Description
The Keyence CA-U4 is an ultra-compact 24 VDC switch-mode power supply designed to deliver stable DC output for industrial automation and vision systems. With universal input compatibility and high efficiency, the CA-U4 ensures reliable power delivery for sensors, controllers, and equipment operating under demanding factory conditions.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Keyence |
| Category |
Power Supplies |
| Part Number |
CA-U4 |
| Subcategory |
Power Supply |
| Type |
24 VDC Switch-Mode Power Supply |
| Rated Input Voltage |
85 to 264 VAC, 47–63 Hz / 110 to 370 VDC |
| Rated Input Current |
2.2 A or less (100 VAC) / 1.1 A or less (200 VAC) |
| Efficiency |
82% (100 VAC), 85% (200 VAC) at 100% load |
| Rated Output Voltage |
24 VDC |
| Rated Output Current |
6.5 A |
| Overvoltage Protection |
Constant current drop method with automatic recovery |
| Protection Activation Level |
Activates at 26.4 V or more |
| Safety Standards |
UL508, UL60950-1, CSA C22.2, EN60950-1, EN50178, IEC60950-1 |
| EMC Standards |
FCC Part15B Class A, EN55011 Class A, EN61000-6-2 |
| Harmonic Emission Limit |
EN61000-3-2 compliant |
| Operating Temperature Range |
-10 to +55 °C (14 to 131 °F) |
| Storage Temperature Range |
-20 to +70 °C (-4 to 158 °F) |
| Operating Humidity |
85% RH or less (no condensation) |
| Mounting Method |
DIN rail |
| Cooling Method |
Natural air convection |
| Material |
Metal housing with screw terminals |
| Dimensions |
Ultra-compact design for control cabinet installation |
| Weight |
Approx. 700 g (1.45 lb) |
Information About CA-U4
The CA-U4 is part of Keyence’s CA Series power supplies, engineered to provide efficient and reliable DC power in compact form factors. It supports a wide input voltage range from 85 to 264 VAC (47–63 Hz) and delivers a 24 VDC, 6.5 A output suitable for a variety of Keyence controllers and peripheral devices. Built with overvoltage protection and automatic recovery, the CA-U4 maintains safe operation during power fluctuations. Designed for DIN rail mounting, it offers a durable solution for control cabinets requiring space-saving, energy-efficient, and safety-certified power sources.
Key Features:
- Wide Input Range: Accepts 85–264 VAC or 110–370 VDC input for global power compatibility.
- High Efficiency: Delivers up to 85% efficiency at 200 VAC under full load for reduced energy consumption.
- Stable 24 VDC Output: Provides a constant 24 VDC, 6.5 A output suitable for industrial electronics.
- Overvoltage Protection: Automatic current drop and recovery ensures safe operation during surges.
- Compact Form Factor: Ultra-compact switch-mode design for tight installation spaces.
- DIN Rail Mounting: Enables fast, secure installation in control panels and enclosures.
- Industrial Durability: Operates reliably from -10 °C to +55 °C in harsh environments.
- Global Safety Compliance: Certified under UL, CSA, EN, and IEC safety standards.
- Harmonic Current Limiting: Meets EN61000-3-2 for improved electromagnetic compatibility.
- Low Maintenance: Automatic restart function after voltage interruption for reduced downtime.
The CA-U4 delivers the reliability and performance required for powering automation controllers, sensors, and vision systems in industrial environments.
