HSDL-4270 Equivalent & Substitute Parts

Part Overview

The HSDL-4270 is an infrared (IR) emitter operating at 940nm wavelength, designed for through-hole mounting applications requiring 100mA forward current and 1.3V forward voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part delivers 76mW/sr radiant intensity at 100mA with a 15° viewing angle in a T 1 3/4 package format.

Substiute Parts

HSDL-4270

Lite-On Inc.In Stock: 902HSDL-4270 Datasheet

Current PartRFQ

TSAL6100

Vishay Semiconductor Opto DivisionIn Stock: 213856TSAL6100 Datasheet

DirectRFQ

IR333C/H0/L10

Everlight Electronics Co LtdIn Stock: 91242IR333C/H0/L10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HSDL-4270 is determined by the following criteria:

• Wavelength: 940nm (exact match required)
• Current rating: 100mA maximum (equal or greater acceptable)
• Forward voltage: 1.3V nominal (±0.15V tolerance acceptable for circuit compatibility)
• Mounting type: Through hole (mechanical compatibility)
• Package format: T 1 3/4 or equivalent radial 5mm diameter (physical fit requirement)
• Operating temperature range: -40°C ~ 85°C minimum (environmental compatibility)

The substitute parts listed below meet these core electrical and mechanical parameters, enabling direct replacement in applications where the HSDL-4270 is no longer available.

Parameter Comparison

Engineering Selection Recommendations

Both TSAL6100 and IR333C/H0/L10 are active production parts suitable for replacing the obsolete HSDL-4270. Selection between these substitutes depends on application-specific requirements:

TSAL6100 provides the closest electrical match to the HSDL-4270, with forward voltage of 1.35V and radiant intensity of 80mW/sr @ 100mA, representing a 5.3% increase in output intensity. This part carries ROHS3 compliance and MSL 1 rating, indicating superior moisture handling characteristics compared to the original part.

IR333C/H0/L10 operates at 1.2V forward voltage with a wider 40° viewing angle. The radiant intensity specification of 11mW/sr is measured at 20mA rather than 100mA, making direct intensity comparison at full current rating not directly available from provided data. This part also carries ROHS3 compliance and MSL 1 rating.

Both substitute parts maintain the required 940nm wavelength, 100mA current rating, through-hole mounting configuration, and -40°C ~ 85°C operating temperature range. Active product status ensures ongoing availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can TSAL6100 directly replace HSDL-4270 in existing circuit designs?

A: Yes. TSAL6100 meets all core electrical parameters: 940nm wavelength, 100mA maximum current, 1.35V forward voltage (within acceptable tolerance of the 1.3V nominal), and identical operating temperature range. The radial 5mm package (T 1 3/4) is mechanically compatible with through-hole mounting. The 5° wider viewing angle (20° vs 15°) may affect beam concentration in applications requiring narrow beam focus.

Q: What are the key differences between TSAL6100 and IR333C/H0/L10?

A: Forward voltage differs (1.35V vs 1.2V), and viewing angle is significantly wider for IR333C/H0/L10 (40° vs 20°). Radiant intensity specifications are measured at different current levels, limiting direct comparison. Both parts are active production components with superior moisture sensitivity ratings compared to the obsolete HSDL-4270.

Q: Are there any compliance or environmental considerations when substituting?

A: Both substitute parts carry ROHS3 compliance and MSL 1 (unlimited moisture exposure) ratings, compared to the HSDL-4270's MSL 2A (4 weeks). This represents an improvement in environmental robustness and regulatory compliance for new designs or production runs.

Q: Does the viewing angle difference affect circuit performance?

A: Viewing angle determines beam concentration and divergence. The HSDL-4270 provides a narrow 15° beam, TSAL6100 provides 20°, and IR333C/H0/L10 provides 40°. Applications requiring narrow beam focus should prioritize TSAL6100. Applications tolerating wider beam distribution may use either substitute.

Q: What is the inventory status of these substitute parts?

A: TSAL6100 has 213,788 units in stock. IR333C/H0/L10 has 91,163 units in stock. Both represent active production parts with established supply chains, unlike the obsolete HSDL-4270 (797 units remaining).