TSHA6203 Infrared Emitter 875nm Equivalent & Substitute Parts

Part Overview

The TSHA6203 is an infrared (IR) emitter manufactured by Vishay Semiconductor Opto Division, designed for 875nm wavelength applications requiring 100mA forward current operation. This component features a radial package configuration with 24° viewing angle and operates across -40°C to 85°C. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

TSHA6203

Vishay Semiconductor Opto DivisionIn Stock: 5465TSHA6203 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 TSHA6203 is determined by the following criteria:

Primary Matching Parameters:

• Wavelength range: 870nm to 875nm (near-infrared spectrum compatibility)
• Maximum forward current: 100mA minimum
• Package type: Radial configuration for mechanical fit
• Through-hole mounting compatibility
• Operating temperature range: Must support -40°C minimum

Secondary Compatibility Factors:

• Forward voltage tolerance within typical application circuit design margins
• Radiant intensity sufficient for application requirements
• Viewing angle compatibility with optical system design
• RoHS3 compliance and moisture sensitivity level

The substitute parts listed below meet the primary matching parameters and maintain functional equivalence within standard application tolerances.

Parameter Comparison

Engineering Selection Recommendations

HSDL-4261 (Lite-On) - Radial Package Match

The HSDL-4261 provides the closest mechanical compatibility with identical radial package configuration. Operating temperature range of -40°C to 70°C covers the TSHA6203 minimum threshold. Wavelength shift to 870nm represents minimal spectral deviation within near-infrared applications. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original component specifications.

HSDL-4251 (Lite-On) - Electrical Performance Priority

The HSDL-4251 delivers superior radiant intensity (56mW/sr @ 100mA) compared to the TSHA6203 (50mW/sr @ 100mA) with matching 100mA forward current rating. Operating temperature range of -40°C to 85°C fully encompasses the original specification. T 1 3/4 package requires mechanical redesign but maintains through-hole mounting compatibility. Active product status and ROHS3 compliance ensure regulatory alignment.

HSDL-4220 (Lite-On) - Wavelength Match Priority

The HSDL-4220 maintains exact 875nm wavelength specification matching the TSHA6203. Active product status and ROHS3 compliance provide supply continuity. Operating temperature range limitation (0°C to 70°C) excludes low-temperature operation below 0°C. T 1 3/4 package requires mechanical redesign. Forward voltage reduction to 1.5V and radiant intensity decrease to 22mW/sr @ 50mA necessitate circuit evaluation.

SIR-563ST3FN (Rohm Semiconductor) - Extended Temperature Range

The SIR-563ST3FN operates across -25°C to 85°C with active product status and ROHS3 compliance. Wavelength shift to 940nm represents significant spectral deviation suitable only for applications tolerant of longer wavelength operation. T 1 3/4 package requires mechanical redesign. Radiant intensity of 9mW/sr @ 50mA is substantially lower than the TSHA6203 specification.

Frequently Asked Questions (FAQ)

Q: Can HSDL-4261 directly replace TSHA6203 in existing PCB designs?

A: Mechanical compatibility is confirmed through identical radial package configuration and through-hole mounting. Circuit-level evaluation is required to assess tolerance for 870nm wavelength operation and forward voltage reduction from 2.8V to 1.4V. Operating temperature range of -40°C to 70°C covers most industrial applications but excludes operation above 70°C.

Q: What is the primary difference between radial and T 1 3/4 packages?

A: Radial packages feature leads extending from opposite sides of the component body, suitable for through-hole mounting in radial configurations. T 1 3/4 packages use axial lead geometry with leads extending from opposite ends. Mechanical redesign of PCB footprints and lead routing is required when transitioning between these package types.

Q: Why does HSDL-4251 show higher radiant intensity than TSHA6203?

A: Radiant intensity specifications are measured at different forward current levels. HSDL-4251 specifies 56mW/sr @ 100mA while TSHA6203 specifies 50mW/sr @ 100mA. Direct comparison at identical current levels confirms HSDL-4251 delivers superior optical output within the same current rating.

Q: Is wavelength substitution from 875nm to 870nm acceptable?

A: Wavelength deviation of 5nm represents approximately 0.6% spectral shift within the near-infrared spectrum. Acceptability depends on application-specific optical filtering, detector sensitivity, and system design margins. Applications with narrow-band optical filters or wavelength-critical detection may require evaluation.

Q: What does MSL 1 (Unlimited) moisture sensitivity level indicate?

A: MSL 1 classification indicates unlimited shelf life without moisture control requirements. Components may be stored at standard ambient conditions without desiccant packaging or controlled humidity environments. HSDL-4261 and TSHA6203 both carry MSL 1 ratings, eliminating moisture handling differences.

Q: Can SIR-563ST3FN operate in applications designed for 875nm wavelength?

A: SIR-563ST3FN operates at 940nm wavelength, representing 65nm spectral shift from the TSHA6203 specification. This wavelength difference is suitable only for applications with broadband optical response or specific 940nm detector compatibility. Narrow-band optical systems designed for 875nm operation are not compatible.