AI-generated illustration, not a photograph of a specific product
Running TOMIX FineTrack, the controller question looks like a spec comparison — the FG-17 that came in a starter set, the knob-operated N-600 and N-1001-CL, the single-handle N-DU101-CL, and a wide price spread between them. The instinct is to compare output and buy the biggest. That is the wrong first question.
The four units in one table
| Model | Rated output | Constant lighting | Turnout / TCS port | Control | Japan list price |
|---|---|---|---|---|---|
| FG-17 | 500 mA | No | No | Simple knob | Supplied in starter sets |
| N-600 (5507) | 1.0 A | No | Yes | Knob plus direction switch | ¥7,700 |
| N-1001-CL (5506) | 1.2 A | Yes | Yes | Main knob plus CL adjustment | ¥14,080 |
| N-DU101-CL (5517) | 1.2 A | Yes | Yes | Single handle, eight positions (P/N/B/EB) | ¥17,380 |
All are 0–12 V to the track. Japanese list prices including tax on the date checked; TOMIX does not run a US store, so what you pay elsewhere depends on your importer — read these as the relative cost of the options. There is also a wireless N-WL10-CL (1.2 A, CL, ¥26,180), with less predictable availability — worth evaluating only if you specifically want wireless.
Three questions, in this order
One: do you want the lights on when the train is stopped? This is the real dividing line. The N-600 has no constant lighting; the N-1001-CL and N-DU101-CL do. But note the caveat carefully — a controller having CL does not mean any vehicle will keep its lights on. The vehicle also needs a compatible constant-lighting board or interior lighting unit. Both halves have to be right; see the interior lighting guide.
Two: do you want a speed knob, or to feel like you are driving? The N-1001-CL is an intuitive knob. The N-DU101-CL packages the same 1.2 A behind a single handle with eight positions — three power steps, coasting, three braking steps and emergency stop — like operating a real electric train. What you pay extra for is the operating experience, not more output, and not DCC.
Three: is your total current inside the rating? Add up the motor, head and tail lights and any interior lighting; do not count cars. TOMIX's own beginner material works an example of 300 mA motor + 60 mA headlight + 60 mA tail light = 420 mA. Use the calculator below for a first pass.
Current budget calculator
Enter figures taken from instruction sheets or manufacturer data. The 20% is this site's conservative planning margin, not an official safety rule — it just leaves you some headroom.
This is a first-pass screen for whether the total exceeds a nominal rating — nothing more. Inrush current, the condition of older models and voltage drop along the run can all change the outcome. If you land near or over the rating, reduce the load or split it across more than one controller.
Our advice: most people want the N-600 or the N-1001-CL
Four models looks like a difficult choice, and for most people it is not:
- You want trains to run, you will use electric turnouts, and you are not attached to lights at a stand → the N-600 is plenty, and it is the cheap one.
- You want that atmosphere of a stopped train with its interior still lit (with compatible stock) → the N-1001-CL. This is the upgrade most people actually make.
- You are a heavy user who enjoys operating like a driver → only then is the N-DU101-CL's handle worth it.
Three ways people buy the wrong thing
- The FG-17. The 500 mA simple unit bundled with starter sets, with no turnout or TCS port — so it cannot drive electric turnouts at all. Do not assume a short train is automatically within its capacity either, and do not treat it as the core of an expanding layout.
- What is actually in the box. The N-600, N-1001-CL and N-DU101-CL are sold as the power unit plus its adapter, nothing else — no D.C. Feeder, no Point Control Box. Upgrading from a starter set means buying those at the same time, or you will own a controller that cannot reach the rails.
- CL is not DCC. Constant lighting keeps the lights on at a stand; TCS is TOMIX's control peripheral system. Neither makes a vehicle independently addressable.
Feeders, turnouts and two-train operation
All of these units have a single D.C. Feeder output. Adding more feeders improves supply along a long run, but as long as they come from one controller they remain one control output — both trains obey the same knob. Running two trains separately needs isolated sections plus a second controller; the reasoning is in the feeder and voltage drop guide. Connectors do not cross brands either, which the compatibility guide covers.
Buying one outside Japan
TOMIX's adapter-fed power units are stated as usable on 100–240 V, which covers essentially every domestic supply — so the mains voltage is not the obstacle. Two things are: the plug shape may need an adapter, and you should use the specified original adapter rather than substituting an unknown supply, because the wrong voltage damages vehicles.
Practical advice: if you are already running TOMIX FineTrack, use a TOMIX controller — it is the simplest connection and everything matches. Cross-connecting a KATO controller is electrically similar in principle but brings plug adaptation and warranty questions that are not worth inviting. And if DCC is where you eventually want to be, this range is not the route: TOMIX states its products do not support DCC, so that means changing systems, not upgrading the controller. The equivalent decision on the other side is in the KATO power pack guide, and whether you need DCC at all is in DC vs DCC.
Sources
Last checked 2026-08-01. Model numbers, ratings, constant lighting availability, ports and prices follow TOMIX's own product pages and beginner material; the DCC position is from the TOMIX support FAQ. For any specific unit, its instruction sheet takes precedence over this article.
- TOMIX N gauge products — power unit model numbers, ratings and ports
- TOMIX beginner material — the worked current example
- TOMIX support FAQ — DCC support position
Compare it against the other system before you commit
TOMIX power units: common questions
Which TOMIX power unit should I buy?
Answer the constant lighting question first, then current, then how you like to drive. If you do not need lights that stay on at a stand and you want to operate electric turnouts, the N-600 at 1.0 A is enough and it is the cheapest of the real options. If you want constant lighting and prefer a knob, the N-1001-CL at 1.2 A is the usual upgrade. If you also want a single-handle simulated driving experience, the N-DU101-CL is the same 1.2 A in a different control style. The FG-17 is the 500 mA starter-set unit and is not an expansion base.
What does CL mean on a TOMIX power unit?
Constant lighting — the lights stay on when the train is stopped. It is the single biggest dividing line in the range, because the N-600 does not have it while the N-1001-CL and N-DU101-CL do. Important caveat: a controller having CL does not mean any vehicle will keep its lights on. The vehicle also needs a compatible constant-lighting board or interior lighting unit. Both halves have to be right.
Is the N-DU101-CL more powerful than the N-1001-CL?
No — they have exactly the same 1.2 A rating. The N-DU101-CL is more expensive because of the control style: a single handle with eight positions covering three power steps, coasting, three braking steps and emergency stop, which mimics driving a real train. The extra money buys the feel of operating, not more output and certainly not DCC. If you only want constant lighting and are not attached to the driving experience, the N-1001-CL does the same electrical job for less.
How do I work out how much current I need?
Add up everything that draws power — the motor, head and tail lights, and any interior lighting — rather than counting cars. TOMIX's own beginner material gives a worked example of 300 mA for the motor plus 60 mA for the headlight plus 60 mA for the tail light, totaling 420 mA. Anything on the turnout or TCS port is added on top. Use the calculator on this page for a first pass, then check each item's own documentation.
Is the FG-17 in my starter set good enough to keep?
It is fine for running the set it came with, but it is not an expansion base. It is a simple 500 mA unit with no turnout or TCS port, so it cannot drive electric turnouts at all. Do not assume a short train is automatically within its capacity either — a fully lit formation can consume far more than the car count suggests.
What comes in the box with an N-600 or N-1001-CL?
The power unit and its adapter, and that is all. The D.C. Feeder and the Point Control Box are not included, so if you are upgrading from a starter set you need to buy those separately or you will have a controller with no way to reach the rails or throw a turnout. Budget for them at the same time.
Can two feeders from one TOMIX power unit run two trains separately?
No. These units have a single D.C. Feeder output. Adding more feeders improves supply along a long run, but if they all come from one controller they are still one control output — both trains get the same speed and direction. Independent operation requires isolated sections and a second controller.
Does constant lighting or TCS mean TOMIX supports DCC?
No. Constant lighting simply keeps the lights on at a stand, and TCS is TOMIX's own control peripheral system. Neither turns a vehicle into an independently addressed DCC locomotive, and TOMIX states that its products do not support DCC systems. If DCC is where you want to end up, this range is not the path to it.
