
Data Sheet AE/LZT 137 57 R1  Ericsson Components AB, August 1999
Characteristics
min
max
Unit
T
C
Maximum Operating Case Temperature
-40
+100
°C
T
S
Storage temperature
-40
+125
°C
V
I
Continuous input voltage 
-0.5
+75
Vdc
V
ISO
 Isolation voltage 
(input to output test voltage)
1,500
Vdc
V
RC
Remote control voltage
15
Vdc
I
2
t
Inrush transient
1
A
2
s
Characteristics
Conditions
min
typ max
Unit
V
I
Input voltage 
range
1)
36
72
Vdc
V
Ioff
Turn-off input 
voltage
Ramping from 
higher voltage
31
33
Vdc
V
Ion
Turn-on input 
voltage
Ramping from 
lower voltage
34
36
Vdc
C
I
Input capacitance
2.8
μF
I
Iac
Reflected 
ripple current
5 Hz to 20 MHz-150W
20
mA p-p
50 W
75 W
100 W
150 W
1.6
2.4
3.2
5.3
I
Imax
Maximum input
current
V
I
= V
Imin
A
P
Ii
Input idling power
I
O
= 0
2.5
7.5
W
P
RC
Input 
stand-by power
(turned off with RC)
V
I
= 50V
RC open
.05
2.5
W
TRIM
Maximum input 
voltage on trim pin
6
Vdc
Characteristics
Test procedure & conditions
Random 
Vibration
IEC 68-2-34E
d
Frequency
Spectral density
Duration
10...500 Hz
0.025 g2/Hz
10 min in each 
direction
Sinusoidal 
Vibration
IEC 68-2-6 F
c 
Frequency
Amplitude
Acceleration
# of cycles
10-500 Hz
0.75mm
10g
10 in each axis
Shock 
(half sinus)
IEC 68-2-27 E
a
Peak acceleration
Duration
50 g
3ms
Temperature 
change
IEC 68-2-14 N
a
Temperature
Number of cycles
-40°C...+100°C
300
Accelerated 
damp heat
IEC 68-2-3 C
a 
with bias
Temperature
Humidity
Duration
85°C
85% RH
500 hours
Solder 
resistibility
IEC 68-2-20 T
b 
method IA
Temperature, solder
Duration
260° C
10...13 s
General
Absolute Maximum Ratings
Input 
T
C 
< T
Cmax
Environmental Characteristics
2
Stress in excess of Absolute Maximum Ratings may 
cause permanent damage. Absolute Maximum Ratings,
sometimes referred to as no destruction limits, are 
normally tested with one parameter at a time exceeding
the limits of Output data or Electrical Characteristics. 
If exposed to stress above these limits, function and 
performance may degrade in an unspecified manner.
For design margin and to enhance system reliability, 
it is recommended that the PKJ series DC/DC power
modules are operated at case temperatures below 90°C.
1) See also Input Voltage in the Operating 
Information section
Safety
The PKJ Series DC/DC power modules are
designed to comply with EN 60 950 Safety of
information technology equipment including 
electrical business equipment. 
The PKJ DC/DC power modules are also 
recognized by UL and meet the applicable 
requirements in UL 1950, Safety of information
technology equipment and applicable Canadian
safety requirements.
The isolation is an operational insulation in 
accordance with EN 60 950. The DC/DC power
module should be installed in end-use equipment,
in compliance with the requirements of the 
ultimate application, and is intended to be 
supplied by an isolated secondary circuit.
Consideration should be given to measuring 
the case temperature to comply with T
C
max
when in operation.
When the supply to the DC/DC power
module meets all the requirements for SELV
(<60Vdc), the output is considered to remain
within SELV limits (level 3). If connected to a 60V
DC power system, reinforced insulation must be
provided in the power supply that isolates the
input from the mains. Single fault testing in the
power supply must be performed in combination
with the DC/DC power module to demonstrate
that the output meets the requirement for SELV.
One pole of the input and one pole of the output 
is to be grounded or both are to be kept floating.