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Product Detailed Parameters
- Description：PHOTOCOUPLER TRIAC 400V 6SMD
- Series：*
- Mfr：Vishay Semiconductor Opto Division
- Package：Tube
- Output Type：-
- Zero Crossing Circuit：-
- Number of Channels：-
- Voltage - Isolation：-
- Voltage - Off State：-
- Static dV/dt (Min)：-
- Current - LED Trigger (Ift) (Max)：-
- Current - On State (It (RMS)) (Max)：-
- Current - Hold (Ih)：-
- Turn On Time：-
- Voltage - Forward (Vf) (Typ)：-
- Current - DC Forward (If) (Max)：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Approval Agency：-
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Overview
The BRT21H is a Triac and SCR output optocoupler manufactured by Vishay Semiconductor Opto Division. It features a phototriac output with an integrated zero-crossing circuit, designed for precise phase-angle control applications. The device utilizes a DIP-6 package and provides high isolation voltage of 5300Vrms. Key electrical parameters include a peak repetitive off-state voltage (VDRM) of 400V, a forward trigger current (IFT) of 2mA maximum, and an RMS on-state current (IT(RMS)) of 300mA. It operates within a temperature range of -40°C to +100°C.
Feature Summary
- Integrated zero-crossing detection circuitry ensures switching occurs at the AC line voltage zero point, minimizing electromagnetic interference and inrush currents.
- Phototriac output structure enables direct interface with triac or SCR gates for efficient power control.
- High isolation voltage rating provides robust safety separation between input control circuits and high-voltage load sides.
Applications
- Solid-state relays requiring low noise switching
- Phase-angle control circuits for light dimmers
- Motor speed control systems
Procurement Notes
Verify the specific suffix code against the manufacturer's latest datasheet to confirm exact electrical tolerances and packaging options. Ensure the procurement channel provides original manufacturer documentation to validate RoHS compliance and authenticity. Cross-reference the ordering part number with Vishay's official database to avoid confusion with similar series variants.
Selection Notes
Select this component when zero-crossing switching is required to reduce electrical noise in AC power control applications. The 400V blocking voltage suits low-to-medium voltage AC loads. Consider the DIP-6 package for through-hole mounting requirements. Verify that the 300mA RMS current rating meets the load specifications without exceeding thermal limits.
Part Context
This component belongs to Vishay's BRT series of optocouplers featuring phototriac outputs. The series includes variants with different voltage ratings such as the BRT22H (600V) and BRT23H (800V). These devices are engineered for industrial and consumer AC power switching applications where galvanic isolation and noise reduction are critical design factors.
Replacement Considerations
Direct replacements may include Vishay BRT22H or BRT23H if higher voltage ratings are acceptable. Other manufacturers' zero-crossing phototriac optocouplers in DIP-6 packages can be considered, provided pinouts and electrical characteristics match the design requirements.
