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TLP781(D4-TP6,F) Equivalent & Substitute Parts
Part Overview
The TLP781(D4-TP6,F) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation voltage in a 4-SMD surface mount package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Toshiba Semiconductor and Storage |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Output Type | Transistor |
| Current Transfer Ratio (Min) | 50% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Operating Temperature | -55°C ~ 110°C |
| Package / Case | 4-SMD, Gull Wing |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitute parts for the TLP781(D4-TP6,F) are classified based on strict electrical and mechanical parameter alignment:
Primary Substitution Criteria:
- Voltage - Isolation: 5000Vrms (mandatory)
- Number of Channels: 1 (mandatory)
- Output Type: Transistor (mandatory)
- Current Transfer Ratio range: 50% to 600% @ 5mA (mandatory)
- Voltage - Output (Max): 80V (mandatory)
- Current - Output / Channel: 50mA (mandatory)
- Package / Case: 4-SMD, Gull Wing (mandatory)
- Operating Temperature: -55°C ~ 110°C (mandatory)
Toshiba TLP785 Series (Direct Manufacturer Equivalents): Parts TLP785(D4-TP6,F), TLP785(D4GL-T6,F), TLP785(D4GH-T6,F), TLP785(TP6,F), TLP785F(D4-TP7,F), and TLP785F(TP7,F) meet all electrical parameters identically and share the same base product architecture. These parts are active products with enhanced availability compared to the obsolete TLP781(D4-TP6,F).
Everlight EL816 Series (Cross-Manufacturer Equivalents): Parts EL816(S)(TD), EL816(S)(TD)-V, EL816(S)(TU)-V, and EL816(S1)(TD) from Everlight Electronics Co Ltd satisfy all mandatory electrical parameters. Minor variations exist in Vce Saturation (200mV vs 400mV) and Rise/Fall Time specifications, which remain within functional tolerance for standard applications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Isolation Voltage | CTR Min / Max | Vce Sat (Max) | Rise / Fall Time | Inventory |
|---|---|---|---|---|---|---|---|
| TLP781(D4-TP6,F) | Toshiba | Obsolete | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 800 Pcs |
| TLP785(D4-TP6,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 1161 Pcs |
| TLP785(D4GL-T6,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 4710 Pcs |
| TLP785(D4GH-T6,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 5006 Pcs |
| TLP785(TP6,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 7400 Pcs |
| TLP785F(D4-TP7,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 992 Pcs |
| TLP785F(TP7,F) | Toshiba | Active | 5000Vrms | 50% / 600% | 400mV | 2µs, 3µs | 828 Pcs |
| EL816(S)(TD) | Everlight | Active | 5000Vrms | 50% / 600% | 200mV | 4µs, 3µs | 882 Pcs |
| EL816(S)(TD)-V | Everlight | Active | 5000Vrms | 50% / 600% | 200mV | 4µs, 3µs | 828 Pcs |
| EL816(S)(TU)-V | Everlight | Active | 5000Vrms | 50% / 600% | 200mV | 4µs, 3µs | 674 Pcs |
| EL816(S1)(TD) | Everlight | Active | 5000Vrms | 50% / 600% | 200mV | 4µs, 3µs | 651 Pcs |
Engineering Selection Recommendations
Toshiba TLP785 Series Selection: The TLP785 series represents the direct successor to the obsolete TLP781(D4-TP6,F). All variants maintain identical electrical specifications and package geometry. TLP785(D4GH-T6,F) and TLP785(TP6,F) offer the highest inventory availability (5006 Pcs and 7400 Pcs respectively) and are classified as active products with RoHS compliance certification. These parts are recommended as primary substitutes for new designs and ongoing production support.
Everlight EL816 Series Selection: The EL816 series provides cross-manufacturer equivalence with all critical electrical parameters matched. EL816(S)(TD), EL816(S)(TD)-V, EL816(S)(TU)-V, and EL816(S1)(TD) are all active products with ROHS3 compliance. The lower Vce Saturation specification (200mV vs 400mV) represents improved performance characteristics. These parts are suitable for applications where cross-manufacturer sourcing is acceptable and provide alternative supply chain options.
Frequently Asked Questions (FAQ)
Q: Can TLP785 series parts directly replace the obsolete TLP781(D4-TP6,F)? A: Yes. The TLP785 series maintains identical electrical specifications including isolation voltage (5000Vrms), current transfer ratio (50% to 600% @ 5mA), output voltage (80V max), and output current (50mA). Package geometry and pin configuration are equivalent. Direct PCB substitution is supported.
Q: What are the differences between TLP785 variants (D4-TP6,F vs D4GL-T6,F vs D4GH-T6,F vs TP6,F)? A: All TLP785 variants meet identical electrical specifications. Differences are limited to packaging format and tape/reel configurations. D4GL-T6,F and D4GH-T6,F are supplied in Tape & Reel format with RoHS compliance. TP6,F is available in Tape & Reel with RoHS compliance. D4-TP6,F is supplied in standard packaging. Selection should be based on procurement requirements and inventory availability.
Q: Are Everlight EL816 parts fully compatible with TLP781(D4-TP6,F)? A: EL816 parts satisfy all mandatory electrical parameters and package requirements. The lower Vce Saturation (200mV vs 400mV) and slightly higher Rise Time (4µs vs 2µs) represent minor performance variations that remain within functional tolerance for standard optoisolator applications. Cross-manufacturer substitution is electrically valid.
Q: What is the significance of the Vce Saturation difference between TLP785 (400mV) and EL816 (200mV)? A: Vce Saturation defines the voltage drop across the transistor output in saturation state. The EL816 specification of 200mV is lower, indicating reduced power dissipation in the output stage. Both values are within acceptable operating ranges for standard applications. The difference does not prevent functional substitution.
Q: Which substitute part offers the best availability? A: TLP785(TP6,F) provides the highest inventory level at 7400 Pcs. TLP785(D4GH-T6,F) offers 5006 Pcs. Both are active products with immediate availability and are recommended for production applications requiring reliable supply.
Q: Are all substitute parts RoHS compliant? A: TLP785 variants (D4GL-T6,F, D4GH-T6,F, TP6,F) are RoHS Compliant. EL816 variants are ROHS3 Compliant. Both compliance levels are acceptable for modern electronic applications.
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