TSUS5402 Equivalent & Substitute Parts

Part Overview

The TSUS5402 is an infrared (IR) emitter operating at 950nm wavelength, designed for through-hole radial mounting applications. Manufactured by Vishay Semiconductor Opto Division, this component delivers 15mW/sr radiant intensity at 100mA forward current with a 44° viewing angle. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

TSUS5402

Vishay Semiconductor Opto DivisionIn Stock: 64163TSUS5402 Datasheet

Current PartRFQ

WP7113F3C

KingbrightIn Stock: 1719WP7113F3C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSUS5402 is determined by the following critical parameters:

• Mounting Type & Package: Through-hole radial configuration required for PCB compatibility
• Wavelength Range: IR emitters operating in the 940nm–950nm band maintain functional equivalence for most infrared detection systems
• Radiant Intensity: Minimum 15mW/sr output ensures adequate signal strength for receiver circuits
• Operating Temperature Range: -40°C to 85°C compatibility maintains thermal performance across applications
• RoHS3 Compliance: Environmental and regulatory alignment with modern manufacturing standards
• Forward Current Capability: Maximum current rating must support system drive requirements

The WP7113F3C from Kingbright meets these substitution criteria while maintaining radial through-hole mounting and equivalent radiant intensity specifications.

Parameter Comparison

Engineering Selection Recommendations

The WP7113F3C qualifies as a functional substitute for the obsolete TSUS5402 based on the following factors:

Product Status: The WP7113F3C maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete TSUS5402.

Compliance Alignment: Both components are ROHS3 compliant with identical MSL ratings (1 - Unlimited), maintaining regulatory and environmental compatibility.

Optical Performance: Both emitters deliver 15mW/sr radiant intensity, meeting minimum output requirements for infrared detection circuits. The 10nm wavelength difference (950nm vs. 940nm) falls within the standard tolerance band for IR receiver sensitivity.

Thermal Compatibility: Identical operating temperature ranges (-40°C to 85°C) ensure equivalent thermal performance across application environments.

Circuit Integration Considerations: The WP7113F3C operates at lower forward voltage (1.2V vs. 2.2V) and reduced maximum current (50mA vs. 150mA). Circuit designs must verify that drive electronics can accommodate these parameter differences. The narrower viewing angle (20° vs. 44°) may require optical design adjustments in applications requiring wide-angle emission.

Frequently Asked Questions (FAQ)

Q: Can the WP7113F3C directly replace the TSUS5402 without circuit modifications?

A: Direct pin-compatible replacement is possible due to identical radial through-hole mounting. However, circuit validation is required because the WP7113F3C operates at lower forward voltage (1.2V vs. 2.2V) and maximum current (50mA vs. 150mA). Drive electronics must be verified to function within these parameters.

Q: What is the significance of the 10nm wavelength difference between 950nm and 940nm?

A: Both wavelengths operate within the standard infrared detection band. Most IR receiver circuits are designed with sufficient spectral sensitivity to accept both 940nm and 950nm emitters. System-level testing is recommended for applications with narrow receiver bandwidth specifications.

Q: How does the viewing angle difference affect system performance?

A: The TSUS5402 provides a 44° viewing angle compared to the WP7113F3C at 20°. Applications requiring wide-angle emission coverage may need optical redesign or multiple emitters when substituting with the narrower-angle WP7113F3C.

Q: Are both components suitable for new designs?

A: The TSUS5402 is obsolete and unsuitable for new designs. The WP7113F3C, with active production status, is the appropriate choice for new implementations requiring equivalent IR emitter functionality.

Q: Do both components meet current environmental and regulatory standards?

A: Yes. Both the TSUS5402 and WP7113F3C are ROHS3 compliant with MSL rating 1 (Unlimited), meeting modern manufacturing and environmental requirements.