Datasheet

UCQ-2.5/40-D24 UCQ-2.5/30-D48 UCQ-3.3/35-D24 UCQ-3.3/20-D48 UCQ-3.3/30-D48
Isolation Voltage
Input to Output,
Volts min.
2250
Input to baseplate,
Volts min.
1500
Baseplate to output,
Volts min.
1500
Isolation resistance, MΩ 10-100, model dependent
Isolation capacitance, pF 1000
Isolation safety rating Basic insulation
Miscellaneous
Current limit inception
(98% of Vout, after
warmup), Amps
46 37 41 24 35
Short circuit protection
method
Current limiting, hiccup autorestart. Remove overload for recovery.
Short circuit current,
Amps
5 12 5
Short circuit duration Continuous, output shorted to ground. No damage.
Overvoltage protection,
Volts (via magnetic
feedback)
2.95 2.95 4 4.6 4
Dynamic characteristics
Dynamic load response
(50-75-50% load step)
200 µSec to ±1%
of final value
200 µSec to ±1%
of final value
200 µSec to ±1%
of final value
200 µSec to ±1.5%
of final value
200 µSec to ±1%
of final value
Start-up time
Vin to Vout regulated,
mSec
10 max.
Remote On/Off to Vout
regulated, mSec
10 max.
Switching frequency, KHz 480 480 ± 30 350 ± 10 330 ± 40 330 ± 40
Environmental
Calculated MTBF 2.1M hours 2.2M hours 1.7M hours 1.8M hours 1.7M hours
Operating temperature
range, °C
See Derating curves.
−40 to +85, with derating
Operating case
temperature, °C
(no derating)
−40 to +120, model dependent
Storage temperature
range, °C
−55 to +125
Thermal protection/
shutdown, °C
110-125, model dependent
Relative humidity To +85°C/85%, non-condensing
FUNCTIONAL SPECIFICATIONS
➀ Specs are typical unless noted.
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Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC-DC Converters
MDC_UCQ Models.E02 Page 7 of 24