
Rack actuator with 500N thrust in three stroke lengths: 320, 500 and 750mm. For top-hung and bottom-hung windows, domes and skylights. 230V and 24V.
- 500N / 50kg
- 320 / 500 / 750mm
- 230V / 24V
- Silver
- Sync option: No
TOPP Window Actuators, Trade Supplied Since 1996
TOPP was founded in 1996 in Sandrigo, near Vicenza in northern Italy, and is part of the 2 Plus 3 Holding group. The company builds automation for windows and doors and sells into more than 60 countries, and is a member of the Italian trade bodies UNAC and ANIMA Confindustria. Vent-Trade has supplied TOPP window actuators since the same year, 1996.
TOPP’s window actuator range covers chain drives, including the C20, C30, C40, C50 and C60, and the dual push-point C240 and C260 for larger windows, plus a linear stem actuator (S80), a rack actuator (T50) and a swing-opening actuator (A90). Thrust runs from around 300N up to 800N depending on model, with strokes from roughly 360mm to 1000mm. TOPP also builds ToppGO, a Bluetooth app for setting actuator parameters from a phone or tablet rather than physical dip switches.
Smoke and heat exhaust ventilation (SHEV) variants of the C50, ACK4, C160, S80 and A90 are verified to EN 12101-2. TOPP tests every unit individually before it leaves the factory, and the company holds more than 50 international patents across its actuator and building-automation designs.
Every TOPP actuator is tested individually before it leaves the factory, backed by design work across more than 50 patents. In practice that shows up as fewer callbacks on site. TOPP is also the only brand in our range with app-based setup: ToppGO configures stroke and force from a phone, no dip switches involved. Call 01202 725 689 or browse the range below.

Rack actuator with 500N thrust in three stroke lengths: 320, 500 and 750mm. For top-hung and bottom-hung windows, domes and skylights. 230V and 24V.

Versatile chain actuator with 300N thrust and adjustable stroke up to 400mm. For top-hung, bottom-hung windows, domes and skylights. 230V and 24V.

Compact chain actuator with 300N thrust and adjustable stroke 240-360mm. For top-hung and bottom-hung windows, domes and skylights. 230V and 24V.

Dual push-point chain actuator with 400N thrust and 360mm stroke. Compact profile for top-hung and bottom-hung windows. 230V and 24V.

Compact chain actuator with 300N thrust and adjustable stroke up to 380mm. For top-hung, bottom-hung and centre-pivot windows. 230V and 24V.

Compact chain actuator with 400N thrust and adjustable stroke up to 500mm. For top-hung and bottom-hung windows, domes and skylights. 230V and 24V.

Linear stem actuator with 800N thrust and stroke from 200-1000mm. For top-hung and bottom-hung windows and louvres. 24V DC.
TOPP was founded in 1996 in Sandrigo, near Vicenza in northern Italy, and is part of the 2 Plus 3 Holding group. It sells into more than 60 countries.
TOPP produces smoke and heat exhaust ventilation (SHEV) versions of its C50, ACK4, C160, S80 and A90 actuators, verified to EN 12101-2.
Vent-Trade has stocked and supplied TOPP actuators to UK trade customers since 1996.