High-surge SMD varistors offer the same electrical performance as leaded varistors. However, they are designed to significantly save space on the PCB.

Commonly used leaded varistors are through-hole components occupying both sides of the PCB, whereas the new SMD is mounted on one side only, leaving space for other components to be mounted on the opposite side of the PCB.

TDK offers various types of high-surge SMD varistors to meet a wide range of requirements and to find the perfect solution for the customer. They also come in two different orientations: horizontal and vertical.

TDK offers a unique SMD high-surge series, comprising SMD varistors with outstanding electrical performance and various product types to meet more application design requirements.

• Wider V_RMS range
• Larger operating temperature range
• Better I_max performance
• Space saving design
• AEC-Q200 qualification

For Sn-Pb eutectic assembly, we recommend profile features listed below. Average ramp-up rate is 3 °C per second max. Preheat between 100 °C to 150 °C, dwell time 60 - 120 seconds. Time maintained above 183 °C, dwell time 60 - 150 seconds. Peak classification temperature 220 - 240 °C, dwell time 10 - 30 seconds. Ramp-down rate 6 °C per second max. Time from 25 °C to peak temperature 6 minutes max.