Weidmüller part number 1201010000 (KTB QL 987420 S4E1) is a Klippon® TB QL heavy-duty stainless steel enclosure from the Quarter Lock range, built for demanding industrial and hazardous-area installations. The QL series uses a quick quarter-turn lock for fast, tool-assisted lid access. This is the largest standard size in the range, measuring 980 x 740 x 200 mm, and is supplied with a single gland plate positioned on the bottom side.
Technical Specifications
Dimensions and Housing
- Overall size (H x W x D): 980 x 740 x 200 mm
- Net weight: approx. 34.8 kg (1 gland-plate configuration)
- Housing type: Klippon® TB QL – Quarter Lock, seamless welded construction
- Gland plate: 1, positioned on the bottom side, thickness 3 mm as standard (up to 20 mm available on request)
Material and Protection Rating
- Material: stainless steel 1.4404 (316L), electropolished, silver finish (S4E variant)
- Protection rating: IP66
- NEMA rating: 3, 4X, 12
- Gasket: silicone, rated for extreme temperature requirements
- Operating temperature range: -60°C to +135°C
- Impact resistance: 7 J (ATEX applications), 10 J (industrial applications)
Lid, Locking and Access
- Lid opening: fully removable, 130° opening angle
- Lid fixing: quarter-turn lock with slotted insert as standard (other lock inserts available on request)
- Earth stud fitted to body and lid
- Recommended torque for lid and gland plate screws: 2.5 Nm
Mounting, Earthing and Cable Entry
- Equipment mounting: 4–6 internal mounting pillars with M6 threaded holes for mounting plates or terminal rail
- Enclosure mounting: 4 welded-on mounting feet with 11 mm holes (2 slotted, 2 cross-shaped)
- Internal earthing: welded-on M6 stainless steel earth stud (body and lid)
- External earthing: continuous M10 brass earthing stud (stainless steel option available)
- Cable entry capacity (side A/B): M12 up to 96/126, M20 up to 42/54, M32 up to 20/26, M50 up to 6/10
Terminal Capacity
This size supports the highest terminal density in the range, for example:
- 2.5 mm²: up to 9 rows x 127 terminals (horizontal)
- 6 mm²: up to 7 rows x 80 terminals
- 16 mm²: up to 5 rows x 54 terminals
- 35 mm²: up to 4 rows x 40 terminals
Applications
The Klippon® TB QL range is designed for harsh environments and hazardous area locations, including explosive risk zones, process and energy industry installations, oil and gas, chemical plants, and offshore/onshore facilities, where a quick quarter-turn lock is preferred over a hinged lid. This large, single gland-plate configuration suits applications needing maximum internal space with a single cable entry point.
Related Weidmüller Products
- KTB QL 987420 S4E2 (same size, 2 gland plates) – Order No. 1201020000
- KTB QL 987420 S4E4 (same size, 4 gland plates) – Order No. 1201040000
- KTB QL 916120 S4E1 (smaller size, 914 x 610 x 200mm, 1 gland plate) – Order No. 1200950000
- KTB MH 987420 S4E1 (same size, Multi-Hinge lid, 1 gland plate) – Order No. 1195610000
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