TLP781F(D4GRF7TC,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4GRF7TC,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 substitute parts 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(D4GRF7TC,F is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Output Type: Transistor (mandatory match)
Current Transfer Ratio: 100% - 300% @ 5mA (mandatory match)
Switching Characteristics: Turn On/Off Time 3µs, Rise/Fall Time 2µs/3µs (mandatory match)
Output Specifications: Maximum 80V, 50mA per channel (mandatory match)
Package: 4-DIP through-hole (mandatory match)
Operating Temperature Range: -55°C ~ 110°C (mandatory match)

All substitute parts listed maintain identical electrical and mechanical specifications across these parameters, ensuring direct functional compatibility in applications originally designed for the TLP781F(D4GRF7TC,F.

Parameter Comparison

Parameter	TLP781F(D4GRF7TC,F	TLP785F(D4GRF7,F	TLP785F(D4-GR,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
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)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable
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(D4GRF7,F, TLP785F(D4-GR,F, and TLP785F(GR,F—are active products from Toshiba Semiconductor and Storage with identical electrical and mechanical specifications to the obsolete TLP781F(D4GRF7TC,F. These parts provide direct functional replacement in applications requiring single-channel 5000Vrms isolation with transistor output in 4-DIP through-hole configuration.

The TLP785F variants differ only in packaging and compliance certifications. TLP785F(GR,F carries ROHS3 compliance and REACH unaffected status, making it suitable for applications with regulatory requirements. TLP785F(D4GRF7,F and TLP785F(D4-GR,F maintain standard MSL 1 ratings. Selection among these variants should be based on specific packaging requirements and regulatory compliance mandates of the target application.

Frequently Asked Questions (FAQ)

Q: Can TLP785F variants directly replace the obsolete TLP781F(D4GRF7TC,F?

A: Yes. All three TLP785F variants maintain identical electrical specifications including isolation voltage, current transfer ratio, switching characteristics, output ratings, and operating temperature range. The 4-DIP through-hole package is mechanically identical, enabling direct pin-compatible substitution.

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

A: The three variants are electrically and mechanically identical. Differences exist only in packaging format and compliance certifications. TLP785F(GR,F is supplied in tube packaging with ROHS3 and REACH compliance. The other variants maintain standard MSL 1 moisture sensitivity ratings. Selection depends on packaging preference and regulatory requirements.

Q: Are there any performance differences between the main part and substitute parts?

A: No. All parts maintain identical specifications across isolation voltage, current transfer ratio, switching times, output voltage and current ratings, forward voltage characteristics, saturation voltage, and operating temperature range.

Q: What packaging considerations apply to these optoisolators?

A: All parts use 4-DIP through-hole packages with 0.400" (10.16mm) body width. This standard DIP package is compatible with conventional PCB through-hole assembly processes and breadboard prototyping. No special handling beyond standard MSL 1 moisture precautions is required.

Q: Are these parts suitable for high-isolation applications?

A: Yes. All parts provide 5000Vrms isolation rating, suitable for applications requiring galvanic isolation between circuits operating at different potential levels or in noisy industrial environments.

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