OP245D Infrared Emitter 890nm Equivalent & Substitute Parts

Part Overview

The OP245D 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 radial through-hole package with a 40° viewing angle and operates across the -40°C to 100°C temperature range. The OP245D is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

OP245D

TT Electronics/Optek TechnologyIn Stock: 1021OP245D Datasheet

Current PartRFQ

QEE122

onsemiIn Stock: 1774QEE122 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OP245D is determined by the following critical parameters:

• Wavelength tolerance: 890nm ±10nm (880nm acceptable)
• Forward current rating: 50mA minimum
• Forward voltage: 1.7V–1.8V typical
• Viewing angle: 40° minimum
• Package type: Radial through-hole
• Orientation: Side View
• Operating temperature range: -40°C to 100°C minimum
• Compliance: ROHS3 and REACH requirements

The QEE122 from onsemi meets these substitution criteria with minor parameter variations within acceptable engineering tolerances for IR emitter applications.

Parameter Comparison

Engineering Selection Recommendations

The QEE122 is a direct functional substitute for the OP245D based on the following criteria:

• Both components maintain identical forward current ratings (50mA) and operating temperature ranges (-40°C to 100°C)
• Wavelength variation (880nm vs. 890nm) represents a 1.1% difference, acceptable for most IR detection and sensing applications
• Forward voltage difference (1.7V vs. 1.8V) is within standard component tolerance and does not require circuit redesign
• Both components feature identical through-hole radial packages with side-view orientation, ensuring mechanical compatibility
• Both meet ROHS3 and REACH compliance requirements
• The QEE122 offers the advantage of active product status with confirmed inventory availability (1700 pcs), whereas the OP245D is obsolete

The wider 50° viewing angle of the QEE122 compared to the OP245D's 40° angle provides improved light distribution, which is beneficial for applications with broader detection requirements.

Frequently Asked Questions (FAQ)

Q: Can the QEE122 be used as a direct pin-for-pin replacement for the OP245D?

A: Yes. Both components feature identical through-hole radial packages with side-view orientation. No PCB modifications are required for mechanical or electrical compatibility.

Q: What is the significance of the 10nm wavelength difference between 890nm and 880nm?

A: The 10nm difference represents a 1.1% variation in wavelength. For most infrared sensing and detection applications, this difference is within acceptable tolerance. Applications with wavelength-specific requirements should verify detector sensitivity at 880nm.

Q: Does the QEE122's wider 50° viewing angle affect compatibility?

A: The wider viewing angle is a beneficial characteristic. It provides improved light distribution compared to the OP245D's 40° angle. Applications designed for 40° will function with the wider angle; applications requiring narrow-angle emission should evaluate the impact on system performance.

Q: Are there compliance or certification differences between the two parts?

A: No. Both the OP245D and QEE122 are ROHS3 compliant and REACH unaffected. Both carry identical environmental and regulatory compliance status.

Q: Why is the OP245D listed as obsolete?

A: The OP245D has reached end-of-life status with the manufacturer. The QEE122 is an active product with ongoing manufacturing and inventory support, making it the recommended choice for new designs and system maintenance.

Q: What is the forward voltage tolerance between the two parts?

A: The OP245D specifies 1.8V typical forward voltage, while the QEE122 specifies 1.7V typical. This 0.1V difference is within standard component tolerance and does not require circuit modifications for most applications.