TLP781F(D4-YH,F) Equivalent & Substitute Parts

Part Overview

The TLP781F(D4-YH,F) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation in a 4-DIP through-hole package and is designed for DC input applications requiring galvanic isolation. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

TLP781F(D4-YH,F)

Toshiba Semiconductor and StorageIn Stock: 729TLP781F(D4-YH,F) Datasheet

Current PartRFQ

TLP785F(D4-YH,F

Toshiba Semiconductor and StorageIn Stock: 1200TLP785F(D4-YH,F Datasheet

DirectRFQ

TLP785F(D4YHF7,F

Toshiba Semiconductor and StorageIn Stock: 839TLP785F(D4YHF7,F Datasheet

Parametric EquivalentRFQ

TLP785F(YH,F

Toshiba Semiconductor and StorageIn Stock: 1073TLP785F(YH,F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP781F(D4-YH,F) are qualified based on the following critical parameters that must remain constant:

• Isolation Voltage: 5000Vrms (primary isolation specification)
• Number of Channels: 1 (functional requirement)
• Output Type: Transistor (circuit topology requirement)
• Current Transfer Ratio Range: 75% to 150% @ 5mA (transfer characteristic)
• Package / Case: 4-DIP (0.400", 10.16mm) (mechanical and electrical interface)
• Mounting Type: Through Hole (assembly compatibility)
• Operating Temperature Range: -55°C ~ 110°C (thermal specification)
• Input Type: DC (signal type)
• Output Voltage (Max): 80V (maximum rated output)
• Output Current / Channel: 50mA (current capability)

All substitute parts listed maintain identical specifications across these parameters, ensuring direct functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TLP781F(D4-YH,F) is obsolete and no longer in active production. All three substitute parts—TLP785F(D4-YH,F), TLP785F(D4YHF7,F), and TLP785F(YH,F)—are manufactured by Toshiba Semiconductor and Storage with active product status. These substitutes maintain identical electrical and mechanical specifications, ensuring direct compatibility in existing circuit designs.

Selection among the three active TLP785F variants should be based on availability and procurement lead times. All variants share the same base product number TLP785 and are functionally equivalent for applications requiring single-channel optoisolation at 5000Vrms with transistor output in 4-DIP through-hole packaging.

Frequently Asked Questions (FAQ)

Q: Can TLP785F variants directly replace the obsolete TLP781F(D4-YH,F)?

A: Yes. All TLP785F variants maintain identical electrical specifications, isolation voltage, current transfer ratio, timing characteristics, output voltage and current ratings, operating temperature range, and 4-DIP package dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between TLP785F(D4-YH,F), TLP785F(D4YHF7,F), and TLP785F(YH,F)?

A: These variants differ only in packaging designations and supplier device package codes. All three share the same base product number TLP785 and maintain identical electrical and mechanical specifications. Selection should be based on availability and procurement requirements.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: No. All parts carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications and share the same Moisture Sensitivity Level (MSL) rating of 1 (Unlimited).

Q: Is the 4-DIP package footprint identical across all variants?

A: Yes. All parts use the 4-DIP (0.400", 10.16mm) package with through-hole mounting, ensuring identical PCB layout compatibility.

Q: What inventory levels are available for the substitute parts?

A: TLP785F(D4-YH,F) has 1152 pieces in stock, TLP785F(D4YHF7,F) has 761 pieces in stock, and TLP785F(YH,F) has 978 pieces in stock.