Sylvania 49673 QT2x54/120PHO-DIM

The Sylvania Quicktronic Helios® Professional 49763 (QT2x54/120PHO-DIM) Ballast is a commercial-grade, specialized electronic dimming control gear module engineered to operate one or two high-output T5 (T5HO) linear fluorescent lamps. Designed strictly for dedicated 120V systems, this high-performance ballast features an isolated 0-10V analog dimming architecture that delivers smooth, continuous illumination control scaling from 100% full bright down to an energy-saving 1% low-end standby threshold. Utilizing premium PROStart® programmed rapid start technology to safely condition cathode filaments prior to gas discharge ignition, this ballast features integrated QUICKSENSE® end-of-lamp-life sensing and anti-flash circuitry, making it the definitive choice for architectural daylight harvesting, commercial offices, and smart building networks.

ADL Supply Expert Application & Replacement Guide

The Sylvania Quicktronic Helios 49763 dimming control gear is a premium architectural baseline specified heavily by electrical contractors, real estate engineers, and facility procurement groups implementing automated load-shedding upgrades or daylight harvesting matrices. Delivering up to 188% higher lumen output metrics compared to standard T8 fluorescent fixtures, this high-output T5HO device enables lighting designers to slash structural bulb counts and reduce overall fixture requirements while establishing complete, smooth analog command over interior footcandle thresholds.

Critical 120V Dedicated Voltage Line Restriction & Un-Shunted Sockets Mandate: Electrical installers executing routine building retrofits must verify facility circuit parameters closely prior to cart checkout: this specialized Helios module operates strictly on dedicated 120V AC lines. Attempting to link this device into standard commercial 277V high-bay circuits will instantly bypass internal surge suppression gates, creating terminal capacitor failure and permanent component destruction.

Furthermore, because its advanced starting path uses PROStart® programmed rapid start engineering, un-shunted lampholders are strictly mandatory at all socket termination nodes. Un-shunted sockets keep the electrical pin pathways completely isolated, allowing the ballast to pass a dedicated low-voltage preheating current to condition the tube filament cathodes safely before firing the primary high-voltage gas arc. Forcing this device into old shunted sockets will cross wire circuits, prompting immediate control board burnout or ignition dropouts. Violet and gray wires route the isolated 0-10V DC analog dimming current to prevent inline interference clashing from mainline power tracks.

Detailed Product Specifications

• Brand: Sylvania (Ledvance / Quicktronic Helios® Commercial Dimming Line)
• Product Series Line: Quicktronic® Professional High-Output T5HO Dimmable Series
• Sylvania Individual Item Order Code SKU: 49763 (Single retail pack) / 49673 (Wholesale 20-Pack cross reference)
• Manufacturer Description Nomenclature Model: QT2x54/120PHO-DIM
• UPC Barcode Number (GTIN-12): 046135497636
• Core Technology Class: Solid-State High-Frequency Dimmable Electronic Ballast
• Starting Method Classification: PROStart® Programmed Rapid Start (Optimized for active occupancy loops)
• Dimming Control Format: 0-10V DC Analog Current Sinking Protocol (sources <0.5mA control load)
• Dimming Graduation Intensity Range: Continuous smooth modulation from 100% down to 1% standby
• Lamp Wiring Selection Architecture: Series Circuit Operation
• Nominal Operational Input Voltage: 120 Volts AC Dedicated Mainline Power
• Input Voltage Operating Range: ±10% of Rated Input line voltage tolerances
• Line Current Frequency Threshold: 60 Hz
• Total Input Current Load: 1.07 Amperes
• Peak System Input Power: 117 Watts (Full high-output scale)
• Low-End Dimmed Input Power: 18 Watts (1% minimum brightness scale)
• Systemic Ballast Factor (BF): 1.00 normal high-output factor baseline
• Total Harmonic Distortion (THD) Limit: Less than 10% under full load (Commercial Power Grade Protection)
• Power Factor Correction Level: Active Correction Network (Greater than 0.98)
• Audible Component Sound Rating: Class A (Whisper Quiet Architectural Standard)
• Safety Features Protection: QUICKSENSE® Dynamic End-of-Lamp-Life Automatic Circuit Disconnect Protection
• Special Operational Tuning: Integrated Anti-Flash Suppression Network during low step transitions
• Compliance Certifications: UL Listed Class P, Type 1 Outdoor, CSA Certified, FCC 47CFR Part 18 Non-Consumer, RoHS Compliant
• Systemic Coverage: Backed by the patented Sylvania QUICK 60+® System Warranty network

Certified System Load Matrix (Lamping Matrix)

This multi-lamp dimming controller is fully certified to strike and manage the following tube configurations safely. Do not use with energy-saving T5HO lamps:

• (1 or 2 Lamps) FP54T5HO: Full-wattage high-output 54W 46.2-inch linear fluorescent T5 lamps (PENTRON® HO core lines)
• (1 or 2 Lamps) FT55DL: High-output 55W long compact twin-tube fluorescent lamps with 4-pin 2G11 bases (DULUX® L T5 lines)
• (1 or 2 Lamps) FPC55: High-output 55W circular compact fluorescent lamps with 4-pin bases (PENTRON® HO Circline lines)

Operation, Safety & Mounting Compliance

High-Frequency Electronic Signal Transformation

This electronic assembly converts raw alternating current into high-frequency ballast outputs exceeding 42 kHz, completely eliminating stroboscopic eye fatigue and visual rolling shadows common in old low-frequency magnetic systems. It incorporates an automated active surge insulation barrier that blocks standard utility switching transients and operational spikes from breaking down sensitive internal solid-state board capacitors.

Chassis Physical Structural Footprint Dimensions

• Maximum Overall Length (MOL): 16.73" Inches (425mm actual bracket footprint length)
• Chassis Housing Body Length: 16.34" Inches (415mm actual mounting spacing layout)
• Chassis Housing Section Width: 1.18" Inches (30mm actual slim profile stick width)
• Chassis Total Housing Height: 1.18" Inches (30mm actual vertical thickness)
• Maximum Remote Mounting Field Distance: Up to 7 feet away from fixture lampholders using 18AWG solid copper lines

Commercial Control Gear Equipment Cross-References

This dedicated 120V 0-10V analog dimming ballast serves as an electrical equivalent or drop-in alternative for the following models:

• Philips Advance Match: IZT-2S54-SC / Mark 7 0-10V Dimming T5HO 120V Series
• Universal Triad Alternative: B254PW120-D / High-Performance 0-10V Dimming T5HO 120V Lines
• Lutron Reference alternative: Eco-10 / TVE-T554-120 / Low-End Analog Control Series T5HO Bal

Bulk Commercial Lighting Supply & Project Support

ADL Supply handles volume distribution shipments, multi-pack logistics, and contractor project quotes for procurement teams, schools, and warehouse facilities nationwide.

For specialized contractor pricing tiers, job-site pallet deliveries, or comprehensive submittal documentation, contact our support team directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.