TSUS5400-AS12 Equivalent & Substitute Parts

Part Overview

The TSUS5400-AS12 is an Infrared (IR) Emitter manufactured by Vishay Semiconductor Opto Division, designed for applications requiring 950nm wavelength emission at 150mA maximum forward current. This component features a radial, 5mm diameter package (T 1 3/4) with a 44° viewing angle and operates across the temperature range of -40°C to 85°C. The part is classified as Obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

TSUS5400-AS12

Vishay Semiconductor Opto DivisionIn Stock: 926TSUS5400-AS12 Datasheet

Current PartRFQ

LTE-3371T

Lite-On Inc.In Stock: 20131LTE-3371T Datasheet

SimilarRFQ

LTE-3371T

Lite-On Inc.In Stock: 20131LTE-3371T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSUS5400-AS12 is determined by alignment of the following critical parameters:

Wavelength Compatibility: The primary substitute must operate within the near-infrared spectrum. The TSUS5400-AS12 operates at 950nm; substitute components operating at 940nm fall within acceptable tolerance for most IR detection and transmission applications utilizing standard photodiode receivers.

Current Rating: The TSUS5400-AS12 supports a maximum forward current of 150mA. Substitute components with lower maximum current ratings (100mA) remain compatible when circuit design accommodates reduced current operation.

Forward Voltage: The TSUS5400-AS12 exhibits a typical forward voltage of 1.3V. Substitute components with forward voltages of 1.25V operate within acceptable circuit design parameters for standard IR emitter applications.

Viewing Angle: The TSUS5400-AS12 provides a 44° viewing angle. Substitute components with 40° viewing angles represent a minor reduction in beam divergence, acceptable for applications not requiring maximum angular coverage.

Package and Mounting: Both the main part and substitutes utilize Through Hole mounting with radial package configurations, ensuring mechanical and electrical compatibility in existing PCB layouts.

Operating Temperature Range: The TSUS5400-AS12 operates from -40°C to 85°C. Substitute components maintaining this identical temperature range ensure thermal compatibility across all specified operating conditions.

Compliance and Status: The TSUS5400-AS12 is ROHS3 Compliant and Obsolete. Active substitute components with ROHS3 Compliance ensure regulatory alignment and ongoing availability.

Parameter Comparison

Engineering Selection Recommendations

The LTE-3371T from Lite-On Inc. serves as the primary equivalent substitute for the obsolete TSUS5400-AS12. This substitution is supported by the following engineering factors:

Product Status Alignment: The LTE-3371T maintains Active product status, ensuring continued availability and supply chain reliability. The TSUS5400-AS12 Obsolete classification necessitates transition to an actively manufactured component.

Regulatory Compliance: Both components maintain ROHS3 Compliance certification, satisfying environmental and regulatory requirements across all applicable markets and applications.

Electrical Parameter Compatibility: The LTE-3371T operates within acceptable electrical parameters relative to the TSUS5400-AS12. The 10mA reduction in maximum forward current (100mA versus 150mA) and 0.05V reduction in forward voltage (1.25V versus 1.3V) remain within standard circuit design tolerances for IR emitter applications.

Wavelength Proximity: The 10nm wavelength difference (940nm versus 950nm) falls within the operational bandwidth of standard IR photodiode receivers and does not introduce incompatibility in detection circuits.

Thermal Compatibility: Identical operating temperature ranges (-40°C to 85°C) ensure thermal performance equivalence across all specified environmental conditions.

Mechanical Compatibility: Both components utilize Through Hole mounting with radial package configurations, enabling direct substitution in existing PCB layouts without redesign.

Frequently Asked Questions (FAQ)

Q: Can the LTE-3371T directly replace the TSUS5400-AS12 in existing circuit designs?

A: The LTE-3371T is mechanically and electrically compatible with the TSUS5400-AS12 for most applications. Circuit designs must accommodate the reduced maximum forward current rating (100mA versus 150mA). If the original design operates the TSUS5400-AS12 above 100mA, circuit modification is required.

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

A: Both wavelengths operate within the near-infrared spectrum and are compatible with standard IR photodiode receivers. The 10nm difference does not introduce incompatibility in detection circuits. Applications requiring precise wavelength matching should evaluate receiver spectral response characteristics.

Q: Are there differences in radiant intensity between the two components?

A: The TSUS5400-AS12 provides 7mW/sr @ 100mA, while the LTE-3371T provides 6.77mW/sr @ 20mA. These measurements are taken at different forward currents, making direct comparison imprecise. Circuit designs should evaluate actual radiant intensity requirements at the operating current selected for the LTE-3371T.

Q: Does the 4° reduction in viewing angle (44° to 40°) affect application compatibility?

A: The 4° reduction in viewing angle represents a minor decrease in beam divergence. Applications requiring maximum angular coverage should evaluate whether the 40° angle of the LTE-3371T meets specific optical requirements. Most standard IR transmission and detection applications accommodate this difference.

Q: What is the impact of the forward voltage difference (1.3V to 1.25V)?

A: The 0.05V reduction in forward voltage is negligible for most circuit designs. This difference may result in slightly reduced power dissipation and improved efficiency. Circuit designs should verify that the reduced voltage does not impact current-limiting resistor calculations or power supply margin requirements.

Q: Are both components suitable for the same operating temperature range?

A: Yes. Both the TSUS5400-AS12 and LTE-3371T operate across the identical temperature range of -40°C to 85°C, ensuring thermal compatibility across all specified environmental conditions.

Q: What packaging considerations apply to this substitution?

A: Both components utilize Through Hole mounting with radial package configurations. The TSUS5400-AS12 specifies a 5mm diameter package (T 1 3/4), while the LTE-3371T specifies a Radial package. Both are compatible with standard 5mm radial component footprints on PCBs.

Q: Are there compliance differences between the two components?

A: Both components maintain ROHS3 Compliance certification. No compliance differences exist between the TSUS5400-AS12 and LTE-3371T. The LTE-3371T additionally specifies Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating superior moisture handling characteristics.