SLA-570MT3F Equivalent & Substitute Parts

Part Overview

The SLA-570MT3F is a green LED indicator manufactured by Rohm Semiconductor, designed for through-hole mounting applications. This T-1 3/4 (5mm) radial LED operates at 2.3V forward voltage with a 470mcd brightness rating and 563nm peak wavelength. The part is marked as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and designs requiring compatible green LED indicators with similar electrical and mechanical characteristics.

Key Parameters

Parameter	SLA-570MT3F
Manufacturer	Rohm Semiconductor
Color	Green
Lens Size	5mm, T-1 3/4
Lens Style	Round with Domed Top
Lens Transparency	Clear
Voltage - Forward (Vf) (Typ)	2.3V
Current - Test	20mA
Millicandela Rating	470mcd
Wavelength - Peak	563nm
Viewing Angle	25°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	8.85mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SLA-570MT3F is determined by the following critical parameters:

Physical Form Factor: T-1 3/4 (5mm) through-hole radial package with round domed lens
Electrical Compatibility: Forward voltage (Vf) range and test current (20mA)
Optical Characteristics: Green color, clear lens, peak wavelength in the green spectrum (515–575nm)
Mechanical Fit: Maximum height and radial lead configuration for PCB mounting
Compliance: RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Category A - Direct Form Factor Substitutes (T-1 3/4 Package): Parts maintaining identical package geometry and mounting footprint, suitable for direct PCB replacement without layout modification.

Category B - Functional Equivalents (5mm Round Package): Parts with compatible electrical and optical characteristics but different physical dimensions, requiring PCB layout verification before substitution.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	mcd Rating	Peak Wavelength	Viewing Angle	Height (Max)	Lens Size	Product Status	RoHS3
SLA-570MT3F	Rohm Semiconductor	2.3V	470mcd	563nm	25°	8.85mm	5mm, T-1 3/4	Not For New Designs	Yes
5219465F	Dialight	2.3V	120mcd	565nm	24°	8.81mm	4.83mm, T-1 3/4	Active	Yes
HLMP-CM1G-350DD	Broadcom Limited	3.1V	43000mcd	517nm	15°	8.90mm	5mm, T-1 3/4	Active	Yes
HLMP-CM1H-350DD	Broadcom Limited	3.1V	43000mcd	517nm	15°	12.64mm	5mm, T-1 3/4	Active	Yes
HLMP-CM3A-Z10DD	Broadcom Limited	3.2V	16500mcd	516nm	30°	8.90mm	5mm, T-1 3/4	Active	Yes
HLMP-CM3B-Z10DD	Broadcom Limited	3.2V	16500mcd	516nm	30°	12.25mm	5mm, T-1 3/4	Active	Yes
151053GS03000	Würth Elektronik	3.4V	10000mcd	515nm	30°	8.85mm	5.00mm Dia	Active	Yes
333-2SUGC/C525	Everlight Electronics Co Ltd	4.6V	2000mcd	518nm	10°	8.90mm	5.00mm Dia	Active	No
333-2SUGC/S400-A5	Everlight Electronics Co Ltd	3.4V	12500mcd	525nm	10°	8.90mm	5.00mm Dia	Active	Yes
7344-15SUGC/S400-A5	Everlight Electronics Co Ltd	3.3V	8000mcd	518nm	30°	8.90mm	4.60mm Dia	Active	No

Engineering Selection Recommendations

Direct Replacement (Preferred for Existing Designs)

For applications requiring minimal PCB modification, the following active parts maintain T-1 3/4 package geometry:

HLMP-CM1G-350DD (Broadcom Limited): Maintains 5mm T-1 3/4 form factor with 8.90mm height. Forward voltage is 3.1V (0.8V higher than SLA-570MT3F), requiring circuit verification. Brightness is significantly higher (43000mcd vs 470mcd). Suitable for designs where increased brightness is acceptable or beneficial.
HLMP-CM3A-Z10DD (Broadcom Limited): Maintains 5mm T-1 3/4 form factor with 8.90mm height. Forward voltage is 3.2V, brightness is 16500mcd. Wider viewing angle (30° vs 25°) provides improved visibility across viewing planes.
5219465F (Dialight): Closest electrical match with 2.3V forward voltage and 565nm peak wavelength. Maintains T-1 3/4 package with 8.81mm height. Brightness is lower (120mcd vs 470mcd), suitable for applications where reduced brightness is acceptable.

Functional Equivalents (Requires PCB Layout Verification)

333-2SUGC/S400-A5 (Everlight Electronics Co Ltd): Active status with RoHS3 compliance. 5mm round package with 3.4V forward voltage and 12500mcd brightness. Requires PCB footprint verification due to different lens size specification.
151053GS03000 (Würth Elektronik): Active status with RoHS3 compliance. 5mm round package with 3.4V forward voltage and 10000mcd brightness. Maintains 8.85mm height matching original part.

Not Recommended

HLMP-CM1H-350DD: Extended height (12.64mm) may conflict with PCB clearance requirements.
HLMP-CM3B-Z10DD: Extended height (12.25mm) may conflict with PCB clearance requirements.
333-2SUGC/C525: Lacks RoHS3 compliance certification.
7344-15SUGC/S400-A5: Lacks RoHS3 compliance certification and uses non-standard 4.60mm lens diameter.
383-2SYGC/S530-E2: Yellow-green color (573nm) differs from green specification; not suitable for color-critical applications.

Frequently Asked Questions (FAQ)

Q: Can I use HLMP-CM1G-350DD as a direct replacement for SLA-570MT3F?

A: HLMP-CM1G-350DD maintains the same T-1 3/4 package and physical form factor, allowing direct PCB mounting without layout changes. However, the forward voltage is 3.1V compared to 2.3V in the original part. Your circuit must accommodate this voltage difference. The significantly higher brightness (43000mcd vs 470mcd) may require current-limiting resistor adjustment to prevent over-brightness in the application.

Q: What is the key difference between Category A and Category B substitutes?

A: Category A substitutes (HLMP-CM1G-350DD, HLMP-CM3A-Z10DD, 5219465F) maintain the T-1 3/4 package geometry, allowing direct PCB replacement without footprint modification. Category B substitutes (151053GS03000, 333-2SUGC/S400-A5, 7344-15SUGC/S400-A5) use standard 5mm round packages with different lens diameter specifications, requiring PCB layout verification before substitution.

Q: Why is forward voltage (Vf) important when selecting a substitute?

A: Forward voltage determines the voltage drop across the LED during operation. The SLA-570MT3F operates at 2.3V. Substitutes with higher Vf (3.1V–4.6V) require different current-limiting resistor values to maintain proper brightness and prevent circuit malfunction. Circuit redesign may be necessary for parts with significantly different Vf ratings.

Q: Can I use 333-2SUGC/C525 as a substitute?

A: 333-2SUGC/C525 is electrically and optically compatible but lacks RoHS3 compliance certification. If your application requires RoHS3 compliance for regulatory or supply chain requirements, this part is not suitable. Use 333-2SUGC/S400-A5 instead, which provides equivalent functionality with RoHS3 compliance.

Q: What does the height specification mean, and why does it matter?

A: Height (Max) specifies the maximum vertical dimension of the LED from the PCB surface. The SLA-570MT3F has a maximum height of 8.85mm. Parts like HLMP-CM1H-350DD (12.64mm) and HLMP-CM3B-Z10DD (12.25mm) exceed this height and may interfere with enclosures, shields, or adjacent components. Verify clearance before substitution.

Q: Is 5219465F a suitable replacement despite lower brightness?

A: 5219465F is the closest electrical match with identical 2.3V forward voltage and similar 565nm peak wavelength. The lower brightness (120mcd vs 470mcd) makes it suitable only for applications where reduced brightness is acceptable or where the original part was over-specified. Verify that the lower brightness meets your visibility requirements before substitution.

Q: Why should I avoid parts with extended height?

A: Extended-height parts (HLMP-CM1H-350DD at 12.64mm, HLMP-CM3B-Z10DD at 12.25mm) may not fit within the physical constraints of your enclosure or PCB assembly. If the original design allocated 8.85mm clearance, these taller parts will cause mechanical interference. Measure available clearance before considering these alternatives.

Q: What compliance certifications should I verify?

A: All recommended substitutes maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SLA-570MT3F specifications. Verify that your supply chain and regulatory requirements align with these certifications before final part selection.

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