Switching Power Supply
S8E3
Compact and Economical Power
Supply with 3-Point Switching
Capacity
30-or 50-watt models
Open-frame and covered types available
UL and CSA approval
3-year warranty
D
D
D
D
Ordering Information
J SWITCHING POWER SUPPLIES
Description
Part number
Input voltage
Configuration
Open-frame
p
type
yp
120 VAC
Power ratings
30 W
50 W
Covered-type
30 W
50 W
Output voltage/Current
Front terminals
Top terminals
V1
V2
V3
5 V/3 A
12 V/1.2 A
–12 V/0.3 A
S8E3-03031A
S8E3-03031B
5 V/3 A
15 V/1 A
–15 V/0.3 A
S8E3-03032A
S8E3-03032B
5 V/5 A
12 V/1.5 A
–12 V/0.5 A
S8E3-05031A
S8E3-05031B
5 V/5 A
15 V/1.2 A
–15 V/0.5 A
S8E3-05032A
S8E3-05032B
5 V/3 A
12 V/1.2 A
–12 V/0.3 A
S8E3-03031D
S8E3-03031E
5 V/3 A
15 V/1 A
–15 V/0.3 A
S8E3-03032D
S8E3-03032E
5 V/5 A
12 V/1.5 A
–12 V/0.5 A
S8E3-05031D
S8E3-05031E
5 V/5 A
15 V/1.2 A
–15 V/0.5 A
S8E3-05032D
S8E3-05032E
J MODEL NUMBER LEGEND
S8E31
1
2
3
1. Power Ratings
030: 30 W
050: 50 W
Switching Power Supply
S8E3
2. Output Voltage
31: 5 V, 12 V, –12 V
32: 5 V, 15V, –15 V
3. Configuration
A: Open-frame type, front terminals
B: Open-frame type, top terminals
D: Covered-type, front terminals
E: Covered-type, top terminals
Specifications
Item
30 W
Efficiency (typical)
73%
50 W
Input
Voltage
120 VAC (85 to 132 VAC)
Frequency
47 to 450 Hz
Current (See Note 2.)
1.2 A max.
Leakage current (See Note 2.)
0.3 mA max. (at 100 VAC)
Inrush current (See Note 2.)
25 A max. (25°C, cold start, at 100 VAC)
Noise filter
Yes
1.6 A max.
Output (See Note 1.)
Voltage adjustment range
0% to 5% (V1 only)
Ripple (See Note 2.)
2% (p-p) max.
Input variation influence
0.4% max.
Load variation influence
V1: 0.8% max.; V2, V3: 2.5% max.
Temperature variation influence
0.05%/°C max. (with rated input and output)
Rise time
100 ms max.
Hold time (See Note 2.)
20 ms min. (at 100 VAC)
Additional function
Overload protection
V1: inverted drop type, automatic reset; V2, V3: short-circuit protection
Overvoltage protection
Yes (V1 only)
Characteristics
Ambient temperature
Operating
See the derating curve in the Engineering Data section.
Ambient temperature
Storage
–25°C to 65°C (–13°F to 145°F) with no condensation and icing
Dielectric strength
2,000 VAC, 50/60 Hz for 1 min (between all inputs and all outputs/GR terminals)
Insulation resistance
100 MΩ min. (between all outputs and all inputs/GR terminals at 500 VDC)
Vibration resistance
10 to 55 Hz, 0.75-mm double amplitude (44.1 m/s2 (4.5G)) for 2 hrs each in X, Y, and
Z directions
Shock resistance
294 m/s2 (30G), 3 times each in ±X, ±Y, and ±Z directions
Electromagnetic interference
Conforms to FCC class B, VCCI 2nd category, EN55011 Gr1 class B: EN50081-2
Approved standards
UL1950, CSA C22.2 No. 234
Output indicator
Yes (green)
Life expectancy
8 yrs min. (used at 40°C at the rated input with a 50% load)
Weight (covered-type)
450 g max.
570 g max.
Note: 1. The specification is defined at the power supply output terminals.
2. At 100% load for rated input voltage (100 VAC).
Switching Power Supply
S8E3
2
Engineering Data
J MINIMUM CURRENTS FOR V1, V2, AND V3
V1
Load
V2
Load
V1, V2, and V3 can be used at 0% loads.
Input
0% to 100%
Load
0% to 100%
V3
J DERATING CURVE (STANDARD INSTALLATION)
Note: 1. The derating curve depends on the mounting position of the Power Supply.
2. The above ambient temperature curves for forced air-cooling were obtained with an air capacity of 1 m3 per minute.
Open-frame Type
Covered-type
Natural air cooling
Forced-air cooling
Natural air cooling
Load (%)
Load (%)
Forced-air
cooling
Ambient temperature (°C)
3
Switching Power Supply
Mounting Position For
Standard Installation
Ambient temperature (°C)
S8E3
Vertical –
Front Terminal
Model
Horizontal –
Top Terminal
Model
J OVERLOAD PROTECTION
Rated voltage
Output voltage (V)
The S8E3 is provided with an overload protection function
that protects the load and the S8E3 from possible damage
by overcurrent. The following graph shows the overload
detection and reset operation of the S8E3.
Rated voltage
Output current (%)
Type
Operating method
Detection
Reset
V1
Inverted drop
105% min. of rated
load current
Automatically resets
when the output current
returns to normal
V2, V3
Short-circuit protection
---
Automatically resets
when the output current
returns to normal
Note: 1. The overload protection function of output V1 is triggered when the total output of V1, V2, and V3 exceeds the permissible output capacity of the S8E3 (total overcurrent protection). If outputs V2 and V3 are within their rated currents, overload protection
for V1 operates with its output current is 105% or more of the rated output current. Caution is required, however, because operation depends on the output status of outputs V2 and V3.
2. V2 and V3 have an independent short-circuit protection function.
3. Do not continue operating the S8E3 if an output terminal is short-circuited or overloaded, or the S8E3 may incur output voltage
fluctuation, internal element deterioration, or damage.
J OVERVOLTAGE PROTECTION
(V1 OUTPUT ONLY)
Output voltage (V)
The Power Supply is provided with an overvoltage protection
function that protects the load and the Power Supply from
possible damage by overvoltage. When the output voltage
rises above a set value (120% of the rated output voltage),
the protection function is triggered, shutting off all of the
output voltage. If this occurs, reset the Power Supply by
turning it off for 1 minute min. and then turning it on again.
Overvoltage
protection
operating
Approx.
20%
5%
Rated output
voltage
Variable range
J INRUSH CURRENT, START UP TIME, HOLD TIME
Input ON
Input OFF
AC input
voltage
Inrush current on input application
AC input
current
96.5%
90%
Output
voltage
Start up time
(100 ms max.)
Hold time
(20 ms min.)
Switching Power Supply
S8E3
4
Operation
J BLOCK DIAGRAM
30-W, 50-W Models
Fuse (3.15 A)
AC (L)
INPUT
OUTPUT
V2
Noise filter
AC (N)
Inrush current
Rectifier
protection circuit
Rectifier
Regulator
G2
V3
Rectifier
Regulator
V1
Drive overload
protection circuit
GR
Rectifier
G1
Detector
Photocoupler
Overvoltage
detection circuit
Photocoupler
J PEAK LOAD CURRENT
(S8E3-05031jONLY)
J SERIES OR PARALLEL OPERATION
Model S8E3 cannot be used in series or parallel operation.
Load current (%)
The rated current of the S8E3-05031j is 1.5 A at 12 V. The
peak load current of the S8E3-05031j is available at 12 V
under the following conditions, in which case the waveform
of the load current must satisfy the following formula.
Time (s)
Iav y Im =
Ip:
Iav:
Im:
τ:
T:
a:
(Ip – a)τ
T
+ a (see note)
Peak current (2 A max.)
Rated output current (1.5 A)
Mean load current
Pulse width of peak current (30 s max.)
Frequency
Continuous load current
(A)
(A)
(A)
(S)
(S)
(A)
Note: When the output current rises above the peak current,
the overload protection function is triggered and the
output voltage will decrease.
5
Switching Power Supply
S82K
Dimensions
Unit: mm (inch)
J SWITCHING POWER SUPPLIES
30-W Models
Front Terminal Models
Two, M3 mounting holes
(each)
14 max.
10 max.
Eight, M3 terminal screw
172 (6.77)
69
(2.71)
35
29
25
138 (5.43)
19
22
Two, 3.5 dia.
15
25
83 (3.27)
Two, M3 mounting holes
Top Terminal Models
69
(2.71)
29
33
35
100
25
19
22
138 (5.43)
Two, 3.5 dia.
15
25
50-W Models
Two, M3 mounting holes
(each)
5 max.
172 (6.77)
Eight, M3 terminal screw
83 (3.27)
Two, M3 mounting holes
Two, M3 mounting
holes (each)
14 max.
Front Terminal Models
10 max.
Eight, M3 terminal screw
193.5 (7.62)
69
(2.71)
35
25
75
159 (6.26)
19
22
Two, 3.5 dia.
15
25
Two, M3 mounting holes
75 (2.95)
Top Terminal Models
Two, M3 mounting
holes (each)
5 max.
193.5 (7.60)
Eight, M3 terminal screw
69
(2.71)
35
29
33
22
25
19
75
25
75 (2.95)
159 (6.26)
Two,
3.5 dia.
15
Switching Power Supply
Two, M3 mounting holes
S8E3
6
J MOUNTING HOLES
Side Mounting
Back Mounting
Two, 3.5 dia. holes, 4mm depth
Two, 3.5 dia. holes
Output
30 W
50 W
L1
100 mm (3.94 in)
75 mm (2.95 in)
L2
83 mm (3.27 in)
75 mm (2.95 in)
L3
138 mm (5.43 in)
159 mm (6.26 in)
L2
L1
Bottom Mounting
Two, M3 dia. holes
L3
Nomenclature
Front Terminal Models (30-/50-W)
6
7
1
V1
G1
AC(L)
4
AC(N)
2
V2
G2
3
5 GR
V3
Top Terminal Models (30-/50-W)
6
7
1
V1
G1
AC(L)
2
4
V2
AC(N)
G2
3
5 GR
V3
1. V1: DC Output Terminals
2. V2: DC Output Terminals
3. V3: DC Output Terminals
Note: Connect the load lines to V1, V2, and V3.
4.
5.
6.
7.
7
AC Input Terminals: Connect input lines to these terminals.
Ground Terminals: Connect ground line to this terminal.
Output Indicator: Lights while direct current (DC) output is ON.
V.ADJ Adjuster: It is possible to increase or decrease the output voltage by 5%.
Switching Power Supply
S82K
Precautions
J MOUNTING
Mounting Screws
•
When tightening the mounting screws into the power supply, do
not allow them to penetrate more than 4 mm into the power
supply.
•
To improve and maintain the reliability of the Power Supply
over a long period of time, mount the Power Supply so that air
flow takes place around the Power Supply. The Power Supply
is designed to dissipate heat through natural air-flow.
Forced-air cooling is recommended.
Two (or More) Power Supplies Mounted Side-by-Side
When mounting two or more Power Supplies side-by-side, allow
at least 20 mm spacing between them, as shown in the following
illustration.
Penetration of Metal Filings and Cuttings
If drilling and other work is carried out over the power supply,
metal filings, cuttings, and other materials may fall onto the
printed circuit boards inside the power supply, leading to internal
shorts and damage. If it is necessary to work over top of the
power supply, cover the power supply with a sheet or other
suitable material to prevent the entry of foreign matter into the
power supply. This step is necessary even if the power supply is
equipped with a cover. After completing the above work and
before supplying power, remove the sheet to avoid interference
with appropriate cooling.
20 mm min.
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Cat No. GC PS6
2/03
Specifications subject to change without notice
Switching Power Supply
Printed in USA
S8E3
8