Juniper SRX5400 Hardware Manual page 156

Table 36: Calculating System Input Power (continued)
Power Supply
SRX5400 DC
1
These values are at full load and nominal voltage.
4. Calculate thermal output (BTUs) for the system. To calculate this value, multiply the total input power
requirement (in watts) by 3.41 as shown in
Table 37: Calculating System Thermal Output
Power Supply
SRX5400 AC
SRX5400 DC
Power Supply Efficiency
~98 %
Table 37 on page
Thermal Output (BTUs per hour)
2354 * 3.41 = 8027 BTU/hr
2138 * 3.41 = 7291 BTU/hr
1
Input Power Requirement
2095/0.98 = 2138 W
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