OSRAM QTP-OPTIMAL 1x18–40 - Multiwatt electronic ballast for T5/T8 fluorescent and CFL lamps, non-dimmable
The OSRAM QTP-OPTIMAL 1x18–40 is a highly reliable professional electronic ballast for operating fluorescent lamps in the 18–40 W range (T8/T5 HO and CFL compact fluorescent lamps). Designed for demanding installations in offices, industrial facilities, and public buildings, it incorporates Cut-Off technology for maximum efficiency, optimized preheating start-up to extend lamp life, and automatic restart after lamp replacement. Its electronics support 220–240 V AC mains and also DC power (0 Hz) between 176–276 V , making it suitable for emergency lighting . With a lifespan of up to 100,000 hours (at Tc 65 °C, max. 10% failure rate), it meets key safety and electromagnetic compatibility standards and offers high-frequency operation (40–50 kHz) that eliminates visible flicker and the hum associated with magnetic equipment.
Main features
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Compatible lamp range (1 lamp): 18…40 W (T8 linear fluorescent, T5 HO 24/39 W and DULUX/PL-L type CFL)
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Non-adjustable: stable ON/OFF operation, no dimming function
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Cut-Off Technology: High Energy Efficiency (EEI A2 BAT )
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Soft start: optimal filament preheating; start-up time: 1.5 s
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Operating frequency: 40…50 kHz
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Automatic restart after lamp replacement and EoL T.2 disconnection at the end of life
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Suitable for emergency use: operates on DC 176…276 V (mains frequency 0 Hz)
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Equipment protection class: I; suitable for class I and II luminaires
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Protection type: IP20
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Certifications: EL, VDE, ENEC 10, VDE-EMC
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Regulations: EN 61347-2-3 / App. J; EN 55015; IEC/EN 61000-3-2; IEC 61547
Electrical data
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Nominal voltage: 220…240 V AC
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Input voltage (AC): 198…264 V
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Input voltage (DC): 176…276 V
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Mains frequency: 0 / 50 / 60 Hz
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Maximum output power: 40 W
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Inrush current: 24 A
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Maximum number of ballasts per circuit breaker: 17 units (10 A type B) / 28 units (16 A type B)
Construction and dimensions
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Body material: metal
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Length × width × height: 280 × 30 × 21 mm
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Mounting center distance: 270 mm
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Weight: 180 g
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Max. cable length: ECG 2.0 m / lamp 1.0 m
Performance and durability
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Equipment lifespan: up to 100,000 h (at Tc = 65 °C, failure rate ≤10%)
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Operating temperature range: −20…+50 °C; Permissible RH 5…85 % (max. 56 days/year at 85%)
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Maximum temperature at point Tc : 75 °C
Product benefits
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Longer lamp and equipment life: preheating start and electrode cut-off extend system life
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No penalty for frequent switching: ideal for presence/motion sensors
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High efficiency: Cut-Off technology and A2 BAT class to reduce consumption
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Continuity of service: automatic restart after lamp change and EoL protection
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Versatility in safety: suitable for DC emergency and class I/II luminaires
Use cases
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Offices and retail: continuous strips, corridors, common areas
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Industry and logistics: factories, warehouses and technical areas
- Public and educational buildings
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Emergency lighting: DC compatibility according to EN 50172 / DIN VDE 0108-100
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Modernization: replacement of magnetic equipment with high-efficiency electronic control gear
Frequently Asked Questions
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Is it dimmable? No, this model does not include a dimming function.
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What lamps does it accept? One 18…40 W lamp: T8 (e.g. 18/30/36/40 W), T5 HO (24/39 W) and CFL type DULUX/PL-L (18/24/36/40 W), according to the power combination indicated by the manufacturer.
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Is it suitable for emergency use? Yes, it can operate on 176…276 V DC (0 Hz), suitable for emergency systems.
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In which luminaires can it be mounted? In class I and II luminaires; the equipment has protection class I and an IP20 rating.
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How does temperature affect lifespan? At a Tc of 65 °C, lifespan reaches up to 100,000 hours ; excessive temperature reduces durability.
Installation recommendations
- Keep the cables between the ballast and the lamp as short as possible and route them in pairs to minimize interference.
- Check the conductor cross-section and proper grounding in Class I luminaires.
- Respect the Tc point on the equipment nameplate and ensure adequate ventilation in the luminaire.
- Use type B circuit breakers and consider the inrush current (24 A) when sizing the circuit.
Project description
OSRAM QTP-OPTIMAL 1x18–40 electronic ballast, non-dimmable, for one 18…40 W lamp; AC input 198…264 V (nominal 220…240 V) and DC input 176…276 V ; mains frequency 0/50/60 Hz ; operating frequency 40…50 kHz ; warm-up start (1.5 s); EoL T.2 ; EEI A2 BAT ; IP20 , class I , suitable for class I/II luminaires; dimensions 280 × 30 × 21 mm , center-to-center distance 270 mm , weight 180 g ; ta −20…+50 °C; ECG life up to 100,000 h at Tc 65 °C.
