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OPB860P51 Equivalent & Substitute Parts
Part Overview
The OPB860P51 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This component is classified as an unamplified optical sensor with a 0.125" (3.18mm) sensing distance, designed for slot-type through-beam detection applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OPB860P51 |
| Manufacturer | TT Electronics/Optek Technology |
| Category | Optical Sensors |
| Sensing Distance | 0.125" (3.18mm) |
| Sensing Method | Through-Beam |
| Output Configuration | Phototransistor |
| Current - DC Forward (If) (Max) | 50 mA |
| Current - Collector (Ic) (Max) | 30 mA |
| Voltage - Collector Emitter Breakdown (Max) | 30 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Chassis Mount |
| Package / Case | Module, Pre-Wired |
| Type | Unamplified |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the OPB860P51 are qualified based on strict electrical and mechanical parameter matching. The critical parameters determining substitutability are:
- Sensing Distance: 0.125" (3.18mm)
- Sensing Method: Through-Beam
- Output Configuration: Phototransistor
- Current - DC Forward (If) (Max): 50 mA
- Current - Collector (Ic) (Max): 30 mA
- Voltage - Collector Emitter Breakdown (Max): 30 V
- Operating Temperature: -40°C ~ 85°C
- Mounting Type: Chassis Mount
- Package / Case: Module, Pre-Wired
- Type: Unamplified
All substitute parts listed maintain identical electrical specifications and mechanical form factors. Substitutes are categorized as either manufacturer-recommended (active product status) or parametric equivalents (functionally identical specifications).
Parameter Comparison
| Part Number | Manufacturer | Product Status | Sensing Distance | Sensing Method | Output Configuration | If (Max) | Ic (Max) | Vce Breakdown (Max) | Operating Temp | Mounting Type | Package | Type | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPB860P51 | TT Electronics/Optek Technology | Obsolete | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB860N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB360N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB365N11 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB365N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB365P55 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB370N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB370N55 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB375N51 | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB380N11Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
| OPB380P51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | Module, Pre-Wired | Unamplified | ROHS3 |
Engineering Selection Recommendations
OPB860N51 is the manufacturer-recommended direct substitute, offering active product status with identical electrical and mechanical specifications. This part is the primary choice for new designs and system replacements.
For applications requiring extended inventory availability, OPB370N55 provides the highest stock level (90,400 units) while maintaining full parameter equivalence. OPB365N51 and OPB370N51 offer substantial inventory (1,916 and 1,250 units respectively) with active product status.
All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original OPB860P51. Chassis mount configuration and pre-wired module packaging remain consistent across all alternatives, supporting direct mechanical and electrical integration into existing designs.
Frequently Asked Questions (FAQ)
Q: Can OPB860N51 be used as a direct replacement for OPB860P51?
A: Yes. OPB860N51 is the manufacturer-recommended substitute with identical electrical specifications (50 mA If max, 30 mA Ic max, 30 V Vce breakdown), identical sensing distance (0.125"), identical sensing method (through-beam), and identical mechanical packaging (chassis mount, pre-wired module). The primary difference is product status: OPB860P51 is obsolete while OPB860N51 is active.
Q: Are all listed substitute parts electrically interchangeable?
A: Yes. All substitute parts maintain identical maximum current ratings (50 mA If, 30 mA Ic), identical voltage breakdown (30 V), identical operating temperature range (-40°C to 85°C), and identical sensing characteristics (0.125" through-beam phototransistor). Electrical interchangeability is complete.
Q: What is the difference between OPB360N51, OPB365N51, OPB370N51, and OPB375N51?
A: These parts are parametric equivalents with identical electrical and mechanical specifications. Differences exist in base product series designation (OPB360, OPB365, OPB370, OPB375) but do not affect functional performance in applications requiring the specified parameters.
Q: Does packaging differ between substitute parts?
A: No. All substitute parts use identical packaging: module, pre-wired configuration with chassis mount. No mechanical redesign or connector modification is required for substitution.
Q: Are compliance certifications maintained across all substitutes?
A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the original OPB860P51 regulatory status.
Q: Which substitute part offers the best inventory availability?
A: OPB370N55 provides the highest stock level at 90,400 units, followed by OPB365N51 at 1,916 units and OPB370N51 at 1,250 units.
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