WP503HDT Equivalent & Substitute Parts Reference

Part Overview

The WP503HDT is an active red diffused LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This component is a discrete 635nm red LED with a square lens form factor and radial package configuration. The part is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and consumer electronics applications.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications are maintained across the product family. The WP503 series provides alternative configurations to support design flexibility and supply chain continuity.

Substiute Parts

WP503HDT

KingbrightIn Stock: 1060WP503HDT Datasheet

Current PartRFQ

WP503IDT

KingbrightIn Stock: 2028WP503IDT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts within the WP503 series maintain compatibility based on the following criteria:

Mechanical Compatibility Parameters:

• Lens size: 5.00mm (fixed across series)
• Lens style: Square with flat top (fixed across series)
• Mounting type: Through hole radial package (fixed across series)
• Physical dimensions: 5.00mm L × 6.00mm W × 7.20mm H maximum (fixed across series)

Electrical Compatibility Parameters:

• Forward voltage range: 2.0V to 2.25V (acceptable variation for indicator applications)
• Test current: 20mA (standardized across series)
• Viewing angle: 110° (fixed across series)
• Color family: Red spectrum (617nm to 635nm dominant wavelength)

Compliance Parameters:

• RoHS3 compliance (maintained across all parts)
• Moisture sensitivity level MSL 1 (maintained across all parts)
• REACH unaffected status (maintained across all parts)

Substitution is valid when the receiving circuit design accommodates the specified forward voltage and millicandela rating of the alternative part.

Parameter Comparison

Engineering Selection Recommendations

WP503HDT Selection Criteria:

• Use when forward voltage specification requires 2.25V nominal operation
• Use when luminous intensity of 0.8mcd meets application brightness requirements
• Use when 635nm dominant wavelength is specified for color matching or optical filtering
• Both RoHS3 compliance and MSL 1 rating support standard manufacturing and storage conditions

WP503IDT Selection Criteria:

• Use when forward voltage of 2.0V is compatible with circuit design
• Use when higher luminous intensity (2mcd) is required for improved visibility
• Use when 617nm dominant wavelength is acceptable for red indication
• Both RoHS3 compliance and MSL 1 rating support standard manufacturing and storage conditions

Compliance Assurance: Both parts maintain identical RoHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating. Selection between these parts is determined by electrical performance requirements (forward voltage and brightness) and wavelength specification, not by regulatory or environmental considerations.

Frequently Asked Questions (FAQ)

Q: Can WP503IDT directly replace WP503HDT in existing designs?

A: Direct replacement is possible if the circuit design accommodates the 2.0V forward voltage (versus 2.25V) and the higher 2mcd luminous intensity. The mechanical form factor, mounting type, and compliance certifications are identical. Verify that the current-limiting resistor value remains appropriate for the lower forward voltage.

Q: What is the wavelength difference between WP503HDT and WP503IDT?

A: WP503HDT operates at 635nm dominant wavelength, while WP503IDT operates at 617nm. Both are within the red spectrum. The 18nm difference may be perceptible in direct side-by-side comparison but both are classified as red indicators. Select based on specific color matching requirements.

Q: Are both parts suitable for high-temperature or moisture-sensitive applications?

A: Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture control is required during storage or handling. Thermal performance specifications are not provided in the available parameters; consult detailed datasheets for temperature operating range requirements.

Q: What is the inventory status for these parts?

A: WP503HDT has 987 pieces in stock. WP503IDT has 1925 pieces in stock. Both are actively manufactured and available for immediate procurement.

Q: Are there any packaging differences between WP503HDT and WP503IDT?

A: WP503HDT is supplied in standard packaging. WP503IDT is supplied in bulk packaging. Both use identical radial through-hole package configuration. Verify bulk packaging specifications with supplier if reel or tape format is required for automated assembly.

Q: Which part should be selected for new designs?

A: Selection depends on circuit requirements. If the design specifies 2.25V forward voltage and 0.8mcd brightness, use WP503HDT. If 2.0V forward voltage and 2mcd brightness are acceptable, WP503IDT offers higher luminous intensity and greater inventory availability. Both parts are active products with full compliance certifications.