TSHA5500 Infrared Emitter 875nm Equivalent & Substitute Parts

Part Overview

The TSHA5500 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 100mA forward current with 1.5V typical forward voltage and 16mW/sr radiant intensity at 100mA. The product is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

TSHA5500

Vishay Semiconductor Opto DivisionIn Stock: 4909TSHA5500 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

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TSHA5500 is determined by the following critical parameters: wavelength (875nm ±5nm tolerance typical for IR emitters), maximum forward current (100mA), forward voltage compatibility (1.5V nominal), and through-hole mounting configuration. The viewing angle and radiant intensity may vary within acceptable ranges depending on application requirements. Package form factor (radial vs. T 1 3/4) represents a mechanical constraint that affects board layout compatibility.

The identified substitute parts maintain electrical compatibility across wavelength, current rating, and voltage specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

HSDL-4251 is the primary substitute for TSHA5500 applications requiring extended temperature operation (-40°C ~ 85°C). This part maintains identical current and temperature specifications while offering superior radiant intensity (56mW/sr @ 100mA) and active product status. The 870nm wavelength remains within standard IR emitter tolerance bands for 875nm applications. Package transition from radial to T 1 3/4 requires PCB layout modification.

HSDL-4220 serves as an alternative for applications with relaxed temperature requirements (0°C ~ 70°C). This part maintains exact wavelength and voltage specifications but operates at reduced radiant intensity and narrower viewing angle (30° vs. 48°). Package form factor change applies identically.

Both substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original component's regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can HSDL-4220 or HSDL-4251 directly replace TSHA5500 without circuit modification?

A: Electrical substitution is valid for both parts. Forward current (100mA max) and voltage (1.4V–1.5V) compatibility ensure circuit operation. However, package geometry differs (T 1 3/4 vs. radial), requiring PCB footprint redesign. Radiant intensity differences may affect optical system performance depending on application sensitivity.

Q: What is the wavelength tolerance for IR emitter substitution?

A: The TSHA5500 operates at 875nm. HSDL-4251 at 870nm represents a 5nm shift within typical IR emitter manufacturing tolerance. HSDL-4220 maintains exact 875nm specification. Wavelength selection depends on photodetector spectral response characteristics in the target application.

Q: Does HSDL-4220 operate across the full temperature range of TSHA5500?

A: No. HSDL-4220 operates 0°C ~ 70°C, while TSHA5500 and HSDL-4251 both operate -40°C ~ 85°C. Applications requiring extended low-temperature operation must use HSDL-4251.

Q: How do viewing angle differences affect substitution?

A: TSHA5500 provides 48° viewing angle; both substitutes offer 30°. Narrower viewing angle concentrates radiant intensity but reduces off-axis optical coverage. Application optical geometry must accommodate this change.

Q: Are both substitute parts currently available?

A: Yes. HSDL-4220 inventory: 2,692 pcs. HSDL-4251 inventory: 8,400 pcs. Both are active products with established supply chains.