SLA-570LT3F Equivalent & Substitute Parts

Part Overview

The SLA-570LT3F is a red LED indication component manufactured by Rohm Semiconductor, configured as a T-1 3/4 through-hole radial device with a 5mm round domed lens. This part is designated as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing production support and design updates. The component operates at 1.75V forward voltage with a 220mcd brightness rating and 660nm peak wavelength, serving standard red LED indication applications in discrete circuit implementations.

Key Parameters

Parameter	SLA-570LT3F Value
Color	Red
Lens Style	Round with Domed Top
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	1.75V
Current - Test	20mA
Millicandela Rating	220mcd
Viewing Angle	25°
Mounting Type	Through Hole
Wavelength - Peak	660nm
Package / Case	Radial
Height (Max)	8.95mm
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the SLA-570LT3F is determined by the following critical parameters: red color, 5mm round domed lens configuration, through-hole radial mounting, and compatibility within standard LED indication circuit requirements. All identified substitute parts are manufactured by CreeLED, Inc. under the C503B base product number and maintain the same lens style, lens size, mounting type, and package configuration as the original component.

The substitute parts are grouped by two primary variables: millicandela rating (brightness level) and physical height. The C503B series variants provide brightness options ranging from 4430mcd to 7500mcd, with maximum heights of either 10.10mm or 13.30mm. All substitutes operate at 2.1V forward voltage with 20mA test current, 23° viewing angle, and 624nm dominant wavelength. These electrical and mechanical parameters fall within the allowable substitution envelope for red LED indication applications using 5mm through-hole components.

Parameter Comparison

Parameter	SLA-570LT3F	C503B-RBN-CW0X0AA2	C503B-RBN-CW0Z0AA1	C503B-RBN-CW0Z0AA2	C503B-RBN-CX0Y0AA1	C503B-RBN-CX0Y0AA2	C503B-RBS-CW0X0AA1	C503B-RBS-CW0X0AA2	C503B-RBS-CW0Z0AA1	C503B-RBS-CX0Y0AA1	C503B-RCN-CYAYBAA1-030
Manufacturer	Rohm Semiconductor	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.	CreeLED, Inc.
Color	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top
Lens Size	5mm, T-1 3/4	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia	5.00mm Dia
Voltage - Forward (Vf) (Typ)	1.75V	2.1V	2.1V	2.1V	2.1V	2.1V	2.1V	2.1V	2.1V	2.1V	2.1V
Current - Test	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Millicandela Rating	220mcd	4430mcd	7500mcd	7500mcd	6190mcd	6190mcd	4430mcd	4430mcd	7500mcd	6190mcd	6180mcd
Viewing Angle	25°	23°	23°	23°	23°	23°	23°	23°	23°	23°	30°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Wavelength - Peak	660nm	—	—	—	—	—	—	—	—	—	—
Wavelength - Dominant	—	624nm	624nm	624nm	624nm	624nm	624nm	624nm	624nm	624nm	624nm
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	8.95mm	10.10mm	10.10mm	10.10mm	10.10mm	10.10mm	13.30mm	13.30mm	13.30mm	13.30mm	10.30mm
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All C503B series substitute parts from CreeLED, Inc. maintain active product status, ensuring long-term availability and manufacturing support. Each substitute variant carries RoHS compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements equivalent to the original SLA-570LT3F component.

Selection among substitute options depends on application-specific brightness requirements and physical space constraints. The C503B variants with 10.10mm maximum height provide closer dimensional compatibility with the original 8.95mm height specification. The C503B-RBN and C503B-RBS series offer brightness ratings from 4430mcd to 7500mcd, accommodating applications requiring higher luminous intensity than the original 220mcd rating. The C503B-RCN-CYAYBAA1-030 variant provides a 30° viewing angle, compared to the original 25° specification, for applications requiring wider light distribution.

Forward voltage differences between the original component (1.75V) and all substitutes (2.1V) require circuit-level evaluation to ensure proper current-limiting resistor sizing and overall power budget compatibility.

Frequently Asked Questions (FAQ)

Q: Can C503B series LEDs directly replace the SLA-570LT3F without circuit modifications?

A: C503B substitutes share identical lens style, lens size, mounting type, and package configuration with the SLA-570LT3F. However, the forward voltage difference (1.75V original versus 2.1V substitutes) requires recalculation of series resistor values to maintain proper 20mA test current operation. Mechanical fit is compatible for through-hole PCB applications.

Q: What is the brightness difference between the original and substitute parts?

A: The SLA-570LT3F operates at 220mcd. C503B substitutes range from 4430mcd to 7500mcd depending on variant selection. This represents a significant brightness increase, which may require optical design review if the original application relied on specific luminous intensity characteristics.

Q: Are all C503B variants suitable for the same applications?

A: All C503B variants maintain red color, 5mm round domed lens configuration, and through-hole radial mounting. Selection among variants depends on required brightness level and physical height constraints. The 10.10mm height variants provide closer dimensional compatibility with the original 8.95mm specification compared to 13.30mm height options.

Q: What packaging options are available for C503B substitutes?

A: C503B parts are supplied in Bulk, Tape & Box (TB), and Cut Tape (CT) packaging formats. Packaging selection does not affect electrical or mechanical performance and is determined by procurement and assembly process requirements.

Q: How do viewing angles compare between the original and substitutes?

A: The SLA-570LT3F specifies 25° viewing angle. Most C503B variants provide 23° viewing angle. The C503B-RCN-CYAYBAA1-030 variant offers 30° viewing angle for applications requiring wider light distribution patterns.

Q: Are compliance certifications equivalent between the original and substitute parts?

A: The SLA-570LT3F carries ROHS3 compliance. All C503B substitutes carry RoHS compliance certification. Both designations meet current regulatory requirements. All parts are REACH unaffected and carry EAR99 ECCN classification.

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