HLMP1521 Green LED T-1 Equivalent & Substitute Parts

Part Overview

The HLMP1521 is a green LED indicator in T-1 through-hole package manufactured by onsemi. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The HLMP1521 features a 3mm clear lens with 12mcd brightness rating and 2.1V forward voltage, designed for standard LED indication circuits requiring green wavelength output at 565nm peak.

Substiute Parts

HLMP1521

onsemiIn Stock: 936HLMP1521 Datasheet

Current PartRFQ

HLMP-1521

Broadcom LimitedIn Stock: 2253HLMP-1521 Datasheet

DirectRFQ

SLI-343MC3F

Rohm SemiconductorIn Stock: 1631SLI-343MC3F Datasheet

SimilarRFQ

SLI-343MG3F

Rohm SemiconductorIn Stock: 10850SLI-343MG3F Datasheet

SimilarRFQ

SLI-343P8C3F

Rohm SemiconductorIn Stock: 23966SLI-343P8C3F Datasheet

SimilarRFQ

HLMP1520

onsemiIn Stock: 1048HLMP1520 Datasheet

Parametric EquivalentRFQ

HLMP1521

onsemiIn Stock: 936HLMP1521 Datasheet

Parametric EquivalentRFQ

MV5460

onsemiIn Stock: 761MV5460 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HLMP1521 is determined by the following critical parameters:

• Mounting Type: Through Hole (Radial package required)
• Lens Size: T-1 form factor (3mm or 3.10mm diameter acceptable)
• Color: Green wavelength output
• Voltage - Forward (Vf): 2.1V to 2.2V range
• Lens Transparency: Clear or Diffused acceptable for indication applications
• Package Compatibility: T-1 supplier device package

Substitute parts are grouped into three categories:

1. Direct Manufacturer Equivalent: HLMP-1521 (Broadcom Limited) - Active status replacement with identical electrical specifications
2. Similar Manufacturer Parts: SLI-343MC3F, SLI-343MG3F, SLI-343P8C3F (Rohm Semiconductor) - Compatible T-1 green LEDs with equivalent forward voltage and through-hole mounting
3. Parametric Equivalents: HLMP1520, MV5460 (onsemi) - Same manufacturer alternatives with matching green wavelength and forward voltage characteristics

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: HLMP-1521 (Broadcom Limited)

The HLMP-1521 from Broadcom Limited is the direct manufacturer equivalent with active product status. This part maintains identical electrical specifications (2.1V forward voltage, 10mA test current, 45° viewing angle) and mechanical compatibility with the original HLMP1521. The Broadcom part carries ROHS3 compliance certification and has 2220 units in stock, providing supply continuity for production applications.

Secondary Recommendations: SLI-343P8C3F (Rohm Semiconductor)

The SLI-343P8C3F offers active product status with compatible T-1 through-hole mounting and green clear lens configuration. Forward voltage is 2.2V (within acceptable tolerance), and wavelength output at 560nm remains within green spectrum. This part is ROHS3 compliant with 23,865 units available. Higher test current (20mA) and reduced viewing angle (40° vs 45°) require circuit evaluation.

Alternative: SLI-343MG3F (Rohm Semiconductor)

The SLI-343MG3F provides green diffused lens alternative with 180mcd brightness and 572nm wavelength. Product status is "Not For New Designs," limiting suitability for new production. Diffused lens transparency differs from original clear specification. Highest inventory availability (10,763 units) supports maintenance and repair applications.

Obsolete Alternatives: HLMP1520, MV5460 (onsemi)

HLMP1520 and MV5460 are parametric equivalents from onsemi with matching green wavelength and forward voltage. Both carry obsolete status, limiting long-term supply reliability. These parts are suitable only when direct Broadcom or Rohm alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1521 (Broadcom) directly replace HLMP1521 (onsemi)?

A: Yes. Both parts share identical electrical specifications (2.1V forward voltage, 10mA test current, 565nm peak wavelength) and mechanical form factor (T-1 through-hole radial package). The Broadcom part is the direct equivalent with active product status.

Q: What is the difference between clear and diffused lens options?

A: Clear lens (HLMP1521, HLMP-1521, SLI-343P8C3F) provides focused light output with defined viewing angle. Diffused lens (SLI-343MG3F) scatters light for wider, softer illumination. Selection depends on application requirements for light distribution and brightness perception.

Q: Are Rohm SLI-343 series parts compatible with the original circuit?

A: SLI-343 series parts are mechanically and electrically compatible for through-hole mounting. Forward voltage remains 2.1V to 2.2V, and green wavelength output (560nm to 572nm) is within acceptable range. Higher brightness ratings (22mcd to 200mcd) and test current variations (20mA) require circuit current-limiting evaluation.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active status indicates ongoing manufacturer support, supply availability, and design continuity. Obsolete status indicates discontinued production with limited remaining inventory. For new designs, select active status parts (HLMP-1521 Broadcom, SLI-343P8C3F Rohm). For maintenance, obsolete parts remain functional if inventory is available.

Q: Does lens size variation (3mm vs. 3.10mm) affect compatibility?

A: Both 3mm and 3.10mm T-1 packages fit standard through-hole PCB layouts. Height variation (6.30mm to 5.60mm) is within typical PCB clearance tolerances. Mechanical compatibility is maintained across all listed substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Broadcom HLMP-1521 and all Rohm SLI-343 series parts carry ROHS3 compliance certification. onsemi HLMP1520 and MV5460 do not specify RoHS status. For applications requiring RoHS compliance, select Broadcom or Rohm alternatives.