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TLP781(TELS,F) Equivalent & Substitute Parts
Part Overview
The TLP781(TELS,F) is an optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation in a 4-DIP package and is designed for DC input applications requiring galvanic isolation with transistor switching capability. The TLP781(TELS,F) is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Active alternatives from Toshiba's TLP785 series and cross-manufacturer options from Everlight Electronics provide direct functional replacement with identical or superior electrical characteristics.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Isolation Voltage | 5000Vrms |
| Number of Channels | 1 |
| Output Type | Transistor |
| Current Transfer Ratio (Min) | 50% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Maximum Output Voltage | 80V |
| Maximum Output Current | 50mA |
| Operating Temperature Range | -55°C to 110°C |
| Package Type | 4-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
Substitute Part Grouping Explanation
Substitution of the TLP781(TELS,F) is determined by the following critical parameters that must remain constant across all equivalent parts:
- Isolation voltage: 5000Vrms
- Number of channels: 1
- Output type: Transistor
- Input type: DC
- Package/case: 4-DIP (0.300", 7.62mm)
- Mounting type: Through Hole
- Current transfer ratio range: 50% to 600% @ 5mA
- Maximum output voltage: 80V
- Maximum output current: 50mA
- Operating temperature range: -55°C to 110°C
All substitute parts listed maintain these electrical and mechanical specifications. Variations in turn-on/turn-off time, rise/fall time, forward voltage, and saturation voltage are within acceptable tolerances for this component category and do not affect functional interchangeability in standard applications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Isolation Voltage | CTR Min @ 5mA | CTR Max @ 5mA | Vce Sat (Max) | Vf (Typ) | Output Current | Temp Range | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| TLP781(TELS,F) | Toshiba | Obsolete | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 1049 Pcs |
| TLP785(TELS,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 3400 Pcs |
| TLP785 | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 39200 Pcs |
| TLP785(D4,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 754 Pcs |
| TLP785(D4-LF6,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 1134 Pcs |
| TLP785(D4B-F6,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 759 Pcs |
| TLP785(D4GH-F6,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 1004 Pcs |
| TLP785(D4GL-F6,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 1080 Pcs |
| TLP785(F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 2332 Pcs |
| TLP785(LF6,F) | Toshiba | Active | 5000Vrms | 50% | 600% | 400mV | 1.15V | 50mA | -55°C to 110°C | 1157 Pcs |
| EL816 | Everlight Electronics | Active | 5000Vrms | 50% | 600% | 200mV | 1.2V | 50mA | -55°C to 110°C | 2400 Pcs |
Engineering Selection Recommendations
The TLP781(TELS,F) is obsolete and should be replaced with active alternatives. The Toshiba TLP785 series provides direct electrical equivalence with identical isolation voltage, current transfer ratio specifications, and package configuration. All TLP785 variants listed maintain full parametric compatibility with the original TLP781(TELS,F).
For new designs and production continuity, TLP785(F) is recommended as the primary replacement due to highest inventory availability (2332 Pcs) and active product status with RoHS3 compliance and REACH unaffected certification. The base TLP785 part number offers the largest inventory stock (39200 Pcs) for extended supply assurance.
The Everlight Electronics EL816 provides cross-manufacturer equivalence with identical isolation voltage and current transfer ratio specifications. The EL816 exhibits superior saturation voltage performance (200mV maximum versus 400mV) and maintains full electrical compatibility. EL816 is RoHS3 compliant with 2400 Pcs inventory availability.
All substitute parts are through-hole mounted in 4-DIP packages and operate across the full -55°C to 110°C temperature range, ensuring direct board-level interchangeability without design modification.
Frequently Asked Questions (FAQ)
Q: Can TLP785 variants be used as direct replacements for TLP781(TELS,F)?
A: Yes. All TLP785 variants maintain identical isolation voltage (5000Vrms), current transfer ratio range (50% to 600% @ 5mA), output voltage and current specifications, operating temperature range, and 4-DIP package configuration. The TLP785 series is the direct successor to the obsolete TLP781(TELS,F).
Q: What is the difference between TLP785(F) and other TLP785 variants?
A: All TLP785 variants listed share identical electrical specifications. Suffix designations (D4, D4-LF6, D4B-F6, D4GH-F6, D4GL-F6, LF6) indicate internal manufacturing process or packaging variations that do not affect electrical performance or interchangeability. Selection should be based on inventory availability and lead time requirements.
Q: Is the Everlight EL816 fully compatible with TLP781(TELS,F)?
A: Yes. The EL816 maintains identical isolation voltage, current transfer ratio specifications, output voltage and current ratings, operating temperature range, and 4-DIP package configuration. The EL816 exhibits lower saturation voltage (200mV versus 400mV), which represents improved performance characteristics. Both components are functionally interchangeable at the board level.
Q: Are there any compliance differences between substitute options?
A: TLP785(F) carries RoHS3 compliance and REACH unaffected certification. EL816 is RoHS3 compliant. All parts are classified under ECCN EAR99 and HTSUS 8541.49.8000. Moisture sensitivity level is 1 (Unlimited) across all options.
Q: Which substitute part should be selected for new production?
A: TLP785(F) is recommended for new designs due to active product status, RoHS3 compliance, REACH certification, and adequate inventory. For applications requiring maximum supply assurance, the base TLP785 part number provides the highest inventory level (39200 Pcs). Cross-manufacturer selection of EL816 is viable for supply diversification.
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