SLR-342MGT32 Equivalent & Substitute Parts

Part Overview

The SLR-342MGT32 is a green diffused T-1 through-hole LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 572nm and forward voltage of 2.1V at 10mA test current. This part is classified as "Not For New Designs," making identification of active equivalent and substitute components essential for ongoing production support, maintenance, and design updates. The part remains in inventory with 3823 units available as new original stock.

Key Parameters

Parameter	Value
Manufacturer Part Number	SLR-342MGT32
Manufacturer	Rohm Semiconductor
Color	Green
Lens Transparency	Diffused
Millicandela Rating	16mcd
Voltage - Forward (Vf) Typical	2.1V
Current - Test	10mA
Viewing Angle	40°
Mounting Type	Through Hole
Wavelength - Dominant	572nm
Lens Size	3.10mm Dia
Height (Max)	5.40mm
Package / Case	Radial
Supplier Device Package	T-1
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution eligibility for the SLR-342MGT32 is determined by the following critical parameters:

Primary Substitution Criteria:

Color: Green
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial (T-1 form factor)
Voltage - Forward (Vf): 2.1V nominal
Current - Test: 10mA nominal

Secondary Compatibility Parameters:

Millicandela Rating: 16mcd (acceptable range: 4mcd to 50mcd for indication applications)
Viewing Angle: 40° (acceptable range: 35° to 60°)
Wavelength - Dominant: 572nm (acceptable range: 560nm to 575nm for green indication)
Lens Size: 3.10mm Dia (acceptable range: 2.90mm to 3.10mm)
Height (Max): 5.40mm (acceptable range: 4.50mm to 6.35mm)

Parts are classified as parametric equivalents when all primary criteria match exactly. Parts are classified as similar substitutes when primary criteria match but secondary parameters vary within acceptable ranges for indication applications.

Parameter Comparison

Parameter	SLR-342MGT32	SLR-343MGT32	151031VS06000	264-7SYGD/S530-E2	3GD-F	3GD-S	3GDL-F	HLMP-1503-D00FG
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Würth Elektronik	Everlight Electronics	Bivar Inc.	Bivar Inc.	Bivar Inc.	Broadcom Limited
Color	Green	Green	Green	Yellow-Green	Green	Green	Green	Green
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Millicandela Rating	16mcd	16mcd	30mcd	50mcd	25mcd	25mcd	4mcd	4.2mcd
Voltage - Forward (Vf) Typical	2.1V	2.1V	2.2V	2V	2.1V	2.1V	2.1V	2.1V
Current - Test	10mA	10mA	20mA	20mA	20mA	20mA	2mA	10mA
Viewing Angle	40°	40°	60°	60°	35°	40°	35°	60°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Wavelength - Dominant	572nm	—	568nm	573nm	—	—	—	569nm
Wavelength - Peak	—	563nm	560nm	575nm	568nm	568nm	568nm	565nm
Lens Size	3.10mm Dia	3.10mm Dia	3.00mm Dia	2.90mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Height (Max)	5.40mm	5.60mm	5.55mm	6.20mm	5.30mm	4.50mm	5.30mm	6.35mm
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Supplier Device Package	T-1	T-1	3mm Round	—	T-1	T-1	T-1	T-1
Product Status	Not For New Designs	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

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute):

SLR-343MGT32 from Rohm Semiconductor is the parametric equivalent to SLR-342MGT32. Both parts share identical primary specifications: green diffused T-1 through-hole configuration, 2.1V forward voltage, 10mA test current, 16mcd brightness, and 40° viewing angle. The SLR-343MGT32 is classified as Active product status, making it suitable for new designs and ongoing production. Peak wavelength specification (563nm) differs from the dominant wavelength specification (572nm) of the original part, but both fall within the acceptable green indication range. Height specification increases marginally from 5.40mm to 5.60mm, remaining within acceptable mechanical tolerances for standard through-hole PCB applications.

Similar Substitutes (Secondary Options):

3GD-S from Bivar Inc. provides close compatibility with matching green color, diffused lens, 2.1V forward voltage, 10mA test current capability at 20mA rating, and identical T-1 through-hole package. Millicandela rating of 25mcd exceeds the original 16mcd specification, suitable for applications requiring increased brightness. Viewing angle of 40° matches exactly. Height of 4.50mm is within acceptable range. Product status is Active.

3GD-F from Bivar Inc. matches primary electrical specifications with 2.1V forward voltage and T-1 through-hole package. Millicandela rating of 25mcd and 20mA test current provide increased brightness capability. Viewing angle of 35° is slightly narrower than the original 40°. Height of 5.30mm is within acceptable range. Product status is Active.

3GDL-F from Bivar Inc. provides the lowest brightness option at 4mcd with 2mA test current, suitable for applications requiring reduced power consumption. Forward voltage of 2.1V and T-1 through-hole package match the original. Viewing angle of 35° and height of 5.30mm remain within acceptable ranges. Product status is Active.

HLMP-1503-D00FG from Broadcom Limited offers compatibility with 2.1V forward voltage, 10mA test current, and T-1 through-hole package. Millicandela rating of 4.2mcd and 60° viewing angle provide wider visibility. Dominant wavelength of 569nm and peak wavelength of 565nm fall within acceptable green range. Height of 6.35mm is at the upper limit of acceptable mechanical tolerance. Product status is Active.

151031VS06000 from Würth Elektronik provides green diffused through-hole LED with 2.2V forward voltage (0.1V higher than original), 20mA test current, and 30mcd brightness. Viewing angle of 60° exceeds original specification. Lens size of 3.00mm and height of 5.55mm remain within acceptable ranges. Product status is Active.

264-7SYGD/S530-E2 from Everlight Electronics is classified as yellow-green rather than pure green, with dominant wavelength of 573nm and peak wavelength of 575nm. Forward voltage of 2V is 0.1V lower than original. Millicandela rating of 50mcd significantly exceeds original specification. Viewing angle of 60° and lens size of 2.90mm remain within acceptable ranges. Product status is Active.

Frequently Asked Questions (FAQ)

Q: Can SLR-343MGT32 be used as a direct replacement for SLR-342MGT32?

A: Yes. SLR-343MGT32 is the parametric equivalent with identical primary electrical and mechanical specifications. Both parts are green diffused T-1 through-hole LEDs with 2.1V forward voltage, 10mA test current, 16mcd brightness, and 40° viewing angle. The primary difference is product status: SLR-343MGT32 is Active while SLR-342MGT32 is Not For New Designs. Height increases from 5.40mm to 5.60mm, which remains within standard PCB through-hole tolerances.

Q: What is the difference between dominant wavelength and peak wavelength specifications?

A: Dominant wavelength represents the single wavelength at which the LED appears to emit light to the human eye. Peak wavelength represents the wavelength at which the LED's spectral output reaches maximum intensity. For green indication applications, both specifications should fall within the 560nm to 575nm range. SLR-342MGT32 specifies dominant wavelength of 572nm; SLR-343MGT32 specifies peak wavelength of 563nm. Both are acceptable for green indication.

Q: Can I use a higher brightness LED (higher millicandela rating) as a substitute?

A: Yes, if circuit design accommodates increased brightness. Parts with higher millicandela ratings (such as 264-7SYGD/S530-E2 at 50mcd or 3GD-F at 25mcd) can replace the original 16mcd part. However, circuit current-limiting resistor values may require adjustment to prevent excessive brightness or reduced LED lifespan. Lower brightness parts (such as 3GDL-F at 4mcd) can also substitute if brightness reduction is acceptable for the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 Compliant, matching the compliance status of the original SLR-342MGT32. All parts carry REACH Unaffected or REACH Compliant status where specified.

Q: What is the significance of "Not For New Designs" product status?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends against using this part in new product designs. However, the part remains available for existing production support and maintenance. SLR-343MGT32 is the recommended upgrade path for new designs, offering identical specifications with Active product status and continued manufacturer support.

Q: Can I substitute a yellow-green LED (264-7SYGD/S530-E2) for a pure green LED (SLR-342MGT32)?

A: Substitution is possible only if the application accepts yellow-green color perception. The 264-7SYGD/S530-E2 has dominant wavelength of 573nm and peak wavelength of 575nm, which shifts the perceived color toward yellow compared to the original 572nm dominant wavelength. Visual appearance will differ. Electrical compatibility is maintained with 2V forward voltage (0.1V lower than original) and 20mA test current.

Q: What viewing angle should I select for my application?

A: Viewing angle determines the cone of light visibility. The original SLR-342MGT32 specifies 40° viewing angle. Narrower angles (35°) concentrate light in a specific direction; wider angles (60°) distribute light across a broader area. Selection depends on PCB layout and desired visibility pattern. All substitute parts maintain viewing angles between 35° and 60°, suitable for standard indication applications.

Q: Are there mechanical compatibility concerns with different height specifications?

A: Height variations between 4.50mm and 6.35mm are within standard through-hole PCB design tolerances. The original SLR-342MGT32 at 5.40mm height is typical for T-1 LEDs. Taller parts (up to 6.35mm) may require clearance verification in confined spaces. Shorter parts (4.50mm) provide additional clearance. All listed substitutes are mechanically compatible with standard through-hole PCB designs.

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