SPR3-470NFF Autonics Power Controller
Autonics SPR3-470NFF Slim 3-Phase SCR Power Controller (70A, Feedback Control, Fuse Supported)
High-performance slim 3-phase SCR power controller with 70 A rated load current and advanced feedback control.
Supports constant current, voltage, and power control, ideal for industrial heaters and furnaces.
The Autonics SPR3-470NFF is a slim-design 3-phase SCR power controller engineered for precise and stable control of industrial heating loads. Featuring advanced feedback control (constant current, voltage, and power), 70 A rated output, and high-performance SCR modules, it is ideal for electric furnaces, heater banks, and high-reliability OEM heating systems.
Key Features
3-phase slim-type SCR power controller
Rated load current: 70 A
Feedback control supported
– Constant current
– Constant voltage
– Constant powerPhase control, Cycle control & ON/OFF control
Real-time monitoring of voltage, current, power, resistance & heat-sink temperature
LED digital display
Fuse-supported model (F option)
Various alarm protections (over-current, fuse break, heater break, over-temperature)
High-performance IXYS SCR
Easy installation with mounting brackets
Optional RS485 (Modbus RTU) models available (series-level)
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SPR3-470NFF |
| Series | SPR3 |
| Control Phase | 3-Phase |
| Rated Load Voltage | 440 VAC, 50/60 Hz |
| Rated Load Current | 70 A |
| Control Methods | Phase/Cycle/ON-OFF |
| Control Mode | Normal + Feedback (CC / CV / CP) |
| Control Input | 4–20 mA, 1–5 VDC, Contact, External Adjuster |
| Feedback Control | Constant Current / Voltage / Power |
| Display | 3-digit 7-segment LED |
| Alarm Output | 250 VAC 3A / 30 VDC 3A (1c) |
| Cooling Method | Forced air cooling (fan) |
| Protection Rating | Panel mounted (industrial grade) |
| Operating Temperature | −10 to +55 °C |
| Certifications | CE, KC (model dependent) |
Applications
Electric furnaces & kilns
Industrial heater banks
Infrared & resistance heaters
Plastic & rubber processing machines
Textile drying systems
OEM heater control panels
Power regulation systems
What’s in the Box?
SPR3-470NFF Power Controller
11-pin control connector
Insulating barriers × 4
Mounting brackets
Instruction manual
FAQ
Q1. What does “NFF” indicate in the model?
N = Normal + Feedback control,
F = Fuse supported,
F = Fuse supported (model configuration).
Q2. What type of load is supported?
Designed mainly for resistive heating loads; inductive loads are allowed in phase control mode within ratings.
Q3. Does it support constant power control?
Yes, it supports constant current, voltage, and power feedback control.
Q4. Is a cooling fan included?
Yes, forced air cooling is used for 70 A models.
Q5. Is RS485 communication available?
RS485 is available in T-option models of the SPR3 series.