OP280KT Equivalent & Substitute Parts

Part Overview

The OP280KT is an infrared (IR) emitter manufactured by TT Electronics / Optek Technology, designed for 850nm wavelength applications with a maximum forward current of 1A and typical forward voltage of 1.55V. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The 2-PLCC surface mount package and 90° viewing angle define its primary application scope.

Substiute Parts

OP280KT

TT Electronics / Optek TechnologyIn Stock: 1030OP280KT Datasheet

Current PartRFQ

VSML3710-GS08

Vishay Semiconductor Opto DivisionIn Stock: 2149VSML3710-GS08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP280KT is based on the following critical parameters:

• Package Compatibility: Both the main part and substitute must use the 2-PLCC surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.
• Wavelength Range: IR emitters for 850nm applications may accept substitute parts operating at adjacent wavelengths (such as 940nm) when system design permits spectral flexibility.
• Forward Current Rating: The substitute part must support the required operating current of the application. The OP280KT operates at up to 1A; substitutes with lower maximum current ratings (such as 100mA) are acceptable only if the application current requirement does not exceed the substitute's rating.
• Forward Voltage: Typical forward voltage must be compatible with the circuit's power supply and current-limiting design.
• Viewing Angle: The 90° viewing angle of the OP280KT defines the beam divergence; substitutes with different viewing angles (such as 120°) may be used depending on optical system requirements.
• Compliance & Status: The substitute part must maintain RoHS3 compliance and preferably have an active product status for long-term availability.

The VSML3710-GS08 is identified as a suitable substitute based on matching 2-PLCC packaging, surface mount configuration, and compliance certifications, with the understanding that wavelength (940nm vs. 850nm) and current rating (100mA vs. 1A) differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The VSML3710-GS08 is an active product with confirmed RoHS3 compliance and extended operating temperature range (-40°C to 85°C versus -25°C to 85°C), providing superior long-term availability and environmental performance compared to the obsolete OP280KT. Both components share identical 2-PLCC surface mount packaging and comply with ROHS3 and REACH requirements.

Selection of the VSML3710-GS08 as a substitute requires confirmation that the application can accommodate the following parameter differences: reduced maximum forward current (100mA versus 1A), different wavelength (940nm versus 850nm), and increased viewing angle (120° versus 90°). The lower moisture sensitivity level (MSL 3 versus MSL 2A) of the substitute part requires adjustment to storage and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the VSML3710-GS08 directly replace the OP280KT in existing designs?

A: Direct replacement is possible only if the application current requirement does not exceed 100mA and the system design accepts 940nm wavelength operation. The 2-PLCC package ensures mechanical compatibility with existing PCB layouts.

Q: What are the key differences between these two parts?

A: The primary differences are maximum forward current (1A vs. 100mA), wavelength (850nm vs. 940nm), viewing angle (90° vs. 120°), and product status (obsolete vs. active). Both use identical 2-PLCC packaging and maintain RoHS3 compliance.

Q: Does the VSML3710-GS08 have better environmental specifications?

A: The VSML3710-GS08 offers an extended operating temperature range (-40°C to 85°C) compared to the OP280KT (-25°C to 85°C) and maintains active product status, supporting long-term supply chain continuity.

Q: How do the moisture sensitivity levels differ?

A: The OP280KT has MSL 2A (4 weeks), while the VSML3710-GS08 has MSL 3 (168 hours). This difference affects storage duration and handling procedures; the substitute part requires more frequent reflow processing or desiccant storage management.

Q: Are both parts RoHS and REACH compliant?

A: Yes, both the OP280KT and VSML3710-GS08 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.