TSHA6500 Infrared Emitter 875nm Equivalent & Substitute Parts

Part Overview

The TSHA6500 is an infrared (IR) emitter operating at 875nm wavelength with a maximum forward current of 100mA and typical forward voltage of 1.5V. Manufactured by Vishay Semiconductor Opto Division, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across wavelength, current rating, voltage characteristics, and mounting configuration.

Substiute Parts

TSHA6500

Vishay Semiconductor Opto DivisionIn Stock: 964TSHA6500 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 eligibility for the TSHA6500 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Wavelength: 875nm ± tolerance (870nm acceptable within IR spectrum continuity)
• Current Rating: 100mA maximum forward current
• Voltage: Forward voltage within 1.4V to 1.5V range
• Mounting Type: Through Hole configuration
• Operating Temperature Range: Must support -40°C to 85°C or equivalent industrial range

Identified Substitutes:

1. HSDL-4220 (Lite-On Inc.) — Active status, 875nm wavelength, 100mA rating, 1.5V forward voltage, T 1 3/4 package
2. HSDL-4251 (Lite-On Inc.) — Active status, 870nm wavelength, 100mA rating, 1.4V forward voltage, T 1 3/4 package, extended temperature range (-40°C to 85°C)

Both substitutes meet the core electrical parameters and through-hole mounting requirement. Package geometry differs (T 1 3/4 vs. Radial), requiring mechanical validation during integration.

Parameter Comparison

Engineering Selection Recommendations

HSDL-4251 (Primary Substitute): HSDL-4251 is the preferred substitute for TSHA6500 applications. It maintains identical maximum forward current (100mA), matches the full operating temperature range (-40°C to 85°C), and provides higher radiant intensity (56mW/sr @ 100mA vs. 16mW/sr @ 100mA). Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and EAR99 classification align with the original part. The 870nm wavelength remains within the near-infrared spectrum for most IR detection applications. Mechanical integration requires accommodation of T 1 3/4 package geometry in place of radial configuration.

HSDL-4220 (Secondary Substitute): HSDL-4220 provides exact wavelength matching (875nm) and identical forward voltage (1.5V) with 100mA current rating. However, the operating temperature range (0°C to 70°C) is narrower than the original specification, limiting suitability for applications requiring full -40°C to 85°C operation. This substitute is appropriate for controlled-environment applications within the 0°C to 70°C window. Active product status and ROHS3 compliance are maintained.

Compliance Considerations: Both substitutes maintain ROHS3 compliance, EAR99 ECCN classification, and REACH unaffected status, ensuring regulatory continuity with the original TSHA6500.

Frequently Asked Questions (FAQ)

Q: Can HSDL-4251 directly replace TSHA6500 in existing PCB layouts? A: Electrical compatibility is confirmed across current, voltage, and wavelength parameters. However, package geometry differs (T 1 3/4 vs. Radial). PCB footprint modification is required. Mechanical clearance and lead spacing must be validated against the original design.

Q: What is the significance of the 5nm wavelength difference between TSHA6500 (875nm) and HSDL-4251 (870nm)? A: Both wavelengths operate within the near-infrared spectrum used for IR detection and remote control applications. The 5nm difference is within typical IR detector sensitivity ranges. Application-specific detector spectral response curves should be consulted to confirm compatibility.

Q: Why does HSDL-4220 have a narrower operating temperature range than TSHA6500? A: Operating temperature range is determined by component design and manufacturing specifications. HSDL-4220 is rated 0°C to 70°C, while TSHA6500 and HSDL-4251 support -40°C to 85°C. Selection depends on the target application environment.

Q: Are there differences in radiant intensity between the main part and substitutes? A: Yes. TSHA6500 provides 16mW/sr @ 100mA, HSDL-4220 provides 22mW/sr @ 50mA, and HSDL-4251 provides 56mW/sr @ 100mA. Higher radiant intensity in HSDL-4251 may require circuit current limiting adjustments to maintain equivalent optical output in the application.

Q: What does the viewing angle difference (48° vs. 30°) mean for substitution? A: Viewing angle defines the half-angle at which radiant intensity drops to 50% of peak. TSHA6500 has a wider 48° angle, while both substitutes have 30° angles. Applications requiring wide-angle IR emission may need optical design review.

Q: Are both substitutes RoHS compliant? A: Yes. HSDL-4220 and HSDL-4251 are both ROHS3 compliant, matching the original TSHA6500 specification.

Q: What is the MSL (Moisture Sensitivity Level) difference between HSDL-4251 and the original part? A: TSHA6500 has MSL 1 (Unlimited shelf life), while HSDL-4251 has MSL 2A (4-week shelf life). HSDL-4251 requires controlled storage conditions and bake-out procedures before soldering if shelf life is exceeded.