Before procurement teams confirm SPR3-450TFF, they typically review Autonics Proximity Sensor, Autonics Spc1 35 and Autonics Digital Counter to double-check performance ratings, stock availability, and supplier credibility carefully.
Autonics SPR3-450TFF Thyristor Power Controller
The Autonics SPR3-450TFF Power Controller offers 3-phase, 50A 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 | SPR3-450TFF |
Autonics SPR3-450TFF Thyristor Power Controller – Technical Specifications
| Specification | Value |
|---|---|
| Control phase | 3-phase |
| Rated load voltage | 440VAC~ |
| Rated load current | 50A |
| Display method | 3-digit 7-segment LED |
| Control input | ᆞAuto control: DC4-20mA, 1-5VDC @(=), ON/OFF contact (no-voltage input), pulse voltage (5-12VDC @(=)) ᆞManual control: outside adjuster (10kΩ), inside adjuster (output limit) |
| Digital inputs | RUN/STOP switching, AUTO/MANU switching, RESET |
| Output_Alarm | 250VAC~ 3A, 30VDC @(=) 3A, 1c resistive load |
| Output_Communication | RS485 communication output (Modbus RTU method), max. connection: 31 units |
| Cooling method | Natural cooling |
| Control method | ᆞPhase control: normal control mode, constant current/constant voltage/constant power feedback control modeᆞCycle control: fixed cycle control modeᆞON/OFF control |
| Applied load | ᆞPhase control, ON/OFF control: resistance load, inductive loadᆞCycle 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 200MΩ (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 | ±2kV the square wave noise (pulse width: 1㎲) by the noise simulator |
| Memory Protection | ≈ 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 55℃, storage: -20 to 80℃ |
| Environment_Ambient humidity | 35 to 85% RH, storage: 35 to 85% RH |
| Allowable voltage range | 90 to 110% of rated voltage |
| Indicator | ᆞOperation indicator/Manual control indicator: green LEDᆞAlarm indicator/output indicator/unit (V, A) indicator: red LED |
| Output accuracy | ᆞNormal control: within ±10% F.S. of rated load voltageᆞConstant current feedback control: within ±3% F.S. of rated load currentᆞConstant voltage feedback control: within ±3% F.S. of rated load voltageᆞConstant power feedback control: within ±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) |
The Autonics SPR3-450TFF offers advanced control functions to ensure stable and safe operation in modern automation environments. Supporting a rated load voltage of 440VAC and current capacity of 50A, this Slim 3-Phase Power Controller with LED is optimized for heavy-duty systems where accuracy is essential. Engineers can manage operations through auto or manual inputs such as DC4-20mA, 1-5VDC, ON/OFF contact, or pulse signals. A 3-digit LED display provides clear monitoring of load status, while RS485 Modbus RTU communication enables connection of up to 31 units for scalable plant integration. Built-in alarms for overvoltage, overcurrent, fuse breaks, SCR errors, and heater failures add strong protection, and the natural cooling design minimizes maintenance. Compact, durable, and backed by trusted Autonics SPR3 technology, the SPR3-450TFF ensures precise power control across various applications.
Applications of the SPR3 450TFF Autonics extend across furnaces, ovens, heaters, extrusion systems, and packaging lines that demand precise temperature and power regulation. In food processing, this controller maintains reliable heating cycles for baking and sealing, while in plastics and chemical manufacturing, it ensures steady load control to improve production safety. Its AUTO/MAN switching, RESET functions, and scalable communication allow maintenance engineers to minimize downtime, making the Autonics SPR3-450TFF a trusted solution in industrial automation plants. Recognized by wholesalers, dealers, and distributors, this controller supports industries where dependable Phase Power Products are essential for long-term efficiency and operational stability.
The Autonics SPR3 450TFF represents the next generation of Phase Power Products engineered for durability, accuracy, and scalability. With its Slim 3-Phase Power Controller with LED design, this model addresses the needs of industries looking for compact yet powerful automation solutions. Professionals searching for SPR3, SPR3 Autonics, Autonics Power Controller, or SPR3 450TFF Autonics will find this unit ideal for applications where consistent performance, reduced downtime, and long-term reliability are critical to plant success.
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