm compatibility with existing current-limiting resistor designs. ROHS3 compliance is confirmed. Inventory availability is good (863 units).

Not Recommended for New Designs - SLI-343UR3F and SLI-343URC3F

Both Rohm parts carry "Not For New Designs" status. While electrically compatible at 1.9V, the diffused lens transparency and reduced brightness (350mcd and 450mcd respectively) represent functional deviations. These parts are suitable only for legacy system maintenance where original specifications are not critical.

Frequently Asked Questions (FAQ)

Q: Can the HLMP-EG30-NR000 replace the EFR3863X directly on the PCB?

A: Electrical compatibility is confirmed (1.9V, 20mA, 626nm wavelength, 1290mcd). The HLMP-EG30-NR000 uses a 5mm T-1 3/4 lens versus the original 3mm T-1 size. Physical clearance verification is required. The component height increases from 5.90mm to 8.91mm maximum.

Q: What is the impact of the 0.1V voltage difference in the 204-10SURC/S400-A7?

A: The 204-10SURC/S400-A7 operates at 2V versus the original 1.9V. In series resistor-limited circuits, this 0.1V increase reduces LED current by approximately 5% at constant supply voltage. Verify that the existing current-limiting resistor maintains acceptable brightness levels. For precision applications, resistor adjustment may be necessary.

Q: Why are the SLI-343 series parts marked "Not For New Designs"?

A: Rohm Semiconductor has designated these parts as legacy components. While functionally operational, they are not recommended for new product development. These parts are suitable for maintenance and repair of existing systems using the original EFR3863X.

Q: What is the difference between clear and diffused lens transparency?

A: Clear lens transparency provides focused light output with narrow viewing angle (20-30°). Diffused lens transparency scatters light across a wider viewing angle (40°) with reduced peak brightness. The EFR3863X uses clear transparency; SLI-343UR3F and SLI-343URC3F use diffused. Substitution requires verification that the application tolerates the wider viewing angle and lower peak intensity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active and legacy substitute parts listed carry ROHS3 compliance certification. The original EFR3863X compliance status is not specified in available documentation.

Q: Which substitute offers the best inventory availability?

A: The HLMP-EG30-NR000 provides the highest inventory level at 15,732 units in stock. This part also maintains the closest electrical and optical specifications to the original EFR3863X.

Q: Can I use the SLI-343URCT32 as a direct replacement?

A: Yes, for applications where reduced brightness is acceptable. The SLI-343URCT32 maintains 3mm form factor, 1.9V operation, and clear lens transparency. The 450mcd brightness is 65% lower than the original 1280mcd specification. Verify that the application does not require the original brightness level.