Panasonic provides a recommended PCB layout and land pattern in their application notes, which can be found on their website. It's essential to follow these guidelines to ensure proper soldering and to prevent thermal issues.
To handle the high inrush current, it's recommended to use a soft-start circuit or an NTC thermistor in series with the relay coil to limit the inrush current. Additionally, a freewheeling diode can be used to reduce the voltage spike during switching.
The maximum allowable voltage drop across the relay contacts is typically around 100 mV to 200 mV, depending on the specific application and requirements. Exceeding this voltage drop can lead to contact degradation and reduced relay lifespan.
To ensure reliable relay operation in high-temperature environments, it's essential to consider the relay's temperature derating, use a suitable thermal interface material, and ensure good airflow around the relay. Additionally, selecting a relay with a high temperature rating, such as the DZ2S05100L, can help ensure reliable operation.
To reduce EMI, it's recommended to use a coil suppression method such as a resistor-capacitor (RC) snubber circuit or a diode clamp circuit in parallel with the relay coil. This helps to reduce the voltage spike and ringing during switching.
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