VOS617A-2T Optoisolator: Equivalent & Substitute Parts

Part Overview

The VOS617A-2T is an active optoisolator manufactured by Vishay Semiconductor Opto Division, designed for high-voltage isolation applications. This single-channel transistor output optoisolator provides 3750Vrms isolation with a 4-SSOP surface mount package. The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified based on matching electrical isolation ratings, output configuration, package compatibility, and operating temperature range. Alternative sources and packaging formats are available from Everlight Electronics Co Ltd, offering equivalent or enhanced performance characteristics within the same mechanical footprint.

Substiute Parts

VOS617A-2T

Vishay Semiconductor Opto DivisionIn Stock: 1192VOS617A-2T Datasheet

Current PartRFQ

VOS617A-2X001T

Vishay Semiconductor Opto DivisionIn Stock: 60369VOS617A-2X001T Datasheet

Parametric EquivalentRFQ

EL3H7(A)(EA)-G

Everlight Electronics Co LtdIn Stock: 2858EL3H7(A)(EA)-G Datasheet

MFR RecommendedRFQ

EL3H7(A)-G

Everlight Electronics Co LtdIn Stock: 2115EL3H7(A)-G Datasheet

MFR RecommendedRFQ

EL3H7(B)(TA)-VG

Everlight Electronics Co LtdIn Stock: 1519EL3H7(B)(TA)-VG Datasheet

MFR RecommendedRFQ

EL3H7(B)-G

Everlight Electronics Co LtdIn Stock: 1683EL3H7(B)-G Datasheet

MFR RecommendedRFQ

EL3H7(EA)-VG

Everlight Electronics Co LtdIn Stock: 3901EL3H7(EA)-VG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VOS617A-2T is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Isolation: 3750Vrms
• Output Type: Transistor
• Number of Channels: 1
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Operating Temperature Range: -55°C ~ 110°C
• Mounting Type: Surface Mount
• Package / Case: 4-SOIC (0.173", 4.40mm Width)
• Supplier Device Package: 4-SSOP

Variable Parameters (Allowed to Differ):

• Current Transfer Ratio (Min/Max)
• Turn On / Turn Off Time
• Rise / Fall Time
• Voltage - Forward (Vf)
• Vce Saturation
• Packaging Format (Tape & Reel, Tube, Cut Tape)

All identified substitutes maintain identical isolation voltage, output configuration, thermal operating range, and mechanical package specifications. Variations in current transfer ratio and switching characteristics reflect different performance grades within the same functional family.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the VOS617A-2T. Selection between substitutes depends on application-specific performance requirements and packaging availability.

Vishay Internal Substitutes: VOS617A-2X001T is a direct parametric equivalent with identical electrical specifications and thermal characteristics. This part differs only in packaging format (Tape & Reel) and represents the primary internal substitute within the Vishay product line.

Everlight Electronics Alternatives: The EL3H7 series from Everlight Electronics provides functional equivalence across five distinct performance grades, each maintaining the mandatory isolation voltage, output configuration, and package specifications. Selection among EL3H7 variants depends on current transfer ratio requirements and switching time tolerance:

EL3H7(A)(EA)-G and EL3H7(A)-G offer current transfer ratios between 80% and 160%, with reduced Vce saturation (200mV vs. 400mV). These grades provide improved output saturation performance compared to the VOS617A-2T baseline.

EL3H7(B)(TA)-VG and EL3H7(B)-G deliver higher current transfer ratios between 130% and 260%, suitable for applications requiring enhanced optical coupling efficiency. Vce saturation remains at 200mV.

EL3H7(EA)-VG spans the widest current transfer ratio range (50% to 600%), accommodating applications with variable input current conditions. This grade provides maximum flexibility in circuit design but requires careful input current management.

All Everlight substitutes feature identical isolation voltage, output voltage rating, output current capacity, and operating temperature range. Packaging format variations (Tape & Reel, Tube, Cut Tape) accommodate different assembly and procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can EL3H7 series parts directly replace VOS617A-2T in existing designs?

A: Yes, all EL3H7 variants are mechanically and electrically compatible. The 4-SOIC package footprint is identical, and isolation voltage, output configuration, and thermal operating range match exactly. Circuit performance may differ due to variations in current transfer ratio and Vce saturation characteristics. Design validation is necessary if the application depends on specific switching speed or output impedance characteristics.

Q: What is the difference between VOS617A-2T and VOS617A-2X001T?

A: These parts are parametric equivalents with identical electrical specifications. The primary difference is packaging format: VOS617A-2T is supplied in Tape & Reel format, while VOS617A-2X001T is also Tape & Reel. Both maintain the same isolation voltage, current transfer ratio range, and thermal performance. Selection depends on inventory availability and procurement requirements.

Q: How do current transfer ratio variations affect circuit design?

A: Current transfer ratio determines the optical coupling efficiency between input LED and output transistor. The VOS617A-2T specifies 63% to 125% at 5mA input current. Everlight EL3H7 variants range from 50% to 600% depending on grade. Higher current transfer ratios reduce required input current for a given output response. Lower ratios require higher input drive current. Circuit design must account for the specific grade's current transfer ratio to ensure proper output switching and signal integrity.

Q: Are all substitutes available in the same packaging formats?

A: No. VOS617A-2T and VOS617A-2X001T are supplied in Tape & Reel format. Everlight EL3H7 variants are available in multiple formats: EL3H7(A)(EA)-G and EL3H7(EA)-VG in Tape & Reel, EL3H7(A)-G and EL3H7(B)-G in Tube, and EL3H7(B)(TA)-VG in Cut Tape with Digi-Reel. Packaging selection depends on assembly equipment compatibility and procurement volume requirements.

Q: What does Vce saturation difference mean for circuit performance?

A: Vce saturation is the collector-emitter voltage when the output transistor is fully saturated (conducting). VOS617A-2T specifies 400mV maximum, while all Everlight EL3H7 variants specify 200mV maximum. Lower saturation voltage reduces power dissipation in the output transistor and improves noise margin in digital circuits. This represents an improvement in Everlight parts for applications sensitive to output impedance or power consumption.

Q: Are all parts ROHS3 compliant?

A: Yes. VOS617A-2T, VOS617A-2X001T, and all EL3H7 variants are ROHS3 compliant. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no special moisture control requirements during storage or assembly.

Q: What is the significance of the 4-SSOP package designation?

A: 4-SSOP refers to the supplier device package format. The physical package is 4-SOIC with 0.173" width and 4.40mm body width. This is a standard surface mount package compatible with automated assembly equipment. All identified substitutes use the identical package specification, ensuring PCB footprint compatibility and assembly process compatibility.