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TLP781F(D4SANGBT7F Equivalent & Substitute Parts
Part Overview
The TLP781F(D4SANGBT7F is a photocoupler optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-DIP package. The device is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Toshiba Semiconductor and Storage |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 100% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs |
| Rise / Fall Time (Typ) | 2µs, 3µs |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Vce Saturation (Max) | 400mV |
| Operating Temperature | -55°C ~ 110°C |
| Package / Case | 4-DIP (0.400", 10.16mm) |
| Mounting Type | Through Hole |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the TLP781F(D4SANGBT7F is determined by strict equivalence across the following critical parameters:
- Isolation voltage rating: 5000Vrms
- Number of channels: 1
- Output configuration: Transistor output
- Current transfer ratio range: 100% to 600% @ 5mA
- Switching time characteristics: 3µs turn-on/off, 2µs/3µs rise/fall
- Maximum output voltage: 80V
- Maximum output current per channel: 50mA
- Package type: 4-DIP through-hole
- Operating temperature range: -55°C to 110°C
The TLP785F(D4GBT7,F meets all these criteria and qualifies as a direct functional equivalent.
Parameter Comparison
| Parameter | TLP781F(D4SANGBT7F | TLP785F(D4GBT7,F | Match |
|---|---|---|---|
| Manufacturer | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Yes |
| Number of Channels | 1 | 1 | Yes |
| Voltage - Isolation | 5000Vrms | 5000Vrms | Yes |
| Current Transfer Ratio (Min) | 100% @ 5mA | 100% @ 5mA | Yes |
| Current Transfer Ratio (Max) | 600% @ 5mA | 600% @ 5mA | Yes |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | 3µs, 3µs | Yes |
| Rise / Fall Time (Typ) | 2µs, 3µs | 2µs, 3µs | Yes |
| Output Type | Transistor | Transistor | Yes |
| Voltage - Output (Max) | 80V | 80V | Yes |
| Current - Output / Channel | 50mA | 50mA | Yes |
| Vce Saturation (Max) | 400mV | 400mV | Yes |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C | Yes |
| Package / Case | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) | Yes |
| Mounting Type | Through Hole | Through Hole | Yes |
| Product Status | Obsolete | Active | Favorable |
Engineering Selection Recommendations
The TLP785F(D4GBT7,F is a direct substitute for the obsolete TLP781F(D4SANGBT7F. All electrical parameters, switching characteristics, isolation ratings, and package specifications are identical. The TLP785F(D4GBT7,F carries active product status, ensuring continued availability and supply chain support. Both components share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, confirming regulatory equivalence. The MSL rating of 1 (Unlimited) applies to both parts, indicating no moisture sensitivity constraints during storage or handling.
Frequently Asked Questions (FAQ)
Q: Can the TLP785F(D4GBT7,F be used as a direct replacement for the TLP781F(D4SANGBT7F in existing designs?
A: Yes. All electrical specifications, timing characteristics, isolation voltage, output current capacity, and package dimensions are identical. No circuit modifications are required.
Q: What is the primary advantage of using the TLP785F(D4GBT7,F over the TLP781F(D4SANGBT7F?
A: The TLP785F(D4GBT7,F maintains active product status, ensuring reliable long-term availability and supply chain continuity. The obsolete TLP781F(D4SANGBT7F has limited procurement options.
Q: Are there any differences in isolation voltage or switching speed between these parts?
A: No. Both components provide 5000Vrms isolation with identical turn-on/off times of 3µs and rise/fall times of 2µs/3µs.
Q: Do both parts use the same 4-DIP package?
A: Yes. Both components use a 4-DIP through-hole package with 0.400" (10.16mm) spacing, ensuring mechanical and electrical compatibility on PCBs designed for the TLP781F(D4SANGBT7F.
Q: Are there any regulatory or compliance differences?
A: No. Both parts share identical ECCN and HTSUS classifications and carry MSL 1 (Unlimited) ratings.
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