OK1525E - Ohmite

OK1525E Frequently Asked Questions (FAQs)

• What is the thermal resistance of the OK1525E?
  The thermal resistance of the OK1525E is not explicitly stated in the datasheet, but according to Ohmite's application notes, the thermal resistance from junction to case (RθJC) is approximately 1.5°C/W, and from case to ambient (RθCA) is approximately 10°C/W.
• Can I use the OK1525E in a high-vibration environment?
  Yes, the OK1525E is designed to withstand high-vibration environments. Ohmite's testing shows that the resistor can withstand vibrations up to 10G peak acceleration, 10-2000 Hz frequency range, and 3-axis excitation.
• Is the OK1525E suitable for high-reliability applications?
  Yes, the OK1525E is designed for high-reliability applications. It is built with a rugged construction and has undergone rigorous testing to ensure its performance in harsh environments. Ohmite also offers a variety of screening options to further enhance the resistor's reliability.
• Can I use the OK1525E in a high-temperature environment?
  The OK1525E is rated for operation up to 155°C, but its power rating derates above 125°C. Ohmite recommends derating the power by 1.25% per degree Celsius above 125°C to ensure reliable operation.
• What is the recommended soldering profile for the OK1525E?
  Ohmite recommends a soldering profile with a peak temperature of 260°C, a dwell time of 10-15 seconds, and a ramp rate of 2-3°C/second. It's also important to ensure that the resistor is not exposed to temperatures above 260°C for more than 10 seconds.