TSUS4400 Equivalent & Substitute Parts

Part Overview

The TSUS4400 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 100mA forward current with 7mW/sr radiant intensity at rated current and a 36° viewing angle. The product is classified as obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

TSUS4400

Vishay Semiconductor Opto DivisionIn Stock: 1084TSUS4400 Datasheet

Current PartRFQ

INL-5AHIR30

InoluxIn Stock: 3003INL-5AHIR30 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TSUS4400 is determined by the following critical parameters:

• Wavelength compatibility: 940nm to 950nm range (near-infrared spectrum for standard IR applications)
• Current rating: 100mA maximum forward current
• Mounting configuration: Through-hole radial package
• Radiant intensity: Minimum 7mW/sr performance level
• Compliance: ROHS3 compliance and EAR99 classification maintained
• Temperature range: Operating within -40°C to 85°C envelope

The INL-5AHIR30 qualifies as a manufacturer-recommended substitute based on alignment with these core electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The INL-5AHIR30 is the manufacturer-recommended substitute for the obsolete TSUS4400. Both components maintain ROHS3 compliance and EAR99 classification, ensuring regulatory continuity.

Selection considerations based on provided specifications:

• Wavelength shift: The 10nm reduction from 950nm to 940nm remains within the near-infrared operating band for standard IR applications.
• Forward voltage variance: The 0.1V reduction (1.3V to 1.2V) requires verification against circuit design margins and current-limiting resistor calculations.
• Viewing angle reduction: The 6° narrower beam angle (36° to 30°) may impact optical coupling efficiency in wide-angle detection scenarios.
• Temperature range: The 5°C upper limit reduction (-40°C to 80°C versus -40°C to 85°C) must be evaluated for high-temperature operating environments.
• Product status: INL-5AHIR30 is active production, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the INL-5AHIR30 directly replace the TSUS4400 in existing designs?

A: Direct replacement is possible with circuit verification. The primary differences—wavelength (940nm vs 950nm), forward voltage (1.2V vs 1.3V), and viewing angle (30° vs 36°)—must be evaluated against application requirements. Optical coupling efficiency and current-limiting resistor values should be recalculated.

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

A: Both wavelengths operate in the near-infrared spectrum used for standard IR applications. The 10nm variance may affect detector sensitivity depending on the photodiode or receiver component specifications. Verify receiver wavelength response curves.

Q: Does the narrower viewing angle (30° vs 36°) affect compatibility?

A: The 6° reduction in viewing angle creates a more focused beam. Applications requiring wide-angle IR transmission may experience reduced optical coupling. Assess the spatial relationship between emitter and receiver in your circuit layout.

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

A: Both components are ROHS3 compliant and classified as EAR99. No compliance barriers exist for substitution from a regulatory standpoint.

Q: What is the impact of the 5°C upper temperature limit reduction?

A: The INL-5AHIR30 operates to 80°C maximum versus 85°C for the TSUS4400. Applications operating near or above 80°C require thermal analysis to confirm the substitute remains within safe operating margins.