HLMP1790MP4B Equivalent & Substitute Parts Reference

Part Overview

The HLMP1790MP4B is a green diffused T-1 through-hole LED manufactured by Everlight Electronics Co Ltd, designed for LED indication applications requiring discrete 1.9V operation. This component features a 3.10mm diameter round domed lens with diffused green coloration and operates at 2mA test current with a 50° viewing angle. The part is currently in active product status with 983 pieces available in new original inventory.

Substitute parts are necessary when the original manufacturer discontinues production, when alternative sourcing improves lead times or cost efficiency, or when design requirements permit operation at different voltage or current levels while maintaining functional compatibility within the green LED indication category.

Key Parameters

Parameter	HLMP1790MP4B (Main Part)
Manufacturer	Everlight Electronics Co Ltd
Color	Green
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	3.10mm Dia
Voltage - Forward (Vf) Typical	1.9V
Current - Test	2mA
Millicandela Rating	1mcd
Viewing Angle	50°
Wavelength - Peak	565nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.30mm
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the HLMP1790MP4B is based on the following critical parameters that define functional compatibility:

Primary Compatibility Criteria:

Color: Green
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial
Wavelength - Peak: 565nm (±tolerance)

Secondary Compatibility Criteria:

Lens Style: Round with Domed Top
Lens Size: 3mm to 3.10mm diameter
Voltage - Forward (Vf): 1.9V to 2.1V range
Current - Test: 2mA to 20mA range
Viewing Angle: 35° to 60° range
Height (Max): 5.30mm to 6.55mm range

Parts are grouped as parametric equivalents when they share identical primary criteria and operate within specified secondary parameter ranges. Parts with deviations in voltage (5V, 12V) or lens transparency (clear vs. diffused) are classified as similar alternatives suitable only for applications where those parameter changes are acceptable.

Parameter Comparison

Parameter	HLMP1790MP4B	HLMP1790 (onsemi)	3GD-F (Bivar)	HLMP-1640 (Broadcom)	HLMP-1641 (Broadcom)	HLMP-1790 (Broadcom)	HLMP-1790-A0002 (Broadcom)	LTL-4231 (Lite-On)	SLI-343M8C3F (Rohm)
Manufacturer	Everlight	onsemi	Bivar Inc.	Broadcom	Broadcom	Broadcom	Broadcom	Lite-On	Rohm
Color	Green	Green	Green	Green	Green	Green	Green	Green	Green
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Clear
Lens Style	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed
Lens Size	3.10mm Dia	3mm T-1	3mm T-1	3mm T-1	3mm T-1	3mm T-1	3mm T-1	3mm T-1	3.10mm Dia
Voltage - Forward (Vf) Typical	1.9V	1.9V	2.1V	5V	12V	1.9V	1.9V	2.1V	2.2V
Current - Test	2mA	2mA	20mA	10mA	13mA	2mA	2mA	10mA	20mA
Millicandela Rating	1mcd	2mcd	25mcd	1.6mcd	1.6mcd	2.3mcd	2.3mcd	12.6mcd	150mcd
Viewing Angle	50°	50°	35°	60°	60°	50°	50°	40°	40°
Wavelength - Peak	565nm	565nm	568nm	565nm	565nm	565nm	565nm	565nm	N/A
Mounting Type	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
Height (Max)	6.30mm	6.30mm	5.30mm	6.35mm	6.35mm	6.35mm	6.35mm	6.55mm	5.60mm
Product Status	Active	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	N/A	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	983 Pcs	814,300 Pcs	1,419 Pcs	21,912 Pcs	4,525 Pcs	24,307 Pcs	26,157 Pcs	44,239 Pcs	9,041 Pcs

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

HLMP-1790 (Broadcom Limited) and HLMP-1790-A0002 (Broadcom Limited) are parametric equivalents to the HLMP1790MP4B. Both parts operate at 1.9V forward voltage with 2mA test current, maintain 50° viewing angle, and feature identical diffused green lens configuration with 565nm peak wavelength. Both are ROHS3 compliant and carry MSL 1 rating. The primary difference is packaging format: HLMP-1790 is supplied in bulk, while HLMP-1790-A0002 is supplied in cut tape format. Both parts are in active product status with substantial inventory availability (24,307 and 26,157 pieces respectively).

Compatible Alternatives (Parameter Variations Acceptable):

HLMP1790 (onsemi) operates at identical 1.9V and 2mA specifications with 50° viewing angle and 565nm wavelength. However, this part is classified as obsolete product status. Millicandela rating is 2mcd versus 1mcd for the main part. This part is suitable only if design application permits the increased brightness and if obsolete product status is acceptable for the application lifecycle.

HLMP-1641 (Broadcom Limited) is suitable for applications where higher voltage operation (12V) is required. This part maintains the diffused green lens, round domed style, and radial package configuration. Forward voltage is 12V at 13mA test current. Millicandela rating is 1.6mcd. This part is active status and ROHS3 compliant.

HLMP-1640 (Broadcom Limited) is suitable for applications where 5V operation is required. This part maintains diffused green lens, round domed style, and radial package. Forward voltage is 5V at 10mA test current. Millicandela rating is 1.6mcd. This part is active status and ROHS3 compliant with 21,912 pieces in inventory.

LTL-4231 (Lite-On Inc.) operates at 2.1V forward voltage with 10mA test current. Millicandela rating is 12.6mcd. Viewing angle is 40°. This part is active status and ROHS3 compliant with 44,239 pieces in inventory. Suitable when higher brightness is acceptable and circuit design permits 2.1V operation.

3GD-F (Bivar Inc.) operates at 2.1V forward voltage with 20mA test current. Millicandela rating is 25mcd. Viewing angle is 35°. Height is 5.30mm. This part is active status and ROHS3 compliant. Suitable when significantly higher brightness is required and circuit design permits 2.1V and 20mA operation.

Not Recommended as Direct Substitutes:

SLI-343M8C3F (Rohm Semiconductor) features clear lens transparency rather than diffused, and operates at 2.2V with 20mA test current. Millicandela rating is 150mcd. This part is suitable only for applications where clear lens and significantly higher brightness are required and where the visual appearance change is acceptable.

HLMP-1640-B00A1 and HLMP-1640-B00A2 (Broadcom Limited) feature right-angle mounting configuration rather than radial, and operate at 5V. These parts are suitable only for applications with right-angle PCB mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1790 (Broadcom) directly replace HLMP1790MP4B (Everlight)?

A: Yes. Both parts operate at 1.9V forward voltage with 2mA test current, feature diffused green lenses with 565nm peak wavelength, 50° viewing angle, and identical radial through-hole package configuration. The primary difference is packaging format (bulk versus original packaging). Both are ROHS3 compliant and MSL 1 rated.

Q: What is the difference between HLMP-1790 and HLMP-1790-A0002?

A: Both parts are electrically and mechanically identical. HLMP-1790 is supplied in bulk packaging, while HLMP-1790-A0002 is supplied in cut tape format. Selection depends on assembly process requirements and tape-and-reel compatibility with pick-and-place equipment.

Q: Can I use HLMP-1641 (12V) instead of HLMP1790MP4B (1.9V)?

A: Only if your circuit design operates at 12V and can accommodate 13mA test current. The parts share identical lens configuration, viewing angle, and radial package. However, direct voltage substitution without circuit redesign will result in component failure or incorrect operation.

Q: Why does LTL-4231 have higher millicandela rating than the main part?

A: LTL-4231 operates at 2.1V with 10mA test current versus 1.9V at 2mA for HLMP1790MP4B. The higher current and voltage result in increased light output. This part is suitable only if the application design permits higher brightness and the circuit can supply 10mA at 2.1V.

Q: Is SLI-343M8C3F (Rohm) compatible with HLMP1790MP4B?

A: SLI-343M8C3F is not a direct substitute. This part features clear lens transparency instead of diffused, operates at 2.2V with 20mA test current, and produces 150mcd brightness versus 1mcd for the main part. Use this part only if application requirements specifically call for clear lens and significantly higher brightness output.

Q: What does "diffused" lens mean and why does it matter?

A: Diffused lens scatters light output across a wider area with reduced peak intensity, creating a softer glow suitable for indicator applications. Clear lens concentrates light into a narrower beam with higher peak intensity. Substituting clear for diffused changes the visual appearance and light distribution pattern. Verify application requirements before substituting.

Q: Can I use right-angle mounting parts (HLMP-1640-B00A1, HLMP-1640-B00A2) as substitutes?

A: No. These parts feature right-angle mounting configuration designed for horizontal PCB mounting, whereas HLMP1790MP4B uses radial configuration for vertical through-hole mounting. Physical mounting orientation is incompatible. Use these parts only if PCB design specifically requires right-angle LED mounting.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All recommended substitute parts carry ROHS3 compliance, ensuring environmental and regulatory compatibility with the original part.

Q: Why is onsemi HLMP1790 listed as obsolete?

A: Obsolete product status indicates the manufacturer has discontinued production. While 814,300 pieces remain in inventory, future availability is not guaranteed. Use this part only if current inventory is sufficient for the entire product lifecycle and if alternative sourcing is not available.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All recommended substitute parts carry MSL 1 rating, eliminating moisture-related reliability concerns.

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