Dialight 5552301 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Dialight 5552301 is a single green LED circuit board indicator designed for through-hole, right-angle mounting applications. This component features a 2.00mm diameter clear lens with domed top, rated for 2.4V at 20mA operation. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. Active alternatives are available from both the original manufacturer and compatible third-party suppliers.

Substiute Parts

5552301

DialightIn Stock: 7515552301 Datasheet

Current PartRFQ

5552301F

DialightIn Stock: 623135552301F Datasheet

DirectRFQ

AM2520EH/SGD

KingbrightIn Stock: 1102AM2520EH/SGD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Dialight 5552301 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Green (565nm wavelength)
• Configuration: Single LED
• Current Rating: 20mA
• Mounting Type: Through Hole, Right Angle
• Viewing Angle: 40°

Acceptable Variation Parameters:

• Lens Size: 1.80mm to 2.00mm diameter (minor dimensional variation acceptable for through-hole mounting)
• Voltage Rating: 2.2V to 2.4V (within standard LED forward voltage tolerance)
• Millicandela Rating: 1mcd to 12mcd (brightness variation acceptable depending on application requirements)
• Lens Type: Clear or Diffused (both provide adequate light transmission for indicator applications)
• RoHS Compliance: Substitutes may be RoHS3 compliant (improvement over original non-compliant status)

Two substitute parts meet these criteria: the Dialight 5552301F (direct manufacturer equivalent with improved compliance) and the Kingbright AM2520EH/SGD (compatible third-party alternative).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): The Dialight 5552301F is the primary substitute. This part maintains identical electrical specifications (20mA, 2.4V, 1mcd, 40° viewing angle) and mechanical compatibility (through-hole, right-angle mounting). The 5552301F is classified as active product status with ROHS3 compliance, providing improved regulatory standing compared to the obsolete, non-compliant original part. This substitute is suitable for direct board-level replacement without circuit modification.

For Alternative Sourcing: The Kingbright AM2520EH/SGD provides functional equivalence with noted parameter variations. This part maintains critical compatibility parameters: green color (565nm), 20mA current rating, 40° viewing angle, and through-hole right-angle mounting. Variations include reduced lens size (1.80mm vs. 2.00mm), lower voltage rating (2.2V vs. 2.4V), and increased brightness (12mcd vs. 1mcd). The diffused green lens type differs from the clear lens of the original. These variations are within acceptable tolerances for indicator applications but require verification that the increased brightness and diffused lens characteristics are compatible with the intended circuit design and user interface requirements.

Frequently Asked Questions (FAQ)

Q: Can the Dialight 5552301F be used as a direct drop-in replacement for the 5552301?

A: Yes. The 5552301F maintains identical electrical ratings (2.4V, 20mA, 1mcd) and mechanical configuration (through-hole, right-angle mounting). No circuit modifications are required. The primary advantage is active product status and ROHS3 compliance.

Q: What are the key differences between the 5552301 and the Kingbright AM2520EH/SGD?

A: The AM2520EH/SGD differs in three areas: lens size (1.80mm vs. 2.00mm), voltage rating (2.2V vs. 2.4V), and brightness (12mcd vs. 1mcd). The lens type is diffused green rather than clear. All other critical parameters (color, current, viewing angle, mounting type) are identical. These variations are within acceptable ranges for indicator applications but should be evaluated against specific circuit and user interface requirements.

Q: Is the smaller lens size of the AM2520EH/SGD compatible with the original PCB layout?

A: The 0.20mm diameter reduction (1.80mm vs. 2.00mm) is a minor dimensional variation. Through-hole mounting compatibility depends on the specific PCB hole diameter and mounting tolerance. Verify that the PCB hole diameter accommodates the 1.80mm lens diameter before implementation.

Q: What is the impact of the voltage rating difference (2.2V vs. 2.4V) in the Kingbright substitute?

A: The 0.2V difference falls within standard LED forward voltage tolerance. If the circuit is designed for 2.4V operation, the 2.2V-rated Kingbright part will operate at slightly higher brightness due to increased forward current. Verify that the circuit current-limiting resistor accommodates this variation without exceeding the 20mA maximum rating.

Q: Why is the Kingbright AM2520EH/SGD brighter (12mcd vs. 1mcd)?

A: Brightness difference results from different LED die and lens design. The diffused green lens of the AM2520EH/SGD distributes light over a wider area, while the clear lens of the original concentrates light. The increased millicandela rating reflects the die efficiency rather than perceived brightness in the application. Evaluate whether the increased brightness is compatible with the intended user interface design.

Q: Are there any compliance or certification differences between these parts?

A: The Dialight 5552301F is ROHS3 compliant, while the original 5552301 is non-compliant. The Kingbright AM2520EH/SGD compliance status is not specified in available data. If RoHS compliance is a regulatory requirement, the 5552301F is the recommended choice.