SLR-342DUT32 Equivalent & Substitute Parts

Part Overview

The SLR-342DUT32 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 carries a "Not For New Designs" status, making identification of equivalent alternatives essential for ongoing production and maintenance applications. Substitute parts must maintain compatibility across electrical characteristics, mechanical form factor, and optical properties to ensure direct replacement capability.

Key Parameters

Parameter	Value
Manufacturer Part Number	SLR-342DUT32
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
Supplier Device Package	T-1
Height (Max)	5.40mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the SLR-342DUT32 is based on the following critical parameters:

Primary Equivalence Criteria:

Color: Orange (605nm dominant wavelength)
Voltage - Forward (Vf): 2V nominal
Current - Test: 10mA
Mounting Type: Through Hole
Package / Case: Radial (T-1 form factor)
Lens Transparency: Diffused
Lens Size: 3.0mm to 3.1mm diameter

Parametric Equivalent: The SLR-343DUT32 from Rohm Semiconductor meets all primary equivalence criteria with identical electrical and optical specifications. This part maintains the same 2V forward voltage, 10mA test current, 16mcd brightness, 605nm wavelength, and T-1 through-hole radial package. The only variance is a 0.2mm increase in maximum height (5.60mm vs 5.40mm), which remains within typical PCB clearance tolerances for through-hole applications.

Similar Parts: The remaining substitute parts listed (Everlight, Würth Elektronik, Bivar, and Broadcom) are classified as similar rather than direct equivalents due to deviations in one or more critical parameters. These parts maintain the through-hole radial package and diffused lens transparency but differ in color (yellow vs orange), wavelength, brightness rating, or electrical specifications. Selection of these parts requires circuit-level evaluation to confirm functional compatibility.

Parameter Comparison

Parameter	SLR-342DUT32	SLR-343DUT32	1254-10UYD/S530-A3	151031YS05900	264-7UYD/S530-A3	3YD-F	3YDL-F	HLMP-1620	HLMP-1621
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Everlight Electronics	Würth Elektronik	Everlight Electronics	Bivar Inc.	Bivar Inc.	Broadcom Limited	Broadcom Limited
Color	Orange	Orange	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow	Yellow
Wavelength - Dominant	605nm	605nm	589nm	590nm	589nm	—	—	585nm	585nm
Voltage - Forward (Vf) (Typ)	2V	2V	2V	2.1V	2V	2V	2V	5V	12V
Current - Test	10mA	10mA	20mA	20mA	20mA	20mA	2mA	10mA	13mA
Millicandela Rating	16mcd	16mcd	200mcd	30mcd	125mcd	20mcd	2mcd	2.2mcd	2.2mcd
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3.10mm Dia	3.10mm Dia	3.00mm Dia	3.00mm Dia	2.90mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Viewing Angle	40°	40°	30°	60°	60°	35°	35°	60°	60°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Supplier Device Package	T-1	T-1	3.0mm Round	3mm Round	3.0mm Round	T-1	T-1	T-1	T-1
Height (Max)	5.40mm	5.60mm	5.20mm	5.55mm	6.20mm	5.30mm	5.30mm	6.35mm	6.35mm
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

The SLR-343DUT32 is the recommended parametric equivalent for the SLR-342DUT32. Both parts are manufactured by Rohm Semiconductor and maintain identical electrical specifications (2V forward voltage, 10mA test current), optical properties (16mcd, 605nm orange wavelength, diffused lens), and mechanical form factor (T-1 through-hole radial package). The SLR-343DUT32 carries Active product status, ensuring continued availability and supply chain stability. The 0.2mm height variance (5.60mm vs 5.40mm) is within standard PCB clearance tolerances and does not impact functional compatibility. Both parts are ROHS3 compliant with MSL 1 rating.

Alternative Selection (Similar Parts):

Selection of yellow-emitting alternatives (Everlight 1254-10UYD/S530-A3, Würth Elektronik 151031YS05900, Everlight 264-7UYD/S530-A3, Bivar 3YD-F, 3YDL-F, or Broadcom HLMP-1620/HLMP-1621) requires circuit-level evaluation. These parts maintain through-hole radial packaging and diffused lens transparency but introduce deviations in color, wavelength, brightness, and electrical specifications. The Broadcom HLMP-1620 and HLMP-1621 operate at 5V and 12V respectively, requiring different circuit design considerations than the 2V SLR-342DUT32. All alternative parts carry Active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the SLR-343DUT32 be used as a direct replacement for the SLR-342DUT32?

A: Yes. The SLR-343DUT32 is a parametric equivalent with identical electrical and optical specifications. Both parts operate at 2V forward voltage, 10mA test current, and emit 16mcd orange light at 605nm wavelength. The T-1 through-hole radial package and diffused lens are identical. The only difference is a 0.2mm increase in maximum height, which remains within standard PCB clearance tolerances.

Q: Why are the yellow LED alternatives listed if they differ in color?

A: Yellow alternatives are provided for applications where color substitution is acceptable. These parts maintain the through-hole radial package and diffused lens transparency but operate at different wavelengths (585nm to 590nm) and brightness levels. Circuit-level evaluation is required to confirm functional compatibility before selection.

Q: What is the significance of the "Not For New Designs" status on the SLR-342DUT32?

A: This status indicates the part is obsolete for new product development. The SLR-343DUT32 (Active status) is the recommended replacement for ongoing production and maintenance applications.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts in this reference, including the main part and all substitutes, carry ROHS3 compliance certification. All parts also maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What are the key parameters that determine substitution compatibility?

A: Direct substitution requires matching: color/wavelength, forward voltage (Vf), test current, brightness rating (mcd), lens transparency, lens size, viewing angle, mounting type, and package form factor. Deviations in any of these parameters require circuit-level evaluation to confirm functional compatibility.

Q: Can the Broadcom HLMP-1620 replace the SLR-342DUT32?

A: No, not as a direct replacement. The HLMP-1620 operates at 5V forward voltage compared to the SLR-342DUT32's 2V specification. Additionally, it emits yellow light at 585nm rather than orange at 605nm. Circuit redesign would be required to accommodate the different electrical and optical characteristics.

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