SLI-570DT3F Equivalent & Substitute Parts

Part Overview

The SLI-570DT3F is an orange LED indicator manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This T-1 3/4 form factor LED operates at 1.9V forward voltage with a 3000mcd brightness rating and 611nm dominant wavelength. The component is active in production status and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while meeting the same application requirements.

Key Parameters

Parameter	SLI-570DT3F
Manufacturer	Rohm Semiconductor
Color	Orange
Wavelength - Dominant	611nm
Voltage - Forward (Vf) (Typ)	1.9V
Current - Test	20mA
Millicandela Rating	3000mcd
Lens Size	5mm, T-1 3/4
Viewing Angle	20°
Mounting Type	Through Hole
Height (Max)	8.85mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SLI-570DT3F are identified based on the following criteria:

Primary Substitutes (Orange Color, T-1 3/4 Form Factor):

Dominant wavelength range: 605nm to 611nm
Forward voltage tolerance: 1.98V to 2.2V
Mounting type: Through Hole
Lens size: 5mm, T-1 3/4
Package/Case: Radial
Regulatory compliance: RoHS3 Compliant, REACH Unaffected

Secondary Substitutes (Yellow Color, T-1 3/4 Form Factor):

Included where mechanical compatibility and electrical operating parameters align
Dominant wavelength range: 589nm to 592nm
Forward voltage tolerance: 2.0V to 2.1V
Mounting type: Through Hole
Lens size: 5mm, T-1 3/4
Package/Case: Radial
Regulatory compliance: RoHS3 Compliant

The substitution logic prioritizes color match and wavelength compatibility, followed by electrical parameters (forward voltage and test current) and mechanical form factor (T-1 3/4 through-hole radial package).

Parameter Comparison

Part Number	Manufacturer	Color	Wavelength (nm)	Vf (Typ)	mcd Rating	Viewing Angle	Height (Max)	RoHS Status	REACH Status
SLI-570DT3F	Rohm Semiconductor	Orange	611	1.9V	3000	20°	8.85mm	ROHS3 Compliant	REACH Unaffected
HLMP-EJ30-NR0DD	Broadcom Limited	Orange	605	1.98V	1290	30°	8.91mm	ROHS3 Compliant	REACH Unaffected
WP7113SEC/J4	Kingbright	Orange	605	2.2V	8000	20°	8.60mm	ROHS3 Compliant	REACH Unaffected
SSL-LX5093SOC	Lumex Opto/Components Inc.	Orange	610	2.0V	2500	30°	8.60mm	ROHS3 Compliant	REACH Unaffected
151053YS04500	Würth Elektronik	Yellow	590	2.1V	1500	45°	8.85mm	ROHS3 Compliant	REACH Unaffected
5219466F	Dialight	Yellow	583	2.2V	140	24°	8.81mm	ROHS3 Compliant	REACH Unaffected
LTL2H3KSK	Lite-On Inc.	Yellow	590	2.05V	2500	15°	8.70mm	ROHS3 Compliant	REACH Affected
LTL2R3KSK	Lite-On Inc.	Yellow	590	2.05V	1150	30°	8.70mm	ROHS3 Compliant	REACH Affected
OVLFY3C7	TT Electronics/Optek Technology	Yellow	589	2.0V	7400	30°	8.70mm	ROHS3 Compliant	REACH Unaffected
OVLGY0C9B9	TT Electronics/Optek Technology	Yellow	589	2.0V	14000	8°	8.90mm	ROHS3 Compliant	REACH Unaffected
SSL-LX5093SYC	Lumex Opto/Components Inc.	Yellow	590	2.1V	1000	30°	8.60mm	ROHS3 Compliant	REACH Unaffected

Engineering Selection Recommendations

Orange LED Substitutes (Direct Color Match):

HLMP-EJ30-NR0DD (Broadcom Limited) provides the closest electrical compatibility with 1.98V forward voltage and 605nm wavelength. This part maintains active product status and full regulatory compliance. The 30° viewing angle differs from the original 20°, and brightness is lower at 1290mcd compared to 3000mcd.

WP7113SEC/J4 (Kingbright) offers significantly higher brightness at 8000mcd with matching 20° viewing angle. Forward voltage is elevated at 2.2V, and wavelength is 605nm. This part is suitable where increased luminous intensity is acceptable within circuit design constraints.

SSL-LX5093SOC (Lumex Opto/Components Inc.) provides balanced performance with 2500mcd brightness, 2.0V forward voltage, and 610nm wavelength. The 30° viewing angle represents a wider beam pattern than the original specification.

Yellow LED Substitutes (Alternative Color):

OVLFY3C7 (TT Electronics/Optek Technology) delivers high brightness at 7400mcd with 2.0V forward voltage and 589nm wavelength. REACH compliance is unaffected. This part is listed in the original substitute field and represents a high-intensity alternative.

OVLGY0C9B9 (TT Electronics/Optek Technology) provides the highest brightness option at 14000mcd with 2.0V forward voltage. The 8° viewing angle creates a narrow, concentrated beam pattern suitable for applications requiring focused illumination.

LTL2R3KSK (Lite-On Inc.) offers 1150mcd brightness with 2.05V forward voltage and 30° viewing angle. REACH status is affected, requiring compliance verification for specific applications.

All substitute parts maintain RoHS3 compliance and through-hole radial package compatibility with the original SLI-570DT3F.

Frequently Asked Questions (FAQ)

Q: Can I substitute an orange LED with a yellow LED?

A: Yes, if the application permits color change. Yellow LEDs (589–592nm) operate at slightly higher forward voltages (2.0–2.1V) compared to the orange original (1.9V). Circuit design must accommodate this voltage difference. Brightness and viewing angle characteristics differ across available yellow substitutes.

Q: What is the significance of forward voltage (Vf) differences?

A: Forward voltage determines the minimum voltage required to operate the LED. The original SLI-570DT3F operates at 1.9V. Substitutes with higher Vf (up to 2.2V) require adequate circuit voltage headroom. Lower Vf parts (1.98V) are more compatible with existing designs. Current-limiting resistor values may require adjustment based on Vf changes.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All listed substitutes maintain the T-1 3/4 through-hole radial package format with 5mm lens diameter. Height variations (8.60mm to 8.91mm) are within typical PCB clearance tolerances. Physical compatibility is confirmed across all substitutes.

Q: What does REACH Affected status mean?

A: REACH Affected indicates the part contains substances of concern under EU REACH regulations. LTL2H3KSK and LTL2R3KSK carry this designation. Applications subject to REACH compliance requirements should prioritize REACH Unaffected alternatives such as OVLFY3C7 or OVLGY0C9B9.

Q: How do brightness ratings (mcd) affect substitution?

A: Millicandela rating determines luminous intensity. The original 3000mcd can be substituted with lower brightness (1000–1290mcd) if visibility requirements permit, or higher brightness (7400–14000mcd) if circuit design accommodates increased current draw. Viewing angle interacts with brightness perception; narrow angles (8°–20°) concentrate light intensity, while wide angles (30°–45°) distribute it.

Q: Which substitute offers the best overall compatibility?

A: HLMP-EJ30-NR0DD (Broadcom Limited) provides the closest electrical match with 1.98V forward voltage and orange color. SSL-LX5093SOC (Lumex Opto/Components Inc.) offers balanced performance across brightness, voltage, and wavelength parameters. Selection depends on specific application requirements for color, brightness, and viewing angle.

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