Dialight 5520211 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5520211 is a dual-level red LED circuit board indicator featuring a 5mm diffused, tinted lens with right-angle through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates at 2.2V with 10mA current consumption and delivers 7mcd brightness at a 50° viewing angle. Identifying compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

5520211

DialightIn Stock: 10075520211 Datasheet

Current PartRFQ

5520211F

DialightIn Stock: 17225520211F Datasheet

DirectRFQ

H278CRD

Bivar Inc.In Stock: 811H278CRD Datasheet

SimilarRFQ

WP73EB/2IDA

KingbrightIn Stock: 871WP73EB/2IDA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5520211 is determined by the following critical parameters:

Primary Substitution Criteria:

• Configuration: 2 High (dual-level) red LED
• Lens size: 5mm form factor (T-1 3/4 or equivalent)
• Mounting type: Through-hole, right-angle orientation
• Lens type: Diffused appearance
• Color: Red spectrum (650nm nominal)

Allowable Parameter Variations:

• Voltage rating: ±0.2V tolerance (2.0V to 2.4V acceptable)
• Current consumption: Up to 30mA (design-dependent)
• Millicandela rating: 2mcd to 40mcd (application-dependent brightness)
• Viewing angle: 45° to 60° (acceptable for general indication)
• Wavelength peak: 627nm to 700nm (red spectrum range)

Substitute Parts Identified:

1. 5520211F (Dialight) - Direct manufacturer equivalent, active status
2. H278CRD (Bivar Inc.) - Similar configuration, different electrical characteristics
3. WP73EB/2IDA (Kingbright) - Similar configuration, different lens diameter and electrical characteristics

Parameter Comparison

Engineering Selection Recommendations

5520211F (Dialight) - Recommended Primary Substitute

The 5520211F is the direct manufacturer equivalent with identical electrical and optical specifications. This part maintains active product status and carries ROHS3 compliance certification. Selection of this substitute eliminates all performance variables and ensures drop-in compatibility. Packaging is supplied in bulk format.

H278CRD (Bivar Inc.) - Secondary Substitute

The H278CRD maintains the dual-level red LED configuration with 5mm T-1 3/4 form factor and right-angle mounting. This part operates at 2.1V (within tolerance) but draws 20mA current and delivers 2mcd brightness. The 700nm wavelength peak and 45° viewing angle represent acceptable variations within the red spectrum. ROHS3 compliance is confirmed. Selection requires circuit design verification for current consumption compatibility.

WP73EB/2IDA (Kingbright) - Tertiary Substitute

The WP73EB/2IDA provides dual-level red LED functionality with right-angle through-hole mounting. The 4.80mm lens diameter represents a minor mechanical variation from the 5mm standard. Operating parameters include 2V voltage rating, 30mA current consumption, and 40mcd brightness output. The 627nm wavelength and 60° viewing angle fall within acceptable red spectrum parameters. ROHS3 compliance and REACH Unaffected status are confirmed. Selection requires mechanical fit verification and circuit design review for higher current consumption.

Frequently Asked Questions (FAQ)

Q: Can the 5520211F be used as a direct replacement for the obsolete 5520211?

A: Yes. The 5520211F is the direct manufacturer equivalent with identical specifications across all electrical and optical parameters. It maintains the same 2.2V voltage rating, 10mA current consumption, 7mcd brightness, and 50° viewing angle. The primary difference is active product status and ROHS3 compliance certification.

Q: What are the key differences between the H278CRD and the original 5520211?

A: The H278CRD maintains the dual-level red LED configuration and 5mm form factor but operates at 2.1V (0.1V lower) and draws 20mA (double the current). Brightness output is significantly lower at 2mcd versus 7mcd. The viewing angle is reduced to 45°. These variations require circuit design evaluation for compatibility.

Q: Is the WP73EB/2IDA mechanically compatible with the 5520211?

A: The WP73EB/2IDA has a 4.80mm lens diameter compared to the 5mm standard of the original part. While the T-1 3/4 form factor and right-angle mounting are maintained, the slightly smaller lens diameter may affect mechanical fit in existing PCB layouts. Physical verification is necessary before selection.

Q: What compliance certifications apply to these substitute parts?

A: All three substitute parts carry ROHS3 compliance certification. The 5520211F and WP73EB/2IDA maintain REACH Unaffected status. Compliance documentation should be obtained from manufacturers for specific regulatory requirements.

Q: Can these parts be used interchangeably in the same circuit?

A: The 5520211F is fully interchangeable. The H278CRD and WP73EB/2IDA require circuit design review due to different voltage ratings, current consumption, and brightness outputs. Existing current-limiting resistor values and brightness expectations may require adjustment.

Q: What packaging formats are available for these substitute parts?

A: The 5520211F is supplied in bulk packaging. The H278CRD is supplied in tray format. The WP73EB/2IDA packaging format is not specified. Confirm packaging requirements with suppliers for production and assembly compatibility.