VOL617AT Equivalent & Substitute Parts

Part Overview

The VOL617AT is an optoisolator with phototransistor output manufactured by Vishay Semiconductor Opto Division. This component provides galvanic isolation with a 5000Vrms isolation voltage rating and single-channel transistor output configuration in a 4-SOP surface mount package. The part is currently active in production with 28,700 units in stock. Substitute parts are identified based on matching electrical specifications, isolation voltage, output characteristics, and mechanical packaging to ensure direct functional equivalence in circuit applications.

Substiute Parts

VOL617AT

Vishay Semiconductor Opto DivisionIn Stock: 28763VOL617AT Datasheet

Current PartRFQ

EL8171S1(TU)-G

Everlight Electronics Co LtdIn Stock: 5131EL8171S1(TU)-G Datasheet

Parametric EquivalentRFQ

TLP785(D4GH-T6,F

Toshiba Semiconductor and StorageIn Stock: 5102TLP785(D4GH-T6,F Datasheet

Parametric EquivalentRFQ

TLP785(D4GL-T6,F

Toshiba Semiconductor and StorageIn Stock: 4723TLP785(D4GL-T6,F Datasheet

Parametric EquivalentRFQ

TLP785(TP6,F)

Toshiba Semiconductor and StorageIn Stock: 7450TLP785(TP6,F) Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VOL617AT are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

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

All identified substitute parts meet these electrical and mechanical requirements, ensuring functional compatibility in applications designed for the VOL617AT.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products with current manufacturing status and meet the complete electrical and mechanical specification set of the VOL617AT.

EL8171S1(TU)-G (Everlight Electronics): This part is RoHS3 compliant and REACH unaffected. It exhibits superior Vce saturation performance at 200mV maximum compared to the VOL617AT at 400mV, indicating lower saturation voltage drop. Rise and fall times are specified at 6µs and 8µs respectively. This part is suitable for applications where lower saturation voltage is beneficial.

TLP785(TP6,F) (Toshiba Semiconductor): This variant provides RoHS compliance with 7,400 units in inventory. Turn-on and turn-off times are specified at 3µs each, with rise and fall times of 2µs and 3µs respectively, representing faster switching performance than the VOL617AT. Moisture sensitivity level is rated as 1 (Unlimited).

TLP785(D4GL-T6,F) (Toshiba Semiconductor): This variant is RoHS compliant with 4,710 units available. Switching characteristics match the TLP785(TP6,F) variant with 3µs turn-on/turn-off times and 2µs/3µs rise/fall times. Moisture sensitivity level is not applicable for this variant.

TLP785(D4GH-T6,F) (Toshiba Semiconductor): This variant is RoHS compliant with 5,006 units in stock. Switching performance is identical to other TLP785 variants. Moisture sensitivity level is not applicable.

All substitute parts maintain the same isolation voltage, output current capability, and operating temperature range as the VOL617AT, ensuring direct functional replacement in circuit designs.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters that determine if a part can substitute for the VOL617AT?

A: The critical parameters are isolation voltage (5000Vrms), single-channel configuration, transistor output type, current transfer ratio range (50% to 600% @ 5mA), maximum output voltage (80V), output current capability (50mA), saturation voltage, and operating temperature range (-55°C to 110°C). All substitute parts match these specifications.

Q: Are all substitute parts pin-compatible with the VOL617AT?

A: All substitute parts use the same 4-SMD gull wing package configuration with surface mount mounting type, ensuring mechanical and electrical pin compatibility for PCB layout purposes.

Q: What is the difference between the Toshiba TLP785 variants?

A: The three Toshiba TLP785 variants (TP6,F), (D4GL-T6,F), and (D4GH-T6,F) share identical electrical specifications and switching performance. The differences lie in packaging designations and moisture sensitivity level classifications. All three are functionally equivalent for circuit substitution.

Q: How does the EL8171S1(TU)-G differ from the Toshiba variants?

A: The EL8171S1(TU)-G exhibits lower Vce saturation at 200mV maximum compared to 400mV for the Toshiba variants and VOL617AT. This results in lower voltage drop across the transistor output stage. Rise and fall times are slightly slower at 6µs and 8µs respectively compared to the Toshiba parts at 2µs and 3µs.

Q: Can I use these substitute parts interchangeably in existing designs?

A: Yes. All substitute parts meet or exceed the electrical and mechanical specifications of the VOL617AT. Direct substitution is supported based on matching isolation voltage, output characteristics, current transfer ratio, and package configuration.

Q: What compliance certifications apply to these substitute parts?

A: The EL8171S1(TU)-G is RoHS3 compliant and REACH unaffected. All three Toshiba TLP785 variants are RoHS compliant. All parts carry EAR99 export classification and HTSUS code 8541.49.8000.

Q: Are there inventory considerations when selecting a substitute?

A: The VOL617AT has the highest inventory at 28,700 units. Among substitutes, TLP785(TP6,F) offers the largest availability at 7,400 units, followed by TLP785(D4GH-T6,F) at 5,006 units, EL8171S1(TU)-G at 5,099 units, and TLP785(D4GL-T6,F) at 4,710 units.