LTL-1CHA Equivalent & Substitute Parts

Part Overview

The LTL-1CHA is an amber diffused through-hole LED manufactured by Lite-On Inc., designed for discrete indication applications. This component features a 3.10mm diameter round domed lens with amber diffusion, operating at 2.1V forward voltage and 12.6mcd luminous intensity. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component sourcing.

Substiute Parts

LTL-1CHA

Lite-On Inc.In Stock: 2015LTL-1CHA Datasheet

Current PartRFQ

LTL1CHFL4D

Lite-On Inc.In Stock: 989LTL1CHFL4D Datasheet

MFR RecommendedRFQ

HLMP-K401

Broadcom LimitedIn Stock: 18316HLMP-K401 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LTL-1CHA is determined by the following critical parameters:

Primary Compatibility Criteria:

• Mounting type: Through hole radial configuration
• Lens size: 3.10mm diameter or compatible T-1 package
• Color specification: Amber or orange wavelength range (600-610nm dominant wavelength)
• Lens transparency: Diffused optical characteristics
• Voltage tolerance: Forward voltage within acceptable circuit design margins (1.9V to 2.1V)
• Current rating: Minimum 20mA test current capability

Substitute Parts Identified:

1. LTL1CHFL4D (Lite-On Inc.) - Active product status, same manufacturer base series, compatible radial through-hole package, 3.10mm lens diameter, diffused amber lens, 605nm dominant wavelength, 2.05V forward voltage, 20mA test current, 60° viewing angle maintained.

2. HLMP-K401 (Broadcom Limited) - Active product status, T-1 through-hole package (3mm equivalent), orange diffused lens, 602nm dominant wavelength matching original specification, 1.9V forward voltage, reduced test current (10mA), 60° viewing angle maintained.

Parameter Comparison

Engineering Selection Recommendations

LTL1CHFL4D Selection Rationale: This substitute maintains the highest compatibility with the original LTL-1CHA specification. Both components are manufactured by Lite-On Inc., share identical lens diameter (3.10mm), identical test current (20mA), and maintain diffused amber optical characteristics. Forward voltage variance (2.05V vs 2.1V) is within typical circuit design tolerance. The primary consideration is the reduced viewing angle (45° vs 60°), which may impact applications requiring wider light distribution. This part is currently in active production status with ROHS3 compliance maintained.

HLMP-K401 Selection Rationale: This Broadcom Limited substitute provides an alternative from an established LED manufacturer with active product status and ROHS3 compliance. The T-1 package (3mm) is mechanically compatible with standard through-hole PCB layouts. Dominant wavelength (602nm) matches the original specification exactly. The lower forward voltage (1.9V) reduces circuit power dissipation. However, the reduced test current (10mA vs 20mA) and significantly lower luminous intensity (2.1mcd vs 12.6mcd) indicate this part is suitable only for applications where reduced brightness is acceptable. The 60° viewing angle matches the original specification.

Frequently Asked Questions (FAQ)

Q: Can LTL1CHFL4D directly replace LTL-1CHA in all applications? A: LTL1CHFL4D is mechanically and electrically compatible with LTL-1CHA for most applications. The viewing angle is reduced from 60° to 45°, which may affect visibility in applications requiring wide-angle light distribution. Forward voltage difference (2.05V vs 2.1V) is negligible for standard circuit designs.

Q: What are the key differences between the two substitute options? A: LTL1CHFL4D maintains closer electrical and optical specifications to the original LTL-1CHA, including identical lens size and test current. HLMP-K401 offers lower forward voltage and reduced power consumption but with significantly lower luminous intensity and reduced test current, making it suitable only for lower-brightness indication applications.

Q: Is the T-1 package of HLMP-K401 compatible with LTL-1CHA PCB footprints? A: T-1 packages (3mm) are mechanically compatible with standard 3.10mm radial LED footprints on through-hole PCBs. Physical height differences (6.35mm vs 5.20mm) should be verified against PCB clearance requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. LTL-1CHA, LTL1CHFL4D, and HLMP-K401 are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the impact of forward voltage differences on circuit design? A: Forward voltage variations (1.9V to 2.1V) are within acceptable tolerance for standard LED indicator circuits. Series resistor values may require minor adjustment to maintain consistent current limiting, but redesign is not necessary for most applications.