Installers order the Simu T5Hz 25Nm 18rpm 120V (2005134) for one reason above the rest: it puts 25 Nm of torque and a Simu Hz radio receiver inside the tube, with no receiver box on the wall and no control wiring to run. The fitment question that decides this spec is tube diameter. Somfy publishes a minimum inside diameter of 1.85 in for the T5 50 mm class, and a tube that measures under that will not take the drive.
Tube diameter sets the fit
Measure the inside of the tube, not the outside. A 2 in round tube with a thick wall can fall below 1.85 in on the inside, and the drive wheel then binds against the seam. The motor body runs 1.77 in across with a 1.97 in head, so the head sits proud of the tube and lands in the bracket.
Somfy builds crowns and drives for this class across the common profiles: 60 mm round, 60 mm octagonal, 70 mm octagonal, 85 mm Simbac round, and the LT50 2 in and 2.5 in clip sets. Pick the crown and drive as a matched pair for the profile you have. A 60 mm octagonal drive in a 70 mm octagonal tube will spin inside the tube and chew the seam.
Shades and shutters that suit 25 Nm
At 25 Nm and 18 rpm, this motor sits in the middle of the Simu T5Hz range. Somfy lists it for awnings, exterior solar screens, interior window coverings and rolling shutters. The 18 rpm speed moves a mid-size exterior screen at a pace that reads as deliberate rather than slow, and it holds the same speed under the extra load of a wet awning fabric.
Dealers reach for 25 Nm when a 20 Nm motor runs out of headroom on a wide rolling shutter or a loaded zip screen. Weigh the curtain, add the tube, and leave margin for a stiff bottom bar. Somfy rates torque at the tube, so a heavy hem rail and a tight side channel both count against the number.
Verified specifications
| Specification | Figure |
|---|---|
| Reference | 2005134 |
| Torque and speed | 25 Nm at 18 rpm |
| Power supply | 120V AC, 60 Hz |
| Rated current | 1.6 A |
| Consumption in operation | 180 W |
| Consumption in standby | 0.38 W |
| Radio | Simu Hz, 433.420 MHz |
| Range in open field | 492.15 ft |
| Limit switches | Electronic, 54 turns |
| Head type | Round with pins |
| Motor diameter | 1.77 in, head 1.97 in |
| Minimum tube inside diameter | 1.85 in |
| Cable | 3-wire, white |
| Protection | IP 44, Class I insulation |
| Operating temperature | -4°F to 140°F |
| Noise level | 56 dB |
| Packaged length | 27.28 in |
| Warranty | 5 years |
Figures come from Somfy's published data for reference 2005134 on somfysystems.com and from the Simu T5Hz installation guide.
Brackets, crowns and drives that fit
The round pin head drops into the Simu T5 Operator Bracket 80mm x 80mm Square (9520049), which gives a square plate for a face mount or a soffit mount inside a hood. Somfy also builds the T5 bracket in 100 x 100 mm, 48 mm and pin mount forms, so a retrofit into an existing hood keeps the same head.
On the drive side, match the tube. The T5/T6 60mm Round Aluminum Drive (9012950) covers 60 mm round tube, and the T5/T6 70mm Octagonal Aluminum Drive (9011878) covers the 70 mm octagonal profile common on rolling shutters. Add a Drive Stop and Screw (9910004) to lock the drive to the tube and stop the slow creep that shows up as a drifting limit after a season of cycles.
Keep the parts in the 50 mm class. A 40 mm crown will not seat on this drive, and an LS40 adapter has no place on a T5 head.
Hz radio, limits and install notes
The receiver lives in the motor head, so a Simu Hz transmitter talks to the motor without a wall box or a receiver module. Somfy publishes 492.15 ft of range in open field on 433.420 MHz. Plan for less through a masonry wall or a metal hood, and keep the antenna lead clear of the tube and of any aluminum fascia.
Limits are electronic with a 54-turn capacity, which covers the drop on tall shutters and wide awnings without a mechanical adjuster. Set the limits from the transmitter during commissioning, then check them under load with the curtain in place. A fabric that stretches in the first week shifts the bottom stop, and a second pass on the lower limit settles it.
Standby draw sits at 0.38 W, so a bank of these motors adds little to a panel load. Operating draw of 180 W at 1.6 A tells you how many motors share a 15 A circuit before the breaker becomes the limit.
A few practical points come up on this reference. Wire the 3-wire white cable to a fused supply and keep the earth connected, since the motor carries Class I insulation and relies on it. IP 44 covers splash and weather inside a hood or a cassette, and it does not cover a motor hanging in driven rain, so dress the cable so water runs away from the head.
Give the motor a rest between long runs. Simu builds thermal protection into the T5 range, and a run of repeated full cycles on a wide shutter will trip it before any damage follows. The protection resets on its own once the winding cools.
Pack length matters for a retrofit. The motor ships at 27.28 in, which sets the shortest tube this reference will go into once you add the bracket and the idle end.
The 25 Nm step in the T5Hz range
Somfy builds the T5Hz line from 10 Nm up to 50 Nm. The 25 Nm reference 2005134 covers the span where a wide interior shade or a mid-size rolling shutter needs more than a 20 Nm head but does not call for 35 Nm. Order it with the bracket and the crown and drive set for your tube, and the install turns into a single pass with no receiver to mount.
View the Simu T5Hz 25Nm 18rpm 120V (2005134) product page for current pricing and stock.
Frequently asked questions
Will the T5Hz 25Nm fit a 2 in tube?
Measure the inside diameter first. Somfy publishes a minimum inside diameter of 1.85 in for this motor, and a 2 in tube with a thin wall clears it. A thick-wall 2 in tube can fall under 1.85 in, and the drive will bind. Use the LT50 2 in clip drive on tube that measures within range.
How far does the Hz radio reach?
Somfy publishes 492.15 ft in open field on 433.420 MHz. Range drops inside a building, and masonry, foil-backed insulation and metal fascia all cut it. Mount the motor with the antenna lead clear of the tube, and test the transmitter from the furthest point a user will stand before closing the hood.
Does the T5Hz need a separate receiver?
No. The Hz receiver sits in the motor head, so a Simu Hz transmitter pairs straight to the motor. The install needs power and an earth, with no receiver box, no control conductors and no wall plate wiring. That saves a run of low-voltage cable on a retrofit.
What torque does 25 Nm handle on a rolling shutter?
Torque at the tube depends on the curtain weight, the tube diameter and the friction in the side channels. A 25 Nm motor on a 60 mm tube suits a mid-size aluminum shutter or a loaded zip screen. Weigh the curtain, add the bottom bar, and keep margin so the motor runs below its rated figure.
Shade Motors Direct is an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.
