Bel Fuse QM48T25050-NDB0G

The QM Series of high current single output DC-DC converters sets new standards for thermal performance and power density in the quarter-brick package. The QM48T/S25050 converters of the QM Series provide thermal performance in high temperature environments that is comparable to or exceeds the industry’s leading 5 V half-bricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultrahigh efficiency, excellent thermal management, and a very low body profile. Low body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced electric and thermal design, results in a product with extremely high reliability. Operating from a 36 - 75 V input, the QM Series converters provide outputs that can be trimmed from -20% to +10% of the nominal output voltage, thus providing outstanding design flexibility.

• RoHS lead-free solder and lead-solder-exempted products are available
• Delivers up to 25 A @ 5.0 V
• Industry-standard quarter brick pinout
• On-board input differential LC-filter
• High efficiency – no heat sink required
• Start-up into pre-biased output
• No minimum load required
• Available in through-hole and surface-mount packages
• Low profile: 0.28” [7.1 mm] SMT version, 0.31” [7.9 mm] TH version
• Low weight: 1.1 oz [31.5 g] typical
• Meets Basic Insulation requirements of EN 60950-1
• Withstands 100 V input transient for 100 ms
• Fixed-frequency operation
• Fully protected
• Remote output sense
• Output voltage trim range: +10%/-20% with industry-standard trim equations
• High reliability: MTBF of 2.6 million hours, calculated per Telcordia TR-332, Method I Case 1
• Positive or negative logic ON/OFF option
• Approved to the following safety standards: UL/CSA 60950-1, EN 62368-1, IEC 60950-1 & IEC 62368-1
• Meets conducted emissions requirements of FCC Class B and EN 55022 Class B with external filter
• All materials meet UL94, V-0 flammability rating