Taiwan Semiconductor

BZW04-28B

BZW04-28B Description

The BZW04-28B is a bidirectional Zener-type TVS (Transient Voltage Suppression) diode from Taiwan Semiconductor Corporation, designed for general-purpose circuit protection. It offers robust 28.2V reverse standoff voltage (Typ) and a minimum breakdown voltage of 31.4V, ensuring reliable clamping of transient voltages up to 45.7V at peak pulse current (Ipp). With a peak pulse power rating of 400W and 8.8A surge current handling (10/1000µs), this diode effectively safeguards sensitive electronics from voltage spikes, ESD, and inductive load switching events. Packaged in a DO-204AL (Tape & Reel) through-hole format, it is RoHS3 compliant and suitable for industrial environments.

BZW04-28B Features

• Bidirectional Protection: Single-channel design for clamping both positive and negative transients.
• High Surge Capability: Handles 8.8A peak pulse current (10/1000µs waveform) with 400W peak power dissipation.
• Precise Voltage Clamping: 45.7V maximum clamping voltage ensures minimal overshoot during transients.
• Low Leakage: Optimized for efficiency with 28.2V reverse standoff voltage (Typ).
• Robust Construction: DO-204AL package ensures mechanical durability and ease of assembly.
• Compliance: RoHS3, REACH Unaffected, and EAR99 classified for global market suitability.

BZW04-28B Applications

• Power Supply Protection: Shields DC rails in industrial controls, automotive systems, and telecom equipment.
• ESD Protection: Safeguards interfaces (USB, HDMI) in consumer electronics from electrostatic discharge.
• Inductive Load Switching: Mitigates voltage spikes from relays, motors, and solenoids.
• General-Purpose Circuit Protection: Ideal for PCB-level surge suppression in IoT devices, sensors, and power management ICs.

Conclusion of BZW04-28B

The BZW04-28B stands out for its balanced performance in surge suppression, low leakage, and bidirectional protection, making it a versatile choice for cost-sensitive yet reliability-critical designs. Its high power handling, precise clamping, and compliance with environmental standards make it superior to basic Zener diodes or unidirectional TVS alternatives. Engineers can confidently deploy it in automotive, industrial, and consumer applications where transient resilience is paramount.