Keystone KTSB-E-2048-46-UV-S 4-6 Lamp T8HO/T12HO Rapid Start Sign Ballast – 120-277V
The Keystone Technologies KTSB-E-2048-46-UV-S is a SmartWire electronic sign ballast for 4–6 T8HO or T12HO lamps with 20'–48' combined T12HO lamp length (20'–36' T8HO). Programmed rapid start, series wiring that matches traditional magnetic sign ballast hookups, on universal 120-277V.
Key Features
- 4, 5, or 6 T12HO or T8HO lamps
- T12HO combined length 20'–48'; T8HO 20'–36'
- Programmed rapid start; series wiring (SmartWire magnetic-style)
- Universal 120-277Vac ±10%
- High power factor >0.90; THD <10%
- Sound Rated A; Type 2 Outdoor / Type HL
- Min. starting −20°F (−29°C); max case 176°F (80°C)
- Metal case ~16.7" L × 3.15" W × 1.18" H
Specifications
-
Model: KTSB-E-2048-46-UV-S
-
Brand: Keystone Technologies
-
Ballast Type: Electronic sign ballast, programmed rapid start
-
Lamps: 4–6 T8HO or T12HO
-
Lamp Footage: T12HO 20'–48' / T8HO 20'–36'
-
Lamp Connection: Series (SmartWire)
-
Input Voltage: 120-277Vac ±10%
-
Frequency: 60 Hz
-
Max Input Power: ~435W @120V (T12HO) / ~390W (T8HO)
-
Power Factor: >0.90
-
Dimensions: 16.7" L × 3.15" W × 1.18" H
-
Mounting Centers: 15.95"
-
Case Material: Metal
-
Certifications: UL/cUL 935, Class P, Type 2 Outdoor, Type HL
-
Warranty: Per Keystone sign ballast policy (typically 4-year)
KTSB-E-2048-46-UV-S spec sheet
Compatible Lamps / Fixtures
- T12HO lamps up to 8' (combined 20'–48')
- T8HO lamps (combined 20'–36')
- Plastic sign cabinets and channel-letter style HO fluorescent signs
Compatible With / Replaces
- Magnetic sign ballasts with matching series/SmartWire hookup
- Other 4–6 lamp 20'–48' electronic sign ballasts
Common Applications
- Backlit business signs
- Channel letters and building fascias
- Sign maintenance and magnetic-to-electronic upgrades
Why Buy from Keystone Technologies?
- SmartWire series wiring matches magnetic layouts
- One ballast covers T8HO and T12HO ranges
- Universal 120-277V Keystone sign platform
Why Buy from LeanLight?
- Fast & free shipping on every order (ships from Georgia)
- Volume and project discounts available
- 30-day satisfaction guarantee with easy returns
- Georgia-based lighting specialists since 2008
