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TLP781F(D4-FUNBL,F Equivalent & Substitute Parts
Part Overview
The TLP781F(D4-FUNBL,F is a photocoupler optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation with a 5000Vrms isolation voltage rating in a 4-DIP through-hole package. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TLP781F(D4-FUNBL,F |
| Manufacturer | Toshiba Semiconductor and Storage |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs |
| Rise / Fall Time (Typ) | 2µs, 3µs |
| Input Type | DC |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V |
| Current - DC Forward (If) (Max) | 60mA |
| Vce Saturation (Max) | 400mV |
| Operating Temperature | -55°C ~ 110°C |
| Mounting Type | Through Hole |
| Package / Case | 4-DIP (0.400", 10.16mm) |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute components for the TLP781F(D4-FUNBL,F are identified based on strict electrical and mechanical parameter matching. The critical parameters that determine substitution eligibility are:
- Number of Channels: 1
- Voltage - Isolation: 5000Vrms
- Current Transfer Ratio range: 200% to 600% @ 5mA
- Turn On / Turn Off Time: 3µs, 3µs
- Rise / Fall Time: 2µs, 3µs
- Output Type: Transistor
- Voltage - Output (Max): 80V
- Current - Output / Channel: 50mA
- Operating Temperature: -55°C ~ 110°C
- Package / Case: 4-DIP (0.400", 10.16mm)
- Mounting Type: Through Hole
The identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original component.
Parameter Comparison
| Parameter | TLP781F(D4-FUNBL,F | TLP785F(D4-BL,F | TLP785F(BL,F |
|---|---|---|---|
| Manufacturer | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Number of Channels | 1 | 1 | 1 |
| Voltage - Isolation | 5000Vrms | 5000Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA | 200% @ 5mA | 200% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA | 600% @ 5mA | 600% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | 3µs, 3µs | 3µs, 3µs |
| Rise / Fall Time (Typ) | 2µs, 3µs | 2µs, 3µs | 2µs, 3µs |
| Input Type | DC | DC | DC |
| Output Type | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 80V | 80V | 80V |
| Current - Output / Channel | 50mA | 50mA | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V | 1.15V | 1.15V |
| Current - DC Forward (If) (Max) | 60mA | 60mA | 60mA |
| Vce Saturation (Max) | 400mV | 400mV | 400mV |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package / Case | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active | Active |
Engineering Selection Recommendations
The TLP781F(D4-FUNBL,F is classified as obsolete. Both TLP785F(D4-BL,F and TLP785F(BL,F are active products from the same manufacturer with identical electrical and mechanical specifications. These components are direct substitutes that maintain full compatibility with existing circuit designs and PCB layouts. The TLP785 series variants are recommended for new designs and replacement applications where the original TLP781F component is no longer available.
Frequently Asked Questions (FAQ)
Q: Can TLP785F(D4-BL,F and TLP785F(BL,F be used interchangeably with TLP781F(D4-FUNBL,F?
A: Yes. Both substitute parts maintain identical electrical parameters including isolation voltage, current transfer ratio, timing characteristics, and output specifications. The 4-DIP through-hole package dimensions are identical, ensuring direct PCB compatibility.
Q: What is the difference between TLP785F(D4-BL,F and TLP785F(BL,F?
A: Both parts are parametrically equivalent with identical electrical and mechanical specifications. The difference lies in packaging designations. Both are active products suitable for substitution.
Q: Are there any compliance or certification differences between the original and substitute parts?
A: All three components share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications. Moisture Sensitivity Level is 1 (Unlimited) for all variants.
Q: What is the operating temperature range for these optoisolators?
A: The operating temperature range is -55°C to 110°C for all three components.
Q: Can these components be used in high-voltage isolation applications?
A: Yes. All three components provide 5000Vrms isolation voltage rating, suitable for high-voltage galvanic isolation requirements.
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