OP240D Infrared Emitter 890nm Equivalent & Substitute Parts

Part Overview

The OP240D is an infrared (IR) emitter manufactured by TT Electronics/Optek Technology, designed for applications requiring 890nm wavelength emission at 50mA forward current. This component features a 1.8V typical forward voltage and 40° viewing angle in a radial through-hole package configuration.

The OP240D is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, maintenance, and new system implementations where this wavelength and current specification are required.

Substiute Parts

OP240D

TT Electronics/Optek TechnologyIn Stock: 749OP240D Datasheet

Current PartRFQ

QEE122

onsemiIn Stock: 1774QEE122 Datasheet

MFR RecommendedRFQ

QEE122

onsemiIn Stock: 1774QEE122 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for IR emitters is determined by the following critical parameters:

• Wavelength compatibility: The substitute must operate within the near-infrared spectrum range suitable for the application. The OP240D operates at 890nm; substitutes operating at adjacent wavelengths (880nm–900nm range) are functionally equivalent for most IR detection and sensing applications.
• Forward current rating: The substitute must support the required 50mA DC forward current maximum without exceeding component ratings.
• Forward voltage: The substitute forward voltage must be compatible with the circuit design; typical values between 1.7V–1.8V are acceptable for standard IR emitter applications.
• Viewing angle: The substitute viewing angle must meet or exceed the application's field-of-view requirements. The OP240D specifies 40°; substitutes with 50° or greater viewing angles provide equivalent or improved performance.
• Package and mounting: The substitute must use identical through-hole radial packaging to ensure mechanical and electrical compatibility with existing PCB layouts.
• Operating temperature range: The substitute must support the full operating temperature range of -40°C to 100°C.
• Compliance certifications: The substitute must maintain ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

The QEE122 manufactured by onsemi is a direct substitute for the obsolete OP240D. Both components share identical maximum forward current (50mA), equivalent forward voltage specifications (1.7V vs. 1.8V), and matching operating temperature ranges (-40°C to 100°C). The QEE122 maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

The QEE122 operates at 880nm wavelength, which is 10nm lower than the OP240D's 890nm specification. This wavelength difference is within the standard tolerance range for infrared emitter applications and does not impact functional compatibility in typical IR sensing, detection, and communication circuits.

The QEE122 provides a 50° viewing angle compared to the OP240D's 40° specification, offering an expanded field of view. This represents an improvement in light distribution characteristics and does not introduce compatibility issues.

The QEE122 is currently in active production status with confirmed inventory availability (1700 pcs), whereas the OP240D is obsolete. Selection of the QEE122 ensures long-term component availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the QEE122 directly replace the OP240D in existing circuit designs?

A: Yes. Both components share identical maximum forward current (50mA), compatible forward voltage specifications (1.7V vs. 1.8V typical), matching through-hole radial packaging, and identical operating temperature ranges. No circuit modifications are required.

Q: Does the 10nm wavelength difference (890nm vs. 880nm) affect performance?

A: No. The 10nm difference falls within standard tolerance ranges for infrared emitter applications. Both wavelengths operate in the near-infrared spectrum and are compatible with standard IR photodiodes and phototransistors used in detection and sensing circuits.

Q: Why does the QEE122 have a 50° viewing angle instead of 40°?

A: The QEE122's wider 50° viewing angle provides improved light distribution compared to the OP240D's 40° specification. This represents an enhancement and does not create compatibility issues. Applications requiring the narrower 40° beam pattern will still function correctly with the QEE122.

Q: Are there any compliance or certification differences?

A: No. Both the OP240D and QEE122 maintain ROHS3 compliance and REACH unaffected status. No additional compliance verification is required for substitution.

Q: What is the availability status of each component?

A: The OP240D is obsolete with no active production. The QEE122 is in active production status with confirmed inventory of 1700 pcs available, ensuring reliable supply chain access for current and future applications.