BLM21BB331SH1D - Murata Electronics

BLM21BB331SH1D Frequently Asked Questions (FAQs)

• What is the recommended land pattern for the BLM21BB331SH1D?
  The recommended land pattern for the BLM21BB331SH1D is a rectangular pad with a size of 2.5mm x 1.6mm, with a non-solder mask defined (NSMD) pad shape. The pad should be centered on the component and have a solder mask opening of 2.2mm x 1.3mm.
• How do I handle the BLM21BB331SH1D's sensitivity to soldering temperature?
  To minimize the risk of damage, it's recommended to follow the recommended soldering temperature profile: 260°C (max) for 10 seconds (max) when using a reflow soldering process. Hand soldering is not recommended due to the risk of overheating.
• What is the maximum current rating for the BLM21BB331SH1D?
  The maximum current rating for the BLM21BB331SH1D is 2.5A (rms) at 100kHz, with a temperature rise of 40°C. However, the actual current rating may vary depending on the operating frequency, temperature, and other application-specific factors.
• Can I use the BLM21BB331SH1D in a high-temperature environment?
  The BLM21BB331SH1D is rated for operation up to 125°C. However, the inductor's characteristics may change at high temperatures, and its performance may degrade. It's recommended to consult with Murata's application engineers or perform thorough testing to ensure the component meets the specific application requirements.
• How do I ensure the BLM21BB331SH1D is properly secured to the PCB?
  To ensure the BLM21BB331SH1D is properly secured to the PCB, apply a sufficient amount of solder paste to the pads, and use a reflow soldering process. Additionally, consider using a component adhesive or a mechanical fastening method to prevent the component from shifting during assembly or operation.