SQE48T30 DC-DC Series Data Sheet
36-75 VDC Input; 1.2-3.3 VDC @ 30 A Output
Features
• RoHS lead-free solder and lead-solder-exempted
products are available
• Delivers up to 30 A
• Industry-standard quarter-brick pinout
• Outputs available: 3.3, 2.5, 1.8, 1.5, and 1.2 VDC
• On-board input differential LC-filter
• Start-up into pre-biased load
• No minimum load required
• Weight: 0.72 oz [20.6 g]
• Meets Basic Insulation requirements of EN60950
• Withstands 100 V input transient for 100 ms
• Fixed-frequency operation
Applications
• Fully protected
• Telecommunications
• Data communications
• Wireless communications
• Servers, workstations
• Remote output sense
• Positive or negative logic ON/OFF option
• Latching and non-latching protection available
• Output voltage trim range: +10%/−20% with
industry-standard trim equations (except 1.2 Vout)
• High reliability: MTBF = 15.75 million hours,
calculated per Telcordia TR-332, Method I Case 1
Benefits
• UL60950 recognized in US and Canada and certified
per IEC/EN60950
• High efficiency – no heat sink required
• Higher current capability at elevated temperatures
• Designed to meet Class B conducted emissions per
than competitors’ 30 A quarter-bricks
FCC and EN55022 when used with external filter
• Industry standard 1/8th brick footprint: 0.896” x
2.30” (2.06 in2), 38% smaller than conventional
quarter-bricks
• All materials meet UL94, V-0 flammability rating
Description
The high temperature 30A SQE48 Series of DC-DC converters provides a high efficiency single output, in a 1/8th
brick package that is only 62% the size of the industry-standard quarter-brick. Specifically designed for operation
in systems that have limited airflow and increased ambient temperatures, the SQE48T30 converters utilize the
same pinout and functionality of the industry-standard quarter-bricks.
The 30 A SQE48 Series converters provide thermal performance in high temperature environments that exceeds
most competitors' 30A quarter-bricks. This performance is accomplished through the use of patented/patent-
pending circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal
management, and a 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
electronic circuits and thermal design, results in a product with extremely high reliability.
Operating from a 36-75 V input, the SQE48T30 converters provide any standard output voltage from 3.3 V down
to 1.2 V that can be trimmed from –20% to +10% of the nominal output voltage (±10% for output voltage 1.2 V),
thus providing outstanding design flexibility.
With standard pinout and trim equations, the SQE48 Series converters are perfect drop-in replacements for
existing 30 A quarter-brick designs. Inclusion of this converter in a new design can result in significant board space
and cost savings. The designer can expect reliability improvement over other available converters because of the
SQE48 Series’ optimized thermal efficiency.
ZD-01961 Rev. 2.1, 17-Mar-11
www.power-one.com
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