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Autonics SPR3-425NFF Thyristor Power Controller
The Autonics SPR3-425NFF Power Controller offers 3-phase, 25A load current, Phase control: 0 to 98%, Cycle control: 0 to 100%, ON/OFF control: 0 to 100% output range, 100-240VAC~ 50/60Hz power supply. Manufactured by Autonics under the Autonics Power Controller category, this model belongs to the SPRM Series.
| Brand | Autonics |
| Product Type | Power Controller |
| Model Number | SPR3-425NFF |
Autonics SPR3-425NFF Thyristor Power Controller β Technical Specifications
| Specification | Value |
|---|---|
| Control phase | 3-phase |
| Rated load voltage | 440VAC~ |
| Rated load current | 25A |
| Display method | 3-digit 7-segment LED |
| Control input | αAuto control: DC4-20mA, 1-5VDC @(=), ON/OFF contact (no-voltage input), pulse voltage (5-12VDC @(=)) αManual control: outside adjuster (10kΞ©), inside adjuster (output limit) |
| Digital inputs | RUN/STOP switching, AUTO/MANU switching, RESET |
| Output_Alarm | 250VAC~ 3A, 30VDC @(=) 3A, 1c resistive load |
| Cooling method | Natural cooling |
| Control method | αPhase control: normal control mode, constant current/constant voltage/constant power feedback control modeαCycle control: fixed cycle control modeαON/OFF control |
| Applied load | αPhase control, ON/OFF control: resistance load, inductive loadαCycle control: resistance load |
| Output range | Phase control: 0 to 98%, Cycle control: 0 to 100%, ON/OFF control: 0 to 100% |
| Power supply | 100-240VAC~ 50/60Hz |
| Min. load current | 1A |
| Power consumption | Max. 14VA |
| Insulation resistance | Over 200MΞ© (at 500VDC megger) |
| Dielectric strength | 2,000VAC~ 50/60Hz for 1 min (between input terminals and power terminals) |
| Output leakage current | Max. 10mArms |
| Noise immunity | Β±2kV the square wave noise (pulse width: 1γ²) by the noise simulator |
| Memory Protection | β 10 years (non-volatile semiconductor memory type) |
| Vibration | 0.75 mm amplitude at frequency of 5 to 55 Hzin each X, Y, Z direction for 2 hours |
| Vibration_Malfunction | 0.5mm amplitude at frequency of 5 to 55Hz in each X, Y, Z direction for 10 min |
| Environment_Ambient temperature | -10 to 55β, storage: -20 to 80β |
| Environment_Ambient humidity | 35 to 85% RH, storage: 35 to 85% RH |
| Allowable voltage range | 90 to 110% of rated voltage |
| Indicator | αOperation indicator/Manual control indicator: green LEDαAlarm indicator/output indicator/unit (V, A) indicator: red LED |
| Output accuracy | αNormal control: within Β±10% F.S. of rated load voltageαConstant current feedback control: within Β±3% F.S. of rated load currentαConstant voltage feedback control: within Β±3% F.S. of rated load voltageαConstant power feedback control: within Β±3% F.S. of rated load power |
| Setting type | By front keys, by communication |
| Function | Output limit (OUT ADJ), AUTO/MAN selection, control method selection, RESET, SOFT START, SOFT UP/DOWN, output high/low limit, input correction, input slope correction, monitoring (control input, load voltage/current/power/resistance, power supply frequenc |
| Function_Alarm | Overcurrent alarm, overvoltage alarm, fuse break alarm, SCR error alarm, heater break alarm, heatsink overheat alarm |
| Accessories | 11-pin connector, isolating barrier: 4 |
| Weight | Approx. 4.9kg(approx. 4.1kg) |
Autonics SPR3-425NFF Power Controller is a compact slim 3-phase power controller with LED, engineered for stable and efficient load regulation. Designed for a rated load current of 25A at 440VAC~, it integrates a 3-digit 7-segment LED display for clear monitoring and setup. Input options include DC4β20mA, 1β5VDC, ON/OFF contacts, and pulse voltage, making it versatile for different automation architectures.
The SPR3-425NFF supports multiple control modes including phase control with feedback for voltage, current, and power stabilization, as well as cycle and ON/OFF control. With natural cooling, the unit reduces maintenance requirements while ensuring reliable long-term operation. It offers alarms for overcurrent, fuse break, SCR errors, and heater break, supported by insulation resistance of over 200MΞ© and dielectric strength of 2,000VAC~. Low power consumption of 14VA and an operating range of β10Β°C to +55Β°C make it dependable in industrial environments where precision and stability are essential.
Applications of the Autonics SPR3-425NFF include heaters, ovens, furnaces, packaging equipment, and inductive load management in process industries. Maintenance teams value its straightforward setup via front keys and communication-based configuration, while engineers trust its efficiency and durability in continuous-duty operations. As part of the Autonics SPR3 series, this model provides flexibility, compact design, and proven safety features for automation systems.
The Autonics SPR3-425NFF stands out among Autonics Power Controllers for balancing compact design with advanced performance. Supported by the detailed Autonics SPR3 manual, it ensures safe operation, easy integration, and long service life. Learn more on the official Autonics Power Controllers page.
