LED YELLOW DIFFUSED T-1 3/4 T/H 4301H7/7 Equivalent & Substitute Parts

Part Overview

The VCC 4301H7/7 is a yellow diffused LED indicator in T-1 3/4 through-hole package, designed for discrete 2.1V radial applications. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and production continuity. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for standard industrial and commercial applications.

Substiute Parts

4301H7/7

Visual Communications Company - VCCIn Stock: 9824301H7/7 Datasheet

Current PartRFQ

5219248F

DialightIn Stock: 22745219248F Datasheet

SimilarRFQ

5219284F

DialightIn Stock: 10005219284F Datasheet

SimilarRFQ

5219704F

DialightIn Stock: 13595219704F Datasheet

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WP57YYD

KingbrightIn Stock: 1153WP57YYD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 4301H7/7 are identified based on strict parameter alignment within the yellow LED indicator category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Color: Yellow
• Lens Transparency: Diffused
• Mounting Type: Through Hole
• Package Type: Radial T-1 3/4
• Voltage - Forward (Vf): 2.1V nominal
• Wavelength - Peak: 590nm range

Primary Substitute Group (Full Compatibility): Parts meeting all critical parameters with active product status and equivalent electrical characteristics:

• 5219248F (Dialight 521 Series): Yellow diffused, 2.1V, T-1 3/4, through-hole radial
• WP57YYD (Kingbright): Yellow diffused, 2.1V, T-1 3/4, through-hole radial

Secondary Substitute Group (Parameter Variance): Parts with compatible core function but parameter deviations:

• 5219284F (Dialight 521 Series): Yellow diffused, through-hole, but 10V forward voltage and 5mm package variant
• 5219704F (Dialight 521 Series): Orange color variant, 1.9V forward voltage, 5mm package

The primary substitute group maintains electrical and mechanical compatibility for direct replacement. Secondary substitutes require circuit design evaluation due to voltage and package differences.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Substitutes):

The 5219248F (Dialight 521 Series) and WP57YYD (Kingbright) are the preferred substitutes for the obsolete 4301H7/7. Both parts maintain active product status, ROHS3 compliance, and identical forward voltage (2.1V) and mounting configuration. The 5219248F offers higher brightness (29mcd vs. 20mcd) with slightly reduced viewing angle (50° vs. 60°), while the WP57YYD provides equivalent brightness (12mcd) and identical viewing angle (60°). Both are available in production quantities and carry unlimited moisture sensitivity rating.

For Circuit Design Flexibility:

The 5219284F (Dialight 521 Series) is suitable only when circuit design accommodates 10V forward voltage operation, representing a significant departure from the original 2.1V specification. This part is not recommended for direct pin-compatible replacement without circuit modification.

Color Variant Consideration:

The 5219704F (Dialight 521 Series) provides orange indication with 1.9V forward voltage. This part is applicable only when color change from yellow to orange is functionally acceptable and circuit design supports the lower forward voltage.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, matching the original part's environmental specifications. Active product status ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 5219248F directly replace the 4301H7/7 in existing PCB designs?

A: Yes. The 5219248F maintains identical forward voltage (2.1V), through-hole radial package, and T-1 3/4 form factor. Physical height difference (9.66mm vs. 8.61mm) requires verification against PCB clearance specifications. The reduced viewing angle (50° vs. 60°) may affect optical performance in wide-angle applications.

Q: What is the primary difference between the 5219248F and WP57YYD substitutes?

A: Both parts are electrically equivalent with 2.1V forward voltage and identical package type. The 5219248F offers higher brightness (29mcd vs. 12mcd) and slightly reduced viewing angle (50° vs. 60°). The WP57YYD provides equivalent viewing angle (60°) to the original part. Selection depends on brightness requirements and optical distribution needs.

Q: Why is the 5219284F listed as a substitute if it has 10V forward voltage?

A: The 5219284F is listed as a functional substitute within the yellow diffused LED category but requires circuit redesign. The 10V forward voltage represents a fundamental electrical difference unsuitable for direct replacement in 2.1V circuits. This part is applicable only in new designs or circuits modified to accommodate higher voltage operation.

Q: Is the 5219704F (orange) suitable for applications requiring yellow indication?

A: No. The 5219704F provides orange color output (600nm peak wavelength) rather than yellow (590nm). This part is listed as a functional variant but is not suitable for applications requiring yellow indication. Color substitution is acceptable only when application requirements permit orange indication.

Q: What are the compliance considerations for substitute part selection?

A: All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the original 4301H7/7 specifications. All parts carry EAR99 ECCN classification and HTSUS code 8541.41.0000, ensuring regulatory equivalence for procurement and export purposes.

Q: How do brightness differences affect circuit design?

A: The 5219248F (29mcd) provides higher brightness than the original 4301H7/7 (20mcd), potentially requiring current limiting resistor adjustment to maintain consistent indicator intensity. The WP57YYD (12mcd) provides lower brightness, which may necessitate circuit evaluation for visibility requirements. Current-test specifications (10mA for Dialight parts vs. 20mA for original) indicate different operating points.

Q: Are there mechanical compatibility concerns with substitute parts?

A: Physical height variations exist: 5219248F (9.66mm), 5219284F (9.95mm), 5219704F (9.57mm), and WP57YYD (8.60mm) compared to the original 8.61mm. PCB clearance, enclosure fit, and panel mounting specifications must be verified. Lens diameter consistency (approximately 5mm) maintains standard through-hole compatibility.