Dialight 5218069F LED GRN/YLW DIFFUSED 1.8MM T/H Equivalent & Substitute Parts

Part Overview

The Dialight 5218069F is a through-hole mounted dual-color LED indicator featuring green and yellow light emission in a 1.8mm diffused lens package. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. The part operates at 2.1V forward voltage for green and 2V for yellow, with a 20mA test current and 40° viewing angle. Substitutes must maintain compatibility with the radial lead through-hole mounting configuration and preserve the dual-color indication capability.

Substiute Parts

5218069F

DialightIn Stock: 11195218069F Datasheet

Current PartRFQ

1.8BC-Y/G

Bivar Inc.In Stock: 7251.8BC-Y/G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Dialight 5218069F must satisfy the following core electrical and mechanical criteria:

• Color Configuration: Dual-color green and yellow LED indication
• Forward Voltage Compatibility: 2.1V green and 2V yellow operation
• Test Current: 20mA for both colors
• Mounting Architecture: Through-hole radial lead configuration
• Lens Package: Diffused lens with round domed top geometry
• Physical Compatibility: Similar or smaller maximum height to ensure PCB layout compatibility

The Bivar Inc. 1.8BC-Y/G meets these substitution criteria while maintaining electrical equivalence and mechanical interchangeability within standard through-hole PCB designs.

Parameter Comparison

Engineering Selection Recommendations

The Bivar Inc. 1.8BC-Y/G is the qualified substitute for the obsolete Dialight 5218069F based on the following factors:

• Electrical Equivalence: Identical forward voltage and test current specifications for both green and yellow emitters ensure direct circuit compatibility without redesign.
• Mechanical Interchangeability: Both components use radial lead through-hole mounting with diffused round domed lenses, permitting direct PCB footprint substitution.
• Production Status: The Bivar part is active and in current production, ensuring long-term supply availability and manufacturing consistency.
• Compliance Alignment: Both parts maintain MSL 1 (Unlimited) moisture sensitivity and EAR99 export classification, preserving regulatory compliance in existing designs.
• Physical Advantage: The Bivar substitute features a reduced maximum height (3.00mm vs. 4.88mm) and wider viewing angle (50° vs. 40°), providing improved PCB layout flexibility and enhanced visibility characteristics.

Frequently Asked Questions (FAQ)

Q: Can the Bivar 1.8BC-Y/G be used as a direct replacement for the Dialight 5218069F without circuit modifications?

A: Yes. Both parts operate at identical forward voltages (2.1V green, 2V yellow) and test currents (20mA), requiring no changes to current-limiting resistor values or power supply specifications.

Q: What are the key differences between these two parts?

A: The primary differences are product status (Dialight obsolete vs. Bivar active), physical height (4.88mm vs. 3.00mm), viewing angle (40° vs. 50°), and millicandela ratings. The Bivar part offers improved visibility and reduced PCB height, though with lower brightness intensity.

Q: Are there any lens size differences that affect optical performance?

A: The Dialight features a 1.80mm lens diameter while the Bivar is 1.70mm. This minor difference does not affect electrical compatibility or standard through-hole PCB mounting, though it may produce slightly different optical diffusion characteristics.

Q: Does the Bivar substitute maintain the same moisture sensitivity rating?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.

Q: Can the Bivar part be used in applications requiring the original 40° viewing angle specification?

A: The Bivar part provides a 50° viewing angle, which exceeds the original 40° specification. This wider angle is suitable for applications requiring the original viewing angle and provides additional visibility margin in most installation scenarios.