Circutor computer SMART III F6-12Vdc PF Controller

A 6-step fast regulator with 12 Vdc outputs for two-phase EMB static switches

The Circutor computer SMART III F6-12Vdc (code R13953) is the 12 Vdc output version of the SMART III Fast regulator. Instead of the 24 Vdc opto-MOSFET outputs of the Fast 6, it drives six EMB-2PH static switching modules from voltage outputs of 12 V (+/-1 V) at up to 20 mA each, which suits banks built with two-phase static switches.

Its measuring functions are those of the SMART III family: one or three current transformers, integral power analyzer, leakage current input, up to four objective cos phi values, programmable alarms and capacitor testing. Circutor describes the fast regulators as the ideal solution for loads that vary between 40 ms and 4 seconds.

computer SMART III F6-12Vdc functions

• 6 steps with 12 Vdc voltage outputs (20 mA) for EMB-2PH switching units
• Static switching for fast load changes between 40 ms and 4 seconds
• Three-CT or one-CT measurement, …/5 A or …/1 A
• 100 to 520 Vac supply; 10 to 15 VA consumption
• Leakage current input 0.01 to 1.5 A; RS-485 Modbus RTU
• Alarm and fan relays; two NPN transistor outputs; two digital inputs
• 4 LED indicators, custom LCD and capacitive 5-key keyboard

computer SMART III F6-12Vdc technical specifications

Identification and supply

Measurement

Inputs and outputs

Mechanical and environmental

F6-12Vdc or a contactor model?

Choose this model when the capacitor steps are switched by EMB-2PH static modules that expect a 12 Vdc control signal. The F12-12Vdc (R13964.) offers 12 steps of the same type, and the Fast 6 and Fast 12 use EMF or EMB modules with transistor outputs. Contactor-based banks should use the SMART III 6, 12 or 14. Match the static switch part number with Circutor before ordering, and tell us the bank voltage, step sizes and CT ratio.

Installation and operation notes

The unit fits a 144 x 144 mm panel cut-out and weighs 0.53 kg. Wire the 12 Vdc step outputs to the corresponding static modules and keep control wiring away from power cables. The datasheet states a maximum altitude of 2000 m and a working temperature range of -10 to +55 C. Set the number of steps, target cos phi values and alarm limits from the keypad, and check the CT connection (one or three transformers) in the measurement menu.

Where the F6-12Vdc is used

Circutor lists welding, cranes, lifts, smelters, hospitals and the automotive industry as fast-load applications. Static banks built with EMB-2PH modules are used where contactor wear or step delay would be a problem, for example repetitive spot welding. The datasheet itself gives only the application list; bank design is up to the panel builder.

Selection and installation notes

Before ordering a power factor regulator, collect the data the sizing depends on: the supply voltage and frequency, the current transformer ratio and where the transformer is fitted, the number and size of the capacitor steps, the contactor or static switch type and whether harmonics are present on the network. Fit the current transformer upstream of both the load and the capacitor bank so that the regulator sees the net current, connect it with the polarity shown in the manual and let the regulator run its automatic set-up before the first start. Check the alarm and relay settings and write the final values on the commissioning record so that later service work starts from a known state.

This version drives 12 Vdc outputs, so confirm that the switching modules you plan to use accept that control signal before ordering.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Related Circutor items

The Fast 6 (R13951.) is the transistor-output sibling, and the SMART III 14 (R13864.) is the contactor model. The datasheet also lists the F12-12Vdc (R13964.) and Fast 12 (R13962.).

Frequently asked questions

What control signal does the F6-12Vdc output?

Six 12 Vdc (+/-1 V) voltage outputs, 20 mA each, for EMB-2PH static modules.

How many steps does it control?

Six.

How does it differ from the Fast 6?

It has 12 Vdc outputs for EMB-2PH modules instead of the 24 Vdc opto-MOSFET outputs for EMF or EMB modules.

What supply does it need?

100 to 520 Vac, 50 to 60 Hz.

Is Seven Star LLC a distributor of Circutor?

No. Seven Star LLC is not a Circutor distributor; it is an independent Muscat supplier that obtains genuine Circutor products against customer enquiries.

Documents and quotation

Manufacturer document: the computer SMART III F6-12Vdc datasheet (generated 21/10/2026), hosted on this page. Compare it with the instruction manual before you confirm the exact style or order code. Seven Star LLC supplies Circutor items from Muscat to buyers in Oman and the wider GCC; send the model, option code and quantity through the quotation form for availability. Pricing is on request, and every rating or approval should be re-checked against the current maker documents. More: Electrical & Power and the Circutor brand page.