TLP781F(D4-FUNGR,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4-FUNGR,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 main part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring compatible isolation solutions.

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
Turn On / Turn Off Time (Typ)	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.15V
Current - DC Forward (If) (Max)	60mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 110°C
Mounting Type	Through Hole
Package / Case	4-DIP (0.400", 10.16mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS	8541.49.8000

Substitute Part Grouping Explanation

Substitution for the TLP781F(D4-FUNGR,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
Switching characteristics: 3µs turn-on/off time, 2µs/3µs rise/fall time
DC input type
Maximum output voltage: 80V
Maximum output current: 50mA per channel
4-DIP through-hole package (0.400", 10.16mm)
Operating temperature range: -55°C to 110°C

All substitute parts listed maintain identical electrical and mechanical specifications across these parameters, ensuring direct functional compatibility in applications designed for the TLP781F(D4-FUNGR,F.

Parameter Comparison

Parameter	TLP781F(D4-FUNGR,F	TLP785F(D4-GR,F	TLP785F(D4GRF7,F	TLP785F(GR,F
Manufacturer	Toshiba	Toshiba	Toshiba	Toshiba
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
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
Input Type	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA
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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
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)
Product Status	Obsolete	Active	Active	Active
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

All three substitute parts—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-FUNGR,F. These substitutes provide direct functional replacement without design modification.

TLP785F(GR,F carries RoHS3 compliance and REACH unaffected status, offering enhanced regulatory alignment for applications subject to environmental standards. TLP785F(D4-GR,F and TLP785F(D4GRF7,F maintain standard compliance with EAR99 export classification and HTSUS code 8541.49.8000.

Selection among the three active substitutes depends on packaging requirements and regulatory compliance needs. All maintain identical performance characteristics and through-hole mounting compatibility with the original TLP781F(D4-FUNGR,F design.

Frequently Asked Questions (FAQ)

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

A: Yes. All three TLP785F variants maintain identical electrical specifications including isolation voltage, current transfer ratio, switching times, output voltage/current ratings, and operating temperature range. The 4-DIP through-hole package dimensions are identical, enabling direct PCB substitution.

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

A: The three variants are parametrically equivalent. TLP785F(GR,F is packaged in tube format and carries RoHS3 compliance certification. TLP785F(D4-GR,F and TLP785F(D4GRF7,F represent alternative part number designations with identical electrical and mechanical characteristics. Selection depends on packaging format preference and regulatory compliance requirements.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. All substitute parts share identical pin configuration, electrical performance, and mechanical dimensions with the TLP781F(D4-FUNGR,F. Direct PCB substitution is supported without circuit modification.

Q: What inventory status should be considered for procurement?

A: TLP785F(GR,F has 1044 units in stock, TLP785F(D4-GR,F has 1025 units, and TLP785F(D4GRF7,F has 647 units available. All three are active products with ongoing availability from Toshiba Semiconductor and Storage.

Q: Does the RoHS3 compliance of TLP785F(GR,F affect electrical performance?

A: No. RoHS3 compliance reflects manufacturing process standards and material composition but does not alter electrical specifications, performance characteristics, or functional compatibility with the original TLP781F(D4-FUNGR,F design.

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