TSUS5202 Infrared Emitter 950nm Equivalent & Substitute Parts

Part Overview

The TSUS5202 is a radial infrared (IR) emitter operating at 950nm wavelength, manufactured by Vishay Semiconductor Opto Division. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The TSUS5202 delivers 20mW/sr radiant intensity at 100mA forward current with a 30° viewing angle, designed for through-hole mounting applications requiring near-infrared emission in the 950nm spectrum.

Substiute Parts

TSUS5202

Vishay Semiconductor Opto DivisionIn Stock: 15597TSUS5202 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 for the TSUS5202 is determined by the following critical parameters: wavelength (950nm primary requirement), forward current capability (150mA maximum), radiant intensity output, viewing angle (30° nominal), through-hole mounting compatibility, and radial package configuration. The substitute parts listed represent alternatives that maintain functional equivalence within the infrared emitter category while accommodating minor variations in wavelength, current ratings, and intensity specifications.

The three substitute parts are grouped as follows:

BIR-BM53E4G-1 (American Bright Optoelectronics): 940nm wavelength, 100mA maximum current, 19.42mW/sr radiant intensity, 25° viewing angle, radial package. Active product status.

SIR-563ST3FN (Rohm Semiconductor): 940nm wavelength, 100mA maximum current, 9mW/sr radiant intensity, 30° viewing angle, T 1 3/4 package. Active product status.

SIR-568ST3F (Rohm Semiconductor): 850nm wavelength, 100mA maximum current, 18mW/sr radiant intensity, 26° viewing angle, T 1 3/4 package. Not for new designs status.

Parameter Comparison

Engineering Selection Recommendations

BIR-BM53E4G-1 is the primary substitute for new designs. This part maintains active product status, ROHS3 compliance, and operates across the full temperature range (-40°C ~ 85°C) matching the original TSUS5202. The 940nm wavelength is within 10nm of the original 950nm specification, and radiant intensity (19.42mW/sr @ 50mA) closely approximates the original performance. The radial package configuration ensures mechanical compatibility with existing through-hole PCB layouts. Forward current is reduced to 100mA, requiring circuit design verification.

SIR-563ST3FN is an alternative for applications where 940nm wavelength and 30° viewing angle are critical parameters. This part maintains active product status and ROHS3 compliance. The T 1 3/4 package requires PCB footprint modification. Operating temperature range is limited to -25°C ~ 85°C. Radiant intensity is significantly lower (9mW/sr @ 50mA), making this option suitable only for applications with reduced intensity requirements.

SIR-568ST3F is not recommended for new designs due to its "Not For New Designs" product status. The 850nm wavelength deviates substantially from the 950nm specification. This part is listed for reference only in legacy system maintenance scenarios where wavelength compatibility is not critical.

Frequently Asked Questions (FAQ)

Q: Can BIR-BM53E4G-1 directly replace TSUS5202 in existing circuits?

A: BIR-BM53E4G-1 is mechanically and electrically compatible for through-hole mounting. The 10nm wavelength difference (940nm vs 950nm) is within typical infrared detector sensitivity ranges. However, the maximum forward current is reduced from 150mA to 100mA, requiring circuit verification to ensure adequate bias current and light output for the application.

Q: What is the impact of the T 1 3/4 package used in SIR-563ST3FN and SIR-568ST3F?

A: The T 1 3/4 package has different mechanical dimensions than the radial package of TSUS5202. PCB footprint modification is required. Verify mounting hole spacing and component clearance before implementation.

Q: Why is SIR-568ST3F listed if it is not recommended for new designs?

A: SIR-568ST3F is included for reference in legacy system maintenance and repair scenarios. The 850nm wavelength represents a significant deviation from the 950nm specification and should only be used when wavelength flexibility is confirmed by system requirements.

Q: How does the radiant intensity difference affect system performance?

A: BIR-BM53E4G-1 delivers 19.42mW/sr @ 50mA, closely matching TSUS5202 at 20mW/sr @ 100mA. SIR-563ST3FN delivers only 9mW/sr @ 50mA, representing approximately 45% lower intensity. Applications requiring specific light output levels must account for these differences in circuit design and detector sensitivity settings.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TSUS5202, BIR-BM53E4G-1, SIR-563ST3FN, and SIR-568ST3F are all ROHS3 compliant, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the temperature range consideration for SIR-563ST3FN and SIR-568ST3F?

A: Both Rohm parts operate from -25°C ~ 85°C, compared to TSUS5202 and BIR-BM53E4G-1 which operate from -40°C ~ 85°C. Applications requiring operation below -25°C must use TSUS5202 (if available) or BIR-BM53E4G-1.