OPL821-OC Equivalent & Substitute Parts

Part Overview

The OPL821-OC is a 935nm optical sensor with photo detector and logic output functionality, housed in a TO-18 small package with open collector inverter output configuration. Manufactured by TT Electronics/Optek Technology as part of the Photologic® series, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from the same manufacturer are necessary to maintain design compatibility and ensure continued component availability for production and maintenance applications.

Substiute Parts

OPL821-OC

TT Electronics/Optek TechnologyIn Stock: 862OPL821-OC Datasheet

Current PartRFQ

OPL801-OC

TT Electronics/Optek TechnologyIn Stock: 2096OPL801-OC Datasheet

MFR RecommendedRFQ

OPL811-OC

TT Electronics / Optek TechnologyIn Stock: 758OPL811-OC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPL821-OC are qualified based on the following critical parameters that must remain consistent:

• Wavelength: 935nm
• Type: Photo Detector, Logic Output
• Output Type: Open Collector Inverter
• Package / Case: TO-18 small
• Series: Photologic®
• Manufacturer: TT Electronics/Optek Technology
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute parts OPL801-OC and OPL811-OC maintain all critical functional and mechanical parameters. Both are active products with expanded operating temperature ranges, providing improved thermal performance compared to the obsolete OPL821-OC.

Parameter Comparison

Engineering Selection Recommendations

Both OPL801-OC and OPL811-OC are qualified substitutes for the obsolete OPL821-OC. Selection between these two active alternatives should be based on the specific operating temperature requirements of the application:

• OPL801-OC: Supports extended lower temperature operation to -55°C and upper temperature to 110°C
• OPL811-OC: Supports extended lower temperature operation to -55°C and upper temperature to 105°C

Both parts maintain full compliance with ROHS3 and REACH requirements. The transition from the obsolete OPL821-OC to either active substitute ensures continued regulatory compliance and component availability for ongoing production and field replacement applications.

Frequently Asked Questions (FAQ)

Q: Can OPL801-OC and OPL811-OC be used interchangeably with OPL821-OC?

A: Yes. Both substitute parts maintain identical wavelength (935nm), output type (open collector inverter), package configuration (TO-18 small), and series designation (Photologic®). Functional and mechanical compatibility is preserved.

Q: What is the primary difference between OPL801-OC and OPL811-OC?

A: The operating temperature ranges differ slightly. OPL801-OC operates from -55°C to 110°C, while OPL811-OC operates from -55°C to 105°C. Selection depends on the maximum temperature requirement of the application.

Q: Why is the OPL821-OC listed as obsolete?

A: The OPL821-OC has been discontinued by the manufacturer. OPL801-OC and OPL811-OC are the active product alternatives that provide equivalent functionality with expanded operating temperature ranges.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes. Both OPL801-OC and OPL811-OC are ROHS3 compliant and REACH unaffected, maintaining the same regulatory status as the original OPL821-OC.

Q: Is the TO-18 small package identical across all three parts?

A: Yes. All three parts use the TO-18 small package configuration, ensuring mechanical and pin compatibility for direct substitution in existing designs.