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Last verified: 2026-10-09

Verifiable indicators

Short-time duty (S2) — Wistar motor WSS50 · 20 Nm · 16 rpm: 4 min^{[1; 2026-10-02]}; Somfy 520R2 20/14 SJTW: 5 min^{[2; 2026-10-07]}. Elero RolMotion M · 20 Nm · 14 rpm: Not published. Elero RolMotion M-868 · 20 Nm · 14 rpm: Not published.

Rated life — Wistar motor WSS50 · 20 Nm · 16 rpm: Not published. Elero RolMotion M · 20 Nm · 14 rpm: Not published. Elero RolMotion M-868 · 20 Nm · 14 rpm: Not published. Somfy 520R2 20/14 SJTW: Not published.

Thermal protection — Wistar motor WSS50 · 20 Nm · 16 rpm: Not published. Elero RolMotion M · 20 Nm · 14 rpm: Not published. Elero RolMotion M-868 · 20 Nm · 14 rpm: Not published. Somfy 520R2 20/14 SJTW: Not published.

IP rating — Somfy 520R2 20/14 SJTW: IP44^{[2; 2026-10-07]}. Wistar motor WSS50 · 20 Nm · 16 rpm: Not published. Elero RolMotion M · 20 Nm · 14 rpm: Not published. Elero RolMotion M-868 · 20 Nm · 14 rpm: Not published.

Comparison table
Property	Wistar motor WSS50 · 20 Nm · 16 rpmWistar motorWSS50-20/16	Elero RolMotion M · 20 Nm · 14 rpmElero44 231.0001	Elero RolMotion M-868 · 20 Nm · 14 rpmElero44 232.0001	Somfy 520R2 20/14 SJTWSomfy1042055
Series & variant axes
SeriesDiffers: WSS50 vs RolMotion M vs RolMotion M-868 vs LT50	WSS50	RolMotion M	RolMotion 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: 150 W^{[1; 2026-10-02]} vs Not published vs Not published vs 130 W^{[3; 2026-09-30]}	150 W^{[1; 2026-10-02]}	Not published	Not published	130 W^{[3; 2026-09-30]}
Standby power	Not published	Not published	Not published	0 W^{[3; 2026-10-01]}
Rated currentDiffers: 1.26 A^{[1; 2026-10-02]} vs Not published vs Not published vs 1.1 A^{[2; 2026-10-07]}	1.26 A^{[1; 2026-10-02]}	Not published	Not published	1.1 A^{[2; 2026-10-07]}
Cable length	Not published	Not published	Not published	2 m^{[2; 2026-10-07]}
Drive performance
Rated torque	20 Nm^{[1; 2026-10-02]}	20 Nm^{[4; 2026-10-02]}	20 Nm^{[4; 2026-09-23]}	20 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]}
Speed range (min)	Not published	5 rpm^{[4; 2026-10-02]}	5 rpm^{[4; 2026-10-01]}	Not published
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	2.3 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]}
Noise level	Not published	Not published	Not published	48 dB(A)^{[3; 2026-09-30]}
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 · 20 Nm · 16 rpm: Overall length — Not yet collected
Wistar motor WSS50 · 20 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: 45415, 45410, 45414, 45406, 45409, 45411, 45404, 45405, 45412, 45407, 45413, 45416
↑Somfy PDF catalogue lt50ra-d0025service.somfy.comRated voltage: Voltage Supply: 120V AC, 60Hz [1041026] (p. 1)Manufacturer-stated · Observed 2026-10-07 · Retrieved 2026-10-06 · Public web pageUsed for: 51151, 51153, 51152, 51159, 51157, 51158, 51160, 51161, 51154, 51155, 51156
↑Somfy Systems (North America) manufacturer site (product catalog)somfysystems.comRated power input: Consumption during operation 130 WManufacturer-stated · Observed 2026-09-30 · Retrieved 2026-09-30 · Public web pageUsed for: 4247, 10458, 4245
↑Elero manufacturer site (product catalog)elero.comRated torque: 20 NmManufacturer-stated · Observed 2026-10-02 · Retrieved 2026-09-23 · Public web pageUsed for: 44289, 1615, 44290, 1616, 44291, 26049, 44292, 26047, 44293, 26046, 26048, 44294, 26044, 44295, 26045
↑Tubular diameter derivation tdia-elero-catalog-2026-p45-rolmotion-melero.com[tdia-elero-catalog-2026-p45-rolmotion-m] Ø 45 mm from "RolMotion M". archive: vendor/elero/aero/catalog_pdf/d3db2f5a3087a18e41569789454c321eaa3e24c3927400842437f18ecca3c54a.pdf p45. elero catalogue 2026 p45, Technical data RolMotion M-868 / RolMotion M / RolMotion/D+ M-868 / RolMotion/D+ M: "Min. shaft diameter (mm) 50 … Diameter (mm) 45"Derived (vendor document) · Observed 2026-10-09 · Retrieved 2026-10-09 · Public web pageUsed for: 54551, 54543
↑Elero manufacturer site (product catalog)elero.commodel: RolMotion M-868 RolMotion M20-868Derived · Observed 2026-09-23 · Retrieved 2026-09-23 · Public web pageUsed for: 7312

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Verifiable indicators

Data gaps

Sources