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OPB993L51 Equivalent & Substitute Parts
Part Overview
The OPB993L51 is an optical sensor manufactured by TT Electronics/Optek Technology, classified as a through-beam photoelectric sensor in the Photologic® series. This component is designed for 0.125" (3.18mm) sensing distance applications with NPN open collector inverted output configuration and wire lead packaging for chassis mount installation.
The OPB993L51 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this sensor.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Sensing Distance | 0.125" (3.18mm) |
| Sensing Method | Through-Beam |
| Output Configuration | NPN - Open Collector, Inverted |
| 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 OPB993L51 are qualified based on electrical and mechanical parameter equivalence across the following critical criteria:
- Sensing Distance: 0.125" (3.18mm) through-beam configuration
- Output Configuration: NPN open collector inverted logic
- Supply Specifications: 4.75V ~ 5.25V operating range, 15 mA supply current
- Response Time: 70ns switching speed
- Operating Temperature Range: -40°C ~ 70°C
- Package Type: Module with wire leads, chassis mount
- Series Compatibility: Photologic® optical sensor family
All substitute parts listed maintain identical electrical performance characteristics and mechanical form factors. Substitutes differ only in base product designation (OPB933, OPB943, OPB983, OPB993 series variants) and packaging configuration (bulk vs. standard), with active product status and RoHS3 compliance providing improved supply availability and regulatory alignment compared to the obsolete OPB993L51.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Distance | Output Configuration | Supply Voltage | Supply Current | Response Time | Operating Temperature | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| OPB993L51 | TT Electronics/Optek Technology | Obsolete | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | RoHS non-compliant | 785 Pcs |
| OPB933W51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 3489 Pcs |
| OPB933W55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1243 Pcs |
| OPB943W51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1180 Pcs |
| OPB983L11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 896 Pcs |
| OPB983L51Z | TT Electronics / Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1900 Pcs |
| OPB983P11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 998 Pcs |
| OPB983P51Z | TT Electronics / Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 2108 Pcs |
| OPB983T51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 20199 Pcs |
| OPB993L11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 1716 Pcs |
| OPB993L55Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | NPN - Open Collector, Inverted | 4.75V ~ 5.25V | 15 mA | 70ns | -40°C ~ 70°C | ROHS3 Compliant | 722 Pcs |
Engineering Selection Recommendations
All listed substitute parts maintain full electrical and mechanical compatibility with the OPB993L51 across the specified parameter set. Selection among substitutes should prioritize the following factors:
Product Status and Compliance: All substitute parts carry active product status with ROHS3 compliance certification, providing regulatory alignment and assured long-term supply availability compared to the obsolete OPB993L51 designation.
Supply Availability: OPB983T51Z offers the highest inventory level at 20,199 units, followed by OPB933W51Z at 3,489 units. These options provide optimal supply chain security for volume production or extended deployment scenarios.
Base Product Series: OPB933, OPB943, OPB983, and OPB993 series variants are functionally interchangeable within the Photologic® family. Selection between series does not impact electrical performance or mechanical fit.
Packaging Configuration: All substitutes are supplied in bulk packaging with identical module and wire lead form factors. No design modifications are required for direct substitution.
Frequently Asked Questions (FAQ)
Q: Can OPB983T51Z directly replace OPB993L51 in existing designs?
A: Yes. OPB983T51Z maintains identical electrical specifications (4.75V ~ 5.25V supply, 15 mA current, 70ns response time, NPN open collector inverted output) and mechanical form factor (module with wire leads, chassis mount). No circuit modifications are required.
Q: What is the difference between OPB933, OPB943, OPB983, and OPB993 series designations?
A: These designations identify different base product lines within the Photologic® optical sensor family. All variants listed maintain identical electrical performance and mechanical compatibility for the specified 0.125" (3.18mm) through-beam sensing application. Series selection does not affect functional performance.
Q: Why is OPB993L51 listed as obsolete?
A: OPB993L51 carries RoHS non-compliant status and is no longer actively manufactured. Active substitutes with ROHS3 compliance provide regulatory alignment and assured supply continuity.
Q: Are there differences in packaging between substitute parts?
A: All substitute parts are supplied in bulk packaging with identical module and wire lead configurations. No mechanical or electrical differences exist between packaging variants for the specified application.
Q: What is the significance of the suffix codes (L, P, T, W) in part numbers?
A: Suffix codes identify specific product variants within the Photologic® series. All variants listed maintain the specified electrical and mechanical parameters for 0.125" (3.18mm) through-beam sensing with NPN open collector inverted output.
Q: Can multiple substitute parts be used interchangeably in the same system?
A: Yes. All listed substitutes maintain identical electrical specifications and mechanical form factors. Multiple part numbers can be used interchangeably without design modifications or performance impact.
Q: What is the operating temperature range for all substitute parts?
A: All substitute parts operate across -40°C ~ 70°C, matching the OPB993L51 specification. No thermal performance differences exist between substitutes.
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