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TLP781(BLL-TP6,F) Equivalent & Substitute Parts
Part Overview
The TLP781(BLL-TP6,F) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation in a 4-SMD surface mount package. The part is currently obsolete, making identification of equivalent and substitute components essential for ongoing design support, maintenance, and production continuity. Active alternatives from Toshiba and other manufacturers maintain identical electrical and mechanical specifications, enabling direct replacement in existing applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Toshiba Semiconductor and Storage |
| Part Number | TLP781(BLL-TP6,F) |
| Category | Optoisolators |
| Product Status | Obsolete |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA |
| Current Transfer Ratio (Max) | 400% @ 5mA |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Operating Temperature | -55°C ~ 110°C |
| Package / Case | 4-SMD, Gull Wing |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the TLP781(BLL-TP6,F) is determined by strict equivalence across the following critical parameters:
- Isolation Voltage: 5000Vrms (mandatory match)
- Number of Channels: 1 channel (mandatory match)
- Output Type: Transistor output (mandatory match)
- Current Transfer Ratio: 200% to 400% @ 5mA (mandatory match)
- Maximum Output Voltage: 80V (mandatory match)
- Maximum Output Current: 50mA per channel (mandatory match)
- Operating Temperature Range: -55°C to 110°C (mandatory match)
- Package Configuration: 4-SMD, Gull Wing surface mount (mandatory match)
Substitute parts are classified into two categories:
Direct Manufacturer Equivalent: TLP785(BLL-TP6,F) from Toshiba maintains identical specifications with active product status.
Parametric Equivalents: Everlight Electronics EL816 and EL817 series variants meet all electrical and mechanical requirements. These components are available in multiple package code variants (TD, TU, with and without -V suffix) and alternative input configurations (S, S1). All variants maintain the core electrical parameters required for substitution.
Parameter Comparison
| Parameter | TLP781(BLL-TP6,F) | TLP785(BLL-TP6,F) | EL816 Series | EL817 Series |
|---|---|---|---|---|
| Manufacturer | Toshiba | Toshiba | Everlight | Everlight |
| Product Status | Obsolete | Active | Active | Active |
| Number of Channels | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA | 200% @ 5mA | 200% @ 5mA | 200% @ 5mA |
| Current Transfer Ratio (Max) | 400% @ 5mA | 400% @ 5mA | 400% @ 5mA | 400% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | 3µs, 3µs | Not specified | Not specified |
| Rise / Fall Time (Typ) | 2µs, 3µs | 2µs, 3µs | 4µs, 3µs | 6µs, 8µs |
| Output Type | Transistor | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 80V | 80V | 80V | 80V |
| Current - Output / Channel | 50mA | 50mA | 50mA | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V | 1.15V | 1.2V | 1.2V |
| Current - DC Forward (If) (Max) | 60mA | 60mA | 60mA | 60mA |
| Vce Saturation (Max) | 400mV | 400mV | 200mV | 200mV |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C |
| Package / Case | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| RoHS Status | Not specified | Not specified | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: TLP785(BLL-TP6,F) from Toshiba is the direct equivalent with active product status. This part maintains identical electrical specifications and package configuration, ensuring seamless integration into existing designs without circuit modification.
Secondary Recommendations: Everlight Electronics EL816 and EL817 series optoisolators are parametric equivalents meeting all core electrical and mechanical requirements. These components are available in multiple variants and carry ROHS3 compliance certification. The EL816 series maintains timing characteristics closer to the original TLP781, while the EL817 series exhibits slightly slower rise and fall times (6µs and 8µs respectively). Both series are suitable for applications where the specified timing parameters are within acceptable design margins.
Selection between EL816 and EL817 variants depends on application-specific timing requirements. The EL816 series is preferred for applications requiring faster switching response. The EL817 series is suitable for applications with relaxed timing constraints.
Frequently Asked Questions (FAQ)
Q: Can TLP785(BLL-TP6,F) be used as a direct replacement for TLP781(BLL-TP6,F)?
A: Yes. TLP785(BLL-TP6,F) is a direct equivalent with identical electrical specifications, package configuration, and pin assignment. No circuit modifications are required.
Q: What are the key differences between Everlight EL816 and EL817 series?
A: Both series meet the core electrical requirements for substitution. The primary difference is switching speed: EL816 exhibits rise/fall times of 4µs and 3µs, while EL817 exhibits 6µs and 8µs. EL816 is recommended for applications requiring faster response. Both series are available in multiple package code variants (TD, TU) and input configuration options (S, S1).
Q: Are Everlight EL816 and EL817 parts pin-compatible with TLP781?
A: Yes. All substitute parts maintain the 4-SMD, Gull Wing package configuration with identical pin assignment and spacing, enabling direct PCB replacement.
Q: Do Everlight parts carry compliance certifications?
A: Yes. All Everlight EL816 and EL817 variants listed are ROHS3 compliant. Moisture sensitivity level is 1 (Unlimited) for all parts.
Q: What is the significance of the -V suffix in Everlight part numbers?
A: The -V suffix indicates a variant designation within the EL816 or EL817 series. All -V variants maintain identical electrical specifications and are functionally equivalent to non-suffixed versions for substitution purposes.
Q: Can I mix different Everlight variants in the same design?
A: Yes. All EL816 and EL817 variants meet the electrical and mechanical requirements for substitution. Selection should be based on application-specific timing requirements and availability.
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