Output Current (Amps)
Ambient Temperature (
°
C)
400 lfm200 lfm
30 40 50 60 70 80
14
16
12
10
20
18
300 lfm
100 lfm
UCH-5/20-D24 Maximum Current Temperature Derating (at sea level)
No baseplate, V
IN = 24V, transverse airflow
V
IN
= 24V
V
IN
= 18V
Efficiency (%)
Load Current (Amps)
V
IN
= 36V
75
70
85
80
90
63 9 12 15 18
95
Power Dissipation
(V
IN
= 24V)
UCH-5/20-D24 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
Power Dissipation (Watts)
20
0
2
6
10
4
8
12
16
14
18
Output Current (Amps)
Ambient Temperature (
°
C)
400 lfm200 lfm
30 40 50 60 70 80
18
22
14
10
30
26
300 lfm
100 lfm
UCH-5/30-D48 Maximum Current Temperature Derating (at sea level)
No baseplate, VIN = 48V, transverse airflow
Efficiency (%)
Load Current (Amps)
75
70
85
80
90
63 9 12 1815 24 2721 30
95
V
IN
= 48V
V
IN
= 75V
V
IN
= 36V
Power Dissipation
(V
IN
= 48V)
UCH-5/30-D48 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
Power Dissipation (Watts)
0
4
8
12
16
20
30 40 50 60 70 80 85
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
UCH-12/4.2-D48 Maximum Current Temperature Derating at sea level
(VIN = 48V, airflow direction from VIN to VOUT, no baseplate)
Output Current (Amps)
Ambient Temperature (
°
C)
Natural Convection
0.42 0.84 1.26 1.68 2.1 2.52 2.94 3.36 3.78 4.2
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
UCH-12/4.2-D48 Efficiency and Power Dissipation
vs Line Voltage and Load Current @25˚C
Power Dissipation (Watts)
Efficiency (%)
Load Current (Amps)
V
IN
= 75V
V
IN
= 36V V
IN
= 48V
Power Dissipation
(V
IN
= 48V)
TYPICAL PERFORMANCE DATA
www.murata-ps.com/support
Single Output UCH Models
Isolated, “Half-Brick”
1.8−15V Output DC/DC Converters
MDC_UCH Models.C01 Page 11 of 18
