SLR-332YC3F Equivalent & Substitute Parts

Part Overview

The SLR-332YC3F is a yellow LED indicator manufactured by Rohm Semiconductor, designed for through-hole applications in T-1 package format. This component operates at 2.1V forward voltage with a 10mA test current and delivers 10 millicandela brightness at 587nm wavelength. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the primary component faces supply constraints, extended lead times, or when design flexibility permits selection from qualified alternatives that meet equivalent electrical and mechanical specifications.

Key Parameters

Parameter	SLR-332YC3F
Manufacturer	Rohm Semiconductor
Color	Yellow
Lens Transparency	Clear
Voltage - Forward (Vf) Typical	2.1V
Current - Test	10mA
Millicandela Rating	10mcd
Wavelength - Dominant	587nm
Lens Size	3.20mm Dia
Mounting Type	Through Hole
Package / Case	Radial T-1
Height (Max)	4.60mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following parameters:

Primary Substitution Criteria:

Color: Yellow
Lens Transparency: Clear
Mounting Type: Through Hole
Package / Case: Radial T-1
Voltage - Forward (Vf): 2.0V to 2.1V
Wavelength - Dominant: 585nm to 590nm (yellow spectrum)
RoHS Status: ROHS3 Compliant
Product Status: Active

Secondary Compatibility Factors:

Lens Size: 3.0mm to 3.2mm diameter
Height (Max): 4.60mm to 6.35mm
Current - Test: 10mA to 20mA

Parts meeting all primary criteria are classified as direct substitutes. Parts with identical electrical characteristics but different brightness ratings (millicandela) remain functionally compatible within the yellow LED indication category.

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Lens Size	Height (Max)	Viewing Angle	RoHS Status	Product Status
SLR-332YC3F	Rohm Semiconductor	Yellow	2.1V	10mA	10mcd	587nm	3.20mm	4.60mm	85°	ROHS3	Active
HLMP-1420	Broadcom Limited	Yellow	2.0V	10mA	15mcd	585nm	3.0mm	6.35mm	45°	ROHS3	Active
HLMP-1421	Broadcom Limited	Yellow	2.0V	10mA	15mcd	585nm	3.0mm	6.35mm	45°	ROHS3	Active
LTL-4252N	Lite-On Inc.	Yellow	2.1V	10mA	19mcd	588nm	3.0mm	5.85mm	45°	ROHS3	Active
SSL-LX3044YT	Lumex Opto/Components Inc.	Yellow	2.1V	20mA	90mcd	—	3.0mm	4.60mm	30°	ROHS3	Active
WP710A10YT	Kingbright	Yellow	2.1V	20mA	30mcd	588nm	3.0mm	5.90mm	34°	ROHS3	Active

Engineering Selection Recommendations

Direct Substitutes (Yellow LED, Clear Lens, T-1 Package):

HLMP-1420 and HLMP-1421 are functionally equivalent substitutes. Both operate at 2.0V forward voltage with 10mA test current, matching the primary electrical requirements. These Broadcom components deliver 15 millicandela brightness and maintain ROHS3 compliance and active product status. The 45° viewing angle differs from the SLR-332YC3F's 85° specification; circuit design must accommodate this narrower beam pattern.

LTL-4252N from Lite-On Inc. provides electrical equivalence at 2.1V forward voltage and 10mA test current with 588nm wavelength alignment. This part delivers 19 millicandela brightness and maintains ROHS3 compliance. REACH status differs (Affected vs. Unaffected); regulatory requirements must be verified for the application region.

WP710A10YT from Kingbright operates at 2.1V forward voltage with matching wavelength characteristics (588nm). This part requires 20mA test current and delivers 30 millicandela brightness. The increased current demand and brightness rating necessitate circuit verification before implementation.

SSL-LX3044YT from Lumex Opto/Components Inc. matches 2.1V forward voltage and physical dimensions (4.60mm height). This part operates at 20mA test current and delivers 90 millicandela brightness with a 30° viewing angle. The significantly higher brightness and narrower viewing angle require application-specific validation.

All substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory alignment and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1420 or HLMP-1421 replace SLR-332YC3F directly in the circuit?

A: Both parts meet the primary electrical criteria (2.0V forward voltage, 10mA test current, yellow color, clear lens, T-1 package). The 45° viewing angle is narrower than the SLR-332YC3F's 85° specification. Circuit board layout and application requirements must confirm that the reduced viewing angle does not impact system performance.

Q: What is the difference between LTL-4252N and WP710A10YT?

A: Both are yellow T-1 LEDs with 2.1V forward voltage. LTL-4252N operates at 10mA test current with 19 millicandela brightness, while WP710A10YT requires 20mA test current and delivers 30 millicandela brightness. The higher current demand in WP710A10YT necessitates circuit current-limiting verification. LTL-4252N has REACH Affected status; WP710A10YT has REACH Unaffected status.

Q: Why does SSL-LX3044YT have such high brightness compared to the main part?

A: SSL-LX3044YT delivers 90 millicandela at 20mA test current, significantly exceeding the SLR-332YC3F's 10 millicandela at 10mA. This higher brightness is a characteristic of the Lumex design. Applications requiring lower brightness must implement additional current limiting or use a different substitute part.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 Compliant status, ensuring regulatory alignment with the original SLR-332YC3F component.

Q: What is the impact of different viewing angles on substitution?

A: Viewing angle determines the beam spread of the LED indicator. The SLR-332YC3F provides 85° viewing angle (wide beam). HLMP-1420, HLMP-1421, and LTL-4252N provide 45° viewing angle (medium beam). WP710A10YT provides 34° viewing angle (narrow beam). SSL-LX3044YT provides 30° viewing angle (narrow beam). Circuit board placement and visibility requirements must be evaluated against the substitute part's beam characteristics.

Q: Can I use an orange LED substitute if yellow is unavailable?

A: No. Orange LEDs (HLMP-Y402-G0000, WP132XNT, WP710A10NT) operate at different wavelengths (602nm to 605nm) and are not functionally equivalent to yellow LEDs (585nm to 590nm). Color-specific applications require yellow spectrum components.

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