Datasheet
TYPICAL PERFORMANCE CURVES
4 8 12 16 20 24 28 32 36 40
0
2
4
6
8
10
12
14
16
18
20
22
40
45
50
55
60
65
70
75
80
85
90
95
UCQ-1.8/40-D48 Efficiency and Power Dissipation @25˚ C
Load Current (Amps)
Efficiency (%)
Power Dissipation (watts)
V
IN
= 36V
V
IN
= 75V
V
IN
= 48V
Power Dissipation
V
IN
= 48V
30 35 40 45 50 55 60 65 70 75 80 85
0
5
10
15
20
25
30
35
40
45
UCQ-1.8/40-D48 Maximum Current Temperature Derating at Sea Level
(VIN = 48V, no baseplate, airflow is from Vin to Vout)
Output Current (Amps)
Ambient Temperature (
°
C)
400 LFM
200 LFM
300 LFM
100 LFM
Natural Convection
V
IN
= 48V
V
IN
= 75V
V
IN
= 36V
UCQ-2.5/30-D48 Efficiency vs Line Voltage and Load Current @25˚ C
Efficiency (%)
40
50
55
65
75
60
70
85
80
90
45
95
Load Current (Amps)
631 9 12 15 18 21 24 27 30
3 6 9
70
75
85
95
80
90
65
60
55
50
12 15 18 21 24 27 30 33 36 39 40
V
IN
= 24V
V
IN
= 35V
Efficiency (%)
Load Current (Amps)
V
IN
= 18V
UCQ-2.5/40-D24 Efficiency vs Line Voltage and Load Current @25˚ C
Output Current (Amps)
Ambient Temperature (
°
C)
400 LFM
200 LFM
300 LFM
100 LFM
0
10
15
25
35
20
30
5
3530 40 45 50 55 60 65 70 75 80
UCQ-2.5/30-D48 Maximum Current Temperature Derating
No baseplate, V
IN
= 24V (at sea level)
Output Current (Amps)
Ambient Temperature (
°
C)
400 LFM
200 LFM
300 LFM
100 LFM
30
0
10
15
25
35
20
30
5
35 40 45 50 55 60 65 70 75 80
UCQ-2.5/40-D24 Maximum Current Temperature Derating
No baseplate, V
IN = 24V (at sea level)
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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 12 of 24