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Last verified: 2026-10-09

Verifiable indicators

Short-time duty (S2) — Wistar motor WSS50 · 50 Nm · 16 rpm: 4 min^{[1; 2026-10-02]}; Somfy 550R2 50/14 SJTW: 5 min^{[2; 2026-10-07]}. Elero RolTop M · 50 Nm · 14 rpm: Not published. Elero RolTop M-868 · 50 Nm · 14 rpm: Not published.

Rated life — Wistar motor WSS50 · 50 Nm · 16 rpm: Not published. Elero RolTop M · 50 Nm · 14 rpm: Not published. Elero RolTop M-868 · 50 Nm · 14 rpm: Not published. Somfy 550R2 50/14 SJTW: Not published.

Thermal protection — Wistar motor WSS50 · 50 Nm · 16 rpm: Not published. Elero RolTop M · 50 Nm · 14 rpm: Not published. Elero RolTop M-868 · 50 Nm · 14 rpm: Not published. Somfy 550R2 50/14 SJTW: Not published.

IP rating — Somfy 550R2 50/14 SJTW: IP44^{[2; 2026-10-07]}. Wistar motor WSS50 · 50 Nm · 16 rpm: Not published. Elero RolTop M · 50 Nm · 14 rpm: Not published. Elero RolTop M-868 · 50 Nm · 14 rpm: Not published.

Comparison table
Property	Wistar motor WSS50 · 50 Nm · 16 rpmWistar motorWSS50-50/16	Elero RolTop M · 50 Nm · 14 rpmElero34 261.0001	Elero RolTop M-868 · 50 Nm · 14 rpmElero34 262.0006	Somfy 550R2 50/14 SJTWSomfy1051464
Series & variant axes
SeriesDiffers: WSS50 vs RolTop M vs RolTop M-868 vs LT50	WSS50	RolTop M	RolTop M-868	LT50
Identity & lineage
Series / product line	WSS50^{[1; 2026-10-02]}	Not published	Not published	Not published
Electrical
Rated voltage	120 V^{[1; 2026-10-02]}	Not published	Not published	120 V^{[2; 2026-10-07]}
Mains frequency	60 Hz^{[1; 2026-10-02]}	Not published	Not published	60 Hz^{[2; 2026-10-07]}
Power supply type	AC mains^{[1; 2026-10-02]}	Not published	Not published	AC mains^{[2; 2026-10-07]}
Rated power inputDiffers: 280 W^{[1; 2026-10-02]} vs Not published vs Not published vs 250 W^{[3; 2026-09-30]}	280 W^{[1; 2026-10-02]}	Not published	Not published	250 W^{[3; 2026-09-30]}
Standby power	Not published	Not published	Not published	0 W^{[3; 2026-10-01]}
Rated currentDiffers: 2.4 A^{[1; 2026-10-02]} vs Not published vs Not published vs 2.1 A^{[2; 2026-10-07]}	2.4 A^{[1; 2026-10-02]}	Not published	Not published	2.1 A^{[2; 2026-10-07]}
Cable length	Not published	Not published	Not published	2 m^{[2; 2026-10-07]}
Drive performance
Rated torque	50 Nm^{[1; 2026-10-02]}	50 Nm^{[4; 2026-10-02]}	50 Nm^{[4; 2026-09-23]}	50 Nm^{[2; 2026-10-07]}
Rated speedDiffers: 16 rpm^{[1; 2026-10-02]} vs 14 rpm^{[4; 2026-10-02]} vs 14 rpm^{[4; 2026-09-23]} vs 14 rpm^{[2; 2026-10-07]}	16 rpm^{[1; 2026-10-02]}	14 rpm^{[4; 2026-10-02]}	14 rpm^{[4; 2026-09-23]}	14 rpm^{[2; 2026-10-07]}
Short-time duty (S2)Differs: 4 min^{[1; 2026-10-02]} vs Not published vs Not published vs 5 min^{[2; 2026-10-07]}	4 min^{[1; 2026-10-02]}	Not published	Not published	5 min^{[2; 2026-10-07]}Highest stated
Dimensions & mounting
Motor diameter	45 mm^{[1; 2026-10-02]}	45 mm^{[5; 2026-10-09]}	45 mm^{[5; 2026-10-09]}	Not published
Fits tube diameter	Not published	≥ 50 mm^{[4; 2026-10-02]}	≥ 50 mm^{[4; 2026-10-01]}	Not published
Weight	2.6 kg^{[1; 2026-10-02]}	Not published	Not published	Not published
Limits & protection
Limit settingDiffers: Mechanical^{[1; 2026-10-02]} vs Electronic^{[4; 2026-10-02]} vs Electronic^{[4; 2026-10-01]} vs Not published	Mechanical^{[1; 2026-10-02]}	Electronic^{[4; 2026-10-02]}	Electronic^{[4; 2026-10-01]}	Not published
Control & communication
Control protocol	Not published	Not published	Proprietary RF^{[4; 2026-10-01]}	Not published
Control interface (as stated)	Not published	Hardwired^{[4; 2026-10-02]}	Radio^{[4; 2026-10-01]}	Not published
Radio frequency	Not published	Not published	868 MHz^{[6; 2026-09-23]}	Not published
Environment & protection
IP rating	Not published	Not published	Not published	IP44^{[2; 2026-10-07]}
Operating temp. (min)	Not published	Not published	Not published	-10 °C^{[2; 2026-10-07]}
Operating temp. (max)	Not published	Not published	Not published	60 °C^{[2; 2026-10-07]}
Application
Applications	Not published	Roller shutter^{[4; 2026-10-02]}	Roller shutter^{[4; 2026-10-01]}	Not published
Documents	Request datasheet	Request datasheet	Request datasheet	Official datasheet ↗

Data gaps

Wistar motor WSS50 · 50 Nm · 16 rpm: Overall length — Not yet collected
Wistar motor WSS50 · 50 Nm · 16 rpm: Limit range — Not yet collected

Sources

↑Wistar motor manufacturer site (product catalog)wistarmotor.comSeries / product line: Ref: WSS50Manufacturer-stated · Observed 2026-10-02 · Retrieved 2026-10-01 · Public web pageUsed for: 45467, 45462, 45466, 45458, 45461, 45463, 45456, 45457, 45464, 45459, 45465, 45468
↑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: 4067, 10365
↑Elero manufacturer site (product catalog)elero.comRated torque: 50 NmManufacturer-stated · Observed 2026-10-02 · Retrieved 2026-09-23 · Public web pageUsed for: 44522, 1959, 44523, 1960, 44524, 27267, 44525, 27266, 27268, 44526, 27264, 44527, 27265
↑Tubular diameter derivation tdia-elero-catalog-2026-p51-roltop-melero.com[tdia-elero-catalog-2026-p51-roltop-m] Ø 45 mm from "RolTop M". archive: vendor/elero/aero/catalog_pdf/d3db2f5a3087a18e41569789454c321eaa3e24c3927400842437f18ecca3c54a.pdf p51. elero catalogue 2026 p51, Technical data RolTop M-868 /-K / RolTop M /-K / RolTop M-868 / RolTop M high-speed version / RolTop/D+ M-868 / RolTop/D+ M / RolTop/D+ M NHK / RolTop s_onro M-868 / RolTop s_onro M / RolTop/J M-868 / RolTop/J M: "Min. shaft diameter (mm) 50 … Diameter (mm) 45"Derived (vendor document) · Observed 2026-10-09 · Retrieved 2026-10-09 · Public web pageUsed for: 54635, 54626
↑Elero manufacturer site (product catalog)elero.commodel: RolTop M-868 RolTop M50-868Derived · Observed 2026-09-23 · Retrieved 2026-09-23 · Public web pageUsed for: 7408

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Verifiable indicators

Data gaps

Sources