CBU-PWM4-LR is a Bluetooth-controllable, four-channel PWM dimmer for constant voltage LED loads, such as LED strips and constant voltage LED modules. It is connected between a 12-24 VDC power supply and the constant voltage LED load. 

CBU-PWM4-LR can control up to four channels making it an ideal partner for RGBW and tunable white (TW) applications. The maximum combined output current is 6 A, which can be freely divided between all output channels. CBU-PWM4-LR is protected against overvoltage, overcurrent and short-circuit situations. 

CBU-PWM4-LR can be controlled with the Casambi App, available for iOS and Android devices, as well as with traditional wall switches. The Casambi App can be downloaded free of charge from the Apple App Store and Google Play Store. 

Different Casambi-enabled products can be used from a simple one-luminaire direct control setup to a complete and full-featured lighting control system, in which up to 250 units automatically form an intelligent mesh network. 

Wireless Control

CBU-PWM4-4-LR can be controlled with the Casambi app, available for iOS and Android devices. The Casambi app can be downloaded free of charge from Apple App Store and Google Play Store.

Operating conditions 

  • Ambient temperature: ta : -20 to +45°C 
  • Max. case temperature, tc : +75°C 
  • Storage temperature: -25…+75°C 
  • Max. relative humidity: 0…80%, 
  • non-condensing 
  • Location of tc point: The tc point is marked on the enclosure. 


  • Wire range, solid & stranded: 0,75–1,5 mm2 
  • 14–22 AWG 
  • Wire strip length: 6-7 mm 
  • Screw torque force: 0,4 Nm 
  • Input/output cable length: 3,0 m (Max.) 

Mechanical data 

  • Dimensions: 72,6 x 30,0 x 18,0 mm 
  • Weight: 23 g 
  • Degree of protection: IP20 (indoor use only) 


  • CE 
  • AU/NZ 


  • Voltage: 12–24 VDC, Class II 
  • Max. input current: 6,0 A 
  • No-load standby power: < 0,3 W 


  • Output voltage: 12–24 VDC 
  • Max. output power: 144 W @ 24 VDC 
  • 72 W @ 12 VDC 
  • Max. output current: 6,0 A (can be freely divided between the channels) 
  • Min. load requirement: 0 W 
  • Dimming method: Pulse Width Modulation 
  • (PWM, freq. 400 Hz) 

Radio transceiver 

  • Operating frequencies: 2402…2480 MHz 
  • Maximum output power: +8 dBm 

Download CBU-PWM4 datasheet (English)

Declaration of Conformity
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