Overview
The SMAJ190(C)A is a surface-mount TVS diode designed to safeguard electronic circuits from transient voltage spikes and electrostatic discharge (ESD). It is part of the SMAJ series, known for its high reliability and compact form factor. The diode operates with a breakdown voltage of 190V, making it suitable for medium-voltage applications. TVS diodes like the SMAJ190(C)A are essential in modern electronics, where voltage transients can damage sensitive components. Its fast response time (typically in picoseconds) ensures immediate protection, while its low clamping voltage minimizes stress on protected circuits. These characteristics make it a preferred choice for industrial, automotive, and telecommunications systems.
Structure and Working Principle
The SMAJ190(C)A is constructed using silicon semiconductor technology, featuring a PN junction optimized for transient suppression. When a voltage spike exceeds the diode's breakdown voltage, it rapidly conducts current, diverting the excess energy away from the protected circuit. The diode's working principle relies on avalanche breakdown, a phenomenon where the diode enters a low-resistance state under high voltage. This action clamps the voltage to a safe level, preventing damage to downstream components. The SMAJ190(C)A's design ensures minimal leakage current during normal operation, maintaining system efficiency.
Key Features
The SMAJ190(C)A offers several standout features, including a 190V breakdown voltage and a low clamping voltage, which ensures effective protection without compromising circuit performance. Its fast response time (typically <1 ns) makes it ideal for high-speed applications. Additionally, the diode is housed in a compact SMA (DO-214AC) package, suitable for high-density PCB layouts. It meets industry standards for reliability, including IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), making it a robust solution for demanding environments.
Application Areas
The SMAJ190(C)A is widely used in telecommunications equipment, where voltage spikes from lightning or power surges are common. It is also employed in industrial control systems, automotive electronics, and power supply units to protect sensitive components. In automotive applications, the diode safeguards onboard electronics from load-dump events and other transient voltages. Its reliability and compact size make it suitable for space-constrained designs, such as infotainment systems and engine control modules.
Maintenance and Precautions
To ensure optimal performance, the SMAJ190(C)A should be installed with correct polarity, as reverse installation can render it ineffective. Avoid exposing the diode to voltages or currents beyond its specified ratings, as this may cause permanent damage. Regular inspection of the diode and surrounding circuitry is recommended, especially in harsh environments. Ensure proper soldering techniques are used during assembly to prevent thermal stress, which could affect longevity.
B2B Procurement Guide
When procuring the SMAJ190(C)A in bulk, verify the supplier's certifications (e.g., ISO 9001) to ensure product quality. Request samples for testing if necessary, especially for critical applications. Compare pricing from multiple vendors, as bulk purchases (e.g., 1,000+ units) often yield significant discounts. Confirm lead times and inventory availability to avoid project delays. For custom requirements, some manufacturers offer tailored solutions, such as alternative packaging or enhanced specifications.
Related Manufacturers
- 主营：二极管、稳压器、lmv358sop-8、cj/长电长、az23c20sot-23、2sa1201sot-89、2sa1013sot-89、2sa1740sot-89、2sd1616ato-92、2sa1037sot-23、az23c12sot-23、2sa1036sot-23、2sa1585sot-23、2sa1204sot-89、az23c16sot-23、1sma4759asmag、cje3139ksot-523、mbr10150to-220a、iccj431sot-89-3l、lmv358msop8、长电长晶、集成电路、恒压变压器