Description
Keystone SmartCurrent Constant Current LED Driver, 20W Max Power Output, Universal 120-277V Input, Programmable Fixed Output Current 200-730mA (factory default 730mA), 10-56Vdc Output, Analog 0-10V Dimming, Integrated USB-C Port (cable included) for Field Programming
Keystone SmartCurrent 20W Programmable Constant Current LED Driver (KTLD-20-UV-SC730-56-VDIM-AF4 /USB)
The Keystone SmartCurrent KTLD-20-UV-SC730-56-VDIM-AF4 /USB is a high-performance, field-programmable constant current LED driver engineered for commercial architectural downlights, troffers, and track fixtures. Delivering up to 20 watts with a wide adjustable current range up to 730mA via Keystone’s handheld USB programming tool, this driver features universal 120–277V input, smooth continuous 0–10V dimming down to 1%, Class P thermal compliance, and a compact “AF4” metal enclosure equipped with dual-exit side and bottom knockouts.
Key Features & Performance Benefits
- Unpowered USB Programming (/USB): Set exact output current in 1mA increments across the 150–730mA range using Keystone’s SmartCurrent USB programmer tool without needing to connect AC mains line power. USB-C to USB-C Cable (included with driver).
- Wide Forward Voltage Window: Provides constant current output regulation across a versatile 10–56V DC Class 2 output range to support a wide variety of commercial COB arrays and LED modules.
- High-Precision 0–10V Dimming: Integrated 0–10V analog dimming circuitry delivers smooth, flicker-free dimming down to 1% with clean fade-to-off capability.
- Dual-Exit AF4 Metal Case: Enclosure features dedicated mounting feet and dual knockout locations, accommodating standard side wire lead connections or bottom-exit leads directly into recessed downlight junction boxes.
- Comprehensive Circuit Protection: UL 8750 Recognized, Class 2 Output, UL Class P, Type HL rated for hazardous locations, FCC Title 47 Part 15 Class B, and equipped with built-in open-circuit, short-circuit, over-voltage, and thermal overload protection.
Electrical Performance Data
| Specification | Details |
|---|---|
| Max Output Power | 20 Watts |
| Output Current Range | Programmable 150–730mA (Factory default: 730mA) |
| Output Voltage (DC) | 10–56V DC (Class 2 output) |
| Input Voltage | Universal 120–277V AC (50/60 Hz) |
| Dimming Type | 0–10V Dimming (1% Minimum) |
Frequently Asked Questions
What does "KTLD-20-UV-SC730-56-VDIM-AF4 /USB" stand for in Keystone's catalog?
"KTLD" designates Keystone Technologies LED Driver, "20" indicates the 20W max wattage rating, "UV" represents Universal Voltage (120–277V), "SC730" denotes the SmartCurrent programmable series up to 730mA, "56" specifies the 56V max DC forward voltage, "VDIM" indicates 0–10V analog dimming, "AF4" defines the compact metal housing style, and "/USB" designates the direct USB programming port method.
How is the output current configured on this driver?
Output current is programmed via the built-in USB port using Keystone’s SmartCurrent desktop configuration software and handheld USB programming tool. The driver does not require AC line voltage during programming, as the internal logic is powered directly through the USB connection. USB-C to USB-C Cable (included with driver).
Can this driver be installed in fixtures without 0–10V dimming wires connected?
Yes. When 0–10V dimming control is not utilized, simply isolate and cap the purple and gray (or pink) low-voltage dimming wires individually. The driver will operate normally as a standard non-dimming driver at 100% of its programmed output current.
Spec Sheets
Download the official manufacturer documentation and specifications:
Keystone KTLD-20-UV-SC730-56-VDIM-AF4 /USB Specification Sheet
Additional Information
Our Part No.: |
KT-TER-37 |
Manufacturer Part No.: |
KTLD-20-UV-SC730-56-VDIM-AF4 /USB |
Manufacturer Material Code: |
TER-37 |
Brand: |
Keystone |
Fixture Type: |
LED |
Driver Type: |
Constant-Current-Programmable |
Input Voltage: |
120-277V (Universal) |
Max Output Power: |
20W |
Max Output Current: |
730mA |
Output Current Factory Setting: |
730mA |
Output Current Programmable Range: |
200-730mA |
Max Output Voltage: |
56V |
Output Voltage Range: |
10-56V |
Dimming: |
Analog (0-10V) |
Product Data Sheet: |
See PDF Link Provided |
Location Rating: |
Dry/Damp |
Dimensions: |
5.53" (L) x 1.3" (W) x 0.83" (H) Mounting Center 5.2" |
UL Class: |
Class 2 |
Features: |
Field Programmable via USB cable included |
Warranty: |
Manufacturer's |
Case Size: |
10 |
