OSRAM QTP-OPTIMAL 2x54-58 - Multi-power electronic ballast for T5/T8/PL-L with Cut-Off technology
The OSRAM QTP-OPTIMAL 2x54-58 (QUICKTRONIC® PROFESSIONAL) is a non-dimmable electronic control unit (ECG) for two fluorescent lamps, offering high reliability, maximum efficiency, and multiwatt compatibility. Thanks to Cut-Off technology and optimal filament preheating , it extends lamp life and ensures smooth start-up in applications with occupancy sensors. Designed for frequent switching without adverse effects, it features automatic restart after lamp replacement and operates on AC 220–240 V or DC 176–276 V , making it suitable for emergency lighting (0/50/60 Hz). Its A2 BAT energy efficiency rating , power factor ≈0.99 , and full-load efficiency of up to 95% make it a highly efficient system for offices, industrial facilities, and public buildings.
This electronic ballast supports 2 x 54W T5 HO , 2 x 58W T8 , and 2 x 55W PL-L (DULUX L) bulbs , operating at a high frequency of 40–50 kHz for quiet, flicker-free operation. It offers a start-up time of 1.5 seconds and restarts in <0.3 seconds after micro-interruptions (<0.5 seconds). It is VDE/ENEC certified , complies with EN 61347-2-3 and EN 60929 standards, and incorporates EoL T.2 protection (safe disconnection at the end of life). Its compact design ( 360 x 30 x 21 mm , weight 239.9 g , IP20 ) facilitates integration into Class I luminaires, and it is also suitable for Class I/II luminaires.
Main features
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Multi-power / multi-technology: controls 2× 54 W T5 HO, 2× 58 W T8 and 2× 55 W PL-L.
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Wide power supply: 220…240 V~ (198…264 V~) and 176…276 V⎓; mains frequency 0/50/60 Hz .
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High system efficiency: Cut-Off , EEI A2 BAT , full load efficiency up to 95% and power factor ≈0.99 .
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Reliable start-up: optimal filament preheating, 1.5s start-up time; restart <0.3s after micro-cuts.
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Operating frequency: 40…50 kHz for stable, buzz-free operation.
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Long ECG life: up to 100,000 h at T c = 65 °C (10% max. failure rate).
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Emergency prepared: suitable for emergency lighting systems (DC operation).
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Integrated protections: Automatic EoL T.2 disconnection for defective or end-of-life lamps.
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Frequent switching: without prejudice to the life of the lamp or the ballast.
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Certifications: VDE / ENEC 10 / VDE-EMC; compliance with EN 61347-2-3, EN 60929, EN 55015, EN 61000-3-2 and EN 61547.
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Luminaire compatibility: suitable for class I/II luminaires; ECG protection class: I ; IP20 .
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Compact dimensions: 360 × 30 × 21 mm; distance between drills 350 mm ; weight 239.9 g .
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Environmental conditions: −20…+50 °C; humidity 5…85 % (max. 56 days/year at 85%).
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Max. wiring (ECG/lamp): 2.0 m / 1.0 m.
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Inrush current: 57 A; max. number of ECGs per circuit breaker B 10 A: 8 | 16 A: 13 .
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Working output voltage (U-OUT): 430 V.
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Not adjustable: ON/OFF operation.
Product benefits
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Less maintenance: frequent switching and soft start extend the life of the lamps and the system.
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Real energy efficiency: Cut-Off reduces losses after startup and helps to meet savings targets.
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Reliability in buildings: automatic restart after lamp replacement and tolerance to micro-outages.
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Design versatility: a single ballast for T5, T8 and PL-L simplifies stock and replacement.
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Safety compatibility: suitable for emergency lighting (DC) and systems with motion sensors.
Use cases
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Offices and open spaces: linear and continuous luminaires ( strip lighting ).
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Corridors, warehouses and indoor parking areas: with presence/absence sensors.
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Public buildings, educational and healthcare centers: reliable and efficient operation.
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Light industry and sports centers: high number of commutes and demand for uniformity.
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Modernization: replacement of electromagnetic ballasts with electronic ones while maintaining existing T5/T8/PL-L.
Frequently Asked Questions
Is it dimmable? No. The QTP-OPTIMAL 2x54-58 is designed for switched (on/off) operation and does not support dimming.
What lamps does it control? Two T5 HO 54W tubes, two T8 58W tubes, or two PL-L 55W tubes (DULUX L). It also supports T5 HO 50W tubes (ES).
Is it suitable for emergency lighting? Yes, it can operate on 176…276 V DC according to normal emergency requirements.
Does it tolerate frequent switching or sensors? Yes, it is optimized for frequent connections and disconnections and offers perfect start-up with motion sensors.
What is my wiring limit? Up to 2.0 m on the ECG side and 1.0 m towards each lamp (respect diagrams and conductor twisting).
What protection and certifications does it have? IP20 , protection class I , VDE/ENEC 10/VDE-EMC marking and compliance with EN safety and electromagnetic compatibility standards.
Installation and compatibility
- Surface mounting or mounting inside the luminaire with 350 mm hole spacing . Ensure heat dissipation to maintain T c ≤ 65 °C .
- Keep cable lengths within limits and keep the conductors at each lamp end close together to minimize interference.
- Always check the luminaire class (I/II) and the conductor section according to local regulations.
Project description
OSRAM QUICKTRONIC® PROFESSIONAL QTP-OPTIMAL 2x54-58 electronic ballast; non-dimmable; for 2 x 54…58 W lamps (T5 HO 54 W / T8 58 W / PL-L 55 W); input 220…240 V~ (198…264 V~) and 176…276 V⎓; mains frequency 0/50/60 Hz; operating frequency 40…50 kHz; start-up time 1.5 s (restart <0.3 s after micro-interruption <0.5 s); full load efficiency up to 95%; power factor ≈0.99; inrush current 57 A; max. 8 ECG (B-10 A) / 13 ECG (B-16 A); max. ECG/lamp wiring 2.0 m / 1.0 m; EoL T.2 protection; protection class I; IP20; dimensions 360 × 30 × 21 mm; hole spacing 350 mm; suitable for emergency use (DC operation); ECG life up to 100,000 ha T c = 65 °C; complies with EN 61347-2-3, EN 60929, EN 55015, EN 61000-3-2 and EN 61547.
