QEB441 Equivalent & Substitute Parts

Part Overview

The QEB441 is a visible light emitter operating at 730nm wavelength, manufactured by onsemi in a 2-PLCC surface mount package. Designed for applications requiring red visible light emission with 100mA forward current capability and 2.1V typical forward voltage, this component delivers 2mW/sr radiant intensity at rated current with a 120° viewing angle.

The QEB441 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, design updates, or inventory replenishment where original stock is unavailable or depleted.

Substiute Parts

QEB441

onsemiIn Stock: 1119QEB441 Datasheet

Current PartRFQ

VSMY3850-GS08

Vishay Semiconductor Opto DivisionIn Stock: 2321VSMY3850-GS08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QEB441 requires matching the following critical electrical and mechanical parameters:

• Emitter Type: Visible light emission capability
• Wavelength: 730nm red spectrum operation
• Forward Current Rating: 100mA maximum DC forward current
• Forward Voltage: Nominal 2.1V operation
• Radiant Intensity: Minimum 2mW/sr @ 100mA
• Viewing Angle: 120° beam pattern
• Mounting: Surface mount technology
• Package Form Factor: 2-lead configuration compatible with PLCC footprint

The VSMY3850-GS08 is listed as a substitute part. However, this component operates at 850nm wavelength in the infrared spectrum, representing a functional shift from visible light emission to infrared emission. This substitution is valid only for applications where infrared emission is functionally equivalent to the original visible 730nm specification, or where system design permits wavelength modification.

Parameter Comparison

Engineering Selection Recommendations

The QEB441 is obsolete; the VSMY3850-GS08 is active and available. Selection between these components depends on application requirements:

Electrical Compatibility: Both components share identical 100mA forward current ratings and 120° viewing angles. The VSMY3850-GS08 operates at lower forward voltage (1.6V vs. 2.1V) and delivers higher radiant intensity (12mW/sr vs. 2mW/sr). Circuit designs must accommodate these electrical differences.

Wavelength Consideration: The QEB441 emits visible red light at 730nm; the VSMY3850-GS08 emits infrared at 850nm. These are functionally distinct emission spectra. Substitution is valid only for applications where infrared emission replaces visible light without affecting system performance or user interface requirements.

Temperature Range: The QEB441 operates across -55°C to 100°C; the VSMY3850-GS08 operates across -40°C to 85°C. Applications requiring extended low-temperature operation below -40°C cannot use the VSMY3850-GS08.

Packaging and Handling: The QEB441 uses 2-PLCC packaging with MSL 1 (unlimited moisture sensitivity); the VSMY3850-GS08 uses 2-SMD J-Lead packaging with MSL 3 (168-hour moisture sensitivity). PCB layout modifications and moisture control procedures may be required.

Compliance Status: Both components are REACH Unaffected and classified as EAR99. The VSMY3850-GS08 is RoHS3 Compliant.

Frequently Asked Questions (FAQ)

Q: Can the VSMY3850-GS08 directly replace the QEB441 in existing designs?

A: Direct replacement requires verification that infrared emission at 850nm is functionally acceptable in place of visible red light at 730nm. Electrical parameters differ (forward voltage and radiant intensity), necessitating circuit review. Package geometry differs (2-PLCC vs. 2-SMD J-Lead), requiring PCB layout evaluation.

Q: What are the key electrical differences between these components?

A: The VSMY3850-GS08 operates at 1.6V forward voltage compared to the QEB441's 2.1V, reducing power dissipation. The VSMY3850-GS08 delivers 12mW/sr radiant intensity versus the QEB441's 2mW/sr, providing six times greater optical output. Both support 100mA forward current.

Q: Are there temperature limitations when substituting?

A: Yes. The VSMY3850-GS08 maximum operating temperature is 85°C, while the QEB441 extends to 100°C. Applications requiring operation above 85°C cannot use the VSMY3850-GS08. The QEB441 minimum temperature is -55°C; the VSMY3850-GS08 minimum is -40°C.

Q: What packaging considerations apply to substitution?

A: The QEB441 uses 2-PLCC surface mount packaging; the VSMY3850-GS08 uses 2-SMD J-Lead packaging. These have different footprints and solder pad configurations. PCB redesign is required. The VSMY3850-GS08 has MSL 3 rating (168-hour moisture sensitivity) versus the QEB441's MSL 1 (unlimited), requiring enhanced moisture control during storage and assembly.

Q: Is the wavelength difference critical for my application?

A: Wavelength selection depends on application function. Visible light applications (indicators, displays, human-visible signaling) require the 730nm visible spectrum. Infrared applications (remote control, optical sensing, night vision) use the 850nm infrared spectrum. These are not interchangeable for applications dependent on specific wavelength properties.