TLP785F(D4-TP7,F) Equivalent & Substitute Parts

Part Overview

The TLP785F(D4-TP7,F) is an optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation in a 4-SMD surface mount package, designed for applications requiring high-voltage galvanic isolation with DC input and transistor output configuration. The part is currently active in production with 992 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific packaging preferences.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP785F(D4-TP7,F)
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 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
Product Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLP785F(D4-TP7,F) are qualified based on the following critical parameters that determine functional equivalence:

Voltage - Isolation: 5000Vrms (all substitutes match)
Number of Channels: 1 (all substitutes match)
Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA (all substitutes match)
Input Type: DC (all substitutes match)
Output Type: Transistor (all substitutes match)
Voltage - Output (Max): 80V (all substitutes match)
Current - Output / Channel: 50mA (all substitutes match)
Operating Temperature: -55°C ~ 110°C (all substitutes match)
Mounting Type: Surface Mount (all substitutes match)
Package / Case: 4-SMD, Gull Wing (all substitutes match except VOL617AT which uses 4-SOP)

Substitutes are grouped into two categories: Toshiba TLP785 variants with identical base product specifications, Everlight EL8171S1(TU)-G with equivalent electrical performance, and Vishay VOL617AT with equivalent electrical performance but different supplier device package designation.

Parameter Comparison

Parameter	TLP785F(D4-TP7,F)	TLP785(D4GH-T6,F)	TLP785(D4GL-T6,F)	TLP785(TP6,F)	EL8171S1(TU)-G	VOL617AT
Manufacturer	Toshiba	Toshiba	Toshiba	Toshiba	Everlight	Vishay
Number of Channels	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs	3µs, 3µs	—	6µs, 5.5µs
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs	2µs, 3µs	6µs, 8µs	4.6µs, 5µs
Input Type	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.15V	1.2V	1.16V
Current - DC Forward (If) (Max)	60mA	60mA	60mA	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV	200mV	400mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-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	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Product Status	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	Not specified
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Not Applicable	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts maintain active product status and are manufactured by established semiconductor suppliers. The Toshiba TLP785 variants (TLP785(D4GH-T6,F), TLP785(D4GL-T6,F), and TLP785(TP6,F)) provide direct functional equivalence with identical electrical specifications and are differentiated primarily by packaging format (Tape & Reel) and RoHS compliance certification. These variants are preferred for applications requiring documented RoHS compliance.

The Everlight EL8171S1(TU)-G offers equivalent isolation voltage, current transfer ratio range, and output specifications. This part exhibits lower Vce saturation (200mV vs 400mV) and slower rise/fall times (6µs, 8µs vs 2µs, 3µs), making it suitable for applications where switching speed is not critical and lower saturation voltage is beneficial. ROHS3 compliance is documented.

The Vishay VOL617AT provides equivalent electrical performance across all critical parameters with comparable turn-on/turn-off and rise/fall times. The supplier device package designation differs (4-SOP vs 4-SMD), requiring verification of PCB footprint compatibility. This part offers the highest inventory availability (28,700 units) among all substitutes.

Frequently Asked Questions (FAQ)

Q: Can TLP785(D4GH-T6,F), TLP785(D4GL-T6,F), and TLP785(TP6,F) be used interchangeably with TLP785F(D4-TP7,F)?

A: Yes. All three Toshiba variants maintain identical electrical specifications including isolation voltage (5000Vrms), current transfer ratio (50–600% @ 5mA), output voltage (80V max), output current (50mA), and operating temperature range (-55°C ~ 110°C). Differences are limited to packaging format and RoHS certification status. PCB footprint compatibility must be confirmed for the specific packaging variant selected.

Q: What are the key differences between EL8171S1(TU)-G and the TLP785F(D4-TP7,F)?

A: The EL8171S1(TU)-G maintains equivalent isolation voltage, current transfer ratio, and output specifications. Notable differences include lower Vce saturation (200mV vs 400mV) and slower switching characteristics (rise/fall time 6µs, 8µs vs 2µs, 3µs). The lower saturation voltage reduces power dissipation in the output transistor. Applications requiring fast switching response should retain the TLP785F(D4-TP7,F) or equivalent Toshiba variants.

Q: Is VOL617AT compatible with TLP785F(D4-TP7,F) in terms of electrical performance?

A: Yes. The VOL617AT matches all critical electrical parameters: 5000Vrms isolation, 50–600% current transfer ratio, 80V maximum output voltage, and 50mA output current. The supplier device package designation (4-SOP) differs from the main part (4-SMD), requiring PCB footprint verification. Switching characteristics are comparable (turn-on/turn-off 6µs, 5.5µs; rise/fall 4.6µs, 5µs).

Q: Which substitute part has the best availability?

A: VOL617AT has the highest inventory level at 28,700 units in stock, compared to 5,006 units for TLP785(D4GH-T6,F), 4,710 units for TLP785(D4GL-T6,F), and 7,400 units for TLP785(TP6,F).

Q: Are all substitute parts RoHS compliant?

A: RoHS compliance status varies. TLP785(D4GH-T6,F), TLP785(D4GL-T6,F), and TLP785(TP6,F) are documented as RoHS Compliant. EL8171S1(TU)-G is ROHS3 Compliant. RoHS status for TLP785F(D4-TP7,F) and VOL617AT is not specified in the provided data.

Q: What is the significance of Moisture Sensitivity Level (MSL) differences?

A: TLP785(D4GH-T6,F) and TLP785(D4GL-T6,F) are listed as "Not Applicable" for MSL, indicating these Tape & Reel packaged variants do not require moisture sensitivity classification. The remaining parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

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