TSHA5203 Infrared Emitter 875nm Equivalent & Substitute Parts

Part Overview

The TSHA5203 is an infrared (IR) emitter operating at 875nm wavelength, designed for through-hole radial mounting applications. Manufactured by Vishay Semiconductor Opto Division, this component delivers 50mW/sr radiant intensity at 100mA forward current with a 24° viewing angle. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

TSHA5203

Vishay Semiconductor Opto DivisionIn Stock: 960TSHA5203 Datasheet

Current PartRFQ

HSDL-4220

Lite-On Inc.In Stock: 2750HSDL-4220 Datasheet

MFR RecommendedRFQ

HSDL-4251

Lite-On Inc.In Stock: 8450HSDL-4251 Datasheet

MFR RecommendedRFQ

HSDL-4261

Lite-On Inc.In Stock: 1202HSDL-4261 Datasheet

MFR RecommendedRFQ

SIR-563ST3FN

Rohm SemiconductorIn Stock: 2941SIR-563ST3FN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TSHA5203 is determined by the following criteria:

Primary Compatibility Parameters:

• Wavelength range: 870nm–875nm (near-infrared spectrum alignment)
• Maximum forward current: 100mA (electrical rating match)
• Forward voltage: 1.4V–1.5V (operating point compatibility)
• Mounting type: Through Hole (mechanical fit requirement)
• RoHS3 compliance (regulatory requirement)

Secondary Considerations:

• Radiant intensity specifications (application-dependent performance)
• Viewing angle tolerance (optical beam characteristics)
• Operating temperature range (environmental suitability)
• Package configuration (radial or T 1 3/4 form factors)

The substitute parts listed below meet the primary compatibility parameters. Radial-package substitutes (HSDL-4261) maintain identical mechanical mounting. T 1 3/4 package alternatives (HSDL-4220, HSDL-4251) require mechanical redesign but provide electrical equivalence. The SIR-563ST3FN operates at 940nm wavelength and represents a longer-wavelength alternative suitable only for applications tolerant of spectral shift.

Parameter Comparison

Engineering Selection Recommendations

Direct Radial Package Replacement: HSDL-4261 is the preferred substitute for applications requiring identical radial mounting geometry. This Lite-On component operates at 870nm (5nm shorter wavelength) with 100mA maximum current and 1.4V typical forward voltage. Product status is active with full RoHS3 compliance. Operating temperature range extends to -40°C minimum, matching the TSHA5203 lower limit. Radiant intensity specification of 36mW/sr @ 20mA differs from the original; applications sensitive to optical output intensity require validation.

T 1 3/4 Package Alternatives: HSDL-4251 provides the closest electrical match among T 1 3/4 options, with 870nm wavelength, 100mA current rating, and -40°C ~ 85°C operating range identical to the TSHA5203. Radiant intensity of 56mW/sr @ 100mA exceeds the original specification. This part requires mechanical redesign for board integration due to package form factor change.

HSDL-4220 operates at 875nm (exact wavelength match) but with restricted operating temperature range (0°C ~ 70°C), unsuitable for applications requiring -40°C operation. Radiant intensity is significantly lower at 22mW/sr @ 50mA.

Extended Wavelength Alternative: SIR-563ST3FN from Rohm operates at 940nm, representing a 65nm wavelength shift. This part is suitable only for applications where spectral sensitivity permits longer-wavelength operation. Active product status and -25°C ~ 85°C operating range provide environmental flexibility. Radiant intensity is substantially reduced at 9mW/sr @ 50mA.

All substitute parts maintain ROHS3 compliance and through-hole mounting compatibility with the original design category.

Frequently Asked Questions (FAQ)

Q: Can HSDL-4261 be used as a direct replacement for TSHA5203? A: HSDL-4261 is mechanically compatible (radial package) and electrically suitable for 875nm applications. The 5nm wavelength difference (870nm vs 875nm) and different radiant intensity specification require application validation. Both parts support 100mA forward current and -40°C minimum operating temperature.

Q: What is the impact of switching from radial to T 1 3/4 package? A: Package form factor change requires mechanical redesign of the PCB footprint and component mounting structure. Electrical performance remains compatible if wavelength and current ratings are acceptable. T 1 3/4 packages typically offer different viewing angles and spatial characteristics compared to radial configurations.

Q: Is SIR-563ST3FN suitable for all TSHA5203 applications? A: No. SIR-563ST3FN operates at 940nm wavelength, a 65nm shift from the original 875nm specification. This substitute is limited to applications where the detector or optical system is insensitive to this spectral difference. Radiant intensity is significantly lower (9mW/sr @ 50mA vs 50mW/sr @ 100mA).

Q: Which substitute offers the best temperature range coverage? A: HSDL-4251 and TSHA5203 both support -40°C ~ 85°C operating range. SIR-563ST3FN extends to -25°C minimum. HSDL-4220 is limited to 0°C ~ 70°C and is unsuitable for low-temperature applications.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts (HSDL-4220, HSDL-4251, HSDL-4261, SIR-563ST3FN) maintain ROHS3 compliance, matching the original TSHA5203 regulatory status.

Q: What is the primary reason for substitution? A: TSHA5203 is classified as obsolete. Active alternatives ensure design continuity and supply chain reliability for new production and maintenance applications.