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OPB481T11 Equivalent & Substitute Parts
Part Overview
The OPB481T11 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 module wire lead packaging. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components that maintain functional compatibility within the same electrical and mechanical parameter space.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OPB481T11 |
| Manufacturer | TT Electronics/Optek Technology |
| Category | Optical Sensors |
| Series | Photologic® |
| Sensing Distance | 0.125" (3.18mm) |
| Sensing Method | Through-Beam |
| Output Configuration | NPN - Open Collector, Buffer |
| Voltage - Supply | 4.5V ~ 16V |
| Current - Supply | 7.5 mA |
| Response Time | 50ns |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Chassis Mount |
| Package / Case | Module, Wire Leads |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the OPB481T11 is determined by strict alignment across the following critical parameters:
- Sensing distance: 0.125" (3.18mm)
- Sensing method: Through-Beam
- Output configuration: NPN - Open Collector, Buffer
- Supply voltage range: 4.5V ~ 16V
- Supply current: 7.5 mA
- Response time: 50ns
- Operating temperature range: -40°C ~ 85°C
- Mounting type: Chassis Mount
- Package type: Module, Wire Leads
Substitute parts are grouped into two categories:
Direct Equivalents (Same Mounting Type - Chassis Mount, Wire Leads): OPB481T11Z, OPB481L11Z, OPB491T11Z, OPB491L11Z
Functional Alternatives (Different Mounting Type - Through Hole, PCB Mount): OPB461L11, OPB461T11, OPB471L11
Direct equivalents maintain identical mounting and packaging characteristics. Functional alternatives provide the same electrical performance and sensing specifications but require PCB mount integration instead of chassis mount wire lead configuration.
Parameter Comparison
| Part Number | Mounting Type | Package / Case | Sensing Distance | Output Configuration | Voltage - Supply | Current - Supply | Response Time | Operating Temperature | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| OPB481T11 | Chassis Mount | Module, Wire Leads | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Obsolete | RoHS non-compliant |
| OPB481T11Z | Chassis Mount | Module, Wire Leads | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB481L11Z | Chassis Mount | Module, Wire Leads | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB491T11Z | Chassis Mount | Module, Wire Leads | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB491L11Z | Chassis Mount | Module, Wire Leads | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB461L11 | Through Hole | PCB Mount | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB461T11 | Through Hole | PCB Mount | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
| OPB471L11 | Through Hole | PCB Mount | 0.125" (3.18mm) | NPN - Open Collector, Buffer | 4.5V ~ 16V | 7.5 mA | 50ns | -40°C ~ 85°C | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent: OPB481T11Z is the direct active equivalent of OPB481T11. It maintains identical electrical specifications, sensing characteristics, and chassis mount wire lead packaging. OPB481T11Z is ROHS3 compliant and currently in active production status with 1162 units in stock.
Secondary Recommendations - Same Mounting Type: OPB481L11Z, OPB491T11Z, and OPB491L11Z provide functionally equivalent performance within the same chassis mount wire lead package category. All three are ROHS3 compliant and in active production.
Alternative Recommendations - PCB Mount Configuration: OPB461L11, OPB461T11, and OPB471L11 deliver identical electrical and sensing performance but require integration as through-hole PCB mount components. These alternatives are suitable only when circuit board redesign to accommodate PCB mount configuration is feasible. All three are ROHS3 compliant and in active production.
The original OPB481T11 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can OPB481T11Z be used as a direct replacement for OPB481T11?
A: Yes. OPB481T11Z is a direct equivalent with identical electrical specifications, sensing distance, output configuration, and chassis mount wire lead packaging. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).
Q: What is the difference between OPB481L11Z and OPB481T11Z?
A: Both parts share identical electrical and sensing specifications and are housed in the same chassis mount wire lead package. The designation difference (L vs. T) reflects internal design variants within the OPB481 base product line, but both maintain full functional equivalence for the OPB481T11 application.
Q: Can PCB mount versions (OPB461L11, OPB461T11, OPB471L11) replace the OPB481T11?
A: PCB mount versions are functionally equivalent in terms of electrical performance and sensing characteristics but differ in mounting type. They require through-hole PCB integration rather than chassis mount wire lead connection. Selection depends on whether circuit board redesign is acceptable for your application.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed (OPB481T11Z, OPB481L11Z, OPB491T11Z, OPB491L11Z, OPB461L11, OPB461T11, OPB471L11) are ROHS3 compliant. The original OPB481T11 is RoHS non-compliant.
Q: What determines whether a part can substitute for OPB481T11?
A: Substitution eligibility is determined by matching sensing distance (0.125"), sensing method (through-beam), output configuration (NPN open collector buffer), supply voltage (4.5V-16V), supply current (7.5 mA), response time (50ns), and operating temperature range (-40°C to 85°C). Mounting type and package determine whether substitution requires hardware redesign.
Q: Which substitute part has the highest inventory availability?
A: OPB481L11Z has the highest inventory with 3099 units in stock, followed by OPB481T11Z with 1162 units.
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