Factory wholesale Miniature circuit breaker-FTM8-LE to Germany Manufacturer


Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Product illustration:

Technical Data

Model FTM8LE Residual current circuit-breaker
Number of poles IP+N,2P,3P,3P+N,4P
Rated frequency: AC 50/60Hz
Rated voltage (V) AC 230/400
 Rated current (A) C D 1,3,6,10,16,20,25,32,40,50,63 1,3,6,10,16,20,25,32,40,50,63
Rated residual operating current(mA) 30
Rated residual non-operating current(mA) 15
Residual current breaking time 30mA≦0.1s  250mA≦0.04s
Rated short-circuit breaking capacity(KA) 6(In≦40A); 4.5(In﹥40A)
Rated residual current breaking capacity(KA) 3
Mechanical & electrical life: 10,000 operations
protection rating Ip20
Installation On DIN rail 35mm according to JB6525
Connection capacity: Cross-section of conductors up to 25mm2
Tightening torque 2 Nm
Ambient temperature (°C) -5°C ~ +40°C
Altitude (m) ≤2000m
Relative air humidity no more than 95%
pollution degree
installation condition Used in place without obvious shock and vibration
 Weight (g) ≦32A ﹥40A ≦32A ﹥40A ≦32A ﹥40A ≦32A ﹥40A ≦32A ﹥40A
216 240 320 343 445 473 468 518 585 63

Exterior and dimensions



 Number  of poles Rated current
<40A ≥40A
Width (mm) Modules Width(mm) Modules
1 /2 45 2.5 54 3
2/2 63 3.5 72 4
3/3 90 5 103.5 5.75
3 /4 99 5.5 117 6.5
4/4 117 6.5 135 7.5

Why is my water heater blowing fuses?

That’s more common with an electric furnace or air conditioner.

That does not help me with my water heater that isn’t heating water.

My first question is whether or not you’ve plugged it in correctly. A hot water heater usually needs to be plugged into a properly wired connection, not the wall outlet.

The only thing plugged into a wall outlet in the water heater is the leak monitoring system.

If you have too many things plugged into the same connection as the water heater, like a clothes dryer, the load could blow the fuse.

The clothes dryer has its own electrical plug.

Check the fuses themselves. If you blew a fuse during a thunder storm and put a new fuse in that’s too low for the load, it will keep blowing when both heating elements in the water heater turn on.

If the fuse was too low for a hot water heater, I’d be replacing the other half dozen fuses in the box. But I do not have to, while the other fuses handle heavy loads.

You might have problems with the heating elements drawing way too much power, blowing the fuse.

That does not sound good.

If it is pulling too much power, you have an electrical problem.

You’d think there was a safety precaution in place to prevent that.

There is, the fuse. And if the heating elements are way too hot, they may get shut down via overheating sensors and the temperature pressure relief valves.

What else could be blowing the fuses, if it isn’t excessive power draw? After all, the thing does not seem to be overheating.

It could be as simple as a loose wire. Or it could be something as complicated as a water leak on the wiring that is shorting out the fuses.

I did not think it was a water leak, since the water leak sensor is not going off.

It won’t go off if the water leak detector has shorted out, or if the water leak is near the top of the wiring and dripping down the wires and down the wall.

I’ll check for the leaks, but what else could it be?

A bad heating element that is drawing way too much power when kicked in.

That’s at least an easy thing to replace. And common too.

If one heating element is bad, you’re drawing extra power running the remaining one more often, until that one burns out too.

I’d know that happened if I cannot get hot water after replacing the breaker.

You can blow a fuse if the t-stat or temperature thermostat is bad too, causing it to draw too much current before getting things too hot.

At least now I have an idea of what to replace before the repairman burns a hole in my wallet.

1997 Ford E350 Four Winds 23ft RV- $11999 [SOLD]

Sadly, it’s time to say goodbye our beloved “Betty Bungalow” (our Motor Home for the last 3 years). She has treated us very well, and we’ve kept her in pristine condition and made loads of upgrades (see details below). Owned and upgraded by a cabinet maker. Easy to drive. Super Clean, VERY RELIABLE, and everything is fully functional. No Pets, No smoking.

1997 Ford V10 E350 chassis with dual rear wheels
Four WInds 5000 Motor Home Class C
Millage 63,300

The V10, gives plenty of power for the Yosemite mountains and steep climbs. You can drive this baby 65mph.

-Norcold 3 way REFRIGERATOR and FREEZER. runs on AC, LP gas or 12v battery. Full functional, ice cold. (one of the favorite features for camping)
-3 burner LP gas STOVE
-LP gas OVEN
-lots of STORAGE
-Counter and double SINK over looks back window for VIEW.
-Hot Water in minutes

-Hot and Cold standing SHOWER
-Hot and Cold SINK
-flush toilet
-huge mirror

-Siemens SOLAR PANEL on roof. charges house batteries.
-Generator: Cummins 4000 Onan Genset Gasoline Generator. JUST 344 HOURS. with push button start from inside RV.
-12v deep cycle BATTERY (in addition to 12v engine starter battery) the cabin battery is also charged by the motor as you drive.
-800 Watt INVERTER. for supplying 120v power off the 12v deep cycle battery
-all house lights UPGRADE to LED for efficiency

Tanks and plumbing
-45 Gasoline tank (supplies engine and generator)
-approx 12 Gal Liquid Propane tank
–approx 20 Gal Grey Water
–approx 25 Gal Black Water
–approx 30 Gal Fresh Water
-Hot Water Heater. runs on LP gas
-12v water pump to supply fresh water to sinks, shower, toilet.

Climate Control
-AC roof mounted. Runs ice cold off generator (120v) or shore power (120v)
-air forced FURNACE. runs off propane and 12v battery. super warm and no need to run generator.

-cruise control
-dual airbags
-A/C in cab and AC on roof.
-trailer hitch
-Terrific two way shades that cover big windows, with screens, one over the side couch and one opposite
-lots of hooks
-lots of storage bins
-huge closet
-upgraded extra deep drawers with ball bearing slides
-lots of cup holders
-four skylights

-Sleeps five or six, two in upper bunk over cab, one or two cozily on fold down couch, two children on dinette fold down dinette, dinette serves four easily.
-The bunk area is big enough for queen bed.
-I will also include the custom bed platform I built an additional sleeper across the front cab (over the drive and passenger seats) Great for one kid or small adult. This way you can leave the table setup.

New Roof in 2013
Aluminum Frame motor home construction. No rotting wood or water damage.

-NEW rear Tires in 2013 (dually rear wheels)
-front Michelin TIRES low miles (top of the line)
-full sized spare tire.
-7 tires and rims tota
brand new cable Snow Chains

upgrades and extras
-cabin lights LED
-custom mulit color LED ceiling lights. with programmable wireless remote. (See photos)
-NEW ROOF in 2013
-There are no roof or window leaks, we have maintained this nicely.
-all service records included
-all appliance manuals included
-no original awning. however, I will include our custom wind-proof awning Shade Structure, designed specifically to withstand the windy playa. 12ft by 20 ft (see photos)
-CD Player

-4 stabilizer jack, for keeping the RV more stable while parked
-fresh water hose. designed especially for drinking water for filling fresh water tank.
-sewer hose, and attachments
-custom make extra large step for easier entry into RV.


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