QED221 Infrared Emitter - Equivalent & Substitute Parts

Part Overview

The QED221 is an infrared (IR) emitter manufactured by onsemi, designed for applications requiring 880nm wavelength emission at 100mA forward current. This component features a radial, 5mm diameter package suitable for through-hole mounting. The QED221 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

QED221

onsemiIn Stock: 747QED221 Datasheet

Current PartRFQ

IR333/H0

Everlight Electronics Co LtdIn Stock: 723IR333/H0 Datasheet

SimilarRFQ

IR333/H0/L10

Everlight Electronics Co LtdIn Stock: 110536IR333/H0/L10 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the QED221 is based on the following critical parameters that must align for functional equivalence:

• Mounting Type: Through Hole (radial configuration)
• Package Diameter: 5mm radial form factor
• Current Rating: 100mA maximum forward current
• Viewing Angle: 40° beam angle
• Orientation: Top View

The substitute parts identified (IR333/H0 and IR333/H0/L10) share identical mounting characteristics, current ratings, and viewing angles. However, these substitutes operate at 940nm wavelength rather than 880nm, and feature different forward voltage and radiant intensity specifications. Selection of a substitute requires confirmation that the application can tolerate wavelength variation and the corresponding changes in optical output characteristics.

Parameter Comparison

Engineering Selection Recommendations

The QED221 is obsolete; therefore, substitute selection is driven by product availability and application requirements.

IR333/H0 (Everlight Electronics) is an active product with bulk packaging availability. This substitute maintains mechanical and electrical compatibility at the 100mA current level and 40° viewing angle. The 940nm wavelength represents a 60nm shift from the original 880nm specification, with correspondingly lower radiant intensity (5.6mW/sr versus 10mW/sr). Forward voltage is reduced to 1.2V–1.4V. The operating temperature range is limited to -40°C ~ 85°C, compared to the QED221's -40°C ~ 100°C.

IR333/H0/L10 (Everlight Electronics) is an active product with significantly higher inventory availability. This variant operates at the same 940nm wavelength as IR333/H0 but delivers higher radiant intensity (11mW/sr), exceeding the QED221 specification. Forward voltage and operating temperature range are identical to IR333/H0. The higher radiant intensity may provide improved performance in applications sensitive to optical output.

Both substitutes carry identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, matching the original part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can IR333/H0 or IR333/H0/L10 be used as direct drop-in replacements for QED221?

A: Both substitutes share identical mounting type (through-hole radial), package diameter (5mm), current rating (100mA), and viewing angle (40°). Physical installation is compatible. However, the 940nm wavelength differs from the QED221's 880nm specification, and forward voltage is lower (1.2V–1.4V versus 1.7V). Circuit design must accommodate these electrical differences. Application-level compatibility depends on whether the system can tolerate wavelength variation.

Q: What is the difference between IR333/H0 and IR333/H0/L10?

A: Both parts are manufactured by Everlight Electronics and operate at 940nm with identical forward voltage ranges (1.2V–1.4V) and operating temperature limits (-40°C ~ 85°C). The primary distinction is radiant intensity: IR333/H0 delivers 5.6mW/sr at 100mA, while IR333/H0/L10 delivers 11mW/sr at 100mA. IR333/H0/L10 provides approximately twice the optical output and is available in significantly higher quantities.

Q: Are there wavelength compatibility concerns when substituting 880nm with 940nm?

A: Wavelength selection is application-dependent. The 60nm shift from 880nm to 940nm may affect detector response, optical filtering, and system performance. Applications using wavelength-specific photodiodes or filters require verification that 940nm operation is acceptable. This determination must be made at the system level.

Q: What are the temperature operating range differences?

A: The QED221 operates from -40°C to 100°C, while both Everlight substitutes operate from -40°C to 85°C. Applications requiring operation above 85°C cannot use these substitutes without thermal management modifications or alternative component selection.

Q: Are compliance certifications equivalent between QED221 and the substitute parts?

A: All three parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, indicating equivalent export control and tariff treatment. REACH status for the substitutes is not provided in the available data.