TLP781F(D4GRH-T7,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4GRH-T7,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 through-hole 4-DIP packaging. The part is currently listed as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP781F(D4GRH-T7,F
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	150% @ 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)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the TLP781F(D4GRH-T7,F are identified based on the following critical parameters that define functional compatibility:

Isolation Voltage: 5000Vrms (must match exactly)
Number of Channels: 1 (single channel configuration)
Output Type: Transistor (required for this application class)
Package / Case: 4-DIP (0.400", 10.16mm) (mechanical and pin compatibility)
Input Type: DC (signal interface requirement)
Operating Temperature Range: -55°C ~ 110°C (thermal operating envelope)

The substitute parts identified maintain these core parameters while offering active product status and improved availability. Variations in Current Transfer Ratio specifications are permitted within the optoisolator product family, as this parameter defines performance characteristics rather than fundamental compatibility.

Parameter Comparison

Parameter	TLP781F(D4GRH-T7,F	TLP785F(D4GHT7,F	TLP785F(GRH-T7,F
Manufacturer	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Product Status	Obsolete	Active	Active
Number of Channels	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	150% @ 5mA	50% @ 5mA	150% @ 5mA
Current Transfer Ratio (Max)	300% @ 5mA	600% @ 5mA	300% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs
Input Type	DC	DC	DC
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Mounting Type	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)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

TLP785F(GRH-T7,F is the primary parametric equivalent for the obsolete TLP781F(D4GRH-T7,F. This part maintains identical Current Transfer Ratio specifications (150% minimum, 300% maximum @ 5mA) and all critical electrical and mechanical parameters. The TLP785F(GRH-T7,F carries active product status with 1061 units in stock, ensuring supply continuity.

TLP785F(D4GHT7,F is a functional substitute with broader Current Transfer Ratio range (50% minimum, 600% maximum @ 5mA). This part is suitable for applications where the wider CTR specification does not conflict with circuit design requirements. Active product status and 828 units in stock provide alternative availability.

Both substitute parts are manufactured by Toshiba Semiconductor and Storage under the same compliance framework (ECCN: EAR99, HTSUS: 8541.49.8000) and share identical isolation voltage, package configuration, and thermal operating range with the original part.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(GRH-T7,F directly replace TLP781F(D4GRH-T7,F in existing designs?

A: Yes. The TLP785F(GRH-T7,F maintains identical Current Transfer Ratio specifications and all critical electrical parameters. Pin configuration, package dimensions, and thermal operating range are identical. No circuit modifications are required.

Q: What is the difference between TLP785F(D4GHT7,F and TLP785F(GRH-T7,F?

A: The primary difference is the Current Transfer Ratio specification. TLP785F(D4GHT7,F has a minimum CTR of 50% and maximum of 600% @ 5mA, while TLP785F(GRH-T7,F has a minimum CTR of 150% and maximum of 300% @ 5mA. Both parts are electrically and mechanically compatible with the original TLP781F(D4GRH-T7,F.

Q: Are all three parts in the same 4-DIP package?

A: Yes. All three parts use the 4-DIP (0.400", 10.16mm) through-hole package with identical pin spacing and mechanical dimensions.

Q: What is the isolation voltage rating for these optoisolators?

A: All three parts provide 5000Vrms isolation voltage, meeting the same galvanic isolation requirements.

Q: Are there any compliance or regulatory differences between these parts?

A: No. All three parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications and Moisture Sensitivity Level 1 (Unlimited) rating.

Q: Which substitute part should be selected for new designs?

A: TLP785F(GRH-T7,F is recommended for new designs due to active product status and parametric equivalence to the original part. This ensures long-term supply availability and design consistency.

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