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OP292C Infrared Emitter - Equivalent & Substitute Parts
Part Overview
The OP292C is an infrared (IR) emitter manufactured by TT Electronics/Optek Technology, designed for applications requiring 890nm wavelength emission at 150mA forward current. This component operates at a forward voltage of 1.75V with a 50° viewing angle in a T 1 3/4 through-hole package. The OP292C is classified as obsolete, necessitating identification of active substitute components to maintain design continuity and ensure supply chain availability for new production and legacy system support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OP292C |
| Manufacturer | TT Electronics/Optek Technology |
| Type | Infrared (IR) Emitter |
| Wavelength | 890nm |
| Forward Voltage (Vf) | 1.75V |
| Forward Current (If Max) | 150mA |
| Viewing Angle | 50° |
| Package / Case | T 1 3/4 |
| Mounting Type | Through Hole |
| Operating Temperature | -40°C ~ 100°C |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the OP292C requires evaluation based on the following critical parameters: wavelength (890nm), forward current capability (150mA), forward voltage (1.75V), viewing angle (50°), package type (T 1 3/4), and mounting configuration (through hole).
The substitute parts identified fall into two categories based on electrical and mechanical compatibility:
Category 1 - Direct Wavelength Match (890nm):
- OP292A: Identical electrical specifications and package configuration to the OP292C, with active product status
Category 2 - Alternative Wavelength (940nm):
- IR333/H0 and LTE-3271B: Operate at 940nm wavelength with reduced forward current ratings (100mA) and different package configurations (radial), representing functional alternatives where wavelength shift is acceptable
Parameter Comparison
| Parameter | OP292C (Main) | OP292A | IR333/H0 | LTE-3271B |
|---|---|---|---|---|
| Manufacturer | TT Electronics/Optek | TT Electronics/Optek | Everlight Electronics | Lite-On Inc. |
| Type | IR Emitter | IR Emitter | IR Emitter | IR Emitter |
| Wavelength | 890nm | 890nm | 940nm | 940nm |
| Forward Voltage (Vf) | 1.75V | 1.75V | 1.2V, 1.4V | 1.25V |
| Forward Current (If Max) | 150mA | 150mA | 100mA | 100mA |
| Viewing Angle | 50° | 50° | 40° | 50° |
| Package / Case | T 1 3/4 | T 1 3/4 | Radial | Radial |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Operating Temperature | -40°C ~ 100°C | -40°C ~ 100°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Product Status | Obsolete | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Not specified | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute: OP292A
The OP292A is the recommended substitute for the obsolete OP292C. Both components are manufactured by TT Electronics/Optek Technology and share identical electrical and mechanical specifications: 890nm wavelength, 1.75V forward voltage, 150mA maximum forward current, 50° viewing angle, and T 1 3/4 package configuration. The OP292A maintains active product status and ROHS3 compliance, ensuring long-term supply availability and regulatory alignment.
Alternative Substitutes: IR333/H0 and LTE-3271B
The IR333/H0 (Everlight Electronics) and LTE-3271B (Lite-On Inc.) are functional alternatives where application requirements permit wavelength deviation to 940nm. Both components operate at reduced forward current (100mA versus 150mA) and employ radial package configurations rather than T 1 3/4. The LTE-3271B maintains ROHS3 compliance and the same 50° viewing angle as the OP292C. These alternatives are suitable only for designs where the 890nm to 940nm wavelength shift does not compromise system performance or detector compatibility.
Frequently Asked Questions (FAQ)
Q: Can the OP292A directly replace the OP292C without circuit modifications?
A: Yes. The OP292A is electrically and mechanically identical to the OP292C, requiring no circuit or PCB layout changes. Both components operate at 1.75V forward voltage, 150mA maximum current, and use the T 1 3/4 package.
Q: What are the key differences between the OP292C and the 940nm alternatives?
A: The primary differences are wavelength (890nm versus 940nm), forward current capability (150mA versus 100mA), and package type (T 1 3/4 versus radial). The 940nm alternatives also operate at lower forward voltages (1.2V-1.4V) and reduced maximum operating temperature (85°C versus 100°C).
Q: Can IR333/H0 or LTE-3271B be used in applications designed for the OP292C?
A: Substitution is possible only if the application's detector or receiver is compatible with 940nm wavelength emission. The reduced forward current rating (100mA) may also require circuit design review. The radial package configuration requires different PCB footprint and mounting considerations compared to the T 1 3/4 package.
Q: What is the operating temperature range difference between the OP292C and substitute parts?
A: The OP292C and OP292A operate across -40°C to 100°C. The IR333/H0 and LTE-3271B are rated for -40°C to 85°C, representing a 15°C reduction in maximum operating temperature.
Q: Are all substitute parts RoHS compliant?
A: The OP292A and LTE-3271B are ROHS3 compliant. The IR333/H0 RoHS status is not specified in available documentation.
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