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

Part Overview

The TLP781F(D4-GR-TC,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 performance.

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-GR-TC,F is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Current Transfer Ratio Range: 100% to 300% @ 5mA (mandatory match)
Switching Characteristics: Turn-on/turn-off time 3µs, rise/fall time 2µs/3µs (mandatory match)
Output Stage: Transistor output with 80V maximum, 50mA per channel (mandatory match)
Input Type: DC (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 performance and mechanical compatibility with the original part. Differences in product status and packaging format do not affect functional equivalence.

Parameter Comparison

Parameter	TLP781F(D4-GR-TC,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
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(D4-GR,F, TLP785F(D4GRF7,F, and TLP785F(GR,F—are functionally equivalent to the obsolete TLP781F(D4-GR-TC,F and provide direct replacement capability. The substitute parts carry active product status, ensuring ongoing availability and manufacturing support.

TLP785F(GR,F offers RoHS3 compliance and REACH unaffected status, providing additional regulatory alignment for applications requiring environmental compliance documentation. TLP785F(D4-GR,F and TLP785F(D4GRF7,F maintain standard MSL Level 1 classification. All parts share identical electrical characteristics, switching performance, and thermal operating range.

Selection among the three active substitutes depends on packaging format requirements and regulatory compliance needs specific to the application. All maintain the same 4-DIP through-hole footprint and are pin-compatible with the original part.

Frequently Asked Questions (FAQ)

Q: Can TLP785F parts directly replace the obsolete TLP781F(D4-GR-TC,F?

A: Yes. All three TLP785F variants are parametric equivalents with identical isolation voltage (5000Vrms), current transfer ratio (100–300% @ 5mA), switching characteristics, output ratings, and package configuration. Pin-for-pin replacement is supported.

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

A: The three parts are electrically identical. Differences exist in packaging format and regulatory compliance. TLP785F(GR,F is supplied in tube packaging and includes RoHS3 and REACH compliance documentation. TLP785F(D4-GR,F and TLP785F(D4GRF7,F maintain standard MSL Level 1 classification. All are functionally interchangeable.

Q: Are the 4-DIP packages mechanically identical?

A: Yes. All parts use the same 4-DIP (0.400", 10.16mm) through-hole package. PCB footprints and mounting requirements are identical across all variants.

Q: What is the operating temperature range for these optoisolators?

A: All parts operate across -55°C to 110°C, supporting industrial and extended temperature applications.

Q: Do these parts require special handling or storage?

A: MSL Level 1 classification (or Not Applicable for TLP785F(GR,F) indicates unlimited shelf life without moisture sensitivity concerns. Standard component storage practices apply.

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