What supply voltage and frequency does each use?

Rated voltage — Somfy 550R2 RTS CMO: 120 V; Somfy 550R2 50/14 SJTW: 120 V. Mains frequency — Somfy 550R2 RTS CMO: 60 Hz; Somfy 550R2 50/14 SJTW: 60 Hz. Power supply type — Somfy 550R2 RTS CMO: AC mains; Somfy 550R2 50/14 SJTW: AC mains.

What torque and speed is each rated for?

Rated torque — Somfy 550R2 RTS CMO: 50 Nm; Somfy 550R2 50/14 SJTW: 50 Nm. Rated speed — Somfy 550R2 RTS CMO: 14 rpm; Somfy 550R2 50/14 SJTW: 14 rpm.

What certifications are on record for each?

Marks stated by vendor — Somfy 550R2 RTS CMO: UL.

Which durability indicators does each publish?

OpenAxia does not rate reliability; the published indicators are: Short-time duty (S2) — Somfy 550R2 50/14 SJTW: 5 min. IP rating — Somfy 550R2 RTS CMO: IP44; Somfy 550R2 50/14 SJTW: IP44.

Somfy 550R2: RTS CMO vs 50/14 SJTW Compared

Cable length — Somfy 550R2 RTS CMO: 1.8 m^{[1; 2026-10-07]}; Somfy 550R2 50/14 SJTW: 2 m^{[2; 2026-10-07]}.

Operating temp. (max) — Somfy 550R2 RTS CMO: 40 °C^{[1; 2026-10-07]}; Somfy 550R2 50/14 SJTW: 60 °C^{[2; 2026-10-07]}.

Last verified: 2026-10-07

When to choose Somfy 550R2 RTS CMO

For 120 V^{[1; 2026-10-07]} / 60 Hz^{[1; 2026-10-07]} mains.
For the stated supply type: AC mains^{[1; 2026-10-07]}.
For a rated torque of 50 Nm^{[1; 2026-10-07]}.
For a rated speed of 14 rpm^{[1; 2026-10-07]}.

When to choose Somfy 550R2 50/14 SJTW

For 120 V^{[2; 2026-10-07]} / 60 Hz^{[2; 2026-10-07]} mains.
For the stated supply type: AC mains^{[2; 2026-10-07]}.
For a rated torque of 50 Nm^{[2; 2026-10-07]}.
For a rated speed of 14 rpm^{[2; 2026-10-07]}.

Verifiable indicators

Short-time duty (S2) — Somfy 550R2 50/14 SJTW: 5 min^{[2; 2026-10-07]}. Somfy 550R2 RTS CMO: Not published.

Rated life — Somfy 550R2 RTS CMO: Not published. Somfy 550R2 50/14 SJTW: Not published.

Thermal protection — Somfy 550R2 RTS CMO: Not published. Somfy 550R2 50/14 SJTW: Not published.

IP rating — Somfy 550R2 RTS CMO: IP44^{[1; 2026-10-07]}; Somfy 550R2 50/14 SJTW: IP44^{[2; 2026-10-07]}.

Comparison table
Property	Somfy 550R2 RTS CMOSomfy1051466	Somfy 550R2 50/14 SJTWSomfy1051464
Series & variant axes
Series	LT50	LT50
Control protocol	RTS (from model name)	—
Power supply	AC mains	AC mains
Torque	50 Nm	50 Nm
Electrical
Rated voltage	120 V^{[1; 2026-10-07]}	120 V^{[2; 2026-10-07]}
Mains frequency	60 Hz^{[1; 2026-10-07]}	60 Hz^{[2; 2026-10-07]}
Power supply type	AC mains^{[1; 2026-10-07]}	AC mains^{[2; 2026-10-07]}
Rated power input	250 W^{[3; 2026-09-30]}	250 W^{[3; 2026-09-30]}
Standby power	0 W^{[3; 2026-10-01]}	0 W^{[3; 2026-10-01]}
Rated current	2.1 A^{[1; 2026-10-07]}	2.1 A^{[2; 2026-10-07]}
Cable lengthDiffers: 1.8 m^{[1; 2026-10-07]} vs 2 m^{[2; 2026-10-07]}	1.8 m^{[1; 2026-10-07]}	2 m^{[2; 2026-10-07]}
Drive performance
Rated torque	50 Nm^{[1; 2026-10-07]}	50 Nm^{[2; 2026-10-07]}
Rated speed	14 rpm^{[1; 2026-10-07]}	14 rpm^{[2; 2026-10-07]}
Short-time duty (S2)	Not published	5 min^{[2; 2026-10-07]}
Limits & protection
Limit setting	Electronic^{[1; 2026-10-07]}	Not published
Limit range	34 turns^{[1; 2026-10-07]}	Not published
Control & communication
Control protocol	RTS^{[3; 2026-09-30]}	Not published
Radio frequency	433.42 MHz^{[3; 2026-10-01]}	Not published
Radio range	200 m^{[3; 2026-10-01]}	Not published
Max paired transmitters	12 pcs^{[3; 2026-10-01]}	Not published
Environment & protection
IP rating	IP44^{[1; 2026-10-07]}	IP44^{[2; 2026-10-07]}
Operating temp. (min)	-10 °C^{[1; 2026-10-07]}	-10 °C^{[2; 2026-10-07]}
Operating temp. (max)Differs: 40 °C^{[1; 2026-10-07]} vs 60 °C^{[2; 2026-10-07]}	40 °C^{[1; 2026-10-07]}	60 °C^{[2; 2026-10-07]}Highest stated
Compliance & declarations
Marks stated by vendor	UL^{[3; 2026-10-01]}	Not published
View all 24 variants
Documents	Official datasheet ↗	Official datasheet ↗

— means no value: the manufacturer does not publish it, it does not apply to this product type, or there is none on record. Value states

Questions and answers

What supply voltage and frequency does each use?: Rated voltage — Somfy 550R2 RTS CMO: 120 V; Somfy 550R2 50/14 SJTW: 120 V. Mains frequency — Somfy 550R2 RTS CMO: 60 Hz; Somfy 550R2 50/14 SJTW: 60 Hz. Power supply type — Somfy 550R2 RTS CMO: AC mains; Somfy 550R2 50/14 SJTW: AC mains.
What torque and speed is each rated for?: Rated torque — Somfy 550R2 RTS CMO: 50 Nm; Somfy 550R2 50/14 SJTW: 50 Nm. Rated speed — Somfy 550R2 RTS CMO: 14 rpm; Somfy 550R2 50/14 SJTW: 14 rpm.
What certifications are on record for each?: Marks stated by vendor — Somfy 550R2 RTS CMO: UL.
Which durability indicators does each publish?: OpenAxia does not rate reliability; the published indicators are: Short-time duty (S2) — Somfy 550R2 50/14 SJTW: 5 min. IP rating — Somfy 550R2 RTS CMO: IP44; Somfy 550R2 50/14 SJTW: IP44.

Sources

↑Somfy PDF catalogueservice.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1051012] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51209, 51211, 51210, 51219, 51217, 51218, 51220, 51215, 51216, 51214, 51212, 51213
↑Somfy PDF catalogue lt50ra-d0025service.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1051019] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51162, 51164, 51163, 51170, 51168, 51169, 51171, 51172, 51165, 51166, 51167
↑Somfy Systems (North America) manufacturer site (product catalog)somfysystems.comRated power input: Consumption during operation 250 WManufacturer-stated · Observed 2026-09-30 · Retrieved 2026-09-30 · Public web pageUsed for: 3880, 4067, 10263, 10365, 3882, 10260, 10262, 10261, 10264

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Somfy 550R2 RTS CMO vs Somfy 550R2 50/14 SJTW

When to choose Somfy 550R2 RTS CMO

When to choose Somfy 550R2 50/14 SJTW

Verifiable indicators

Questions and answers

Sources