TLP781(Y-TP6,F) Equivalent & Substitute Parts

Part Overview

The TLP781(Y-TP6,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-SMD surface mount packages. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	150% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 110°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLP781(Y-TP6,F) are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

Single-channel configuration
5000Vrms isolation voltage
Current Transfer Ratio range: 50% to 150% @ 5mA
Transistor output type
Maximum output voltage: 80V
Maximum output current: 50mA per channel
Operating temperature range: -55°C to 110°C
4-SMD, Gull Wing surface mount package
MSL Level 1 (Unlimited)

All identified substitute parts maintain these electrical and mechanical specifications, ensuring functional compatibility within the same application context.

Parameter Comparison

Parameter	TLP781(Y-TP6,F)	TLP785(Y-TP6,F)	TLP785F(Y-TP7,F)
Manufacturer	Toshiba	Toshiba	Toshiba
Product Status	Obsolete	Active	Active
Number of Channels	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	150% @ 5mA	150% @ 5mA	150% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs
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	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
MSL Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

Direct Manufacturer Substitute: TLP785(Y-TP6,F)

The TLP785(Y-TP6,F) is the primary substitute for the obsolete TLP781(Y-TP6,F). Both parts are manufactured by Toshiba and share identical electrical specifications and package configuration. The TLP785(Y-TP6,F) maintains active product status, ensuring long-term availability and supply chain continuity. This part is suitable for direct replacement in existing designs without circuit modification.

Parametric Equivalent: TLP785F(Y-TP7,F)

The TLP785F(Y-TP7,F) is a parametric equivalent offering identical electrical performance and operating characteristics. This part differs only in the supplier device package designation (Y-TP7,F versus Y-TP6,F), which reflects internal Toshiba packaging variations. The TLP785F(Y-TP7,F) maintains active product status and full compliance with the same regulatory classifications (ECCN: EAR99, HTSUS: 8541.49.8000).

Both substitute parts are suitable for applications requiring 5000Vrms isolation, single-channel transistor output optoisolation, and surface mount implementation in 4-SMD gull wing packages.

Frequently Asked Questions (FAQ)

Q: Can the TLP785(Y-TP6,F) be used as a direct replacement for the TLP781(Y-TP6,F)?

A: Yes. The TLP785(Y-TP6,F) is electrically and mechanically identical to the TLP781(Y-TP6,F) across all specified parameters. The primary difference is product status: TLP785(Y-TP6,F) is active, while TLP781(Y-TP6,F) is obsolete. No circuit modifications are required.

Q: What is the difference between TLP785(Y-TP6,F) and TLP785F(Y-TP7,F)?

A: Both parts are parametric equivalents with identical electrical specifications. The difference lies in the supplier device package designation (Y-TP6,F versus Y-TP7,F), which represents internal Toshiba packaging variations. Both are suitable for the same applications.

Q: Are the substitute parts available in the same 4-SMD gull wing package?

A: Yes. Both TLP785(Y-TP6,F) and TLP785F(Y-TP7,F) are supplied in 4-SMD, Gull Wing surface mount packages, matching the original TLP781(Y-TP6,F) package configuration.

Q: Do the substitute parts maintain the same isolation voltage rating?

A: Yes. All substitute parts maintain the 5000Vrms isolation voltage specification of the original TLP781(Y-TP6,F).

Q: Are there any differences in operating temperature range?

A: No. All parts, including substitutes, operate across the identical temperature range of -55°C to 110°C.

Q: What is the current transfer ratio specification for the substitute parts?

A: The current transfer ratio for all parts, including substitutes, is 50% (minimum) to 150% (maximum) at 5mA input current.

Q: Do the substitute parts have the same regulatory classifications?

A: Yes. Both TLP785(Y-TP6,F) and TLP785F(Y-TP7,F) carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications as the original TLP781(Y-TP6,F).

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