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OPB990L55 Equivalent & Substitute Parts
Part Overview
The OPB990L55 is an optical sensor from TT Electronics/Optek Technology's Photologic® series, designed as a through-beam sensor with 0.125" (3.18mm) sensing distance and wire lead connections. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The OPB990L55 operates with totem pole buffer output configuration, suitable for chassis mount applications requiring 4.75V to 5.25V supply voltage and 15 mA current draw.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Sensing Distance | 0.125" (3.18mm) |
| Sensing Method | Through-Beam |
| Output Configuration | Totem Pole, Buffer |
| Mounting Type | Chassis Mount |
| Current - Supply | 15 mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Response Time | 70ns |
| Operating Temperature | -40°C ~ 70°C |
| Package / Case | Module, Wire Leads |
| Series | Photologic® |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the OPB990L55 are qualified based on strict electrical and mechanical parameter matching across the Photologic® series. All substitute candidates maintain identical specifications for sensing distance (0.125" / 3.18mm), sensing method (through-beam), output configuration (totem pole buffer), mounting type (chassis mount), supply voltage (4.75V ~ 5.25V), supply current (15 mA), response time (70ns), operating temperature range (-40°C ~ 70°C), and package type (module with wire leads).
The primary distinction between the OPB990L55 and its substitutes lies in product status and compliance certifications. The OPB990L55 is obsolete and RoHS non-compliant, whereas all qualified substitutes are active products with ROHS3 compliance. This substitution strategy ensures functional equivalence while providing access to actively manufactured, compliant alternatives.
Key parameters determining substitution eligibility:
- Sensing distance: 0.125" (3.18mm)
- Sensing method: Through-beam
- Output configuration: Totem pole, buffer
- Supply voltage range: 4.75V ~ 5.25V
- Supply current: 15 mA
- Response time: 70ns
- Operating temperature: -40°C ~ 70°C
- Package type: Module, wire leads
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Distance | Sensing Method | Output Configuration | Supply Voltage | Supply Current | Response Time | Operating Temperature | RoHS Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| OPB990L55 | TT Electronics/Optek Technology | Obsolete | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | RoHS non-compliant | 968 |
| OPB990L55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1407 |
| OPB930W51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 2332 |
| OPB940W51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 2247 |
| OPB940W55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1300 |
| OPB980L11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1101 |
| OPB980L51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1063 |
| OPB980L55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 20399 |
| OPB980P11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1055 |
| OPB980P51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 2412 |
| OPB980P55Z | TT Electronics / Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Totem Pole, Buffer | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 995 |
Engineering Selection Recommendations
All listed substitute parts maintain functional equivalence to the OPB990L55 across all critical electrical and mechanical parameters. Selection among substitutes should prioritize active product status and ROHS3 compliance, both of which are satisfied by all candidates presented.
OPB980L55Z offers the highest inventory availability (20,399 units) among active substitutes, providing supply chain stability for high-volume applications. OPB990L55Z represents the closest direct equivalent, maintaining the same base product number (OPB990) while upgrading to active status and ROHS3 compliance.
All substitute parts carry identical REACH unaffected status and ECCN/HTSUS classifications as the original OPB990L55, ensuring regulatory consistency across procurement and export documentation.
Frequently Asked Questions (FAQ)
Q: Can OPB980L55Z directly replace OPB990L55 in existing designs?
A: Yes. Both parts maintain identical electrical specifications (4.75V ~ 5.25V supply, 15 mA current, 70ns response time), sensing distance (0.125" / 3.18mm), sensing method (through-beam), output configuration (totem pole buffer), and operating temperature range (-40°C ~ 70°C). The primary difference is product status and compliance certification.
Q: What is the significance of the "Z" suffix in substitute part numbers?
A: The "Z" suffix indicates bulk packaging and active product status with current manufacturing support and ROHS3 compliance, distinguishing these parts from the obsolete OPB990L55.
Q: Are all substitute parts available in the same wire lead package configuration?
A: Yes. All substitute parts use the module with wire leads package type, maintaining mechanical compatibility with OPB990L55 mounting and connection requirements.
Q: Why are there multiple OPB980 variants (L11Z, L51Z, L55Z, P11Z, P51Z, P55Z)?
A: These variants represent different configurations within the OPB980 base product line. All maintain identical electrical and sensing specifications required for OPB990L55 substitution. Selection among OPB980 variants depends on specific application requirements beyond the core substitution parameters.
Q: Is ROHS3 compliance required for OPB990L55 replacement?
A: All active substitute parts listed are ROHS3 compliant. If legacy RoHS non-compliant designs are required, only the obsolete OPB990L55 meets that specification. For new designs and ongoing support, ROHS3 compliant substitutes are the appropriate selection.
Q: Do substitute parts maintain the same REACH and export classification status?
A: Yes. All substitute parts carry identical REACH unaffected status and ECCN/HTSUS classifications (EAR99 / 8541.49.8000) as the original OPB990L55.
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