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Q-120C 120W AC-DC Quad Output Enclosed Switching Power Supply
Rp590,000.00
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DAPPRA Q-120C (SKU: SU55) is a 122.5W quad-output enclosed switching power supply delivering +5V, +15V, -5V, and -15V. Selectable 88–132 VAC / 176–264 VAC input, 76% typical efficiency, enclosed metal chassis, fanless cooling — ideal for industrial equipment requiring multiple DC voltage rails from a single unit.
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Overview
Q-120C (SU55) Overview
The DAPPRA Q-120C (internal code SU55) is a 122.5W quad-output enclosed switching power supply delivering +5V/12A, +15V/5A, -5V/1A and -15V/1A from a single chassis. It is the Q Series variant that provides symmetric ±15V rails alongside a high-current +5V rail, making it particularly suited to analog instrumentation, op-amp circuits, signal conditioning and test equipment that require bipolar supply rails.
The Q-120C uses selectable AC input: 88–132VAC or 176–264VAC via an external selector switch, or 240–370VDC. Efficiency is 76% typical. Free air convection cooling is used without a fan, and the enclosed metal chassis measures 199 × 110 × 50 mm.
The four outputs share a common ground (COM), with the -5V and -15V rails referenced to COM. Protection includes short circuit, overload and over voltage protection. The Q-120C is suited to laboratory equipment, process control instrumentation and mixed-signal systems where a +5V digital rail and ±15V analog rails must be generated from one power supply.
Key Features
Q-120C Key Features
A 122.5W quad-output power supply with symmetric ±15V rails for analog and instrumentation loads.
- Quad Output · +5V / +15V / -5V / -15VFour simultaneous DC rails, including symmetric ±15V for op-amps and analog circuits.
- 122.5W Total Output PowerCH1 +5V/12A, CH2 +15V/5A, CH3 -5V/1A, CH4 -15V/1A.
- Selectable AC Input88–132VAC / 176–264VAC by switch, or 240–370VDC.
- 76% Typical EfficiencyBalanced efficiency for a quad-output chassis with bipolar rails.
- Free Air Convection CoolingNo fan — quieter operation and less dust ingress.
- Enclosed Metal Chassis with Vents199 × 110 × 50 mm chassis with perforated ventilation.
- Complete Protection FunctionsShort circuit, overload and over voltage protection.
- -10°C to +60°C Operating RangeWith derating above +45°C or +50°C.
- 2-Year WarrantyStandard Q Series warranty.
Specifications
Q-120C (SU55) Specifications
Output Channels
| Model | Q-120C (SU55) |
| CH1 | +5V / 12A |
| CH2 | +15V / 5A |
| CH3 | -5V / 1A |
| CH4 | -15V / 1A |
| Rated Power | 122.5W |
| Voltage Tolerance (CH1–CH4) | ±2% / 10/-5% / ±6% / 10/-5% (typical) |
| Ripple & Noise (max.) | 80mV / 150mV / 80mV / 150mV (typical) |
Protection
| Short Circuit | Protected, auto-recovery |
| Overload | 105–150% rated output, hiccup mode, auto-recovery |
| Over Voltage | Protected, auto-recovery |
Input
| Voltage | 88–132VAC / 176–264VAC (selectable by switch) · 240–370VDC |
| Frequency | 47–63Hz |
| AC Current (typ.) | 2.8A @ 115VAC · 1.6A @ 230VAC |
| Efficiency (typ.) | 76% |
Isolation & Construction
| Isolation | I/P–O/P: 3000VAC |
| Cooling | Free air convection (fanless) |
| Chassis | Enclosed metal case with ventilation vents |
Environment
| Working Temperature | -10 ~ +60°C (derating above +45°C or +50°C) |
| Storage Temperature | -20 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Pollution Degree | 2 |
Safety & EMC
| Safety Standards | UL / CE (confirm marking on unit) |
| Withstand Voltage | I/P–O/P: 3000VAC |
| EMC Emission | Complies with applicable EN standards (confirm on unit) |
Mechanical
| Dimensions (L×W×H) | 199 × 110 × 50 mm |
| Weight | Approx. 0.86 kg |
| Mounting | Chassis base mounting holes |
| Warranty | 2 Years |
Terminal Assignment
| Terminal | Function |
|---|---|
| FG | Frame Ground (connect to PE) |
| AC/N | AC Neutral |
| AC/L | AC Line |
| CH1 | +5V output |
| CH2 | +15V output |
| CH3 | -5V output |
| CH4 | -15V output |
| COM | Common ground |
Notes
122.5W quad output: +5V/12A, +15V/5A, -5V/1A, -15V/1A. Selectable AC input by switch — verify the switch position before applying power. 199 × 110 × 50 mm enclosed chassis, fanless. Derating above +45°C or +50°C.
Dimensions
Q-120C Dimensions
Enclosed metal chassis with perforated ventilation. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | 199 mm |
| Width (W) | 110 mm |
| Height (H) | 50 mm |
| Weight | Approx. 0.86 kg |
| Housing | Enclosed metal chassis with vents |
Clearances & Mounting
| Top / Bottom | 40 mm / 20 mm |
| Left / Right | 5 mm / 5 mm |
| Adjacent Heat Source | Keep at least 100 mm clearance |
| Mounting | Chassis base mounting holes |
| Cooling | Free air convection (no fan) |
Installation
Q-120C Installation
The Q-120C uses an enclosed chassis design for standalone mounting inside industrial equipment.
01 / 06
Chassis Mounting
Mount the unit on a flat metal surface using the chassis base mounting holes. Secure the unit to prevent vibration and movement.
02 / 06
Ventilation Clearance
Allow at least 5 mm left/right, 40 mm above and 20 mm below. Do not block the perforated ventilation openings.
03 / 06
Input Voltage Selector
Set the 115V/230V selector switch to match the actual mains voltage before applying power. Wrong setting can damage the unit.
04 / 06
FG to PE Required
The FG terminal must be connected to PE (Protective Earth) for safety and EMC performance.
05 / 06
Temperature & Derating
-10 to +60°C. Derate above +45°C or +50°C depending on the load distribution across the four channels.
06 / 06
Indoor Use Only
Install in a dry, well-ventilated location. Do not install near water or in high-moisture environments.
Wiring
Q-120C Wiring & Terminal
Screw-type terminal blocks for input and output. All four outputs share a common ground (COM).
Input Terminal
| Terminal | Function |
|---|---|
| FG | Frame Ground (must connect to PE) |
| AC/N | AC Neutral |
| AC/L | AC Line |
Output Terminal
| Terminal | Function |
|---|---|
| CH1 | +5V output |
| CH2 | +15V output |
| CH3 | -5V output |
| CH4 | -15V output |
| COM | Common ground |
Verify the terminal label on the unit before wiring. The -5V and -15V rails are referenced to COM.
Wiring Specification
| Screw Torque | 6.9 kgf-cm (6 Lb-in) |
| Wire Type | Stranded copper only, 80°C minimum |
| Recommended Wire | 16–18 AWG depending on channel current |
| Screwdriver | 3 mm slotted |
| FG Connection | Must be connected to PE |
Input Configuration
| Input Type | Selectable AC by switch |
| Voltage Range | 88–132VAC / 176–264VAC, or 240–370VDC |
| Frequency | 47–63Hz |
| Inrush Current | Cold start, limited by internal circuitry |
Verify the input voltage selector switch position before applying power. The ±15V rails are referenced to COM, not to earth ground. Do not connect the primary and secondary sides together.
Safety
Q-120C Safety & Cautions
- Qualified technician only. Do not remove the case yourself.
- Do not connect primary and secondary sides together — electric shock / arc hazard.
- Burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Protect ventilation openings from foreign objects and dripping liquids.
- FG must be connected to PE (Protective Earth).
- Do not exceed the rated current on any output channel or the total 122.5W output power.
- Disconnect the system from supply voltage before installation, maintenance or modification.
- Verify the input voltage selector switch position before applying power.
- Component for final equipment; final EMC must be re-confirmed.
Applications
Q-120C Industrial Applications
Instrumentation
Test & Measurement
Laboratory Equipment
Analog / Mixed-Signal Systems
Process Control
Industrial Control Systems
Communication Equipment
Embedded Systems
Next Step
Need the Q-120C (SU55)?
Contact DAPPRA Automation — or explore the full Q Series.
Support
Q-120C FAQ
What is the DAPPRA Q-120C (SU55)?
The Q-120C (internal code SU55) is a 122.5W quad-output enclosed switching power supply delivering +5V/12A, +15V/5A, -5V/1A and -15V/1A from a single chassis. It belongs to the DAPPRA Q Series and provides bipolar ±15V rails for analog and instrumentation applications.
What are the output channels of the Q-120C?
CH1 = +5V/12A, CH2 = +15V/5A, CH3 = -5V/1A, CH4 = -15V/1A, all referenced to a common ground (COM).
What is the input voltage range of the Q-120C?
Selectable AC input: 88–132VAC or 176–264VAC by switch, or 240–370VDC.
What is the efficiency of the Q-120C?
76% typical.
Does the Q-120C require a cooling fan?
No. Free air convection cooling without a fan.
What are the dimensions of the Q-120C?
199 × 110 × 50 mm (L × W × H), enclosed metal chassis with vents.
What protections does the Q-120C include?
Short circuit, overload and over voltage protection.
What is the operating temperature range of the Q-120C?
-10°C to +60°C with derating above +45°C or +50°C.
What certifications does the Q-120C have?
Typically certified to UL and CE standards. Confirm the specific marking on the DAPPRA-labeled unit.
What is the warranty period for the Q-120C?
2 years.
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Overview
Q-120C (SU55) Overview
The DAPPRA Q-120C (internal code SU55) is a 122.5W quad-output enclosed switching power supply delivering +5V/12A, +15V/5A, -5V/1A and -15V/1A from a single chassis. It is the Q Series variant that provides symmetric ±15V rails alongside a high-current +5V rail, making it particularly suited to analog instrumentation, op-amp circuits, signal conditioning and test equipment that require bipolar supply rails.
The Q-120C uses selectable AC input: 88–132VAC or 176–264VAC via an external selector switch, or 240–370VDC. Efficiency is 76% typical. Free air convection cooling is used without a fan, and the enclosed metal chassis measures 199 × 110 × 50 mm.
The four outputs share a common ground (COM), with the -5V and -15V rails referenced to COM. Protection includes short circuit, overload and over voltage protection. The Q-120C is suited to laboratory equipment, process control instrumentation and mixed-signal systems where a +5V digital rail and ±15V analog rails must be generated from one power supply.
Key Features
Q-120C Key Features
A 122.5W quad-output power supply with symmetric ±15V rails for analog and instrumentation loads.
- Quad Output · +5V / +15V / -5V / -15VFour simultaneous DC rails, including symmetric ±15V for op-amps and analog circuits.
- 122.5W Total Output PowerCH1 +5V/12A, CH2 +15V/5A, CH3 -5V/1A, CH4 -15V/1A.
- Selectable AC Input88–132VAC / 176–264VAC by switch, or 240–370VDC.
- 76% Typical EfficiencyBalanced efficiency for a quad-output chassis with bipolar rails.
- Free Air Convection CoolingNo fan — quieter operation and less dust ingress.
- Enclosed Metal Chassis with Vents199 × 110 × 50 mm chassis with perforated ventilation.
- Complete Protection FunctionsShort circuit, overload and over voltage protection.
- -10°C to +60°C Operating RangeWith derating above +45°C or +50°C.
- 2-Year WarrantyStandard Q Series warranty.
Specifications
Q-120C (SU55) Specifications
Output Channels
| Model | Q-120C (SU55) |
| CH1 | +5V / 12A |
| CH2 | +15V / 5A |
| CH3 | -5V / 1A |
| CH4 | -15V / 1A |
| Rated Power | 122.5W |
| Voltage Tolerance (CH1–CH4) | ±2% / 10/-5% / ±6% / 10/-5% (typical) |
| Ripple & Noise (max.) | 80mV / 150mV / 80mV / 150mV (typical) |
Protection
| Short Circuit | Protected, auto-recovery |
| Overload | 105–150% rated output, hiccup mode, auto-recovery |
| Over Voltage | Protected, auto-recovery |
Input
| Voltage | 88–132VAC / 176–264VAC (selectable by switch) · 240–370VDC |
| Frequency | 47–63Hz |
| AC Current (typ.) | 2.8A @ 115VAC · 1.6A @ 230VAC |
| Efficiency (typ.) | 76% |
Isolation & Construction
| Isolation | I/P–O/P: 3000VAC |
| Cooling | Free air convection (fanless) |
| Chassis | Enclosed metal case with ventilation vents |
Environment
| Working Temperature | -10 ~ +60°C (derating above +45°C or +50°C) |
| Storage Temperature | -20 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Pollution Degree | 2 |
Safety & EMC
| Safety Standards | UL / CE (confirm marking on unit) |
| Withstand Voltage | I/P–O/P: 3000VAC |
| EMC Emission | Complies with applicable EN standards (confirm on unit) |
Mechanical
| Dimensions (L×W×H) | 199 × 110 × 50 mm |
| Weight | Approx. 0.86 kg |
| Mounting | Chassis base mounting holes |
| Warranty | 2 Years |
Terminal Assignment
| Terminal | Function |
|---|---|
| FG | Frame Ground (connect to PE) |
| AC/N | AC Neutral |
| AC/L | AC Line |
| CH1 | +5V output |
| CH2 | +15V output |
| CH3 | -5V output |
| CH4 | -15V output |
| COM | Common ground |
Notes
122.5W quad output: +5V/12A, +15V/5A, -5V/1A, -15V/1A. Selectable AC input by switch — verify the switch position before applying power. 199 × 110 × 50 mm enclosed chassis, fanless. Derating above +45°C or +50°C.
Dimensions
Q-120C Dimensions
Enclosed metal chassis with perforated ventilation. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | 199 mm |
| Width (W) | 110 mm |
| Height (H) | 50 mm |
| Weight | Approx. 0.86 kg |
| Housing | Enclosed metal chassis with vents |
Clearances & Mounting
| Top / Bottom | 40 mm / 20 mm |
| Left / Right | 5 mm / 5 mm |
| Adjacent Heat Source | Keep at least 100 mm clearance |
| Mounting | Chassis base mounting holes |
| Cooling | Free air convection (no fan) |
Installation
Q-120C Installation
The Q-120C uses an enclosed chassis design for standalone mounting inside industrial equipment.
01 / 06
Chassis Mounting
Mount the unit on a flat metal surface using the chassis base mounting holes. Secure the unit to prevent vibration and movement.
02 / 06
Ventilation Clearance
Allow at least 5 mm left/right, 40 mm above and 20 mm below. Do not block the perforated ventilation openings.
03 / 06
Input Voltage Selector
Set the 115V/230V selector switch to match the actual mains voltage before applying power. Wrong setting can damage the unit.
04 / 06
FG to PE Required
The FG terminal must be connected to PE (Protective Earth) for safety and EMC performance.
05 / 06
Temperature & Derating
-10 to +60°C. Derate above +45°C or +50°C depending on the load distribution across the four channels.
06 / 06
Indoor Use Only
Install in a dry, well-ventilated location. Do not install near water or in high-moisture environments.
Wiring
Q-120C Wiring & Terminal
Screw-type terminal blocks for input and output. All four outputs share a common ground (COM).
Input Terminal
| Terminal | Function |
|---|---|
| FG | Frame Ground (must connect to PE) |
| AC/N | AC Neutral |
| AC/L | AC Line |
Output Terminal
| Terminal | Function |
|---|---|
| CH1 | +5V output |
| CH2 | +15V output |
| CH3 | -5V output |
| CH4 | -15V output |
| COM | Common ground |
Verify the terminal label on the unit before wiring. The -5V and -15V rails are referenced to COM.
Wiring Specification
| Screw Torque | 6.9 kgf-cm (6 Lb-in) |
| Wire Type | Stranded copper only, 80°C minimum |
| Recommended Wire | 16–18 AWG depending on channel current |
| Screwdriver | 3 mm slotted |
| FG Connection | Must be connected to PE |
Input Configuration
| Input Type | Selectable AC by switch |
| Voltage Range | 88–132VAC / 176–264VAC, or 240–370VDC |
| Frequency | 47–63Hz |
| Inrush Current | Cold start, limited by internal circuitry |
Verify the input voltage selector switch position before applying power. The ±15V rails are referenced to COM, not to earth ground. Do not connect the primary and secondary sides together.
Safety
Q-120C Safety & Cautions
- Qualified technician only. Do not remove the case yourself.
- Do not connect primary and secondary sides together — electric shock / arc hazard.
- Burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Protect ventilation openings from foreign objects and dripping liquids.
- FG must be connected to PE (Protective Earth).
- Do not exceed the rated current on any output channel or the total 122.5W output power.
- Disconnect the system from supply voltage before installation, maintenance or modification.
- Verify the input voltage selector switch position before applying power.
- Component for final equipment; final EMC must be re-confirmed.
Applications
Q-120C Industrial Applications
Instrumentation
Test & Measurement
Laboratory Equipment
Analog / Mixed-Signal Systems
Process Control
Industrial Control Systems
Communication Equipment
Embedded Systems
Next Step
Need the Q-120C (SU55)?
Contact DAPPRA Automation — or explore the full Q Series.
Support
Q-120C FAQ
What is the DAPPRA Q-120C (SU55)?
The Q-120C (internal code SU55) is a 122.5W quad-output enclosed switching power supply delivering +5V/12A, +15V/5A, -5V/1A and -15V/1A from a single chassis. It belongs to the DAPPRA Q Series and provides bipolar ±15V rails for analog and instrumentation applications.
What are the output channels of the Q-120C?
CH1 = +5V/12A, CH2 = +15V/5A, CH3 = -5V/1A, CH4 = -15V/1A, all referenced to a common ground (COM).
What is the input voltage range of the Q-120C?
Selectable AC input: 88–132VAC or 176–264VAC by switch, or 240–370VDC.
What is the efficiency of the Q-120C?
76% typical.
Does the Q-120C require a cooling fan?
No. Free air convection cooling without a fan.
What are the dimensions of the Q-120C?
199 × 110 × 50 mm (L × W × H), enclosed metal chassis with vents.
What protections does the Q-120C include?
Short circuit, overload and over voltage protection.
What is the operating temperature range of the Q-120C?
-10°C to +60°C with derating above +45°C or +50°C.
What certifications does the Q-120C have?
Typically certified to UL and CE standards. Confirm the specific marking on the DAPPRA-labeled unit.
What is the warranty period for the Q-120C?
2 years.
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