TCI 125403 DALI LED Driver – DC Mini Jolly 1-20W
The TCI 125403 DALI LED Driver is a compact, electronically controlled LED power supply designed for professional indoor lighting installations. Part of the TCI DC Mini Jolly range, this versatile driver supports both constant current and constant voltage operation, with DALI-2 digital dimming for precise lighting control.
Featuring adjustable output current from 250mA to 700mA and a maximum output power of 20W at 230V, it is suitable for compatible LED luminaires requiring controlled output and smooth dimming.
Key Features
- TCI DC Mini Jolly DALI – manufacturer code 125403
- 1-20W adjustable LED driver
- 250-700mA selectable output current using integrated DIP switches
- Constant current and constant voltage operation
- DALI-2 digital dimming control
- 0.5-100% dimming range
- 3-49V DC output voltage range, subject to selected operating mode
- Up to 87% efficiency at rated conditions
- Power factor of 0.95 at rated conditions
- SELV isolated output
- Overload, short-circuit, open-load and thermal protection
- IP20 protection for indoor use
- Suitable for Class I and Class II luminaires
- Manufactured in Italy
DALI-2 Dimming and Lighting Control
The TCI 125403 DALI LED Driver supports DALI-2 control, allowing compatible lighting systems to adjust LED output digitally.
The driver provides a dimming range of 0.5-100%, making it suitable for lighting installations requiring controlled brightness levels, including residential, hospitality and commercial environments.
Its default hybrid AM/PWM dimming method uses PWM at lower dimming levels and amplitude modulation at higher levels. An alternative full PWM mode is also available through the manufacturer’s specified configuration procedure.
Adjustable 250-700mA Output
The DC Mini Jolly driver features DIP-switch current selection, allowing installers to configure the output according to the connected LED luminaire.
Available current settings include:
- 250mA – up to 12W
- 350mA – up to 17W
- 400mA – up to 19W
- 450mA – up to 20W
- 500mA – up to 20W
- 550mA – up to 20W
- 600mA – up to 20W
- 700mA – up to 20W
These ratings refer to the manufacturer’s 230V operating window. The permitted output voltage varies according to the selected current.
The driver also supports a 24V constant voltage operating configuration, subject to the manufacturer’s stated output limitations.
Technical Specifications
| Manufacturer | TCI |
|---|---|
| Product Range | DC Mini Jolly DALI |
| Manufacturer Code | 125403 |
| EAN | 8010703377561 |
| Driver Type | Constant Current / Constant Voltage |
| Output Power | 1-20W |
| Adjustable Output Current | 250-700mA |
| Output Voltage | 3-49V DC, depending on configuration |
| Rated Input Voltage | 110-127V / 220-240V AC |
| Input Frequency | 50/60Hz |
| Dimming Protocol | DALI-2 |
| Dimming Range | 0.5-100% |
| Power Factor | 0.95 |
| Efficiency | 87% |
| Standby Power | Less than 0.5W |
| Output Isolation | SELV |
| Ingress Protection | IP20 |
| Ambient Operating Temperature | -25°C to +45°C |
| Weight | 106g |
| Country of Manufacture | Italy |
Installation and Compatibility
The compact TCI 125403 DALI LED Driver is designed for independent mounting in indoor lighting applications.
Its slim housing is suitable for installations where space is limited, while the integrated DIP switches allow the output current to be selected to match the LED load.
Before installation, confirm the LED luminaire’s required current, voltage and wattage against the manufacturer’s operating window.
A compatible DALI control system is required for digital dimming. This driver is not intended as a direct replacement for a conventional phase-cut dimmable LED driver.
Protection and Reliability
The TCI DC Mini Jolly DALI includes protection against open-load conditions, short circuits, overloads and excessive temperature.
The driver also features SELV output isolation and is suitable for compatible Class I and Class II luminaires.
Why Choose the TCI DC Mini Jolly DALI?
The TCI 125403 DALI LED Driver combines flexible output configuration, digital dimming and compact construction in a single professional lighting component.
Its adjustable current settings make it particularly useful for LED installations where different compatible luminaires require specific drive currents.
Available from Electrical4Less, an independent UK electrical wholesaler supplying professional lighting components, LED drivers and electrical installation products.
Important: Always check the LED load specifications and selected driver output before connecting. Output power and voltage limits depend on the selected current and operating conditions.
