HLMP1523 Equivalent & Substitute Parts

Part Overview

The HLMP1523 is a green diffused T-1 through-hole LED manufactured by onsemi, designed for discrete indication applications. This part operates at 2.2V forward voltage with a 10mcd brightness rating and features a 90° viewing angle. The HLMP1523 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the original electrical specifications and through-hole radial mounting configuration.

Key Parameters

Parameter	HLMP1523 Specification
Color	Green
Lens Transparency	Diffused
Voltage - Forward (Vf) (Typ)	2.2V
Current - Test	20mA
Millicandela Rating	10mcd
Lens Size	3mm, T-1
Viewing Angle	90°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.30mm
Wavelength - Peak	562nm

Substitute Part Grouping Explanation

Substitute parts for the HLMP1523 are grouped based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Color: Green
Lens Transparency: Diffused
Voltage - Forward (Vf): 2.2V or 2.1V (within acceptable operating range)
Current - Test: 10mA or 20mA
Mounting Type: Through Hole
Package / Case: Radial
Lens Style: Round with Domed Top

Secondary Considerations:

Millicandela Rating: Brightness variations acceptable within application tolerance
Viewing Angle: Range from 40° to 100° depending on circuit requirements
Wavelength - Peak: Green spectrum (555nm to 572nm)
Height: Variations within PCB layout constraints

Substitute parts meeting these criteria are functionally compatible with the HLMP1523 in standard indication applications.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status
HLMP1523	onsemi	Green	Diffused	2.2V	20mA	10mcd	90°	562nm	6.30mm	Obsolete
SLI-343M8G3F	Rohm Semiconductor	Green	Diffused	2.2V	20mA	150mcd	40°	572nm	5.60mm	Active
SLI-343P8G3F	Rohm Semiconductor	Green	Diffused	2.2V	20mA	22mcd	40°	560nm	5.60mm	Active
SLR-332MG3F	Rohm Semiconductor	Green	Diffused	2.1V	10mA	16mcd	85°	572nm	4.60mm	Active
SLR-343MG3F	Rohm Semiconductor	Green	Diffused	2.1V	10mA	16mcd	40°	572nm	5.60mm	Active
SLR-343PG3F	Rohm Semiconductor	Green	Diffused	2.1V	10mA	6.3mcd	40°	555nm	5.60mm	Last Time Buy
SSL-LX305F6GD	Lumex Opto/Components Inc.	Green	Diffused	2.2V	20mA	30mcd	60°	565nm	6.50mm	Active
SSL-LX305F6SGD	Lumex Opto/Components Inc.	Green	Diffused	2.2V	20mA	150mcd	60°	565nm	6.50mm	Active
SSL-LX30FT14GD	Lumex Opto/Components Inc.	Green	Diffused	2.2V	20mA	10mcd	100°	565nm	6.00mm	Active

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

For applications requiring closest electrical and optical match to the HLMP1523, select from Rohm Semiconductor EXCELED™ series or Lumex SSL-LX30 series parts. These manufacturers offer active product status with ROHS3 compliance and established supply chains.

SLI-343M8G3F and SLI-343P8G3F (Rohm Semiconductor) operate at identical 2.2V forward voltage and 20mA test current, matching the HLMP1523 electrical profile. Both are ROHS3 compliant and actively produced. SLI-343M8G3F provides higher brightness (150mcd) with narrower viewing angle (40°), while SLI-343P8G3F offers moderate brightness (22mcd) also at 40° viewing angle.

SSL-LX30FT14GD (Lumex) matches the HLMP1523 brightness specification (10mcd) at identical electrical parameters (2.2V, 20mA) with slightly wider viewing angle (100° vs 90°). This part provides the closest functional equivalence and is ROHS3 compliant with active production status.

SLR-332MG3F and SLR-343MG3F (Rohm Semiconductor) operate at reduced forward voltage (2.1V) and test current (10mA), suitable for applications with lower power budgets. Both are ROHS3 compliant and actively produced.

Avoid: SLR-343PG3F carries Last Time Buy status, indicating discontinued production. This part should not be selected for new designs requiring long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I substitute the HLMP1523 with any green diffused T-1 LED?

A: No. Substitutes must match the HLMP1523 in forward voltage (2.2V or 2.1V), test current (10mA or 20mA), mounting type (through-hole radial), and lens transparency (diffused). Brightness and viewing angle may vary within application tolerance, but electrical parameters are critical for circuit compatibility.

Q: What is the difference between 2.2V and 2.1V forward voltage substitutes?

A: The HLMP1523 operates at 2.2V typical forward voltage. Substitutes rated at 2.1V will draw slightly more current at the same applied voltage or require marginally higher voltage to achieve the same current. For most indication applications, this 0.1V difference is acceptable. Verify circuit design margins before selection.

Q: Why do some substitutes have higher brightness (mcd) ratings?

A: Brightness variations reflect different LED chip designs and lens optical properties. Higher mcd ratings (150mcd vs 10mcd) indicate greater light output at the same current. Selection depends on application requirements. For direct replacement in existing circuits, lower mcd parts (6.3mcd to 30mcd) provide closer visual equivalence to the original 10mcd specification.

Q: Does viewing angle affect substitution compatibility?

A: Viewing angle determines the light distribution pattern. The HLMP1523 provides 90° viewing angle. Substitutes range from 40° (narrow, directional) to 100° (wide, diffuse). Selection depends on circuit board layout and visibility requirements. Narrower angles concentrate light in a specific direction; wider angles distribute light more broadly.

Q: Are all substitute parts RoHS compliant?

A: All listed active substitutes are ROHS3 compliant. The HLMP1523 (obsolete) does not specify RoHS status. Lumex SSL-LX series and Rohm EXCELED™ series parts meet current environmental compliance requirements suitable for modern production.

Q: What is the height difference impact?

A: The HLMP1523 maximum height is 6.30mm. Substitutes range from 4.60mm to 6.50mm. Height variations affect PCB clearance and component density. Verify mechanical fit within your circuit board layout before final selection.

Q: Can I use SLR-343PG3F as a substitute?

A: SLR-343PG3F carries Last Time Buy status, indicating production discontinuation. This part should not be selected for new designs or applications requiring long-term component availability. Select from active status alternatives instead.

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