WP57IID Equivalent & Substitute Parts Reference

Part Overview

The WP57IID is an active production red LED indicator manufactured by Kingbright, designed for through-hole mounting applications. This T-1 3/4 (5mm) diffused lens LED operates at 2V forward voltage with a 12mcd brightness rating and 617nm dominant wavelength. The component is ROHS3 compliant and carries 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 regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

WP57IID

KingbrightIn Stock: 1865WP57IID Datasheet

Current PartRFQ

4304H1

Visual Communications Company - VCCIn Stock: 88484304H1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WP57IID are identified based on strict alignment of the following critical parameters:

Mandatory Matching Criteria:

• Lens size and package type: T-1 3/4 (5mm) radial through-hole configuration
• Color classification: Red LED
• Forward voltage: 2V nominal operation
• Lens style: Round with domed top, diffused transparency
• Mounting method: Through-hole radial
• Regulatory status: ROHS3 compliant, REACH unaffected

Allowable Variation Parameters:

• Brightness rating (millicandela): Substitutes with lower mcd ratings are acceptable when application requirements permit reduced brightness
• Viewing angle: Variation acceptable based on application field-of-view requirements
• Peak wavelength: Minor wavelength shifts within red spectrum acceptable for general indication applications
• Test current: Variation acceptable provided forward voltage remains 2V at specified test conditions

The substitute part 4304H1 (Visual Communications Company - VCC) meets all mandatory matching criteria and maintains full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

WP57IID Selection Criteria:

• Applications requiring 12mcd brightness output
• Designs with 60° viewing angle specification
• PCB layouts with 8.60mm maximum height clearance
• Kingbright supply chain preference or existing qualification

4304H1 Selection Criteria:

• Applications tolerating 10mcd brightness (83% of WP57IID)
• Designs with 40° viewing angle requirement or narrower field-of-view acceptable
• PCB layouts with 9.98mm maximum height clearance available
• VCC supply chain preference or cost optimization objectives
• Applications where reduced brightness is functionally adequate

Regulatory and Compliance Equivalence: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 export classification. No additional compliance verification is required for direct substitution in existing designs.

Circuit Design Compatibility: Both parts operate at 2V forward voltage. Existing current-limiting resistor calculations remain valid. No circuit redesign is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can 4304H1 be used as a direct drop-in replacement for WP57IID?

A: Yes, for applications where the 10mcd brightness of 4304H1 meets functional requirements. The 2V forward voltage, T-1 3/4 package, and radial through-hole mounting are identical. Verify that the 1.38mm height difference (9.98mm vs 8.60mm) does not exceed PCB clearance constraints.

Q: What is the brightness difference between these parts?

A: WP57IID provides 12mcd while 4304H1 provides 10mcd. This represents an 83% brightness ratio. For general indication applications, this difference is often imperceptible to the human eye. Applications with specific brightness requirements should retain the WP57IID.

Q: Are the viewing angles interchangeable?

A: No. WP57IID has a 60° viewing angle while 4304H1 has a 40° viewing angle. The 4304H1 produces a narrower light cone. Select based on application requirements for light distribution across the intended viewing area.

Q: Do I need to change my circuit design to use 4304H1 instead of WP57IID?

A: No. Both parts operate at 2V forward voltage. Current-limiting resistor values calculated for WP57IID remain valid for 4304H1. No circuit modifications are required.

Q: What is the height difference and does it matter?

A: WP57IID maximum height is 8.60mm; 4304H1 is 9.98mm. The 1.38mm difference may be significant in space-constrained designs. Verify clearance above the LED on your PCB before substitution.

Q: Are both parts ROHS3 compliant?

A: Yes. Both WP57IID and 4304H1 are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). No compliance risk exists for substitution.

Q: What is the wavelength difference?

A: WP57IID has a 627nm peak wavelength; 4304H1 has 630nm. Both are within the red spectrum. This 3nm difference is not visually distinguishable for general indication applications.

Q: Can I use 4304H1 in high-brightness applications?

A: No. If your application requires 12mcd brightness, use WP57IID. The 4304H1 at 10mcd may be insufficient for applications demanding high visibility or long-distance indication.