TSUS5201 Infrared Emitter 950nm Equivalent & Substitute Parts

Part Overview

The TSUS5201 is a radial infrared (IR) emitter operating at 950nm wavelength, rated for 150mA maximum forward current with 2.2V typical forward voltage. Manufactured by Vishay Semiconductor Opto Division, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary for new designs and ongoing production requirements. Substitute components must maintain compatibility across electrical characteristics, mechanical form factor, and thermal operating range.

Substiute Parts

TSUS5201

Vishay Semiconductor Opto DivisionIn Stock: 1003TSUS5201 Datasheet

Current PartRFQ

BIR-BM53E4G-1

American Bright Optoelectronics CorporationIn Stock: 17066BIR-BM53E4G-1 Datasheet

MFR RecommendedRFQ

SIR-563ST3FN

Rohm SemiconductorIn Stock: 2941SIR-563ST3FN Datasheet

MFR RecommendedRFQ

SIR-568ST3F

Rohm SemiconductorIn Stock: 1442SIR-568ST3F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TSUS5201 is determined by the following criteria:

Primary Compatibility Parameters:

• Infrared emitter type (IR LED)
• Wavelength range: 940nm–950nm acceptable (near-infrared spectrum compatibility)
• Maximum forward current: minimum 100mA (TSUS5201 rated 150mA; substitutes rated 100mA are acceptable for applications not requiring full current capacity)
• Forward voltage: 1.25V–2.2V range (acceptable variance for IR emitter applications)
• Viewing angle: 25°–30° (acceptable for directional IR transmission)
• Operating temperature: minimum -40°C to 85°C (TSUS5201 range)
• Mounting type: Through Hole (mechanical compatibility)
• RoHS3 compliance (regulatory requirement)

Secondary Consideration:

• Package form factor: Radial or T 1 3/4 (both are through-hole radial configurations with similar mechanical footprints)

Three substitute parts meet these criteria with varying wavelength and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

BIR-BM53E4G-1 (Recommended Primary Substitute)

The BIR-BM53E4G-1 is the preferred substitute for TSUS5201 applications. It maintains identical operating temperature range (-40°C to 85°C), identical mounting type (Through Hole), and identical package form factor (Radial). Wavelength deviation is minimal (940nm vs. 950nm), remaining within near-infrared spectrum compatibility. Product status is Active, ensuring long-term availability and supply chain stability. RoHS3 compliance is confirmed. Forward current rating of 100mA is acceptable for applications not requiring the full 150mA capacity of the original part. Higher radiant intensity (19.42mW/sr @ 50mA) provides improved optical output.

SIR-563ST3FN (Secondary Substitute)

The SIR-563ST3FN is acceptable as a secondary substitute. Wavelength (940nm) and viewing angle (30°) match TSUS5201 specifications closely. Product status is Active. RoHS3 compliance is confirmed. Package form factor differs (T 1 3/4 vs. Radial), requiring PCB layout verification for mechanical compatibility. Operating temperature range is narrower (-25°C to 85°C), unsuitable for applications requiring -40°C operation. Lower radiant intensity (9mW/sr @ 50mA) may require circuit design adjustment.

SIR-568ST3F (Not Recommended for New Designs)

The SIR-568ST3F does not meet current design standards. Product status is "Not For New Designs," indicating manufacturer discontinuation trajectory. Wavelength deviation is significant (850nm vs. 950nm), potentially affecting system performance in wavelength-dependent applications. Operating temperature range is narrower (-25°C to 85°C). Use only for legacy system maintenance where no other substitute is viable.

Frequently Asked Questions (FAQ)

Q: Can BIR-BM53E4G-1 directly replace TSUS5201 without circuit modification?

A: BIR-BM53E4G-1 is mechanically and electrically compatible for most applications. Forward voltage is lower (1.25V vs. 2.2V), requiring current-limiting resistor recalculation. Maximum forward current is lower (100mA vs. 150mA); verify application current requirements do not exceed 100mA. Wavelength difference (940nm vs. 950nm) is negligible for general IR applications but may require validation in wavelength-sensitive systems.

Q: Why is SIR-568ST3F not recommended despite being listed as a substitute?

A: SIR-568ST3F carries "Not For New Designs" status, indicating the manufacturer is phasing out this component. Wavelength is significantly different (850nm vs. 950nm), potentially causing incompatibility in receiver-dependent applications. Operating temperature minimum is -25°C, excluding use in extended low-temperature environments. This part is suitable only for maintaining existing legacy systems.

Q: What is the impact of package form factor differences (Radial vs. T 1 3/4)?

A: Both Radial and T 1 3/4 packages are through-hole configurations with similar mechanical footprints. Substitution requires verification that PCB pad spacing and component height clearances accommodate the alternate package. Mechanical fit must be confirmed before production implementation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TSUS5201 and all three substitute parts (BIR-BM53E4G-1, SIR-563ST3FN, SIR-568ST3F) are confirmed RoHS3 compliant, meeting current environmental and regulatory requirements.

Q: Which substitute has the best long-term availability?

A: BIR-BM53E4G-1 is the optimal choice for long-term availability. It carries Active product status with 16,968 units in stock, indicating strong manufacturer commitment and supply chain stability. SIR-563ST3FN is also Active but with lower inventory (2,852 units). SIR-568ST3F should be avoided due to "Not For New Designs" status.