SLA-580LT3F Red LED T-1 3/4 Through-Hole Equivalent & Substitute Parts

Part Overview

The SLA-580LT3F is a red LED indication component manufactured by Rohm Semiconductor, configured as a T-1 3/4 through-hole radial package. This discrete LED operates at 1.75V forward voltage with a 470mcd brightness rating and 10° viewing angle, designed for standard red indication applications. The part carries a "Not For New Designs" status, making identification of equivalent and substitute components essential for ongoing production support and design alternatives.

Key Parameters

Parameter	Value
Manufacturer Part Number	SLA-580LT3F
Manufacturer	Rohm Semiconductor
Color	Red
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	1.75V
Current - Test	20mA
Millicandela Rating	470mcd
Viewing Angle	10°
Wavelength - Peak	660nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	8.80mm
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the SLA-580LT3F is determined by the following critical parameters:

Primary Compatibility Criteria:

Color: Red
Mounting Type: Through Hole (Radial package)
Lens Size: 5mm, T-1 3/4 form factor
Current - Test: 20mA
Package / Case: Radial

Secondary Compatibility Considerations:

Voltage - Forward (Vf): Range 1.75V to 2.0V acceptable for most applications
Millicandela Rating: 470mcd to 7150mcd (brightness variations acceptable depending on application requirements)
Viewing Angle: 6° to 30° (application-dependent)
Wavelength - Peak: 623nm to 660nm (red spectrum range)
Height (Max): 8.80mm to 9.00mm (mechanical fit tolerance)
RoHS Status: ROHS3 Compliant (regulatory requirement)

The substitute parts listed below maintain the T-1 3/4 through-hole radial configuration and red color specification. Variations in forward voltage, brightness, and viewing angle reflect different application requirements within the red LED indication category.

Parameter Comparison

Parameter	SLA-580LT3F (Main)	151053RS03000	333-2SURC/S400-A8	383-2SDRC/S530-A4	383-2SURC/S400-A6	383-2SURC/S530-A3	383-2SURC/S530-A6	7343-2SURC/H2/S400-A7	7343-2SURC/H2/S400-A8	7343-2USRC/S1060	7383/R7C3-ARUB/P/MS
Manufacturer	Rohm Semiconductor	Würth Elektronik	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics	Everlight Electronics
Color	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red
Lens Size	5mm, T-1 3/4	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	1.75V	1.9V	2V	2V	2V	2V	2V	2V	2V	2V	2V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	470mcd	5000mcd	5000mcd	2780mcd	6300mcd	2500mcd	6300mcd	1600mcd	2000mcd	4000mcd	7150mcd
Viewing Angle	10°	30°	10°	6°	6°	6°	6°	30°	30°	30°	30°
Wavelength - Peak	660nm	631nm	632nm	650nm	632nm	632nm	632nm	632nm	632nm	639nm	632nm
Mounting Type	Through Hole	Through Hole	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	Radial	Radial
Height (Max)	8.80mm	8.85mm	8.90mm	8.90mm	8.90mm	8.90mm	8.90mm	8.85mm	8.85mm	8.85mm	9.00mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Minimal Design Changes):

Parts 7343-2SURC/H2/S400-A7, 7343-2SURC/H2/S400-A8, 7343-2USRC/S1060, and 7383/R7C3-ARUB/P/MS maintain the T-1 3/4 form factor and are all ROHS3 compliant with Active product status. These parts accommodate the forward voltage increase from 1.75V to 2V through standard current-limiting resistor adjustment in the circuit design. The 30° viewing angle in these parts provides broader light distribution compared to the original 10°.

For Brightness-Matched Applications:

383-2SURC/S530-A3 (2500mcd) and 383-2SDRC/S530-A4 (2780mcd) provide brightness levels closest to the original 470mcd specification when accounting for application-specific requirements. Both maintain T-1 3/4 packaging and 20mA test current.

For High-Brightness Applications:

383-2SURC/S400-A6 (6300mcd) and 7383/R7C3-ARUB/P/MS (7150mcd) offer significantly increased brightness for applications requiring enhanced visibility. These parts are ROHS3 compliant and maintain through-hole radial configuration.

Compliance Considerations:

All recommended substitute parts carry ROHS3 compliance matching the original SLA-580LT3F. Parts with Active product status ensure long-term availability and supply chain stability compared to the original "Not For New Designs" designation.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SLA-580LT3F with any of these substitute parts without circuit modification?

A: No. The forward voltage difference (1.75V original vs. 2V substitutes) requires adjustment of the current-limiting resistor in the circuit. The resistor value must be recalculated based on the new forward voltage to maintain 20mA test current. Mechanical fit is compatible due to identical T-1 3/4 through-hole radial packaging.

Q: What is the impact of the viewing angle difference between the original 10° and substitute parts at 6° or 30°?

A: Viewing angle determines the cone of light emission. A narrower angle (6°) concentrates light in a tighter beam, requiring more precise positioning for visibility. A wider angle (30°) distributes light over a broader area, improving visibility from off-axis positions. Selection depends on the specific application's viewing geometry requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed carry ROHS3 compliance. Parts 333-2SURC/S400-A8, 383-2SDRC/S530-A4, and 383-2SURC/S530-A6 do not specify RoHS status in the provided data. Verify compliance documentation with the supplier before selection if RoHS certification is a regulatory requirement.

Q: Why do substitute parts have higher brightness ratings than the original?

A: The SLA-580LT3F at 470mcd represents a lower-brightness indication LED. Substitute parts from Everlight and Würth Elektronik span a broader brightness range (1600mcd to 7150mcd) to serve different application requirements. Selection should match the specific brightness needed for the application rather than defaulting to the highest available rating.

Q: What is the significance of the wavelength difference between 660nm (original) and 623nm to 650nm (substitutes)?

A: All values remain within the red spectrum visible range. The 660nm original represents deep red, while 623nm to 650nm substitutes represent standard red to orange-red. The difference is perceptually minimal for indication applications but may be relevant for color-critical applications or specific regulatory requirements.

Q: Can I use 151053RS03000 from Würth Elektronik as a substitute?

A: Yes, with circuit modification. This part maintains T-1 3/4 through-hole radial packaging, 20mA test current, and ROHS3 compliance. The 1.9V forward voltage and 5000mcd brightness differ from the original, requiring resistor recalculation and brightness evaluation for the specific application.

Q: Which substitute part is best for long-term production support?

A: All substitute parts listed carry Active product status, ensuring ongoing availability. Everlight Electronics parts dominate the substitute list, providing multiple options with consistent supply chain support. Würth Elektronik's 151053RS03000 offers an alternative single-source option with Active status.

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