SLR-342DU3F Equivalent & Substitute Parts

Part Overview

The SLR-342DU3F is an orange diffused T-1 through-hole LED manufactured by Rohm Semiconductor, designed for discrete indication applications. This part operates at 2V forward voltage with a 16mcd brightness rating and 605nm dominant wavelength. The product is classified as Not For New Designs, making identification of equivalent and substitute parts essential for ongoing maintenance, repair, and legacy system support.

Key Parameters

Parameter	SLR-342DU3F
Manufacturer	Rohm Semiconductor
Color	Orange
Wavelength - Dominant	605nm
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	16mcd
Lens Transparency	Diffused
Lens Size	3.10mm Dia
Viewing Angle	40°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.40mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-342DU3F is determined by the following critical parameters: color (orange), wavelength range (605nm dominant), forward voltage (2V), mounting type (through hole radial), and lens transparency (diffused). Parts are grouped into two categories:

Parametric Equivalent: Parts sharing identical electrical characteristics, mechanical dimensions, and optical properties with the main part. These provide direct functional replacement without circuit modification.

Similar Parts: Parts with compatible but not identical specifications. These may differ in brightness (millicandela rating), lens size, viewing angle, or wavelength within acceptable ranges for indication applications. Similar parts require engineering evaluation for specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (Typ)	Test Current	Brightness (mcd)	Lens Size	Viewing Angle	Height (Max)	Product Status
SLR-342DU3F	Rohm Semiconductor	Orange	605	2V	10mA	16	3.10mm	40°	5.40mm	Not For New Designs
SLR-343DU3F	Rohm Semiconductor	Orange	605	2V	10mA	16	3.10mm	40°	5.40mm	Active
3294-15USOC/S530-A3	Everlight Electronics Co Ltd	Orange	615	2V	20mA	80	3.00mm	80°	4.45mm	Active
1254-10UYD/S530-A3	Everlight Electronics Co Ltd	Yellow	589	2V	20mA	200	3.00mm	30°	5.20mm	Active
151031YS05900	Würth Elektronik	Yellow	590	2.1V	20mA	30	3.00mm	60°	5.55mm	Active
264-7UYD/S530-A3	Everlight Electronics Co Ltd	Yellow	589	2V	20mA	125	2.90mm	60°	6.20mm	Active
3YD-F	Bivar Inc.	Yellow	590	2V	20mA	20	3mm, T-1	35°	5.30mm	Active
3YDL-F	Bivar Inc.	Yellow	590	2V	2mA	2	3mm, T-1	35°	5.30mm	Active
HLMP-1620	Broadcom Limited	Yellow	585	5V	10mA	2.2	3mm, T-1	60°	6.35mm	Active
HLMP-1620-C00A1	Broadcom Limited	Yellow	583	5V	10mA	2.2	3mm, T-1	60°	Not specified	Active
HLMP-1620-C00A2	Broadcom Limited	Yellow	583	5V	10mA	2.2	3mm, T-1	60°	Not specified	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): The SLR-343DU3F from Rohm Semiconductor is the primary equivalent for the SLR-342DU3F. Both parts share identical electrical specifications (2V forward voltage, 10mA test current), optical properties (605nm wavelength, 16mcd brightness, diffused lens), and mechanical dimensions (3.10mm lens diameter, 5.40mm maximum height). The SLR-343DU3F is classified as Active, providing long-term availability and supply continuity for legacy system support.

Similar Parts (Application-Dependent Selection): The 3294-15USOC/S530-A3 from Everlight Electronics maintains orange color and 2V forward voltage compatibility but operates at higher test current (20mA) and offers increased brightness (80mcd). This part is suitable for applications requiring enhanced visibility.

Yellow-emitting alternatives (1254-10UYD/S530-A3, 151031YS05900, 264-7UYD/S530-A3, 3YD-F, 3YDL-F) are available from multiple manufacturers. These parts maintain 2V forward voltage operation and through-hole mounting but differ in wavelength (589-590nm), brightness, and test current specifications. Selection depends on application tolerance for color shift and brightness variation.

The Broadcom HLMP-1620 series operates at 5V forward voltage and is not recommended as a direct substitute without circuit redesign. This part requires modified power supply configuration and is suitable only for applications with 5V supply availability.

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the SLR-343DU3F directly replace the SLR-342DU3F without circuit modification? A: Yes. The SLR-343DU3F is a parametric equivalent with identical forward voltage (2V), test current (10mA), wavelength (605nm), and mechanical dimensions. No circuit changes are required.

Q: Why are yellow-emitting LEDs listed as similar parts? A: Yellow LEDs (589-590nm wavelength) differ from the orange SLR-342DU3F (605nm). While they maintain compatible 2V forward voltage and through-hole mounting, the color shift may not be acceptable for applications requiring specific indication colors. Engineering evaluation is required for each application.

Q: Can I use the Broadcom HLMP-1620 as a substitute? A: The HLMP-1620 operates at 5V forward voltage, requiring circuit redesign. It is not a direct substitute for the 2V SLR-342DU3F. Use only if your application circuit supports 5V LED operation.

Q: What is the difference between the 3294-15USOC/S530-A3 and the SLR-342DU3F? A: The 3294-15USOC/S530-A3 maintains orange color and 2V forward voltage but has higher test current (20mA vs 10mA), increased brightness (80mcd vs 16mcd), and wider viewing angle (80° vs 40°). It is suitable for applications requiring higher visibility.

Q: Are all listed parts ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.

Q: What parameters must match for a part to be considered a direct equivalent? A: Direct equivalents must match forward voltage (2V), test current (10mA), dominant wavelength (605nm), lens transparency (diffused), lens size (3.10mm), and mounting type (through hole radial). The SLR-343DU3F meets all these criteria.

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