SMDJ78A - LITTELFUSE

SMDJ78A Frequently Asked Questions (FAQs)

• What is the recommended land pattern for the SMDJ78A?
  The recommended land pattern for the SMDJ78A is a rectangular pad with a size of 2.5mm x 1.5mm, with a 0.5mm radius corner. The pad should be centered on the component and have a solder mask defined gap of 0.2mm.
• How do I handle the SMDJ78A during assembly to prevent damage?
  Handle the SMDJ78A by the body only, avoiding touching the leads or the glass passivation. Use an anti-static wrist strap or mat to prevent electrostatic discharge damage. Avoid bending or flexing the leads, and do not use excessive force during assembly.
• What is the maximum storage temperature for the SMDJ78A?
  The maximum storage temperature for the SMDJ78A is 30°C to 40°C (86°F to 104°F) with a relative humidity of 60% to 90%. Storage outside of these conditions may affect the device's reliability and performance.
• Can I use the SMDJ78A in a high-frequency circuit?
  The SMDJ78A is designed for low-frequency applications. While it can be used in high-frequency circuits, its performance may be affected by the device's internal capacitance and inductance. Consult with a qualified engineer or the manufacturer for specific guidance.
• How do I determine the correct orientation of the SMDJ78A during assembly?
  The SMDJ78A has a polarity marker on the component body, which indicates the cathode (negative) lead. Ensure the polarity marker is aligned with the corresponding pad on the PCB to prevent incorrect assembly.