HLMP1302 Red Diffused T-1 LED Equivalent & Substitute Parts

Part Overview

The HLMP1302 is a red diffused T-1 through-hole LED manufactured by onsemi, designed for discrete red LED indication applications. Specified at 2V forward voltage with 4mcd brightness and a 90° viewing angle, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Manufacturer Part Number	HLMP1302
Manufacturer	onsemi
Product Status	Obsolete
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	4mcd
Viewing Angle	90°
Mounting Type	Through Hole
Wavelength - Peak	635nm
Package / Case	Radial
Height (Max)	6.30mm
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the HLMP1302 are selected based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

Color: Red
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
Wavelength - Peak: 625nm to 650nm range

Secondary Compatibility Parameters:

Voltage - Forward (Vf): 1.7V to 2.2V (acceptable range for circuit redesign)
Current - Test: 2mA to 20mA (design-dependent)
Millicandela Rating: 1.8mcd to 40mcd (application-specific brightness requirements)
Viewing Angle: 35° to 90° (circuit layout dependent)
Height (Max): 4.50mm to 6.35mm (PCB clearance dependent)

Substitute parts are grouped by product status (Active vs. Not For New Designs) and compliance certifications (RoHS3, REACH Unaffected) to support long-term design viability.

Parameter Comparison

Part Number	Manufacturer	Product Status	Color	Vf (Typ)	Current - Test	mcd	Viewing Angle	Wavelength - Peak	Height (Max)	RoHS Status
HLMP1302	onsemi	Obsolete	Red	2V	10mA	4mcd	90°	635nm	6.30mm	Not specified
151031SS06000	Würth Elektronik	Active	Red	2.2V	20mA	35mcd	60°	650nm	5.55mm	ROHS3 Compliant
3HD-F	Bivar Inc.	Active	Red	2V	20mA	30mcd	35°	625nm	5.30mm	ROHS3 Compliant
3RD-F	Bivar Inc.	Active	Red	2.1V	20mA	2mcd	35°	700nm	5.30mm	ROHS3 Compliant
3SRD-F	Bivar Inc.	Active	Red	1.7V	20mA	40mcd	35°	645nm	5.30mm	ROHS3 Compliant
3SRD-S	Bivar Inc.	Active	Red	1.7V	20mA	40mcd	40°	645nm	4.50mm	ROHS3 Compliant
4300F1LC	Visual Communications Company - VCC	Not For New Designs	Red	1.8V	2mA	1.8mcd	50°	635nm	6.35mm	ROHS3 Compliant
HLMP-1301-G00FG	Broadcom Limited	Active	Red	1.9V	10mA	8.6mcd	60°	635nm	6.35mm	ROHS3 Compliant
HLMP-1600	Broadcom Limited	Active	Red	5V	10mA	2.1mcd	60°	635nm	6.35mm	ROHS3 Compliant
HLMP-1600-D00A1	Broadcom Limited	Active	Red	5V	10mA	2.1mcd	60°	635nm	Not specified	ROHS3 Compliant
HLMP-1600-D00A2	Broadcom Limited	Active	Red	5V	10mA	2.1mcd	60°	635nm	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

For applications requiring direct electrical compatibility with minimal circuit redesign, the 3HD-F from Bivar Inc. provides the closest match to the HLMP1302. Both operate at 2V forward voltage with identical lens size (3mm, T-1) and radial through-hole mounting. The 3HD-F is ROHS3 compliant and actively manufactured, ensuring long-term availability.

The HLMP-1301-G00FG from Broadcom Limited offers an alternative with active product status and ROHS3 compliance. Operating at 1.9V forward voltage with 8.6mcd brightness and 60° viewing angle, this part requires minimal circuit adjustment while maintaining compatibility with the T-1 form factor.

For Higher Brightness Applications:

The 3SRD-F and 3SRD-S from Bivar Inc. deliver 40mcd brightness, significantly higher than the HLMP1302's 4mcd rating. Both operate at 1.7V forward voltage and are ROHS3 compliant. The 3SRD-S variant offers reduced height (4.50mm) for space-constrained layouts.

For 5V Circuit Integration:

The HLMP-1600 and its variants (HLMP-1600-D00A1, HLMP-1600-D00A2) from Broadcom Limited operate at 5V forward voltage, suitable for direct integration into 5V logic circuits without series resistor recalculation. All variants are ROHS3 compliant and actively produced.

Not Recommended for New Designs:

The 4300F1LC from Visual Communications Company is classified as "Not For New Designs" and should be avoided for new production applications despite ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the HLMP1302 be directly replaced with any of these substitutes without circuit modification?

A: Direct replacement without modification is limited to parts with matching forward voltage (2V) and similar brightness characteristics. The 3HD-F from Bivar Inc. provides the closest direct substitution. Parts with different forward voltages (such as HLMP-1600 at 5V or 3SRD-F at 1.7V) require circuit redesign, specifically recalculation of series resistor values.

Q: What is the significance of the viewing angle difference between the HLMP1302 (90°) and substitute parts (35° to 60°)?

A: Viewing angle determines the light distribution pattern. The HLMP1302's 90° angle provides wider light dispersion, while substitute parts with 35° to 60° angles concentrate light in a narrower cone. Selection depends on the application's optical requirements and PCB layout. Narrower angles may require precise component positioning.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original HLMP1302 does not specify RoHS status. For applications requiring RoHS3 certification, any of the listed substitutes are acceptable from a compliance perspective.

Q: What is the difference between the HLMP-1600 variants (D00A1 and D00A2)?

A: Both HLMP-1600-D00A1 and HLMP-1600-D00A2 share identical electrical specifications (5V, 10mA, 2.1mcd, 60° viewing angle, 635nm peak wavelength) and are right-angle mounted variants of the standard HLMP-1600. The designation difference indicates manufacturing or packaging variations. Both are suitable substitutes for applications requiring right-angle mounting.

Q: How does the millicandela rating affect component selection?

A: Millicandela (mcd) rating indicates brightness intensity. The HLMP1302 operates at 4mcd. Substitute parts range from 1.8mcd to 40mcd. Higher mcd ratings provide brighter indication but may require circuit current limiting adjustment. Lower mcd ratings may necessitate increased test current or circuit redesign for adequate visibility.

Q: Can I use the HLMP-1600 series (5V) as a substitute in a 2V circuit?

A: No. The HLMP-1600 series operates at 5V forward voltage and is designed for 5V logic circuits. Direct substitution in a 2V circuit would result in component failure. Circuit redesign is required, including power supply modification and series resistor recalculation.

Q: What does "Not For New Designs" mean for the 4300F1LC?

A: This designation indicates the manufacturer has discontinued active development and recommends against using this part in new product designs. While existing inventory may be available, long-term supply cannot be guaranteed. Active alternatives should be prioritized for new applications.

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