FY5365S LED Yellow Clear 5MM Round T/H Equivalent & Substitute Parts

Part Overview

The FY5365S is a yellow 590nm LED indication component manufactured by Stanley Electric Co, designed for through-hole mounting in discrete applications. This part operates at 1.9V forward voltage with a 500mcd brightness rating and features a clear lens with 45° viewing angle in a standard 5mm T-1 3/4 round domed package.

The FY5365S is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Key Parameters

Parameter	FY5365S Value	Substitution Relevance
Color	Yellow	Critical - determines optical output
Lens Transparency	Clear	Critical - affects light diffusion and visibility
Lens Size	5mm, T-1 3/4	Critical - physical fit and mounting compatibility
Mounting Type	Through Hole	Critical - PCB assembly method
Voltage - Forward (Vf) Typ	1.9V	Important - circuit design parameter
Current - Test	20mA	Important - operating current specification
Wavelength - Dominant	590nm	Important - color specification
Millicandela Rating	500mcd	Important - brightness level
Viewing Angle	45°	Important - light distribution pattern
Package / Case	Radial	Critical - lead configuration

Substitute Part Grouping Explanation

Substitute parts for the FY5365S are grouped based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

Color: Yellow (optical output requirement)
Lens Transparency: Clear (light transmission characteristic)
Lens Size: 5mm, T-1 3/4 (physical form factor)
Mounting Type: Through Hole (assembly compatibility)
Package / Case: Radial (lead configuration)

Secondary Compatibility Parameters:

Voltage - Forward (Vf): Range 1.9V to 2.1V (acceptable circuit integration variance)
Current - Test: 10mA to 20mA (operating point tolerance)
Wavelength - Dominant: 585nm to 592nm (yellow spectrum range)
Millicandela Rating: Varies by application requirement (brightness selection)
Viewing Angle: 16° to 50° (application-dependent visibility requirement)

Parts that deviate from primary criteria (such as HLMP-C423-L0002, which is orange rather than yellow, or parts with diffused lenses) are included in the comparison table for reference but do not qualify as direct substitutes for applications requiring yellow clear LEDs.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	Wavelength - Dominant	mcd Rating	Viewing Angle	Height (Max)	Product Status
FY5365S	Stanley Electric Co	Yellow	Clear	1.9V	20mA	590nm	500mcd	45°	7.80mm	Obsolete
SLI-560YT3F	Rohm Semiconductor	Yellow	Clear	1.9V	20mA	591nm	1000mcd	40°	7.70mm	Active
LTL-307YE	Lite-On Inc.	Yellow	Clear	2.1V	20mA	588nm	40mcd	40°	8.60mm	Active
SLR-56YC3F	Rohm Semiconductor	Yellow	Clear	2.1V	10mA	587nm	25mcd	40°	8.90mm	Active
SLR-56YCT32	Rohm Semiconductor	Yellow	Clear	2.1V	10mA	587nm	25mcd	40°	8.90mm	Active
Z-212Y	JKL Components Corp.	Yellow	Clear	2.1V	10mA	590nm	20mcd	16°	13.50mm	Active
HLMP-3451	Broadcom Limited	Yellow	Diffused	2V	10mA	585nm	3.6mcd	50°	6.35mm	Active
HLMP-3451-D0000	Broadcom Limited	Yellow	Diffused	2V	10mA	585nm	3.6mcd	50°	6.35mm	Active
HLMP-C423-L0002	Broadcom Limited	Orange	Clear	1.9V	20mA	605nm	170mcd	25°	8.91mm	Active
SLR-56DC3F	Rohm Semiconductor	Orange	Clear	2V	10mA	605nm	25mcd	40°	8.90mm	Active
SLR-56DCT32	Rohm Semiconductor	Orange	Clear	2V	10mA	605nm	25mcd	40°	8.90mm	Active

Engineering Selection Recommendations

Direct Substitutes (Yellow Clear LEDs - Active Status):

The following parts meet all primary substitution criteria and are currently in active production status:

SLI-560YT3F (Rohm Semiconductor) - Highest compatibility for brightness-critical applications. Matches FY5365S in forward voltage (1.9V), test current (20mA), and wavelength (591nm). Provides higher brightness (1000mcd vs 500mcd). Compliant with ROHS3 and REACH requirements. Recommended for direct replacement in applications where increased brightness is acceptable.

LTL-307YE (Lite-On Inc.) - Suitable for applications tolerating slight voltage increase (2.1V vs 1.9V). Maintains 20mA test current and clear lens transparency. Wavelength 588nm remains within yellow spectrum. Lower brightness (40mcd) requires circuit evaluation for visibility requirements. ROHS3 and REACH compliant.

SLR-56YC3F and SLR-56YCT32 (Rohm Semiconductor) - Functionally equivalent pair differing only in packaging (Bulk vs Tape & Box). Both operate at 2.1V with 10mA test current. Wavelength 587nm and 25mcd brightness represent significant reduction from FY5365S specifications. Suitable only for applications with lower brightness requirements. ROHS3 and REACH compliant.

Z-212Y (JKL Components Corp.) - Yellow clear LED with 2.1V forward voltage and 10mA test current. Wavelength 590nm matches FY5365S dominant wavelength. Significantly reduced brightness (20mcd) and narrow viewing angle (16°) limit applicability. Height 13.50mm exceeds FY5365S by 5.7mm, requiring PCB layout verification. ROHS3 and REACH compliant.

Non-Direct Substitutes (Reference Only):

HLMP-3451 and HLMP-3451-D0000 feature diffused lenses rather than clear, resulting in different light transmission characteristics unsuitable for applications requiring clear lens performance. HLMP-C423-L0002, SLR-56DC3F, and SLR-56DCT32 are orange LEDs (605nm wavelength) and do not qualify as substitutes for yellow indication requirements.

Compliance Status:

All active substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. The obsolete FY5365S status necessitates transition to active alternatives for new designs and ongoing supply requirements.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3451 replace FY5365S in my application?

A: HLMP-3451 is a yellow LED but features a diffused lens rather than clear. This fundamentally changes light transmission and diffusion characteristics. If your application requires a clear lens for focused light output, HLMP-3451 is not suitable. If diffused light is acceptable, electrical parameters (2V forward voltage, 10mA test current, 3.6mcd brightness) differ significantly from FY5365S and require circuit re-evaluation.

Q: What is the difference between SLR-56YC3F and SLR-56YCT32?

A: These parts are electrically and optically identical. The difference is packaging: SLR-56YC3F is supplied in Bulk packaging, while SLR-56YCT32 is supplied in Tape & Box (TB) format. Both are Rohm Semiconductor SLR-56 series components with identical electrical specifications. Selection depends on procurement and assembly requirements.

Q: Why does SLI-560YT3F have higher brightness (1000mcd) than FY5365S (500mcd)?

A: SLI-560YT3F is a different LED design from Rohm Semiconductor with higher luminous intensity. While this provides greater brightness, it may require circuit current-limiting adjustment if the original design was optimized for 500mcd output. Verify that increased brightness does not cause unintended visual effects or exceed application requirements.

Q: Can I use Z-212Y as a direct replacement?

A: Z-212Y matches FY5365S in color (yellow) and lens transparency (clear), but differs significantly in three parameters: forward voltage (2.1V vs 1.9V), test current (10mA vs 20mA), and physical height (13.50mm vs 7.80mm). The 5.7mm height increase may conflict with PCB layout constraints. Circuit redesign is required to accommodate the lower operating current. Use only if layout and circuit modifications are feasible.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed carry ROHS3 compliance certification. The obsolete FY5365S does not have RoHS status specified. If RoHS compliance is a requirement for your application, all listed active alternatives meet this standard.

Q: What viewing angle should I select?

A: FY5365S provides 45° viewing angle. Substitute parts range from 16° (Z-212Y, narrow beam) to 50° (HLMP-3451, wide beam). Select based on application visibility requirements: narrow angles (16-25°) for focused indication, medium angles (40-45°) for general indication, and wide angles (50°) for broad visibility. Verify that selected viewing angle matches intended installation geometry.

Q: Can I substitute an orange LED for yellow?

A: No. Orange LEDs (605nm wavelength) and yellow LEDs (585-592nm wavelength) produce distinctly different colors. Optical indication systems rely on color differentiation for status communication. Orange and yellow are not interchangeable without changing the functional meaning of the indication.

Q: What is the significance of wavelength specifications?

A: Dominant wavelength (590nm for FY5365S) defines the perceived color. Peak wavelength indicates the spectral peak of emission. For yellow indication, acceptable range is approximately 585-592nm. Substitute parts within this range maintain visual color consistency. Parts outside this range (such as orange at 605nm) produce different colors unsuitable for yellow indication applications.

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