TLP781F(Y-TP7,F) Equivalent & Substitute Parts

Part Overview

The TLP781F(Y-TP7,F) is an optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-SMD surface mount package. 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 Part Number	TLP781F(Y-TP7,F)
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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TLP781F(Y-TP7,F) is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms (mandatory match)
Number of Channels: 1 channel (mandatory match)
Output Type: Transistor output (mandatory match)
Current Transfer Ratio Range: 50% to 150% @ 5mA (mandatory match)
Maximum Output Voltage: 80V (mandatory match)
Maximum Output Current: 50mA per channel (mandatory match)
Operating Temperature Range: -55°C ~ 110°C (mandatory match)
Package Configuration: 4-SMD, Gull Wing surface mount (mandatory match)

The substitute parts identified below meet all these electrical and mechanical parameters without deviation.

Parameter Comparison

Parameter	TLP781F(Y-TP7,F)	TLP785F(Y-TP7,F)	TLP785(Y-TP6,F)
Manufacturer	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
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
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	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Supplier Device Package	4-SMD	4-SMD	4-SMD
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

The TLP781F(Y-TP7,F) is obsolete and no longer in active production. Both substitute parts—TLP785F(Y-TP7,F) and TLP785(Y-TP6,F)—are active products from the same manufacturer with identical electrical and mechanical specifications.

TLP785F(Y-TP7,F) is the direct manufacturer equivalent, maintaining the same supplier device package designation (Y-TP7,F) as the original part. This variant is the primary choice for direct replacement.

TLP785(Y-TP6,F) is a parametric equivalent with an alternative supplier device package designation (Y-TP6,F). This part maintains full electrical compatibility and identical performance characteristics. The package designation difference reflects supplier or manufacturing revision but does not affect functional or mechanical compatibility in the 4-SMD, Gull Wing configuration.

Both substitute parts carry identical compliance certifications (ECCN: EAR99, HTSUS: 8541.49.8000) and moisture sensitivity ratings (MSL 1 - Unlimited).

Frequently Asked Questions (FAQ)

Q: Can TLP785F(Y-TP7,F) be used as a direct replacement for TLP781F(Y-TP7,F)?

A: Yes. The TLP785F(Y-TP7,F) is a direct manufacturer equivalent with identical electrical specifications, isolation voltage, output characteristics, and 4-SMD Gull Wing package configuration. The primary difference is product status: TLP785F is active while TLP781F is obsolete.

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

A: Both parts are parametrically equivalent with identical electrical performance. The difference lies in the supplier device package designation: Y-TP7,F versus Y-TP6,F. This reflects manufacturing or supplier revision but does not affect functional compatibility or mechanical fit in the 4-SMD, Gull Wing package.

Q: Are there any electrical performance differences between the original and substitute parts?

A: No. All three parts—TLP781F(Y-TP7,F), TLP785F(Y-TP7,F), and TLP785(Y-TP6,F)—share identical electrical specifications including isolation voltage (5000Vrms), current transfer ratio (50–150% @ 5mA), output voltage (80V max), output current (50mA), and operating temperature range (-55°C ~ 110°C).

Q: Can both substitute parts be used interchangeably in the same circuit?

A: Yes. Both TLP785F(Y-TP7,F) and TLP785(Y-TP6,F) meet all electrical and mechanical requirements for substitution. Selection between them may depend on supplier availability, inventory, or internal procurement specifications, but they are functionally interchangeable.

Q: What compliance certifications apply to these substitute parts?

A: All three parts carry identical compliance designations: ECCN EAR99 and HTSUS 8541.49.8000. Moisture sensitivity level is MSL 1 (Unlimited) for all variants.

Q: Is the 4-SMD Gull Wing package identical across all three parts?

A: Yes. All three parts use the same 4-SMD, Gull Wing surface mount package configuration with identical mechanical dimensions and land pattern requirements.

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