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OPB933L55 Equivalent & Substitute Parts
Part Overview
The OPB933L55 is a through-beam optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This component features a 0.125" (3.18mm) sensing distance with PCB mount configuration and NPN open collector inverted output. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Active alternatives within the same electrical and mechanical specifications are available to ensure design continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OPB933L55 |
| Manufacturer | TT Electronics/Optek Technology |
| Category | Optical Sensors |
| Series | Photologic® |
| Product Status | Obsolete |
| Sensing Distance | 0.125" (3.18mm) |
| Sensing Method | Through-Beam |
| Output Configuration | NPN - Open Collector, Inverted |
| Mounting Type | Through Hole |
| Current - Supply | 15 mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Response Time | 70ns |
| Operating Temperature | -40°C ~ 70°C |
| Package / Case | PCB Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution eligibility for the OPB933L55 is determined by strict equivalence across the following critical parameters:
- Sensing Distance: 0.125" (3.18mm)
- Sensing Method: Through-Beam
- Output Configuration: NPN - Open Collector, Inverted
- Mounting Type: Through Hole
- Current - Supply: 15 mA
- Voltage - Supply: 4.75V ~ 5.25V
- Response Time: 70ns
- Operating Temperature: -40°C ~ 70°C
- Package / Case: PCB Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
All substitute parts listed maintain identical electrical performance characteristics and mechanical compatibility. The primary distinction between the OPB933L55 and its substitutes lies in product status (active vs. obsolete) and base product series designation (OPB933, OPB963, or OPB973). Parts sharing the same base product number (OPB963 or OPB973 series) are direct functional equivalents with active manufacturing status.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Distance | Sensing Method | Output Configuration | Mounting Type | Current - Supply | Voltage - Supply | Response Time | Operating Temperature | Package / Case | RoHS Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPB933L55 | TT Electronics/Optek Technology | Obsolete | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 773 |
| OPB933W55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Chassis Mount | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | Module, Wire Leads | ROHS3 Compliant | 1243 |
| OPB963N11 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 926 |
| OPB963N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 2795 |
| OPB963P51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 997 |
| OPB963T11 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 661 |
| OPB963T51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 1011 |
| OPB963T55 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 1444 |
| OPB973L51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 695 |
| OPB973N11 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 1238 |
| OPB973N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | NPN - Open Collector, Inverted | Through Hole | 15 mA | 4.75V ~ 5.25V | 70ns | -40°C ~ 70°C | PCB Mount | ROHS3 Compliant | 6130 |
Engineering Selection Recommendations
For applications currently using the obsolete OPB933L55, direct PCB mount substitutes from the active OPB963 and OPB973 series provide identical electrical and mechanical performance. All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.
The OPB963 series (OPB963N11, OPB963N51, OPB963P51, OPB963T11, OPB963T51, OPB963T55) and OPB973 series (OPB973L51, OPB973N11, OPB973N51) are functionally equivalent alternatives with active product status and established supply availability.
The OPB933W55Z variant offers an alternative form factor with module and wire lead configuration instead of PCB mount, suitable for applications requiring chassis mount installation rather than through-hole PCB mounting.
Frequently Asked Questions (FAQ)
Q: Can OPB963 and OPB973 series parts be used interchangeably with the OPB933L55?
A: Yes. All OPB963 and OPB973 series parts listed maintain identical electrical specifications (15 mA supply current, 4.75V–5.25V supply voltage, 70ns response time, NPN open collector inverted output) and mechanical compatibility (0.125" sensing distance, through-beam sensing method, PCB mount through-hole configuration, -40°C to 70°C operating temperature range).
Q: What is the difference between OPB963 and OPB973 base series?
A: The base product series designation (OPB963 vs. OPB973) represents different product lines within the Photologic® family. Both series maintain identical electrical and mechanical parameters specified for the OPB933L55. Selection between series is based on availability and supply chain considerations.
Q: Why is OPB933W55Z listed as a substitute if it has different mounting?
A: OPB933W55Z shares the same electrical specifications and sensing characteristics as the OPB933L55 but uses chassis mount with wire leads instead of PCB mount through-hole configuration. This part is suitable only for applications where the mounting method can be adapted to accommodate module and wire lead installation.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory status of the OPB933L55.
Q: Which substitute part has the highest inventory availability?
A: OPB973N51 has the highest inventory with 6130 pieces in stock, followed by OPB963N51 with 2795 pieces.
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