FA5366X Orange LED 5MM Round Through-Hole Equivalent & Substitute Parts

Part Overview

The FA5366X is an orange LED indication component manufactured by Stanley Electric Co, featuring a 5mm round domed lens with through-hole radial mounting. This discrete LED operates at 1.9V forward voltage with a dominant wavelength of 605nm and delivers 2500 millicandela at 20mA test current. The component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across mounting type, lens size, and electrical operating parameters while accommodating minor variations in wavelength, brightness, and forward voltage within acceptable design tolerances.

Key Parameters

Parameter	FA5366X Value	Substitution Relevance
Lens Size	5mm, T-1 3/4	Critical - Physical fit in PCB and housing
Mounting Type	Through Hole Radial	Critical - Board assembly compatibility
Color	Orange	Critical - Visual indication function
Lens Transparency	Clear	Critical - Light transmission characteristics
Voltage - Forward (Vf) Typ	1.9V	Important - Circuit design and current limiting
Current - Test	20mA	Important - Operating point specification
Wavelength - Dominant	605nm	Important - Color perception and application
Millicandela Rating	2500mcd	Important - Brightness level for visibility
Viewing Angle	10°	Important - Directional light emission
Height (Max)	8.80mm	Important - PCB clearance and form factor
Lens Style	Round with Domed Top	Important - Optical and mechanical form

Substitute Part Grouping Explanation

Substitute parts for the FA5366X are categorized based on strict adherence to the following substitution criteria:

Primary Substitutes (Orange Color, 5mm T-1 3/4 Through-Hole): Parts 383-2USOC/S400-A6, 383-2USOC/S400-A7, and 383-2USOC/S400-A8 from Everlight Electronics maintain identical lens size (5.00mm), mounting type (through-hole radial), and color (orange). These parts operate at 2V forward voltage (0.1V higher than FA5366X) and feature wavelengths of 615nm (dominant) with varying brightness levels from 10000mcd to 16000mcd. All three are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

Secondary Substitutes (Yellow Color, 5mm T-1 3/4 Through-Hole): Parts HLMP-3416, HLMP-3490, HLMP-3850, HLMP-3850-K0002, HLMP-C315, and HLMP-C323 from Broadcom Limited, along with 5219249F from Dialight, share identical lens size (5mm, T-1 3/4) and through-hole radial mounting. These components feature yellow color indication (585nm to 589nm dominant wavelength) with forward voltages of 2.0V to 2.1V. Brightness levels range from 50mcd to 300mcd. All are active products with ROHS3 compliance.

Substitution Logic: Primary substitutes maintain color compatibility (orange) with the FA5366X, differing primarily in forward voltage (+0.1V), dominant wavelength (+10nm), and brightness (4x to 6.4x higher). Secondary substitutes provide functional through-hole LED indication but require circuit design review due to color change from orange to yellow and reduced brightness in most cases.

Parameter Comparison

Parameter	FA5366X	383-2USOC/S400-A6	383-2USOC/S400-A7	383-2USOC/S400-A8	HLMP-3416	HLMP-C323
Manufacturer	Stanley Electric	Everlight Electronics	Everlight Electronics	Everlight Electronics	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active	Active
Color	Orange	Orange	Orange	Orange	Yellow	Yellow
Lens Size	5mm, T-1 3/4	5.00mm Dia	5.00mm Dia	5.00mm Dia	5mm, T-1 3/4	5mm, T-1 3/4
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Voltage - Forward (Vf) Typ	1.9V	2V	2V	2V	2V	2.1V
Current - Test	20mA	20mA	20mA	20mA	10mA	20mA
Wavelength - Dominant	605nm	615nm	615nm	615nm	585nm	589nm
Millicandela Rating	2500mcd	10000mcd	12500mcd	16000mcd	50mcd	170mcd
Viewing Angle	10°	6°	6°	6°	35°	25°
Height (Max)	8.80mm	8.90mm	8.90mm	8.90mm	9.19mm	8.91mm
Lens Transparency	Clear	Clear	Clear	Clear	Clear	Clear
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	845 Pcs	773 Pcs	1036 Pcs	678 Pcs	5762 Pcs	18070 Pcs

Engineering Selection Recommendations

For Direct Orange LED Replacement: The Everlight Electronics 383-2USOC/S400-A6, 383-2USOC/S400-A7, and 383-2USOC/S400-A8 series provide the closest functional equivalence to the FA5366X. All three maintain orange color indication and 5mm through-hole form factor. Selection among these three should be based on brightness requirements: 383-2USOC/S400-A6 (10000mcd) for standard applications, 383-2USOC/S400-A7 (12500mcd) for moderate brightness needs, and 383-2USOC/S400-A8 (16000mcd) for high-visibility applications. Forward voltage increases by 0.1V (from 1.9V to 2V), requiring circuit current-limiting resistor adjustment. All three are active products with ROHS3 compliance and unlimited moisture sensitivity rating, suitable for new production and long-term supply continuity.

For Yellow LED Substitution: When color change from orange to yellow is acceptable, Broadcom Limited HLMP-C323 offers the closest brightness match (170mcd) with 2.1V forward voltage and 25° viewing angle. HLMP-3416 provides wider viewing angle (35°) at lower brightness (50mcd) with 2V forward voltage. HLMP-3850 and HLMP-3850-K0002 deliver higher brightness (140mcd) suitable for applications requiring enhanced visibility. All yellow alternatives are active products with ROHS3 compliance and extensive inventory availability.

Compliance Considerations: All recommended substitute parts carry ROHS3 compliance certification and REACH Unaffected status, matching or exceeding the environmental standards of the obsolete FA5366X. The Everlight orange series and Broadcom yellow series all feature unlimited moisture sensitivity rating (MSL 1), appropriate for standard through-hole assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 383-2USOC/S400-A6 directly replace the FA5366X without circuit modification?

A: The 383-2USOC/S400-A6 maintains identical lens size, mounting type, and color. However, forward voltage increases from 1.9V to 2V. If the original circuit uses a fixed current-limiting resistor, the resistor value must be recalculated to maintain the same LED current at the new forward voltage. The relationship is: R_new = (V_supply - 2V) / I_desired. If the circuit uses a constant current source, no modification is required.

Q: What is the brightness difference between FA5366X and the Everlight substitutes?

A: The FA5366X operates at 2500mcd. The Everlight 383-2USOC/S400-A6 delivers 10000mcd (4x brighter), 383-2USOC/S400-A7 delivers 12500mcd (5x brighter), and 383-2USOC/S400-A8 delivers 16000mcd (6.4x brighter). If the original application requires the exact brightness level of the FA5366X, circuit design must incorporate current reduction or PWM dimming to match the original 2500mcd output.

Q: Are the Broadcom yellow LED parts suitable replacements for orange indication?

A: Broadcom yellow LEDs (HLMP-3416, HLMP-3490, HLMP-3850, HLMP-C315, HLMP-C323) operate at 585nm to 589nm wavelength, producing yellow rather than orange indication. These parts are suitable only when the application can accommodate color change from orange to yellow. Visual perception and user interface requirements must be evaluated before substitution.

Q: What is the viewing angle difference, and does it affect substitution?

A: The FA5366X has a 10° viewing angle. The Everlight orange substitutes have 6° (narrower, more directional), while Broadcom yellow parts range from 15° to 35° (wider). Narrower viewing angles concentrate light intensity in a specific direction, while wider angles distribute light over a broader area. Application requirements for directional versus diffuse indication must be considered.

Q: Do all substitute parts have the same physical height?

A: Heights are similar but not identical. FA5366X maximum height is 8.80mm. Everlight orange parts are 8.90mm (0.1mm taller). Broadcom parts range from 8.91mm to 12.44mm depending on model. For applications with tight PCB clearance constraints, verify the specific substitute part height against available space.

Q: Which substitute offers the best long-term supply availability?

A: Broadcom HLMP-C323 shows the highest inventory (18070 pcs), followed by HLMP-3850 (25115 pcs). Among orange substitutes, Everlight 383-2USOC/S400-A7 has the highest inventory (1036 pcs). All recommended substitutes are active products with established manufacturing status, supporting long-term supply continuity compared to the obsolete FA5366X.

Q: Are there packaging differences between the main part and substitutes?

A: The FA5366X is specified with "-" packaging (not detailed). Everlight orange substitutes are available in Bulk packaging. Broadcom parts are primarily Bulk, with HLMP-3850-K0002 available in Tape & Reel format. Packaging selection depends on assembly volume and handling requirements. Bulk packaging is standard for through-hole components in moderate to high-volume production.

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