OP299 Infrared Emitter 890nm Equivalent & Substitute Parts

Part Overview

The OP299 is an infrared (IR) emitter manufactured by TT Electronics/Optek Technology, designed for applications requiring 890nm wavelength emission at 100mA forward current. This through-hole T 1 3/4 package component operates across -40°C to 100°C and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, application-specific wavelength requirements, or design optimization needs.

Substiute Parts

OP299

TT Electronics/Optek TechnologyIn Stock: 748OP299 Datasheet

Current PartRFQ

LTE-4208

LITEONIn Stock: 11880LTE-4208 Datasheet

MFR RecommendedRFQ

XTHI12BF

SunLEDIn Stock: 1229XTHI12BF Datasheet

MFR RecommendedRFQ

XTHI12W

SunLEDIn Stock: 1848XTHI12W Datasheet

MFR RecommendedRFQ

XTNI12BF

SunLEDIn Stock: 1884XTNI12BF Datasheet

MFR RecommendedRFQ

XTNI12W

SunLEDIn Stock: 8222XTNI12W Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OP299 is determined by the following critical parameters: infrared emitter type, wavelength range (890nm primary specification), viewing angle (20°), through-hole mounting compatibility, and T 1 3/4 package form factor. The forward current rating (100mA) and forward voltage (1.5V) establish the electrical operating envelope.

Identified substitutes fall into two categories:

Category 1: T 1 3/4 Package Compatibility (Direct Package Match)

• LTE-4208 (LITEON): 940nm wavelength, 50mA maximum current, 1.2V forward voltage, T 1 3/4 package, 20° viewing angle

Category 2: Radial Package Alternatives (Package Variation)

• XTHI12W and XTHI12BF (SunLED): 880nm wavelength, 50mA maximum current, 1.3V forward voltage, radial package, 20° viewing angle
• XTNI12W and XTNI12BF (SunLED): 940nm wavelength, 50mA maximum current, 1.2V forward voltage, radial package, 20° viewing angle

All substitute parts maintain 20° viewing angle, through-hole mounting, RoHS3 compliance, and -40°C to 85°C operating temperature range (except OP299 which extends to 100°C).

Parameter Comparison

Engineering Selection Recommendations

For T 1 3/4 Package Requirement: LTE-4208 is the only substitute maintaining the original T 1 3/4 package form factor. This part is suitable for applications where PCB footprint compatibility is mandatory. Note that LTE-4208 operates at reduced maximum current (50mA versus 100mA) and operates to 85°C maximum temperature versus the OP299's 100°C upper limit.

For Radial Package Applications: XTHI12W, XTHI12BF, XTNI12W, and XTNI12BF are available as radial package alternatives. These parts require PCB layout modification to accommodate radial lead geometry. All radial substitutes are rated to 50mA maximum current and 85°C maximum operating temperature.

All identified substitutes maintain RoHS3 compliance and active product status, ensuring regulatory compliance and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can LTE-4208 directly replace OP299 in existing designs? A: LTE-4208 maintains T 1 3/4 package compatibility and identical 20° viewing angle. However, the reduced maximum current rating (50mA versus 100mA) and lower maximum operating temperature (85°C versus 100°C) must be evaluated against application requirements. Forward voltage differs (1.2V versus 1.5V), requiring circuit verification.

Q: What is the primary difference between 880nm, 890nm, and 940nm wavelengths? A: Wavelength selection depends on application-specific sensor compatibility and optical filtering requirements. The OP299 specifies 890nm; substitutes offer 880nm or 940nm alternatives. Wavelength selection must align with receiver photodiode sensitivity curves.

Q: Are radial package substitutes mechanically compatible with T 1 3/4 footprints? A: No. Radial packages (XTHI12W, XTHI12BF, XTNI12W, XTNI12BF) require different PCB hole patterns and cannot be directly substituted into T 1 3/4 through-hole layouts without board redesign.

Q: What is the impact of reduced current rating on radiant intensity? A: All substitute parts are rated at 50mA maximum current versus OP299's 100mA. Radiant intensity specifications are provided at rated current levels. Application circuits must be designed within the substitute part's current envelope.

Q: Do all substitutes maintain the same operating temperature range? A: No. OP299 operates to 100°C; all identified substitutes operate to 85°C maximum. Applications requiring operation above 85°C cannot use these substitutes.