OP166W Infrared Emitter - Equivalent & Substitute Parts

Part Overview

The OP166W is a T-1 package infrared emitter operating at 935nm wavelength, designed for applications requiring near-infrared light emission. Manufactured by TT Electronics/Optek Technology, this component delivers 50mA maximum forward current with a 1.6V typical forward voltage and 90° viewing angle. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

OP166W

TT Electronics/Optek TechnologyIn Stock: 1148OP166W Datasheet

Current PartRFQ

OP266W

TT Electronics/Optek TechnologyIn Stock: 3934OP266W Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP166W is determined by the following critical parameters:

• Package Type: T-1 through-hole package ensures mechanical and electrical compatibility with existing PCB layouts
• Mounting Configuration: Through-hole orientation maintains identical board-level integration
• Maximum Forward Current: 50mA rating must be maintained or exceeded to ensure circuit compatibility
• Viewing Angle: 90° specification preserves optical field characteristics
• Operating Temperature Range: -40°C ~ 100°C compatibility ensures thermal envelope alignment
• Wavelength Compatibility: Near-infrared spectrum operation within acceptable tolerance for the application

The OP266W qualifies as a substitute based on matching package, mounting type, current rating, viewing angle, temperature range, and near-infrared spectrum operation. Wavelength difference (890nm vs 935nm) represents a shift within the near-infrared band and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The OP266W is the manufacturer-recommended substitute for the obsolete OP166W. Both components maintain identical package, mounting configuration, maximum forward current, and viewing angle specifications. The OP266W is currently in active production status, ensuring long-term availability and supply chain continuity.

Key considerations for selection:

• Wavelength Shift: The OP266W operates at 890nm compared to the OP166W's 935nm. This 45nm difference within the near-infrared spectrum requires validation against receiver sensor specifications and application-specific wavelength requirements.
• Forward Voltage: The OP266W exhibits a 0.2V higher typical forward voltage (1.8V vs 1.6V). Circuit designs must accommodate this voltage differential in current-limiting resistor calculations and power supply headroom analysis.
• Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system support.
• Availability: The OP266W's active product status provides immediate procurement access and sustained manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the OP266W directly replace the OP166W in existing designs?

A: Mechanical and electrical compatibility is established through matching T-1 package, through-hole mounting, 50mA current rating, and 90° viewing angle. However, the 45nm wavelength difference (890nm vs 935nm) and 0.2V forward voltage increase require validation against the specific application's receiver sensor wavelength response and circuit power supply design.

Q: What is the significance of the wavelength difference between 935nm and 890nm?

A: Both wavelengths operate within the near-infrared spectrum. The OP266W's 890nm wavelength may exhibit different absorption characteristics in specific materials and different spectral response in receiver photodiodes. Application-specific testing is necessary to confirm compatibility with the intended receiver component.

Q: How does the forward voltage difference affect circuit design?

A: The OP266W's 1.8V typical forward voltage compared to the OP166W's 1.6V requires recalculation of series current-limiting resistor values to maintain the desired forward current. The 0.2V difference may also impact power supply headroom in current-limited designs.

Q: Are both components available in the same packaging options?

A: Both the OP166W and OP266W are supplied in T-1 through-hole packages. The OP266W is available in bulk packaging, while the OP166W is obsolete. Packaging format compatibility ensures identical PCB integration.

Q: What compliance certifications apply to both components?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use in regulated markets.