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

Part Overview

The TLP781F(YH-TP7,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 packaging. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP781F(YH-TP7,F)
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	75% @ 5mA
Current Transfer Ratio (Max)	150% @ 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	Surface Mount
Package / Case	4-SMD, Gull Wing
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

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

Single-channel configuration
5000Vrms isolation voltage
Transistor output topology
Current transfer ratio range: 75% to 150% @ 5mA
Maximum output voltage: 80V
Maximum output current: 50mA per channel
DC input type
4-SMD surface mount package with gull wing leads
Operating temperature range: -55°C to 110°C
Vce saturation maximum: 400mV
Forward voltage: 1.15V typical
Maximum forward current: 60mA

All identified substitute parts maintain identical electrical and mechanical specifications across these parameters, ensuring functional compatibility in applications designed for the TLP781F(YH-TP7,F).

Parameter Comparison

Parameter	TLP781F(YH-TP7,F)	TLP785F(YH-TP7,F)	TLP785(D4YH-T6,F)	TLP785(YH-TP6,F)
Manufacturer	Toshiba	Toshiba	Toshiba	Toshiba
Number of Channels	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	75% @ 5mA	75% @ 5mA	75% @ 5mA	75% @ 5mA
Current Transfer Ratio (Max)	150% @ 5mA	150% @ 5mA	150% @ 5mA	150% @ 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	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Product Status	Obsolete	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Not Applicable	1 (Unlimited)

Engineering Selection Recommendations

The TLP781F(YH-TP7,F) is classified as obsolete. Direct substitutes are available from Toshiba Semiconductor and Storage in the active product status category.

TLP785F(YH-TP7,F) and TLP785(YH-TP6,F) are functionally equivalent alternatives with active product status and identical electrical and mechanical specifications. Both maintain MSL Level 1 classification.

TLP785(D4YH-T6,F) is a parametric equivalent supplied in Tape & Reel packaging with active product status and RoHS compliance certification. This variant differs only in packaging format and MSL classification (Not Applicable).

All three substitute parts satisfy the complete parameter set of the original TLP781F(YH-TP7,F) and are suitable for direct replacement in applications requiring single-channel 5000Vrms isolation with transistor output in 4-SMD surface mount configuration.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(YH-TP7,F) directly replace TLP781F(YH-TP7,F)?

A: Yes. Both parts share identical electrical specifications including isolation voltage, current transfer ratio, timing characteristics, output voltage and current ratings, and operating temperature range. Both use 4-SMD gull wing surface mount packaging. The primary difference is product status: TLP781F is obsolete while TLP785F is active.

Q: What is the difference between TLP785(D4YH-T6,F) and TLP785F(YH-TP7,F)?

A: Both parts are parametrically equivalent with identical electrical performance. The differences are: TLP785(D4YH-T6,F) is supplied in Tape & Reel packaging format, carries RoHS compliance certification, and has MSL classification listed as Not Applicable. TLP785F(YH-TP7,F) has MSL Level 1 (Unlimited). Electrical functionality is identical.

Q: Are all substitute parts available in the same package configuration?

A: All substitute parts use 4-SMD surface mount packaging with gull wing leads, matching the original TLP781F(YH-TP7,F) package specification. TLP785(D4YH-T6,F) differs only in supply format (Tape & Reel) rather than the physical package itself.

Q: What parameters must remain constant for substitution compatibility?

A: Critical parameters for substitution are: single-channel configuration, 5000Vrms isolation voltage, transistor output type, 75-150% current transfer ratio at 5mA, 80V maximum output voltage, 50mA maximum output current, DC input, 4-SMD gull wing package, and -55°C to 110°C operating temperature range.

Q: Can TLP785(YH-TP6,F) be used as a substitute?

A: Yes. TLP785(YH-TP6,F) maintains all electrical and mechanical specifications of the TLP781F(YH-TP7,F). The part number suffix difference reflects internal Toshiba product coding and does not affect functional compatibility.

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