LTL-433P Equivalent & Substitute Parts

Part Overview

The LTL-433P is a red diffused through-hole LED manufactured by Lite-On Inc., designed for indication applications. This Active product features a 657nm dominant wavelength with a 2.1V forward voltage and 1.1mcd brightness rating. The rectangular lens design (5.00mm x 2.00mm) with diffused transparency provides wide-angle visibility at 140°. This component is ROHS3 compliant and maintains 697 units in current inventory stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter tolerances for this LED category.

Substiute Parts

LTL-433P

Lite-On Inc.In Stock: 801LTL-433P Datasheet

Current PartRFQ

XSUR18D

SunLEDIn Stock: 12671XSUR18D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The XSUR18D from SunLED qualifies as a substitute based on the following allowed parameter alignment:

Matching Parameters:

• Color: Red
• Lens Transparency: Diffused
• Lens Style: Rectangle with Flat Top
• Lens Size: 5.00mm x 2.00mm (identical)
• Mounting Type: Through Hole
• Package / Case: Radial
• RoHS Status: ROHS3 Compliant
• Current - Test: 10mA

Acceptable Variations Within Tolerance:

• Voltage - Forward (Vf): 1.9V (LTL-433P: 2.1V) — within typical LED forward voltage tolerance
• Wavelength - Dominant: 617nm (LTL-433P: 657nm) — both within red spectrum for indication applications
• Height (Max): 7.00mm (LTL-433P: 7.50mm) — compatible with through-hole mounting
• Viewing Angle: 110° (LTL-433P: 140°) — both provide adequate visibility for indication use

Parameter Comparison

Engineering Selection Recommendations

Both the LTL-433P and XSUR18D maintain Active product status and ROHS3 compliance. The LTL-433P offers higher forward voltage (2.1V) and wider viewing angle (140°), while the XSUR18D provides lower forward voltage (1.9V) and higher brightness rating (4mcd vs. 1.1mcd). Selection between these parts depends on circuit voltage requirements and brightness specifications for the intended indication application. Both parts share identical lens dimensions and mounting configuration, ensuring mechanical interchangeability in through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can XSUR18D replace LTL-433P in existing designs? A: Yes, provided the circuit accommodates the 1.9V forward voltage of the XSUR18D versus the 2.1V of the LTL-433P. Both parts are mechanically compatible with identical lens size (5.00mm x 2.00mm) and radial through-hole mounting.

Q: What is the primary difference in optical performance? A: The LTL-433P provides a 140° viewing angle compared to the XSUR18D at 110°. The XSUR18D offers higher brightness (4mcd vs. 1.1mcd). Wavelength differs slightly (657nm vs. 617nm), both within the red spectrum for indication use.

Q: Are both parts RoHS compliant? A: Yes, both LTL-433P and XSUR18D are ROHS3 compliant.

Q: What are the height differences? A: LTL-433P maximum height is 7.50mm; XSUR18D maximum height is 7.00mm. Both are compatible with standard through-hole PCB designs.

Q: Which part should be selected for low-voltage applications? A: The XSUR18D with 1.9V forward voltage is suitable for lower-voltage circuits. The LTL-433P at 2.1V forward voltage is appropriate for standard indication circuits.