TLP781F(D4-Y-TP7,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4-Y-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 surface mount configurations. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

TLP781F(D4-Y-TP7,F

Toshiba Semiconductor and StorageIn Stock: 932TLP781F(D4-Y-TP7,F Datasheet

Current PartRFQ

TLP785F(D4Y-T7,F

Toshiba Semiconductor and StorageIn Stock: 903TLP785F(D4Y-T7,F Datasheet

DirectRFQ

TLP785(Y-TP6,F

Toshiba Semiconductor and StorageIn Stock: 1206TLP785(Y-TP6,F Datasheet

Parametric EquivalentRFQ

TLP785F(Y-TP7,F

Toshiba Semiconductor and StorageIn Stock: 913TLP785F(Y-TP7,F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLP781F(D4-Y-TP7,F is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Isolation: 5000Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Current Transfer Ratio range: 50% to 150% @ 5mA (mandatory match)
• Turn On / Turn Off Time: 3µs, 3µs (mandatory match)
• Rise / Fall Time: 2µs, 3µs (mandatory match)
• Input Type: DC (mandatory match)
• Output Type: Transistor (mandatory match)
• Voltage - Output (Max): 80V (mandatory match)
• Current - Output / Channel: 50mA (mandatory match)
• Voltage - Forward (Vf) (Typ): 1.15V (mandatory match)
• Current - DC Forward (If) (Max): 60mA (mandatory match)
• Vce Saturation (Max): 400mV (mandatory match)
• Operating Temperature: -55°C ~ 110°C (mandatory match)

Mechanical Compatibility:

• Mounting Type: Surface Mount (for direct SMD substitution)
• Package / Case: 4-SMD, Gull Wing (for direct SMD substitution)

Compliance & Certification:

• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• ECCN: EAR99
• HTSUS: 8541.49.8000

Substitute parts are grouped into two categories: direct manufacturer equivalents (same package type) and parametric equivalents (alternative package types with identical electrical specifications).

Parameter Comparison

Engineering Selection Recommendations

For Surface Mount Applications (Recommended Primary Substitutes):

TLP785(Y-TP6,F and TLP785F(Y-TP7,F are the preferred substitutes for the obsolete TLP781F(D4-Y-TP7,F. Both parts maintain identical electrical specifications and surface mount packaging (4-SMD, Gull Wing), requiring no PCB layout modifications. Both substitute parts carry active product status, ensuring long-term availability and manufacturing support. Inventory levels for both alternatives exceed 800 units.

For Through-Hole Applications (Alternative Substitute):

TLP785F(D4Y-T7,F provides electrical equivalence with a through-hole 4-DIP package. This substitute is suitable only for designs that can accommodate DIP packaging or for legacy board revisions. This part carries active product status and has 845 units in stock.

All substitute parts comply with identical export control classifications (ECCN: EAR99) and tariff codes (HTSUS: 8541.49.8000) as the main part.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(D4Y-T7,F replace TLP781F(D4-Y-TP7,F in an existing surface mount design?

A: No. TLP785F(D4Y-T7,F uses through-hole 4-DIP packaging, while the original part uses surface mount 4-SMD packaging. PCB layout and assembly process modifications would be required. For surface mount designs, use TLP785(Y-TP6,F or TLP785F(Y-TP7,F instead.

Q: Are all three substitute parts electrically identical to the main part?

A: Yes. All three substitute parts (TLP785F(D4Y-T7,F, TLP785(Y-TP6,F, and TLP785F(Y-TP7,F) match all electrical parameters of the TLP781F(D4-Y-TP7,F, including isolation voltage, current transfer ratio, timing characteristics, and output specifications.

Q: What is the difference between TLP785(Y-TP6,F and TLP785F(Y-TP7,F?

A: Both parts are surface mount 4-SMD optoisolators with identical electrical specifications. The difference lies in the base product number designation (TLP785 versus TLP785F). Both are active products suitable for direct substitution in surface mount applications.

Q: Why is the original TLP781F(D4-Y-TP7,F listed as obsolete?

A: Product obsolescence is determined by the manufacturer. Active substitute parts from the same manufacturer with identical electrical specifications are available for continued design support.

Q: Do the substitute parts have the same moisture sensitivity requirements?

A: Yes. All substitute parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are export control classifications the same for all parts?

A: Yes. The main part and all three substitutes are classified under ECCN: EAR99 and HTSUS: 8541.49.8000, with no differences in export or tariff treatment.