TLP781F(D4-GR-SD,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4-GR-SD,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 4-DIP through-hole packages. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	100% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 110°C
Package / Case	4-DIP (0.400", 10.16mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the TLP781F(D4-GR-SD,F is determined by strict equivalence across the following critical parameters:

Single-channel configuration
5000Vrms isolation voltage
Transistor output topology
Current transfer ratio range: 100% to 300% @ 5mA
Maximum output voltage: 80V
Maximum output current: 50mA per channel
4-DIP through-hole package format
Operating temperature range: -55°C to 110°C
DC input type

All substitute parts listed maintain identical electrical characteristics and mechanical compatibility with the original part number.

Parameter Comparison

Parameter	TLP781F(D4-GR-SD,F	TLP785F(D4-GR,F	TLP785F(D4GRF7,F	TLP785F(GR,F
Manufacturer	Toshiba	Toshiba	Toshiba	Toshiba
Product Status	Obsolete	Active	Active	Active
Number of Channels	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA	300% @ 5mA	300% @ 5mA	300% @ 5mA
Output Type	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs	2µs, 3µs
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	60mA	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Package / Case	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

All three substitute part numbers—TLP785F(D4-GR,F, TLP785F(D4GRF7,F, and TLP785F(GR,F—are active products from Toshiba Semiconductor and Storage with identical electrical and mechanical specifications to the obsolete TLP781F(D4-GR-SD,F.

TLP785F(GR,F carries RoHS3 compliance and REACH unaffected status, providing additional regulatory alignment for new designs. This variant is packaged in tube format.

TLP785F(D4-GR,F and TLP785F(D4GRF7,F maintain the same electrical performance and are available in active production status. Selection between these variants should be based on packaging format requirements and supply chain availability.

All substitute parts share identical isolation voltage, current transfer ratio specifications, output characteristics, and thermal operating range with the original part.

Frequently Asked Questions (FAQ)

Q: Can TLP785F variants directly replace TLP781F(D4-GR-SD,F in existing designs?

A: Yes. All three TLP785F variants maintain identical electrical specifications across isolation voltage, current transfer ratio, output voltage and current ratings, timing characteristics, and operating temperature range. The 4-DIP through-hole package format is mechanically compatible.

Q: What is the difference between TLP785F(D4-GR,F, TLP785F(D4GRF7,F, and TLP785F(GR,F?

A: These part numbers represent different packaging and compliance variants of the same electrical design. TLP785F(GR,F includes RoHS3 compliance and REACH unaffected status. Packaging format and supplier device package designations differ, but electrical performance is identical.

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

A: The TLP781F series has been superseded by the TLP785F series within Toshiba's product portfolio. The TLP785F variants provide equivalent functionality with active production status and improved compliance certifications.

Q: Are there any electrical parameter differences between the main part and substitutes?

A: No. All parameters including isolation voltage (5000Vrms), current transfer ratio (100% to 300% @ 5mA), maximum output voltage (80V), maximum output current (50mA), timing characteristics, and operating temperature range (-55°C to 110°C) are identical across all part numbers.

Q: What packaging options are available for TLP785F substitutes?

A: TLP785F(D4-GR,F and TLP785F(D4GRF7,F are available in standard packaging. TLP785F(GR,F is supplied in tube format. All maintain the 4-DIP (0.400", 10.16mm) through-hole package configuration.

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