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SMCJ33A Unidirectional Transient Voltage Suppressor TVS Diode

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SMCJ33A Unidirectional Transient Voltage Suppressor TVS Diode

SMCJ33A is a unidirectional transient voltage suppressor (TVS) diode designed to protect sensitive electronic circuits from voltage transients such as electrostatic discharge (ESD),

lightning surges, and inductive load switching.

Key Features of SMCJ33A

  1. High Power Handling

    • 1500W peak pulse power dissipation (10/1000µs waveform) for robust surge protection

    • Fast response time (typically <1.0ps) to clamp transient voltages quickl

  2. Electrical Characteristics

    • Reverse standoff voltage (VRWM): 33V (typical)

    • Breakdown voltage (VBR): 36.7V (min) to 40.6V (max) at 1mA test current

    • Clamping voltage (VC): 53.3V (max) at 28.2A peak pulse current (IPP)

    • Low leakage current: ≤5µA at VRWM.

  3. Robust Design

    • Glass-passivated junction for reliability

    • Surface-mount (SMC/DO-214AB) package (7.11×6.22×2.42mm) for space-constrained PCB designs

    • Halogen-free & RoHS compliant

  4. Thermal Performance

    • Wide operating temperature range: -55°C to +150°C

    • High-temperature soldering resistance: 260°C for 40 seconds (reflow compatible)


Applications


The is widely used in:

  • Telecommunications: Protection of base stations, routers, and modems from lightning surges

  • Industrial Electronics: PLCs, motor drives, and power supplies

  • Consumer Electronics: USB/HDMI ports, power lines in smartphones/laptops

  • Automotive Systems: CAN bus, infotainment, and battery management circuits

  • Energy Storage & Power Distribution: Solar inverters, UPS systems

Technical Summary

  • Package: DO-214AB (SMC).

  • Peak Pulse Current (IPP): 28.2A (10/1000µs)

  • Equivalent Models: SMBJ33A, P6KE33A (lower power alternatives)

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