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Vishay Semiconductor Opto Division VOT8125AB-T2
- Part No.:
- VOT8125AB-T2
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Triac, SCR Output Optoisolators
- Package:
- 6-SMD (5 Leads), Gull Wing
- Datasheet:
-
VOT8125AB-T2.pdf
- Description:
- OPTOCOUPLER 800V SMD-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,534
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Product details
Overview
VOT8125AB-T2 from Vishay Semiconductors is a non-zero-crossing phototriac optocoupler in DIP-6 package, designed to trigger external TRIACs or thyristors in AC load control circuits. It features 5 mA input trigger current, 800 V peak off-state blocking voltage, 100 mA RMS on-state output current, and 5000 VRMS isolation rating - enabling safe interface between microcontroller logic and 120–380 VAC mains in solid-state relay designs.
For engineers reviewing the VOT8125AB-T2 datasheet, VOT8125AB-T2 pinout, VOT8125AB-T2 application, or VOT8125AB-T2 equivalent, this device serves as a high-dV/dt (1000 V/μs), low-input-current isolation solution for industrial motor control, white goods, and 3-phase AC equipment where zero-crossing timing is not required.
Technical Context
The VOT8125AB-T2 integrates a GaAs infrared LED optically coupled to a photosensitive TRIAC die, with internal structure optimized for non-zero-crossing switching behavior. Its output stage lacks zero-crossing detection circuitry, allowing precise phase-angle control of AC loads.
It delivers 1000 V/μs static dV/dt immunity and supports 800 V peak off-state voltage, making it suitable for driving high-voltage TRIACs in noisy industrial environments. The 5 mA IFT enables direct drive from standard CMOS or MCU GPIO without buffer transistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Trigger Current (IFT) | 5 mA max - enables direct drive from 3.3 V or 5 V logic without external amplification |
| Peak Off-State Voltage (VDRM) | 800 V - supports operation on 380 VAC line with safety margin |
| RMS On-State Current (IT(RMS)) | 100 mA - sufficient to reliably trigger medium-power TRIACs (e.g., BT136, MAC97A6) |
| Isolation Voltage (VISO) | 5000 VRMS - certified to UL 1577 and DIN EN 60747-5-5 (VDE) for reinforced insulation |
| Static dV/dt | 1000 V/μs - prevents false triggering in high-noise AC environments (e.g., motor drives) |
| Holding Current (IH) | 400 μA typical - ensures stable conduction after triggering without gate re-firing |
| Ambient Temperature Range | −40 °C to +110 °C - qualified for industrial and appliance-grade thermal environments |
Pinout & Package
DIP-6 package (400 mil body width), through-hole mounting, creepage/clearance ≥ 8 mm per IEC/UL/VDE standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (LED) | Positive input for IR LED; requires current-limiting resistor from logic source |
| 2 | Cathode (LED) | LED return path; connects to ground or logic low |
| 3 | NC | No connection - internal float; must remain unconnected |
| 4 | MT1 (TRIAC Main Terminal 1) | Output terminal tied to AC load return path; referenced to neutral or lower potential |
| 5 | MT2 (TRIAC Main Terminal 2) | Output terminal connected to AC line or load hot side; carries full load current |
| 6 | Gate (TRIAC Gate) | Trigger input to external TRIAC - not internally driven; VOT8125AB-T2 acts as gate driver only |
Key Features
| Feature | Design Value |
|---|---|
| Non-zero-crossing output | Enables phase-angle dimming and precise timing control of AC loads, unlike zero-crossing variants |
| High dV/dt immunity (1000 V/μs) | Prevents spurious turn-on during voltage transients in motor or inductive load switching |
| Low IFT (5 mA) | Reduces drive circuit complexity and power consumption vs. higher-threshold optocouplers |
| 800 V VDRM rating | Supports global AC mains (120/240/380 VAC) with margin for surge and ringing |
| VDE + UL + cUL + CQC certification | Meets international safety requirements for reinforced insulation in end-equipment approvals |
Applications
| Motor Control | Solid-State Relay Driver |
|---|---|
|
Use Scenario: Controlling single-phase induction motors in HVAC blowers or washing machine drum drives using phase-angle firing. IC Role / Device Role / Timing Role: Non-zero-crossing phototriac providing isolated gate trigger pulses synchronized to AC zero-reference for variable speed control. Use Value: Enables smooth torque ramp-up and energy-efficient speed regulation without mechanical contact wear. |
Use Scenario: Driving the gate of a 40 A main TRIAC in an industrial SSR module handling 240 VAC resistive heating loads. IC Role / Device Role / Timing Role: Isolated trigger interface between MCU and high-power output stage; provides galvanic separation and noise immunity. Use Value: Eliminates need for discrete transistor-based gate drivers while maintaining 5000 VRMS safety isolation. |
| 3-Phase AC Equipment | White Goods Control |
|
Use Scenario: Phase-triggered control of three independent AC loads (e.g., pumps, compressors) in commercial refrigeration systems. IC Role / Device Role / Timing Role: One VOT8125AB-T2 per phase, delivering synchronized gate pulses to individual TRIACs under microcontroller PWM timing. Use Value: Allows independent load management with high noise immunity across all three phases in shared EMI environment. |
Use Scenario: Controlling heater elements and water valves in dishwashers and dryers via microcontroller-driven AC switching. IC Role / Device Role / Timing Role: Safety-isolated gate driver enabling precise on/off and duty-cycle control of 120/240 VAC loads. Use Value: Meets IEC 60335-1 household appliance safety requirements with certified 5000 VRMS isolation and VDE marking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phototriac driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VOT8125AD-V | DIP-6, 400 mil body; includes VDE certification but no tape-and-reel packaging | Same electrical specs and safety ratings; differs only in packaging format and reel option | Select VOT8125AD-V for manual or tray-based assembly; VOT8125AB-T2 for automated SMT placement with 180° orientation |
| MOC3021M | Zero-crossing output; 400 V VDRM; 15 mA IFT; UL-only certification (no VDE) | Not suitable for phase-control; limited to resistive loads due to lower voltage rating and lack of VDE compliance | Choose MOC3021M only for cost-sensitive, zero-crossing-only applications where VDE and 800 V capability are unnecessary |
Compared with VOT8125AD-V, VOT8125AB-T2 offers identical performance and VDE/UL safety certification but adds tape-and-reel packaging with 180° lead orientation for pick-and-place compatibility; versus MOC3021M, it provides higher voltage blocking, lower trigger current, and dual-agency certification essential for industrial and European-market designs.
Availability
VOT8125AB-T2 is available at Aetrix Electronics and suitable for solid-state relays, motor control modules, and 3-phase AC equipment requiring stable component supply, long-term lifecycle support, and globally certified safety isolation.
Supply support for VOT8125AB-T2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Semiconductors is a global leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power devices, and precision sensors for industrial and automotive markets.
The VOT8125A series is part of Vishay's optocoupler portfolio engineered for robust AC load switching in harsh environments - emphasizing high dV/dt immunity, low IFT, and multi-agency safety certification for industrial control and appliance applications.
FAQ
What is the isolation voltage rating of the VOT8125AB-T2?
The VOT8125AB-T2 has a rated withstand isolation voltage of 5000 VRMS per UL 1577 and DIN EN 60747-5-5 (VDE 0884-5), verified for 1 minute. Its transient isolation voltage is 8000 Vpeak, and repetitive peak isolation voltage is 1140 Vpeak for the DIP-6 package variant. These values confirm its suitability for reinforced insulation in Class I and II equipment.
Does the VOT8125AB-T2 include zero-crossing detection?
No, the VOT8125AB-T2 is explicitly a non-zero-crossing phototriac optocoupler. Its output triggers immediately upon LED activation, enabling phase-angle control rather than synchronous switching at AC zero crossings. This behavior is confirmed in the Vishay datasheet Rev. 1.2 section "DESCRIPTION" and distinguishes it from zero-crossing variants like the MOC30xx series.
Can the VOT8125AB-T2 drive an AC load directly?
No - the VOT8125AB-T2 is intended solely as a trigger device for external TRIACs or thyristors. Its 100 mA RMS on-state current is insufficient for direct load switching. The datasheet explicitly states: "This phototriac should not be used to drive a load directly. It is intended to be a trigger device only." Load current must be handled by a separate power semiconductor.
What is the maximum ambient temperature for continuous operation of the VOT8125AB-T2?
The VOT8125AB-T2 is rated for continuous operation from −40 °C to +110 °C ambient temperature, as specified in the Absolute Maximum Ratings table. Derating curves in Figures 1 and 2 show that forward current and on-state current decrease above 85 °C, but full functionality is maintained up to 110 °C with appropriate PCB thermal design.
What safety certifications does the VOT8125AB-T2 hold?
The VOT8125AB-T2 carries UL 1577, cUL, CQC, and DIN EN 60747-5-5 (VDE 0884-5) certifications - confirmed by the "V" option suffix and VDE logo marking per datasheet Figure 15. It meets creepage/clearance ≥ 8 mm and insulation thickness ≥ 0.4 mm, qualifying it for reinforced insulation in end-equipment complying with IEC 61000-4 and IEC 60335-1.
VOT8125AB-T2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- 6-SMD (5 Leads), Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Triac
- Zero Crossing Circuit:
- No
- Number of Channels:
- 1
- Voltage - Isolation:
- 5000Vrms
- Voltage - Off State:
- 800 V
- Static dV/dt (Min):
- 1kV/µs
- Current - LED Trigger (Ift) (Max):
- 5mA
- Current - On State (It (RMS)) (Max):
- 100 mA
- Current - Hold (Ih):
- 400µA (Typ)
- Turn On Time:
- -
- Voltage - Forward (Vf) (Typ):
- 1.2V
- Current - DC Forward (If) (Max):
- 50 mA
- Operating Temperature:
- -40°C ~ 110°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-SMD
- Approval Agency:
- CQC, cUL, UL, VDE
VOT8125AB-T2 FAQ
1.How can I place an order for VOT8125AB-T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for VOT8125AB-T2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VOT8125AB-T2 reliable?
The price and inventory of VOT8125AB-T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VOT8125AB-T2 is usually 5 days.
3.What payment methods are accepted for VOT8125AB-T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VOT8125AB-T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VOT8125AB-T2?
VOT8125AB-T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VOT8125AB-T2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VOT8125AB-T2?
For technical support, including VOT8125AB-T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VOT8125AB-T2 requirements.
6.How does Aetrix verify that VOT8125AB-T2 is sourced from the original manufacturer or authorized distributors?
All VOT8125AB-T2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VOT8125AB-T2 meets industry standards.
7.What is the process for return or replacement of VOT8125AB-T2?
All VOT8125AB-T2 units undergo pre-shipment inspection (PSI). If there is an issue with VOT8125AB-T2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VOT8125AB-T2 part is unused and in its original packaging.
Return procedure for VOT8125AB-T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VOT8125AB-T2 Tags
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