TLP781F(D4-GRL,E) Equivalent & Substitute Parts

Part Overview

The TLP781F(D4-GRL,E) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation voltage and is housed in a 4-DIP package. The part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring this isolation topology.

Substiute Parts

TLP781F(D4-GRL,E)

Toshiba Semiconductor and StorageIn Stock: 879TLP781F(D4-GRL,E) Datasheet

Current PartRFQ

TLP785F(D4-GRL,F

Toshiba Semiconductor and StorageIn Stock: 912TLP785F(D4-GRL,F Datasheet

DirectRFQ

TLP785F(GR-LF7,F

Toshiba Semiconductor and StorageIn Stock: 1143TLP785F(GR-LF7,F Datasheet

Parametric EquivalentRFQ

TLP785F(GRL,F

Toshiba Semiconductor and StorageIn Stock: 1201TLP785F(GRL,F Datasheet

Parametric EquivalentRFQ

TLP785F(GRL-F7,F

Toshiba Semiconductor and StorageIn Stock: 853TLP785F(GRL-F7,F Datasheet

Parametric EquivalentRFQ

EL816(M)(X)

Everlight Electronics Co LtdIn Stock: 1082EL816(M)(X) Datasheet

Parametric EquivalentRFQ

EL816(M)(X)-V

Everlight Electronics Co LtdIn Stock: 998EL816(M)(X)-V Datasheet

Parametric EquivalentRFQ

VO617C-3X016

Vishay Semiconductor Opto DivisionIn Stock: 1132VO617C-3X016 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLP781F(D4-GRL,E) is determined by the following critical parameters:

• Isolation Voltage: 5000Vrms minimum (allows higher ratings)
• Number of Channels: 1 channel
• Output Type: Transistor output
• Package / Case: 4-DIP (0.400", 10.16mm)
• Current Transfer Ratio: 100% minimum @ 5mA
• Output Voltage Rating: 80V maximum
• Output Current: 50mA per channel
• Operating Temperature Range: -55°C ~ 110°C
• Mounting Type: Through Hole

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes (Toshiba TLP785F variants): These parts share identical electrical specifications and packaging with the obsolete TLP781F, differing only in packaging codes and product status (Active vs. Obsolete).

Parametric Equivalents (Everlight EL816 and Vishay VO617C): These parts meet or exceed all critical electrical parameters and maintain the same 4-DIP package footprint, enabling direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

Toshiba TLP785F Series (Direct Substitutes): The TLP785F variants TLP785F(D4-GRL,F), TLP785F(GR-LF7,F), TLP785F(GRL,F), and TLP785F(GRL-F7,F) are the primary substitutes. These parts maintain identical electrical specifications and 4-DIP packaging as the obsolete TLP781F(D4-GRL,E). All variants are in Active product status with equivalent inventory availability. Selection among TLP785F variants depends on packaging code requirements and supplier availability.

Everlight EL816 Series (Parametric Equivalents): The EL816(M)(X) and EL816(M)(X)-V provide parametric equivalence with ROHS3 compliance certification. These parts meet all critical electrical parameters with identical isolation voltage, current transfer ratio, and output ratings. The EL816 series exhibits lower Vce saturation (200mV vs. 400mV), which may improve switching efficiency in applications with tight power budgets. Rise/fall time specifications differ slightly (4µs, 3µs vs. 2µs, 3µs), which is acceptable for most isolation applications.

Vishay VO617C-3X016 (Parametric Equivalent): The VO617C-3X016 exceeds isolation voltage requirements at 5300Vrms and maintains all critical electrical parameters. This part offers ROHS3 compliance and is supplied in Tube packaging. Turn-on/turn-off timing differs (6µs, 4µs vs. 3µs, 3µs), making it suitable for applications where switching speed is not timing-critical.

Frequently Asked Questions (FAQ)

Q: Can I use TLP785F variants as direct replacements for TLP781F(D4-GRL,E)?

A: Yes. The TLP785F series maintains identical electrical specifications, isolation voltage, current transfer ratio, output voltage/current ratings, and 4-DIP package footprint. The only differences are packaging codes and product status (Active vs. Obsolete). Board-level replacement requires no circuit modifications.

Q: What are the differences between Toshiba TLP785F and Everlight EL816?

A: Both meet the core isolation and output specifications. The EL816 features lower Vce saturation (200mV vs. 400mV) and includes ROHS3 compliance certification. Rise/fall time is slightly slower (4µs, 3µs vs. 2µs, 3µs). The EL816 is suitable for applications where switching speed tolerance allows the timing difference.

Q: Is the Vishay VO617C-3X016 compatible with the TLP781F footprint?

A: Yes. The VO617C-3X016 uses the same 4-DIP (0.400", 10.16mm) package and through-hole mounting. It exceeds isolation voltage requirements at 5300Vrms. Turn-on/turn-off timing is slower (6µs, 4µs vs. 3µs, 3µs), which is acceptable for non-timing-critical isolation applications.

Q: Do all substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate across -55°C ~ 110°C, matching the original TLP781F(D4-GRL,E) specification.

Q: Which substitute offers the best compliance certification?

A: The Everlight EL816(M)(X), EL816(M)(X)-V, and Vishay VO617C-3X016 all carry ROHS3 compliance certification. The Toshiba TLP785F variants do not list explicit RoHS certification in the provided specifications.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Current inventory levels vary: TLP785F(GRL,F) has 1123 pcs, TLP785F(GR-LF7,F) has 1065 pcs, VO617C-3X016 has 1053 pcs, EL816(M)(X) has 990 pcs, TLP785F(D4-GRL,F) has 829 pcs, and EL816(M)(X)-V has 926 pcs. Availability should be confirmed with your supplier for production quantities.