TSFF5210 Infrared Emitter 870nm Equivalent & Substitute Parts

Part Overview

The TSFF5210 is an infrared (IR) emitter manufactured by Vishay Semiconductor Opto Division, designed for applications requiring 870nm wavelength emission at 100mA forward current. This component features a radial package configuration with 5mm diameter form factor (T 1 3/4) and operates across an extended temperature range of -40°C to 85°C.

The TSFF5210 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

TSFF5210

Vishay Semiconductor Opto DivisionIn Stock: 17389TSFF5210 Datasheet

Current PartRFQ

HSDL-4230

Lite-On Inc.In Stock: 20290HSDL-4230 Datasheet

MFR RecommendedRFQ

HSDL-4250

Lite-On Inc.In Stock: 1868HSDL-4250 Datasheet

MFR RecommendedRFQ

HSDL-4260

Lite-On Inc.In Stock: 1075HSDL-4260 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSFF5210 are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Wavelength: 870nm or 875nm (near-infrared spectrum compatibility)
• Forward Current Rating: 100mA maximum
• Package Type: T 1 3/4 radial or equivalent form factor
• Mounting Type: Through Hole
• Operating Temperature Range: Minimum -40°C to 85°C coverage

Secondary Compatibility Factors:

• Forward Voltage (Vf): 1.4V to 1.5V range
• Radiant Intensity: Minimum 39mW/sr (performance variation acceptable within application tolerance)
• Viewing Angle: 15° to 20° (directional characteristics)
• Compliance: ROHS3 and REACH requirements

The substitute parts listed below meet these criteria and are classified as active products with current manufacturing status, ensuring long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

HSDL-4250 is the primary substitute for TSFF5210 applications. This part matches the exact wavelength (870nm), maintains identical forward current rating (100mA), supports the full operating temperature range (-40°C to 85°C), and provides equivalent radiant intensity (124mW/sr @ 100mA). The package configuration (T 1 3/4) and through-hole mounting are compatible. Forward voltage is marginally lower (1.4V vs 1.5V), which is within acceptable tolerance for most circuit designs. Active product status ensures ongoing availability.

HSDL-4260 serves as an alternative for applications where slightly higher radiant intensity (150mW/sr @ 100mA) is beneficial. This part operates at 875nm wavelength with identical current and temperature specifications. The radial package configuration and 15° viewing angle represent minor variations from the original specification but remain functionally compatible for most through-hole mounting scenarios.

HSDL-4230 is suitable only for applications with restricted operating temperature requirements (0°C to 70°C maximum). This part operates at 875nm with 100mA current rating but exhibits lower radiant intensity (39mW/sr @ 50mA). Use this substitute only when temperature constraints align with application requirements.

All substitute parts maintain ROHS3 compliance and REACH compliance status, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can HSDL-4250 directly replace TSFF5210 in existing designs?

A: Yes. HSDL-4250 matches the critical electrical parameters (100mA forward current, 870nm wavelength, -40°C to 85°C operating range) and package type (T 1 3/4 through-hole). The forward voltage difference (1.4V vs 1.5V) is within standard circuit tolerance. No design modifications are required for most applications.

Q: What is the difference between HSDL-4250 and HSDL-4260?

A: Both parts operate at 100mA with identical temperature ranges (-40°C to 85°C). HSDL-4250 emits at 870nm with 124mW/sr radiant intensity, while HSDL-4260 emits at 875nm with higher radiant intensity (150mW/sr). HSDL-4260 uses a radial package; HSDL-4250 uses T 1 3/4 package. Select based on wavelength requirement and package compatibility.

Q: Why is HSDL-4230 not recommended as a primary substitute?

A: HSDL-4230 operates within a restricted temperature range (0°C to 70°C), which does not cover the full -40°C to 85°C specification of TSFF5210. Additionally, radiant intensity is measured at 50mA (39mW/sr) rather than 100mA, making direct performance comparison difficult. Use HSDL-4230 only when application temperature requirements are limited to 0°C to 70°C.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. HSDL-4230, HSDL-4250, and HSDL-4260 are all ROHS3 compliant and REACH unaffected, matching the compliance status of TSFF5210.

Q: What is the significance of viewing angle differences (20° vs 15° vs 17°)?

A: Viewing angle defines the directional emission pattern. TSFF5210 has a 20° viewing angle, while substitutes range from 15° to 17°. Narrower viewing angles concentrate emission intensity in a tighter beam. Select based on application optical requirements; most general-purpose IR applications tolerate this variation.

Q: Can I use HSDL-4260 in place of TSFF5210 despite the radial package difference?

A: HSDL-4260 uses a radial package configuration compatible with through-hole mounting. If your PCB layout accommodates radial leads, HSDL-4260 is functionally compatible. Verify mechanical fit and lead spacing before substitution.