Dialight 5219901 LED White Clear T-1 T/H - Equivalent & Substitute Parts

Part Overview

The Dialight 5219901 is a white LED indication component designed for through-hole mounting applications. It features a 3mm radial package with a clear, domed lens and operates at 3.6V forward voltage with a 20mA test current. The component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The 5219901F serves as the direct manufacturer substitute, offering improved performance characteristics while maintaining mechanical and electrical compatibility within the specified parameter range.

Substiute Parts

5219901

DialightIn Stock: 9325219901 Datasheet

Current PartRFQ

5219901F

DialightIn Stock: 14975219901F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Dialight 5219901F qualifies as a direct substitute based on the following alignment of critical parameters:

• Mounting Type: Both components use through-hole radial mounting, ensuring identical PCB integration
• Lens Size: Both maintain 3.00mm to 3.00mm diameter specification, confirming mechanical fit
• Maximum Height: Both components are constrained to 6.35mm maximum height, preserving assembly clearance
• Color & Lens Transparency: Both deliver white light output through clear lenses, maintaining optical function
• Current Rating: Both operate at 20mA test current, confirming electrical compatibility
• Package Configuration: Both use radial lead configuration, ensuring lead spacing and orientation compatibility

The 5219901F represents an active product with enhanced millicandela rating (1925mcd versus 1010mcd) and improved RoHS3 compliance status, while maintaining full backward compatibility with the obsolete 5219901.

Parameter Comparison

Engineering Selection Recommendations

The Dialight 5219901F is the appropriate substitute for the obsolete 5219901 based on the following engineering criteria:

• Product Status Alignment: The 5219901F is an active product with current manufacturing support, eliminating supply chain risk associated with the obsolete 5219901
• Regulatory Compliance: The 5219901F achieves ROHS3 compliance, providing superior environmental and regulatory positioning compared to the non-compliant 5219901
• Mechanical Compatibility: Identical mounting type, package configuration, and maximum height ensure direct PCB integration without redesign
• Electrical Compatibility: Matching 20mA test current and radial lead configuration confirm circuit-level compatibility
• Performance Enhancement: The 5219901F delivers 1925mcd brightness versus 1010mcd, providing improved optical output within the same physical and electrical envelope

Selection of the 5219901F eliminates obsolescence risk while maintaining full backward compatibility and delivering enhanced performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 5219901F be used as a direct replacement for the 5219901 without PCB modifications?

A: Yes. Both components share identical mounting type (through-hole radial), package configuration, maximum height (6.35mm), and lead spacing. PCB footprints designed for the 5219901 accommodate the 5219901F without modification.

Q: What is the significance of the lens size difference (2.92mm versus 3.00mm)?

A: The 0.08mm difference falls within standard manufacturing tolerance for LED lens diameters and does not affect mechanical fit or optical performance in standard through-hole applications. Both components use identical domed lens styling and clear transparency.

Q: Does the increased millicandela rating (1925mcd versus 1010mcd) affect circuit design?

A: No. Both components operate at identical 20mA test current and 3.6V forward voltage. The brightness increase results from improved LED die efficiency in the 5219901F and does not require circuit modifications. Existing current-limiting resistor values remain valid.

Q: Is the 5219901F suitable for applications requiring RoHS compliance?

A: Yes. The 5219901F achieves ROHS3 compliance, making it appropriate for applications with RoHS requirements. The original 5219901 is RoHS non-compliant and should not be used in RoHS-regulated applications.

Q: Are there any voltage or current rating differences between the two components?

A: The 5219901 specifies 3.6V forward voltage (typical) with 20mA test current. The 5219901F does not list forward voltage in the provided specifications but maintains the identical 20mA test current. Both components are designed for the same electrical operating point.

Q: What is the inventory status for each component?

A: The 5219901 has 850 pieces in stock (new original). The 5219901F has 1422 pieces in stock (new original, bulk packaging). The 5219901F offers superior supply availability as an active product.