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TLP781F(GRH-TP7,F) Equivalent & Substitute Parts
Part Overview
The TLP781F(GRH-TP7,F) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation and is designed for DC input applications requiring galvanic isolation in 4-SMD surface mount packaging. The part is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Toshiba Semiconductor and Storage |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 150% @ 5mA |
| Current Transfer Ratio (Max) | 300% @ 5mA |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Operating Temperature | -55°C ~ 110°C |
| Mounting Type | Surface Mount |
| Package / Case | 4-SMD, Gull Wing |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the TLP781F(GRH-TP7,F) is determined by strict equivalence across the following critical parameters:
- Isolation Voltage: 5000Vrms (mandatory match)
- Number of Channels: 1 (mandatory match)
- Output Type: Transistor (mandatory match)
- Current Transfer Ratio: 150% minimum @ 5mA (mandatory match)
- Voltage - Output (Max): 80V (mandatory match)
- Current - Output / Channel: 50mA (mandatory match)
- Operating Temperature Range: -55°C ~ 110°C (mandatory match)
- Input Type: DC (mandatory match)
- Mounting Type: Surface Mount (mandatory match for direct PCB replacement)
- Package / Case: 4-SMD, Gull Wing (mandatory match for direct PCB replacement)
Substitute parts are classified into two categories:
Direct Manufacturer Substitute: TLP785F(GRH-T7,F) from Toshiba maintains all electrical parameters but differs in mounting type (Through Hole vs. Surface Mount), requiring PCB layout modification.
Parametric Equivalents: Everlight Electronics EL816 series variants meet all electrical specifications and maintain 4-SMD surface mount packaging, enabling direct PCB substitution without layout changes.
Parameter Comparison
| Parameter | TLP781F(GRH-TP7,F) | TLP785F(GRH-T7,F) | TLP785(GRH-TP6,F) | EL816(S)(Y)(TD) | EL816(S)(Y)(TD)-V | EL816(S)(Y)(TU) | EL816(S)(Y)(TU)-V | EL816(S1)(Y)(TD) | EL816(S1)(Y)(TD)-V | EL816(S1)(Y)(TU) | EL816(S1)(Y)(TU)-V |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Toshiba | Toshiba | Toshiba | Everlight | Everlight | Everlight | Everlight | Everlight | Everlight | Everlight | Everlight |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA | 150% @ 5mA |
| Current Transfer Ratio (Max) | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA | 300% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | 3µs, 3µs | 3µs, 3µs | — | — | — | — | — | — | — | — |
| Rise / Fall Time (Typ) | 2µs, 3µs | 2µs, 3µs | 2µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs | 4µs, 3µs |
| Input Type | DC | DC | DC | DC | DC | DC | DC | DC | DC | DC | DC |
| Output Type | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 80V | 80V | 80V | 80V | 80V | 80V | 80V | 80V | 80V | 80V | 80V |
| Current - Output / Channel | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V | 1.15V | 1.15V | 1.2V | 1.2V | 1.2V | 1.2V | 1.2V | 1.2V | 1.2V | 1.2V |
| Current - DC Forward (If) (Max) | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA |
| Vce Saturation (Max) | 400mV | 400mV | 400mV | 200mV | 200mV | 200mV | 200mV | 200mV | 200mV | 200mV | 200mV |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C | -55°C ~ 110°C |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, Gull Wing | 4-DIP (0.400", 10.16mm) | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | — | — | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
For Direct PCB Replacement (Surface Mount, No Layout Changes)
The TLP785(GRH-TP6,F) from Toshiba is the primary substitute. This part maintains identical electrical specifications and 4-SMD surface mount packaging, enabling direct PCB substitution. The part is active and RoHS Compliant, ensuring long-term availability and regulatory compliance.
The Everlight Electronics EL816 series variants (EL816(S)(Y)(TD), EL816(S)(Y)(TD)-V, EL816(S)(Y)(TU), EL816(S)(Y)(TU)-V, EL816(S1)(Y)(TD), EL816(S1)(Y)(TD)-V, EL816(S1)(Y)(TU), EL816(S1)(Y)(TU)-V) provide parametric equivalence with all critical electrical parameters matched. All EL816 variants are active and ROHS3 Compliant. These parts feature improved Vce saturation performance (200mV vs. 400mV), which may enhance switching efficiency in applications with tight output current requirements.
For Applications Permitting PCB Layout Modification
The TLP785F(GRH-T7,F) from Toshiba offers identical electrical performance but requires through-hole mounting accommodation. This option is suitable only when PCB redesign is feasible.
Compliance Considerations
All recommended substitutes maintain the mandatory 5000Vrms isolation voltage, DC input type, and -55°C to 110°C operating temperature range. Everlight EL816 variants provide enhanced RoHS3 compliance status compared to the obsolete TLP781F. Moisture sensitivity level remains constant at MSL 1 (Unlimited) across all alternatives.
Frequently Asked Questions (FAQ)
Q: Can the TLP785(GRH-TP6,F) be used as a direct replacement for the TLP781F(GRH-TP7,F)?
A: Yes. The TLP785(GRH-TP6,F) maintains all electrical specifications including isolation voltage, current transfer ratio, output voltage, and operating temperature range. Both parts use 4-SMD surface mount packaging with identical pinout, enabling direct PCB substitution without layout modification.
Q: What is the difference between Toshiba TLP785 variants and Everlight EL816 variants?
A: Both meet the mandatory electrical specifications for substitution. The primary difference is manufacturer and Vce saturation performance. Toshiba TLP785(GRH-TP6,F) specifies 400mV maximum Vce saturation, while Everlight EL816 variants specify 200mV maximum. The lower saturation voltage in EL816 parts may provide improved efficiency in output current-limited applications. All variants maintain 5000Vrms isolation and 150-300% current transfer ratio.
Q: Why do some EL816 variants show no turn-on/turn-off time specifications?
A: The provided data does not include turn-on/turn-off time values for EL816 variants. Rise and fall times are specified at 4µs and 3µs respectively, which are within acceptable tolerance for the application class. Detailed timing specifications should be obtained from Everlight datasheets if critical for application timing requirements.
Q: Is the TLP785F(GRH-T7,F) suitable for direct PCB replacement?
A: No. The TLP785F(GRH-T7,F) uses 4-DIP through-hole packaging, while the original TLP781F uses 4-SMD surface mount. PCB layout modification is required to accommodate the different mounting type and pin spacing. This option is only viable when PCB redesign is feasible.
Q: Are all substitute parts RoHS compliant?
A: The TLP785(GRH-TP6,F) is RoHS Compliant. All Everlight EL816 variants are ROHS3 Compliant. The original TLP781F(GRH-TP7,F) does not specify RoHS status due to its obsolete status. For new designs or production requiring RoHS compliance, the TLP785(GRH-TP6,F) or any EL816 variant is appropriate.
Q: What is the moisture sensitivity level for all parts?
A: All parts, including the original TLP781F and all substitutes, have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.
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