HLMP1440 Equivalent & Substitute Parts

Part Overview

The HLMP1440 is a yellow LED indicator in T-1 (3mm) through-hole package manufactured by onsemi. This discrete radial LED operates at 2.2V forward voltage with 60mcd brightness and 585nm peak wavelength, designed for standard indication applications. The product is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with T-1 through-hole mounting and yellow color specification while accommodating variations in electrical performance parameters.

Key Parameters

Parameter	Value
Color	Yellow
Lens Transparency	Clear
Lens Size	3mm, T-1
Mounting Type	Through Hole
Package / Case	Radial
Voltage - Forward (Vf) (Typ)	2.2V
Current - Test	10mA
Millicandela Rating	60mcd
Wavelength - Peak	585nm
Viewing Angle	45°

Substitute Part Grouping Explanation

Substitution logic for the HLMP1440 is based on the following criteria:

Primary Compatibility Requirements:

Color: Yellow (maintained across all substitutes)
Mounting Type: Through Hole (radial configuration)
Lens Size: T-1 (3mm) package
Lens Transparency: Clear (primary requirement)
Package / Case: Radial

Electrical Parameter Tolerance:

Forward Voltage (Vf): 1.9V to 2.2V range acceptable
Current - Test: 10mA to 20mA range acceptable
Millicandela Rating: 19mcd to 680mcd (brightness variation acceptable based on application requirements)
Wavelength - Peak: 583nm to 590nm range (yellow spectrum maintained)
Viewing Angle: 20° to 45° (application-dependent)

Product Status Consideration:

Active status substitutes are preferred for new designs
Not For New Designs status acceptable for legacy system maintenance
Obsolete status (original part) requires replacement

Substitutes are grouped by electrical characteristics and product status to enable selection based on specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd	Wavelength - Peak	Viewing Angle	Product Status	Lens Transparency
HLMP1440	onsemi	Yellow	2.2V	10mA	60mcd	585nm	45°	Obsolete	Clear
HLMP-1440	Broadcom Limited	Yellow	2.1V	20mA	45mcd	583nm	24°	Active	Clear
LTL-4252	Lite-On Inc.	Yellow	2.1V	10mA	19mcd	585nm	20°	Active	Clear
SLI-343Y8C3F	Rohm Semiconductor	Yellow	2.2V	20mA	680mcd	590nm	40°	Active	Clear
SLI-343YC3F	Rohm Semiconductor	Yellow	1.9V	20mA	350mcd	587nm	40°	Not For New Designs	Clear
SLI-343YCT32	Rohm Semiconductor	Yellow	1.9V	20mA	350mcd	587nm	40°	Active	Clear

Engineering Selection Recommendations

For Active Production (Recommended):

HLMP-1440 (Broadcom Limited) and SLI-343Y8C3F (Rohm Semiconductor) are active status parts suitable for new designs. HLMP-1440 maintains closest electrical compatibility with the original HLMP1440, with 2.1V forward voltage and 583nm wavelength within acceptable yellow spectrum range. SLI-343Y8C3F offers significantly higher brightness (680mcd) with matching 2.2V forward voltage, suitable for applications requiring enhanced visibility.

LTL-4252 (Lite-On Inc.) is active status with matching 10mA test current and 585nm wavelength identical to the original part, though brightness is reduced to 19mcd.

SLI-343YCT32 (Rohm Semiconductor) is active status in Tape & Box packaging, offering 350mcd brightness with 1.9V forward voltage and 587nm wavelength.

For Legacy System Maintenance:

SLI-343YC3F (Rohm Semiconductor) is marked Not For New Designs but remains available for maintenance applications requiring 350mcd brightness and 1.9V forward voltage operation.

Compliance Considerations:

All substitute parts listed maintain RoHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility with the original HLMP1440 specification.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1440 (Broadcom) directly replace HLMP1440 (onsemi)?

A: Yes. Both parts maintain yellow color, T-1 through-hole radial package, and clear lens transparency. Forward voltage differs by 0.1V (2.1V vs 2.2V) and test current increases from 10mA to 20mA. Brightness reduces from 60mcd to 45mcd. Wavelength remains within yellow spectrum (583nm vs 585nm). Circuit design must accommodate the 20mA test current requirement.

Q: What is the difference between SLI-343YC3F and SLI-343YCT32?

A: Both parts are electrically identical (1.9V, 20mA, 350mcd, 587nm, 40° viewing angle, yellow clear lens). The difference is packaging: SLI-343YC3F is supplied in Bulk, while SLI-343YCT32 is supplied in Tape & Box (TB). SLI-343YCT32 is active status; SLI-343YC3F is Not For New Designs.

Q: Why does SLI-343Y8C3F have significantly higher brightness (680mcd)?

A: SLI-343Y8C3F is part of the EXCELED™ series from Rohm Semiconductor, designed for high-brightness indication applications. The 680mcd rating reflects enhanced LED die performance while maintaining the same 2.2V forward voltage and T-1 package form factor as the original HLMP1440.

Q: Are all substitutes compatible with the same PCB footprint?

A: Yes. All listed substitutes maintain T-1 (3mm) through-hole radial package configuration with identical mechanical mounting compatibility. Height variations (5.60mm to 6.55mm maximum) are within standard through-hole assembly tolerances.

Q: Which substitute is recommended for new designs?

A: HLMP-1440 (Broadcom Limited) or SLI-343Y8C3F (Rohm Semiconductor) are recommended. Both are active status. HLMP-1440 provides closest electrical match to the original part. SLI-343Y8C3F offers higher brightness for enhanced visibility applications.

Q: Can I use parts marked "Not For New Designs"?

A: Parts marked Not For New Designs (SLI-343YC3F) are suitable for maintenance and repair of existing systems but should not be selected for new product development. Active status parts are preferred for all new designs.

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