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OPB877P55 Equivalent & Substitute Parts
Part Overview
The OPB877P55 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This component features a 0.125" (3.18mm) sensing distance with pre-wired chassis mount packaging and unamplified phototransistor output configuration. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this sensor category.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OPB877P55 |
| 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 |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the OPB877P55 is determined by strict equivalence across the following critical parameters:
- 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
- Type: Unamplified
- RoHS Status: ROHS3 Compliant
Substitute parts are categorized into two groups: the manufacturer-recommended direct substitute (OPB877T55) and parametric equivalents that maintain identical electrical and functional specifications while differing in mounting configuration or product status.
Parameter Comparison
| Parameter | OPB877P55 | OPB877T55 | OPB360N51 | OPB365N11 | OPB365N51 | OPB365P55 | OPB370N51 | OPB370N55 | OPB375N51 | OPB380N11Z | OPB380P51Z |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology | TT Electronics/Optek Technology |
| Sensing Distance | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) | 0.125" (3.18mm) |
| Sensing Method | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam | Through-Beam |
| Output Configuration | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor |
| Current - DC Forward (If) (Max) | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA |
| Current - Collector (Ic) (Max) | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA |
| Voltage - Collector Emitter Breakdown (Max) | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V | 30 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Chassis Mount | Through Hole | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount |
| Package / Case | Module, Pre-Wired | PCB Mount | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired | Module, Pre-Wired |
| Type | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified | Unamplified |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
OPB877T55 is the manufacturer-recommended direct substitute. This part maintains identical electrical specifications and pre-wired module configuration while transitioning from chassis mount to through-hole PCB mount packaging. Product status is active, ensuring long-term availability and supply chain stability.
OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are parametric equivalents. All maintain identical electrical performance across sensing distance, output configuration, current ratings, voltage ratings, and operating temperature range. All parts are ROHS3 compliant with active product status. Selection among these equivalents depends on mechanical integration requirements and specific connector or wiring configurations defined by the application.
Frequently Asked Questions (FAQ)
Q: Can OPB877T55 directly replace OPB877P55 in existing designs?
A: OPB877T55 maintains all electrical specifications of OPB877P55 but differs in mounting type (through-hole PCB mount versus chassis mount). Mechanical integration must be evaluated for your specific application. Electrical performance is identical.
Q: What distinguishes the parametric equivalents from OPB877T55?
A: All parametric equivalents (OPB360N51, OPB365 series, OPB370 series, OPB375N51, OPB380 series) maintain identical electrical and functional specifications. Differences exist only in base product number and internal connector/wiring configurations. Selection is based on mechanical compatibility with your system.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of OPB877P55.
Q: Why is OPB877P55 listed as obsolete?
A: OPB877P55 is obsolete. All substitute parts listed carry active product status, ensuring continued availability for new designs and system support.
Q: What are the critical parameters for substitution?
A: Substitution is valid when the following parameters match: 0.125" (3.18mm) sensing distance, through-beam sensing method, phototransistor output, 50 mA maximum forward current, 30 mA maximum collector current, 30 V maximum collector-emitter breakdown voltage, -40°C to 85°C operating temperature range, and unamplified sensor type.
Q: Does mounting type affect electrical performance?
A: No. Mounting type (chassis mount, through-hole, or pre-wired configuration) affects mechanical integration only. Electrical performance remains identical across all substitute parts.
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