The Series 6057 is STAHL's flameproof (Ex d) well glass pendant light fitting, engineered for lighting hazardous areas classified as Zone 1 and Zone 21, the gas and dust-hazardous zones common in refineries, chemical plants, and process industries. Built from copper-free aluminium for full corrosion resistance and finished in a durable powder coat, it houses its driver and LED unit in two physically separate compartments, so a fault in one doesn't compromise the other, a genuinely fail-safe design rather than just a rugged enclosure around standard components. It withstands mechanical impact up to 20J (IK10 rated), operates across a -20°C to +60°C ambient range, and is certified and approved by PESO for use in the classified zones it's rated for, with a driver life promise exceeding 50,000 operating hours at 50°C ambient.
| Wattage | Reflector | Luminous Flux | Luminaire Efficacy | Product Type | Art. No. | Weight (kg) |
|---|---|---|---|---|---|---|
| 25 W | Internal | 3,070 lm | 113 lm/W | 6057/2112-101-4310-121-200 Pend. Zn1 IND | 288953 | 5 |
| 25 W | Internal | 3,070 lm | 113 lm/W | 6057/2112-101-4330-121-200 Pend. Zn1 IND | 288954 | 5 |
| 45 W | Internal | 4,661 lm | 104 lm/W | 6057/2114-101-4310-121-200 Pend. Zn1 IND | 288955 | 5 |
| 45 W | Internal | 4,661 lm | 104 lm/W | 6057/2114-101-4330-121-200 Pend. Zn1 IND | 288956 | 5 |
| 65 W | Internal | 6,759 lm | 109 lm/W | 6057/2116-101-4310-121-200 Pend. Zn1 IND | 288957 | 5 |
| 65 W | Internal | 6,759 lm | 109 lm/W | 6057/2116-101-4330-121-200 Pend. Zn1 IND | 288958 | 5 |
| 80 W | Internal | 7,955 lm | 103 lm/W | 6057/2118-201-4310-121-200 Pend. Zn1 IND | 288959 | 5 |
| 80 W | Internal | 7,955 lm | 103 lm/W | 6057/2118-201-4330-121-200 Pend. Zn1 IND | 288960 | 5 |
| Description | Art. No. |
|---|---|
| Wall/ceiling mounting bracket, spare, 1.4301 | 288823 |
| Ring bolt M8x9, similar to DIN 580 C15 | 115896 |
| Horizontal pipe mounting bracket, Ø50mm | 289889 |
| Vertical pipe mounting bracket, Ø50mm | 289890 |
| Horizontal pipe mounting bracket, Ø60mm | 290041 |
| Vertical pipe mounting bracket, Ø60mm | 290042 |
| Spec | 25W | 45W | 65W | 80W |
|---|---|---|---|---|
| Certificate Number | KLPL/Ex/21-032X (all variants) | |||
| Gas Marking | Ex db IIC T6 Gb | Ex db IIC T6 Gb | Ex db IIC T5 Gb | Ex db IIC T5 Gb |
| Dust Marking | Ex tb IIIC T85°C Db | Ex tb IIIC T85°C | Ex tb IIIC T100°C Db | Ex tb IIIC T100°C Db |
| Approval | PESO (all variants) | |||
| Spec | Details |
|---|---|
| Rated Operational Voltage | 220–240V AC ±10% (optional 110–277V ±10% on request) |
| Rated Operational Current | ≤0.130A (25W) / ≤0.210A (45W) / ≤0.288A (65W) / ≤0.363A (80W) |
| Frequency | 50/60 Hz |
| Power Factor | ≥0.96 |
| THD | <11% (25W/45W) / <10% (65W/80W) |
| Inrush Current | ≤16A, Δt=100μs (25/45/65W); ≤64A, Δt=108μs (80W) |
| Surge Protection | 4kV standard (20kV on request) |
| Spec | Details |
|---|---|
| LED Colour Temperature | 5700K (5000K, 6500K on request) |
| Colour Rendering Index | >80 |
| Spec | Details |
|---|---|
| Operating Temperature | -20°C to +50°C (+60°C on request for 25W/45W/65W; +55°C on request for 80W) |
| Storage Temperature | -20°C to +60°C |
| Spec | Details |
|---|---|
| Degree of Protection | IP66 / IP67 |
| IK Rating | IK10 (impact resistant up to 20J) |
| Protection Class | I |
| Enclosure Material | Aluminium (copper-free) |
| Enclosure Colour | Powder coated, RAL 7035 |
| Lamp Cover Material | Borosilicate toughened glass (dome) |
| Gasket Material | Silicone |
| Lamp Cover Locking | Threaded |
| Spec | 25W | 45W | 65W | 80W |
|---|---|---|---|---|
| Driver Life @ Ta 50°C (C10) | 50,000h | 50,000h | 40,000h | 50,000h |
| LED Service Life (L70B50 @ Ta 50°C) | 100,000h | 100,000h | 100,000h | 80,000h |
| Spec | Details |
|---|---|
| Standard Connection | 4 sq.mm |
| Trough Wiring | Loop in / loop out, max. 3x10A |
| Cable Entries | 2 x M20 |
| Cable Glands | On request |
| Stopping Plug | On request |
| Wire Guard | On request |
| Spec | Details |
|---|---|
| Diameter | 234 mm (184.10 mm inner dome) |
| Depth | 114.75 mm |
| Mounting Bolt Pattern | 3 x M8 |
Find answers to common questions about our products and solutions.
It's rated for PESO-approved installation in Zone 1, Zone 2 (gas hazardous zones), and Zone 21, Zone 22 (dust hazardous zones), making it suitable for both gas and dust classified areas.
Ex d (flameproof) protection means the enclosure is designed so that if an internal explosion were to occur, it would be contained within the housing and prevented from igniting the surrounding hazardous atmosphere — a fundamentally different protection principle than simply sealing the enclosure against dust or gas ingress.
25W, 45W, 65W, and 80W variants, with luminous flux ranging from 3,070 lm to 7,955 lm and luminaire efficacy between 103 and 113 lm/W.
Standard pendant mounting is available, along with wall, ceiling, suspension (via ring bolt), or pole mounting using horizontal or vertical pipe brackets (Ø50mm or Ø60mm). All mounting accessories are available separately.
The driver unit and LED unit are housed in physically separate compartments, isolating a fault in one from affecting the other — improving overall reliability and helping maintain the explosion-protection integrity of the fitting.
Driver life is rated at 40,000–50,000 hours (C10 = 10% failure rate) at 50°C ambient depending on wattage, while LED service life is rated at 80,000–100,000 hours (L70B50 @ Ta 50°C).
Standard operating range is -20°C to +50°C, with +60°C available on request for the 25W, 45W, and 65W variants, and +55°C on request for the 80W variant.
It's certified under KLPL/Ex/21-032X and approved by PESO, with gas marking Ex db IIC T6 Gb or Ex db IIC T5 Gb (depending on wattage) and dust marking Ex tb IIIC T85°C Db to T100°C Db.
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