Request Quote
(Ships tomorrow)
OPB891P51Z Equivalent & Substitute Parts
Part Overview
The OPB891P51Z 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 functional specification.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | OPB891P51Z |
| 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
Substitution for the OPB891P51Z 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
- REACH Status: REACH Unaffected
Substitute parts are grouped into two categories: MFR Recommended (mounting configuration change) and Parametric Equivalents (identical electrical and functional specifications with active product status).
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 / Case | Type | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPB891P51Z | 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 Compliant | 1019 Pcs |
| OPB891T51Z | TT Electronics/Optek Technology | Active | 0.125" (3.18mm) | Through-Beam | Phototransistor | 50 mA | 30 mA | 30 V | -40°C ~ 85°C | Chassis Mount | PCB Mount | Unamplified | ROHS3 Compliant | 1420 Pcs |
| 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 Compliant | 1394 Pcs |
| 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 Compliant | 658 Pcs |
| 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 Compliant | 1916 Pcs |
| 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 Compliant | 1052 Pcs |
| 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 Compliant | 1250 Pcs |
| 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 Compliant | 90400 Pcs |
| 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 Compliant | 648 Pcs |
| 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 Compliant | 1100 Pcs |
| 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 Compliant | 651 Pcs |
Engineering Selection Recommendations
All listed substitute parts maintain full electrical and functional equivalence to the OPB891P51Z across all critical parameters. All substitute parts carry Active product status, ensuring long-term availability and manufacturing support. All parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.
OPB891T51Z differs only in mounting configuration (PCB Mount versus Pre-Wired Module), suitable for applications where direct PCB integration is preferred over chassis mounting.
OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are parametric equivalents with identical electrical specifications and pre-wired module packaging. These parts represent different product lines within the OPB series, all manufactured by TT Electronics/Optek Technology with equivalent performance characteristics.
OPB370N55 offers the highest inventory availability at 90,400 pieces, providing supply chain stability for high-volume applications.
Frequently Asked Questions (FAQ)
Q: Can OPB891T51Z replace OPB891P51Z in existing designs?
A: OPB891T51Z is electrically equivalent but differs in mounting type. OPB891T51Z is PCB Mount, while OPB891P51Z is pre-wired chassis mount. Substitution requires mechanical redesign to accommodate the different mounting interface.
Q: Are all substitute parts interchangeable with OPB891P51Z?
A: All listed substitute parts maintain identical electrical specifications, sensing distance, output configuration, and operating temperature range. Mechanical compatibility depends on mounting type. Pre-wired module variants (OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, OPB380P51Z) are directly compatible with chassis mount applications. PCB Mount variant (OPB891T51Z) requires mechanical redesign.
Q: Why is OPB891P51Z obsolete while substitutes are active?
A: OPB891P51Z has been discontinued by the manufacturer. Equivalent active products from the same manufacturer provide identical functionality with ongoing production and support.
Q: What compliance certifications apply to all substitute parts?
A: All substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards equivalent to the original OPB891P51Z.
Q: Which substitute part offers the best supply availability?
A: OPB370N55 maintains the highest inventory level at 90,400 pieces, providing optimal supply chain reliability for production applications.
Q: Are there differences in electrical performance between the substitute parts?
A: No. All substitute parts share identical electrical specifications: 50 mA maximum DC forward current, 30 mA maximum collector current, 30 V maximum collector-emitter breakdown voltage, and -40°C to 85°C operating temperature range.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts