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LTECH SE-20-250-1000-W2D2 20W 250mA ~ 1000mA CC DALI2 LED Driver - Tunable White

SKU SE-20-250-1000-W2D2

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Overview

SE-20-250-1000-W2D2 is the 9-54Vdc output model of this series: typical efficiency 83%.

Features

Dimming interface: DALI DT8, Push DIM
T-PWM™digital dimming.
Dimming range: 0~100%, LED start at 0.01% possible.
DALI DT8 CT adjustment driver.
0-100% flicker-free (IEEE 1789 standard).
Innovative thermal management technology, intelligent power life protection.
Over temp. / Over voltage / Over load / Short circuit protection, recover automatically.
In line with the EU energy efficiency ERP directive, standby power consumption < 0.5W.
DALI bus standard: IEC62386-101,102, 209.
Suitable for internal lights application for Ⅰ/Ⅱ/Ⅲ.
5 years warranty (Rubycon capacitor).

Specifications

SE-20-250-1000-W2D2Specifications from the official datasheetDownload datasheet PDF

Main characteristics

Dimming interface: DALI, Push DIM
Input voltage: 100-240Vac (120-300Vdc)
Frequency: 50/60Hz
Input current: 115Vac≤0.25A, 230Vac≤0.13A
Output current: 250-1000mA
Output power: Max. 20W
Power factor: PF>0.95/115Vac , PF>0.90/230Vac, at full load
THD: 230Vac@THD≤9%, at full load
Efficiency: 83%
Standby power loss: <0.5W
Inrush current(typ.): 10A (230Vac, cold start, twidth=40μs at 50% Ipeak)
Anti surge: L-N: 2kV
Leakage current: <0.24mA/230Vac
Output voltage: 9-54Vdc
Max output voltage: 59Vdc
Strobe level: Almost flicker-free / High frequency exemption assessment level
Dimming range: 0~100%, 0.01% dimming depth
LF current ripple(<120Hz): <2%
Current accuracy: ±5%
Ripple & Noise: ≤2V
PWM dimming frequency: ≤3600Hz
Working temperature: ta: -20 ~ 50°C, tc: 75°C
Working humidity: 20 ~ 95%RH, non-condensing
Storage temp., humidity: -40 ~ 80°C, 10~95%RH
Temp. coefficient: ±0.03%/°C(0-50°C)
Vibration: 10~500Hz, 2G, 12min./cycle, 72min. each along X, Y, Z axes

LED Current Selection

DIP switch: ON ON ON ON
Output current: 250mA
Output voltage: 9-54V
Output power: 2.25-13.5W
DIP switch: ON ON ON OFF
Output current: 300mA
Output voltage: 9-54V
Output power: 2.7-16.2W
DIP switch: ON ON OFF ON
Output current: 350mA
Output voltage: 9-54V
Output power: 3.15-18.9W
DIP switch: ON ON OFF OFF
Output current: 400mA
Output voltage: 9-50V
Output power: 3.6-20W
DIP switch: ON OFF ON ON
Output current: 450mA
Output voltage: 9-45V
Output power: 4.05-20.25W
DIP switch: ON OFF ON OFF
Output current: 500mA
Output voltage: 9-40V
Output power: 4.5-20W
DIP switch: ON OFF OFF ON
Output current: 550mA
Output voltage: 9-37V
Output power: 4.95-20.35W
DIP switch: ON OFF OFF OFF
Output current: 600mA
Output voltage: 9-34V
Output power: 5.4-20.4W
DIP switch: OFF ON ON ON
Output current: 650mA
Output voltage: 9-31V
Output power: 5.85-20.15W
DIP switch: OFF ON ON OFF
Output current: 700mA
Output voltage: 9-29V
Output power: 6.3-20.3W
DIP switch: OFF ON OFF ON
Output current: 750mA
Output voltage: 9-27V
Output power: 6.75-20.25W
DIP switch: OFF ON OFF OFF
Output current: 800mA
Output voltage: 9-25V
Output power: 7.2-20W
DIP switch: OFF OFF ON ON
Output current: 850mA
Output voltage: 9-24V
Output power: 7.65-20.4W
DIP switch: OFF OFF ON OFF
Output current: 900mA
Output voltage: 9-22V
Output power: 8.1-19.8W
DIP switch: OFF OFF OFF ON
Output current: 950mA
Output voltage: 9-21V
Output power: 8.55-19.95W
DIP switch: OFF OFF OFF OFF
Output current: 1000mA
Output voltage: 9-20V
Output power: 9-20W

Protection

Over temp. protection: Intelligently adjusting or turning off output current if PCB temperature ≥110°C, auto recovers
Over load protection: Shut down output when current load≥102%, auto recovers
Short circuit protection: Shut down automatically if short circuit occurs, auto recovers
Over voltage protection: Output current declined when over non-load voltage, auto recovers

Safety & EMC

Withstand voltage: I/P-O/P: 3750Vac
Isolation resistance: I/P-O/P: 100MΩ/500VDC/25°C/70%RH
Safety standards: IEC/EN61347-1, IEC/EN61347-2-13
EMC emission: EN55015, EN61000-3-2 Class C, IEC61000-3-3
EMC immunity: EN61000-4-2,3,4,5,6,8,11, EN61547
Strobe test standard: IEEE 1789

Others

Dimension: 167×41×32mm(L×W×H)
Packing: 168×43×35mm(L×W×H)
Weight(G.W.): 160g±10g

Certifications & ratings

Marked features: Flicker-free IEEE 1789

Technical drawings

SE-20-250-1000-W2D2 DALI DT8 connection — DALI DT8 connection

SE-20-250-1000-W2D2 Push DIM/CCT — Push DIM/CCT

SE-20-250-1000-W2D2 Dimensions — Dimensions

SE-20-250-1000-W2D2 Relationship diagrams — Relationship diagrams

Downloads

Datasheet1

SE-20-250-1000-W2D2 datasheetSE_20_250_1000_W2D2spec.pdf PDF Download

Catalogues1

Ltech Catalog PDF Download

FAQ

What type of LED applications is the LTECH SE-20-250-1000-W2D2 designed for?

This model is intended for constant current LED lighting applications that need tunable white control. Its DALI DT8 colour temperature adjustment capability makes it relevant for projects where white tone needs to shift within the lighting design. It is a 20W driver, so it suits lower-power fixtures that match its output range.

What are the key output specifications of the SE-20-250-1000-W2D2?

This LED driver is rated at 20W with a maximum output voltage of 59V. It supports an adjustable constant current range from 250mA to 1000mA. These specifications make it a constant current driver rather than a constant voltage power supply.

Does this LED driver support DALI tunable white control?

Yes. The product supports DALI DT8 and is a tunable white driver with CT adjustment. It also supports Push DIM and T-PWM digital dimming, giving it broader control compatibility within supported lighting systems.

How smooth is the dimming performance on this model?

The SE-20-250-1000-W2D2 is specified for 0 to 100% dimming with 0.01% dimming depth and is described as flicker-free. That makes it a strong fit where fine dimming control matters.

What protections and reliability features are included in this driver?

This model includes short circuit, overload, overvoltage, and over-temperature protection with automatic recovery. The listed warranty period is 5 years.

Is the SE-20-250-1000-W2D2 suitable for demanding temperature conditions?

The operating temperature range is -20°C to 50°C (ambient) with a case temperature limit of 75°C. Buyers should compare their project environment against this stated range when selecting the driver.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Ltech SE-20-100-700-W1D 20W 100-700mA LED Driver - NFC, DALI2 Dimmable	20W	48V	100 Milliampere	IP20	View
Ltech SE-20-100-700-W2D 20W 100-700mA LED Driver - NFC, DALI2, Tunable White	20W	48V	100 Milliampere	IP20	View
Ltech SE-20-50-100-W5D 21W 9-42VDC CC DALI-2 LED Driver 0.05-0.1A	21W	42V	0.1A	IP20	View

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LTECH SE-20-250-1000-W2D2 20W 250mA ~ 1000mA CC DALI2 LED Driver - Tunable White

Overview

Features

Specifications

Main characteristics

LED Current Selection

Protection

Safety & EMC

Others

Certifications & ratings

Technical drawings

Downloads

Datasheet1

Catalogues1

FAQ

Payment & Security

Other SE-20 Models

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LTECH SE-20-250-1000-W2D2 20W 250mA ~ 1000mA CC DALI2 LED Driver - Tunable White

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