QL202HT Red LED T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The QL202HT is a red LED indicator from onsemi designed for through-hole applications in the T-1 (3mm) package format. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The QL202HT delivers 10mcd brightness at 1.7V forward voltage with a 32° viewing angle, suitable for standard indication circuits requiring discrete red LED functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	QL202HT
Manufacturer	onsemi
Color	Red
Lens Transparency	Clear
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	1.7V
Current - Test	10mA
Millicandela Rating	10mcd
Viewing Angle	32°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	5.20mm
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the QL202HT are selected based on the following allowed electrical and mechanical parameters:

Primary Compatibility Criteria:

Color: Red
Lens Transparency: Clear
Lens Size: 3mm, T-1 package
Mounting Type: Through Hole
Package / Case: Radial
Height (Max): 5.20mm

Electrical Tolerance Range:

Forward Voltage (Vf): 1.7V to 2.1V
Test Current: 10mA to 20mA
Millicandela Rating: 10mcd minimum
Viewing Angle: 32° to 45°

All three substitute parts meet the mechanical package requirements and operate within acceptable electrical parameter ranges for red LED indication applications. Substitutes differ in brightness output, forward voltage characteristics, and product compliance status.

Parameter Comparison

Parameter	QL202HT (Main)	HLMP-Y301-F0000	LTL-1CHEE	LTL1CHJETNN
Manufacturer	onsemi	Broadcom Limited	Lite-On Inc.	Lite-On Inc.
Color	Red	Red	Red	Red
Lens Transparency	Clear	Clear	Clear	Clear
Lens Size	3mm, T-1	3mm, T-1	3.10mm Dia	3mm, T-1
Voltage - Forward (Vf) Typical	1.7V	2.1V	2V	2.05V
Current - Test	10mA	20mA	20mA	20mA
Millicandela Rating	10mcd	19mcd	19mcd	180mcd
Viewing Angle	32°	45°	45°	45°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial
Height (Max)	5.20mm	5.20mm	5.20mm	5.20mm
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8541.41.0000	8541.41.0000	8541.41.0000	8541.41.0000

Engineering Selection Recommendations

HLMP-Y301-F0000 (Broadcom Limited)

Active product status with ROHS3 compliance
Closest electrical match with 2.1V forward voltage and 19mcd brightness
Suitable for designs requiring modern component compliance
Higher test current (20mA) requires circuit verification

LTL-1CHEE (Lite-On Inc.)

Active product status with ROHS3 compliance
Moderate brightness increase (19mcd) with 2V forward voltage
Slightly larger lens diameter (3.10mm) may require mechanical clearance verification
REACH affected status requires supply chain consideration

LTL1CHJETNN (Lite-On Inc.)

Active product status with ROHS3 compliance
Significantly higher brightness (180mcd) suitable for applications requiring enhanced visibility
Forward voltage of 2.05V remains within acceptable range
Highest inventory availability among substitutes
Brightness increase may require circuit current limiting adjustment

All substitute parts maintain identical mechanical package dimensions, MSL rating, and export classification as the original QL202HT.

Frequently Asked Questions (FAQ)

Q: Can I directly replace QL202HT with any of these substitute parts? A: Direct mechanical replacement is possible for all three substitutes due to identical T-1 package dimensions and radial configuration. However, electrical circuit parameters must be verified. The higher forward voltages (2V to 2.1V versus 1.7V) and increased test currents (20mA versus 10mA) require confirmation that existing current-limiting resistors and power supply specifications remain adequate.

Q: What is the primary difference between HLMP-Y301-F0000 and the Lite-On alternatives? A: HLMP-Y301-F0000 is manufactured by Broadcom Limited with a 2.1V forward voltage and 19mcd brightness. The Lite-On parts (LTL-1CHEE and LTL1CHJETNN) operate at 2V and 2.05V respectively. LTL1CHJETNN provides significantly higher brightness at 180mcd, making it suitable for applications requiring enhanced visibility compared to the original 10mcd specification.

Q: Does the lens size difference in LTL-1CHEE affect compatibility? A: LTL-1CHEE has a 3.10mm lens diameter compared to the standard 3mm T-1 specification. While the package height remains 5.20mm, mechanical clearance in the PCB mounting area should be verified to ensure no interference with adjacent components or board features.

Q: Are all substitutes RoHS compliant? A: Yes. All three substitute parts are ROHS3 compliant, whereas the original QL202HT is RoHS non-compliant. This compliance improvement is beneficial for modern manufacturing and regulatory requirements.

Q: What is the REACH status consideration for LTL-1CHEE? A: LTL-1CHEE is marked as REACH affected, meaning it may contain substances of concern under REACH regulations. This requires supply chain documentation and compliance verification depending on your application's regulatory jurisdiction. HLMP-Y301-F0000 and LTL1CHJETNN are both REACH unaffected.

Q: Which substitute offers the best inventory availability? A: LTL-1CHEE has the highest inventory at 56,990 pieces, followed by HLMP-Y301-F0000 at 50,178 pieces. LTL1CHJETNN has lower availability at 803 pieces.

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