TLP781(D4-LF6,F) Equivalent & Substitute Parts

Part Overview

The TLP781(D4-LF6,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. The part is currently classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement planning.

Substiute Parts

TLP781(D4-LF6,F)

Toshiba Semiconductor and StorageIn Stock: 1090TLP781(D4-LF6,F) Datasheet

Current PartRFQ

TLP785(D4-LF6,F

Toshiba Semiconductor and StorageIn Stock: 1215TLP785(D4-LF6,F Datasheet

DirectRFQ

TLP785F(D4-LF7,F

Toshiba Semiconductor and StorageIn Stock: 1197TLP785F(D4-LF7,F Datasheet

Parametric EquivalentRFQ

TLP785F(LF7,F

Toshiba Semiconductor and StorageIn Stock: 917TLP785F(LF7,F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP781(D4-LF6,F) are identified based on electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Voltage isolation rating: 5000Vrms
• Number of channels: 1
• Current transfer ratio range: 50% to 600% @ 5mA
• Turn-on/turn-off timing: 3µs, 3µs
• Rise/fall time: 2µs, 3µs
• Input type: DC
• Output type: Transistor
• Maximum output voltage: 80V
• Output current per channel: 50mA
• Forward voltage (Vf): 1.15V typical
• Maximum DC forward current: 60mA
• Vce saturation: 400mV maximum
• Operating temperature range: -55°C ~ 110°C

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount or Through Hole (package-dependent)
• Moisture sensitivity level: 1 (Unlimited)

Substitutes are grouped into two categories:

Direct Manufacturer Substitute: Parts from the same manufacturer (Toshiba) with identical electrical specifications but different packaging or product status.

Parametric Equivalent: Parts meeting all electrical specifications with identical mounting type and package configuration.

Parameter Comparison

Engineering Selection Recommendations

For Surface Mount Applications (Recommended Primary Substitutes):

TLP785F(D4-LF7,F) and TLP785F(LF7,F) are the preferred substitutes for the TLP781(D4-LF6,F). Both parts maintain identical electrical specifications and surface mount packaging configuration. These parts carry active product status from Toshiba, ensuring ongoing availability and manufacturing support. Selection between these two variants depends on specific supplier device package requirements and inventory availability.

For Through Hole Applications (Alternative Mounting):

TLP785(D4-LF6,F) provides electrical equivalence with a through-hole 4-DIP package configuration. This substitute is suitable only when circuit board design permits through-hole mounting. The part maintains active product status and identical electrical performance.

Compliance and Certification:

All substitute parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications with the original TLP781(D4-LF6,F), ensuring consistent regulatory treatment across procurement and export documentation.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(D4-LF7,F) directly replace TLP781(D4-LF6,F) in existing designs?

A: Yes. Both parts are surface mount 4-SMD packages with identical electrical specifications, isolation voltage, current transfer ratios, timing characteristics, and operating temperature ranges. Direct substitution is electrically and mechanically compatible.

Q: What is the difference between TLP785F(D4-LF7,F) and TLP785F(LF7,F)?

A: Both parts are parametrically equivalent with identical electrical performance and surface mount packaging. The difference lies in the supplier device package designation. Selection should be based on specific supplier availability and internal part numbering requirements.

Q: Why is TLP785(D4-LF6,F) listed as a substitute if it uses through-hole packaging?

A: TLP785(D4-LF6,F) is electrically equivalent to the TLP781(D4-LF6,F) and maintains active product status. It is suitable as a substitute only for applications where circuit board design permits through-hole mounting. Surface mount designs should use TLP785F variants.

Q: Are all substitute parts manufactured by Toshiba?

A: Yes. All substitute parts listed are manufactured by Toshiba Semiconductor and Storage, maintaining consistent quality standards and regulatory compliance.

Q: What is the moisture sensitivity level for these optoisolators?

A: All parts, including the original TLP781(D4-LF6,F) and all substitutes, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Can I use these parts interchangeably in high-speed switching applications?

A: Yes. All parts maintain identical turn-on/turn-off timing (3µs, 3µs) and rise/fall time characteristics (2µs, 3µs), ensuring consistent switching performance across all listed components.