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S8AS2

Smart Power Supply (240/480 W)

S8AS2

Inheriting tripping performance with the renewal, while renewing Efficiency, size, and design.

Item list of S8AS2

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last update: October 6, 2025

Specifications

S8AS2-24024-06[]

Model S8AS2-24024-06S S8AS2-24024-06SN
Efficiency 100 VAC input *1 93% typ. (Power supply section only: 94% typ.)
230 VAC input *1 95% typ. (Power supply section only: 96% typ.)
Input
conditions		 Input voltage allowable range *3 85 to 264 VAC
Frequency *3 50/60 Hz (47 to 63 Hz)
Input current 2.6 A typ. (100 VAC input)
1.3 A typ. (200 VAC input)
Power factor 0.9 or greater
Leakage current 0.5 mA max. (100 VAC input)
1 mA max. (200 VAC input)
Inrush current
(for a cold start at 25°C)		 14 A typ. (100 VAC input)
28 A typ. (200 VAC input)
Output
characteristics		 Number of branches 6
Maximum cutoff
output current (per branch)		 3.8 A
Total output current 10 A
Voltage variable range *4 24 to 28 V (adjustable with V.ADJ)
Ripple noise voltage
(at rated input and outputs) *1		 80 mV max.
at 20 MHz of bandwidth
Output leakage current 10 mA max.
Input fluctuation 0.5% or less (at input 85 to 264 VAC, 100% Load) *2
Load fluctuation 4.0% or less (at rated input, 0 to 100% Load) *2
Ambient temperature fluctuation 0.05%/°C max.
Startup time *5 600 ms typ. *1
Outputs hold time *5 30 ms typ. (at rated input and outputs) *1
Functions Tripping
functions		 Abnormal voltage
tripping		 26.0 to 32.0 V 32.0 V (fixed)
Abnormal current
tripping *5		 Setting range:
0.5 to 3.8 A (in 0.1 A Unit)		 3.8 A (fixed)
Abnormal current
tripping type		 Standard (default) Extended time (Cannot be changed.)
Abnormal total
current tripping		 If a total output current equivalent to 17 A for 2 s min., 15 A for 5 s min., 13 A for 10 s min., or 12 A for 20 s min. flows, it will be interrupted.
Tripping Alarm
Output		 MOSFET relay output
30 VDC or less, 50 mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Undervoltage
detection
functions		 Undervoltage alarm Setting range:
18.0 to 26.4 V (in 0.1 V Unit)		 20.0 V (fixed)
Undervoltage
Detection Output		 MOSFET relay output
30 VDC or less, 50mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Maintenance
Forecast
Monitor
Function		 Years up to
replacement time		 Setting range:
0.0 to 5.0 yr (in 0.1 yr Unit)		 0.5 yr (Cannot be changed.)
Percentage up to
replacement time		 Setting range:
0.0 to 99.9% (in 0.1% Unit)		 0% (Cannot be changed.)
Total running time Setting range:
0 to 132 kH (in 1 kH Unit)		 132 kHz (fixed)
Maintenance
Forecast
Monitor Output		 MOS FET relay output
30 VDC or less, 50 mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Over-
temperature
detection
function		 Over-temperature Setting range:
25 to 100°C (1°C unit)		 100°C (fixed)
Over-temperature
output		 MOSFET relay output
30 VDC or less, 50 mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Display
functions		 Output voltage
display		 Display range: 16.3 to 32.0 V
Display accuracy: 2% rdg ±1 digit max.
Output current display Branch output current Display range: 0.0 to 20.0 A
Branch output peak current display range: 0.0 to 20.0 A
Total output current display range: 0.0 to 60.0 A
Display accuracy: 5% FS (4 A) ±1 digit max.
Maintenance
forecast monitor
display (yr)		 Display range: FUL (Full) /HLF (Half) /Replacement period from 0.0 to 4.9 years
Maintenance
forecast monitor
display
(percentage)		 Display range: 0.0 to 99.9%
Total running time Display range: 0 to 132 kHz
Temperature
display		 Display range: -20 to 120°C
Display accuracy: 2°C ±1 digit max.
Additional
features		 External Tripping Input The input can be enabled or disabled for each branch output.
19.2 to 30.0 VDC, minimum signal width:
10 ms, tripping after input within 20 ms + the shutdown sequence set time		 All branch outputs: Enabled (Cannot be changed.)
19.2 to 30.0 VDC, minimum signal width 10 ms or more, 20 ms after input
Startup sequence Setting range:
0.0 to 99.9 seconds (0.1-second Unit)		 Branch output 1: 0.0 s (fixed)
Branch output 2: 0.4 s (fixed)
Branch output 3: 0.8 s (fixed)
Branch output 4: 1.2 s (fixed)
Branch output 5: 1.6 s (fixed)
Branch output 6: 2.0 s (fixed)
Shutdown sequence Setting range:
0.0 to 99.9 seconds (0.1-second Unit)		 All branch outputs:
0.0 s (Cannot be changed.)
Series connection Not supported.
Parallel connection Not supported.
Output indicator Provided (Color: green)
Indication
monitor		 Measurement/
displayed
details		 For details, refer to S8AS2 Users Manual (Man. No. T242).
Main display area Seven-segment display (Color: white)
Channel display
area		 Seven-segment display (Color: green)
Unit display area Provided (Color: yellow)
Withstand
voltage		 Dielectric strength voltage 3 kVAC for 1 min between all input terminals collectively and all branch output terminals, all I/O signal terminals collectively (Detection current: 20 mA)
2 kVAC for 1 min between all input terminals collectively and protective earth (Detection current: 20 mA)
1 kVAC for 1 min between protective earth and all branch output terminals, all I/O signal terminals collectively (Detection current: 30 mA)
500 VAC for 1 min between all branch output terminals and all I/O signal terminals collectively (Detection current: 20 mA)
500 VAC for 1 min between all output signals and all input signals collectively (Detection current: 20 mA)
Insulation resistance 100 MΩ min. at 500 VDC between the protective earth terminal or all input terminals collectively and all branch output terminals, and all I/O signal terminals collectively
Environment Ambient operating temperature -25 to 70°C (with no condensation or icing) *5
Storage temperature -40 to 85°C
Ambient operating humidity 95% max.
Storage humidity 95% max.
Vibration resistance 10 to 55 Hz, 0.375 mm single amplitude, 3 directions, 2 h each
Shock resistance 150 m/s2 3 times each in ±X, ±Y, ±Z directions.
Reliability MTBF 36,000 hours min.
Expected life 10 years
Construction Weight (main unit) 1,050 g max.
Cooling fan blank
Protective structure IP20 (Conforms to EN/IEC60529)
Compatible
standards		 Harmonic suppression Conforms to EN61000-3-2
EMI Conducted EMI Compliant with EN 61204-3 Class B, EN 55011 Class B
Radiated EMI Compliant with EN 61204-3 Class B, EN 55011 Class B *6
EMS EN 61204-3 high severity levels
Safety standards *7 UL 508 (Listing, Class 2 Output: Per UL 1310)
CSA C22.2 No.107.1 (cUL, Class 2 Output: per CSA C22.2 No.223)
EN/IEC 62477-1 (SELV/ES1 Output), OVCIII (I≤2,000 m),
OVCII (2,000 m< and ≤3,000 m), Pol2
Conforms to PELV (EN/IEC60204-1)
Conforms to EN/IEC61558-2-16
RCM (EN61000-6-4)
SEMI standards Compliance with SEMI F47-0706 (for 200 to 240 VAC input)

*1. Rated input/output conditions: at rated input voltage, rated frequency, rated output voltage, and rated total output current.
*2. 100% Load condition: at rated output voltage and rated total output current.
*3. Do not use an inverter output for the Power Supply. Inverters with an output frequency of 50/60 Hz are available, but the rise in the internal temperature of the Power Supply may result in ignition or burning.
Do not connect a UPS with a square wave outputs to the input. There is a risk of smoke generation and burning due to the internal temperature rise of the product.
*4. Voltage will increase above 28 V when adjusting the V.ADJ volume. When adjusting the Output voltage, please check the power supply output voltage to avoid damaging the Load. Also, when the Output voltage exceeds the Set value, all branch output will be shut off.
*5. For details, please refer to Inrush Current, Starting Time, Outputs Hold Time on Catalog.
*6. EM (I Radiated EMI) complies with Class B status this product is installed inside a Control panel.
*7. Please refer to About Compatible standards.

S8AS2-48024-08[]

Model S8AS2-48024-08S S8AS2-48024-08SN
Efficiency 100 VAC input *1 93% typ. (Power supply section only: 94% typ.)
230 VAC input *1 95% typ. (Power supply section only: 96% typ.)
Input
conditions		 Input voltage allowable range *3 85 to 264 VAC
Frequency *3 50/60 Hz (47 to 63 Hz)
Input current 5.2 A typ. (100 VAC input)
2.6 A typ. (200 VAC input)
Power factor 0.9 min.
Leakage current 0.5 mA max. (100 VAC input)
1 mA max. (200 VAC input)
Inrush current
(for a cold start at 25°C)		 14 A typ. (100 VAC input)
28 A typ. (200 VAC input)
Output
characteristics		 Number of branches 8
Maximum interrupting
Output current (per branch)		 3.8 A
Total output current 20 A
Voltage variable range *4 24 to 28 V (by V.ADJ)
Ripple noise voltage
(at rated Inputs and Outputs) *1		 190 mV or less
at 20 MHz of bandwidth
Output leakage current 10 mA max.
Static input fluctuation 0.5% or less (at input 85 to 264 VAC, 100% Load) *2
Load fluctuation 4.0% or less (at rated input, 0 to 100% Load) *2
Ambient temperature fluctuation 0.05%/°C max.
Startup time *5 600 ms typ. *1
Outputs hold time *5 30 ms typ. (at rated Inputs and Outputs) *1
Functions Tripping
functions		 Abnormal voltage
tripping		 26.0 to 32.0 V 32.0 V (fixed)
Abnormal current
tripping *5		 Setting range:
0.5 to 3.8 A (in 0.1 A Unit)		 3.8 A (fixed)
Abnormal current
tripping type		 Standard (default) Extended time (Cannot be changed.)
Abnormal total
current tripping		 The total output current equivalent to 27 A for 1 s min., 25 A for 2 s min., and 22.5 A for 5 s min. will cause disconnection.
Tripping Alarm
Output		 MOSFET relay output
30 VDC or less, 50 mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Undervoltage
detection
functions		 Undervoltage alarm Setting range:
18.0 to 26.4 V (in 0.1 V Unit)		 20.0 V (fixed)
Undervoltage
Detection Output		 MOSFET relay output
30 VDC or less, 50 mA or less, leakage current 0.1 mA or less, residual voltage 2 V or less
Maintenance
Forecast
Monitor
Function		 Years up to
replacement time		 Setting range:
0.0 to 5.0 yr (in 0.1 yr Unit)		 0.5 yr (Cannot be changed.)
Percentage up to
replacement time		 Setting range:
0.0 to 99.9% (in 0.1% Unit)		 0% (Cannot be changed.)
Total running time Setting range:
0 to 132 kHz (in 1 kHz Unit)		 132 kH (fixed)
Maintenance
Forecast
Monitor Output		 MOSFET relay output
Outputs of 30 VDC or less, 50 mA or less, leakage current of 0.1 mA or less, and residual voltage of 2 V or less
Over-
temperature
detection
function		 Over-temperature Setting range:
25 to 100°C (in 1°C units)		 100°C (fixed)
Over-temperature
output		 MOSFET relay output
Outputs of 30 VDC or less, 50 mA or less, leakage current of 0.1 mA or less, and residual voltage of 2 V or less
Display
functions		 Output voltage
display		 Display range: 16.3 to 32.0 V
Display accuracy: 2% rdg ±1 digit max.
Output current
display		 Branch output current display range: 0.0 to 20.0 A
Branch output peak current display range: 0.0 to 20.0 A
Total output current display range: 0.0 to 60.0 A
Display accuracy: 5% FS (4 A) ±1 digit max.
Maintenance
forecast monitor
display (yr)		 Display range: FUL (Full) /HLF (Half) /0.0 to 4.9 years
Maintenance
forecast monitor
display
(percentage)		 Display range: 0.0 to 99.9%
Total running time Display range: 0 to 132 kH
Temperature
display		 Display range: -20 to 120°C
Display accuracy: 2°C ±1 digit max.
Additional
features		 External Tripping Input The input can be enabled or disabled for each branch output.
19.2 to 30.0 VDC, minimum signal width:
10 ms, tripping after input within 20 ms + the shutdown sequence set time		 All branch outputs: Enabled (Cannot be changed.)
19.2 to 30.0 VDC,
Minimum signal width:
10 ms, 20 ms after input
Startup sequence Setting range:
0.0 to 99.9 seconds
(in 0.1 second Unit)		 Branch output 1: 0.0 s (fixed)
Branch output 2: 0.4 s (fixed)
Branch output 3: 0.8 s (fixed)
Branch output 4: 1.2 s (fixed)
Branch output 5: 1.6 s (fixed)
Branch output 6: 2.0 s (fixed)
Branch output 7: 2.4 s (fixed)
Branch output 8: 2.8 s (fixed)
Shutdown sequence Setting range:
0.0 to 99.9s (in 0.1s Unit)		 All branch outputs:
0.0 s (Cannot be changed.)
Series connection Not supported.
Parallel connection Not supported.
Output indicator Provided (Color: green)
Indication
monitor		 Measurement/
displayed
details		 For details, refer to S8AS2 Users Manual (Man. No. T242).
Main display area Seven-segment display (Color: white)
Channel display
area		 Seven-segment display (Color: green)
Unit display area Provided (Color: yellow)
Withstand
voltage		 Dielectric strength voltage 3 kVAC for 1 min between all input terminals collectively and all branch output terminals, all I/O signal terminals collectively (Detection current: 20 mA)
2 kVAC for 1 min between all input terminals collectively and protective earth (Detection current: 20 mA)
1 kVAC for 1 min between protective earth and all branch output terminals, all I/O signal terminals collectively (Detection current: 30 mA)
500 VAC for 1 min between all branch output terminals and all I/O signal terminals collectively (Detection current: 20 mA)
500 VAC for 1 min between all input signal collectively and all output signal collectively (Detection current: 20 mA)
Insulation resistance 100 MΩ min. at 500 VDC between the protective earth terminal or all input terminals collectively and all branch output terminals, and all I/O signal terminals collectively
Environment Ambient operating temperature -25 to 70°C (with no condensation or icing) *5
Storage temperature -40 to 85°C
Ambient operating humidity 95% max.
Storage humidity 95% max.
Vibration resistance 10 to 55 Hz, 0.375 mm single amplitude, 3 directions, 2 h each
Shock resistance 150 m/s2 3 times each in ±X, ±Y, ±Z directions.
Reliability MTBF 36,000 hours min.
Expected life 10 years
Construction Weight (main unit) Less than 1,400 g
Cooling fan blank
Protective structure IP20 (Conforms to EN/IEC60529)
Compatible
standards		 Harmonic suppression Conforms to EN61000-3-2
EMI Conducted EMI Compliant with EN 61204-3 Class B, EN 55011 Class B
Radiated EMI Compliant with EN 61204-3 Class B, EN 55011 Class B *6
EMS EN 61204-3 high severity levels
Safety standards *7 UL 508 (Listing, Class 2 Output: Per UL 1310)
CSA C22.2 No.107.1 (cUL, Class 2 Output: per CSA C22.2 No.223)
EN/IEC 62477-1 (SELV/ES1 Output), OVCIII (I≤2,000 m),
OVCII (2,000 m< and ≤3,000 m), Pol2
Conforms to PELV (EN/IEC60204-1)
Conforms to EN/IEC61558-2-16
RCM (EN61000-6-4)
SEMI standards Compliance with SEMI F47-0706 (for 200 to 240 VAC input)

*1. Rated input/output conditions: at rated input voltage, rated frequency, rated output voltage, and rated total output current.
*2. 100% Load condition: at rated output voltage and rated total output current.
*3. Do not use an inverter output for the Power Supply. Inverters with an output frequency of 50/60 Hz are available, but the rise in the internal temperature of the Power Supply may result in ignition or burning.
Do not connect a UPS with a square wave outputs to the input. There is a risk of smoke generation and burning due to the internal temperature rise of the product.
*4. Voltage will increase above 28 V when adjusting the V.ADJ volume. When adjusting the Output voltage, please check the power supply output voltage to avoid damaging the Load. Also, when the Output voltage exceeds the Set value, all branch output will be shut off.
*5. For details, please refer to Inrush Current, Starting Time, Outputs Hold Time on Catalog.
*6. EM (I Radiated EMI) complies with Class B status this product is installed inside a Control panel.
*7. Please refer to About Compatible standards below.

About Compatible standards

• Regarding EN/IEC 61558-2-16
When acquiring EN/IEC 60204-1 (Machinery Safety), control circuits require a control transformer; however, products that have obtained safety standards with OVCIII or products adopting transformers compliant with EN/IEC 61558-2-16 may not require a control transformer.

last update: October 6, 2025

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