LS3390A Aluminium Circuit Breaker Lockout, Max Clamping 6.7 mm
Code: LS3390A
Circuit breaker lockout LS3390A made of aluminium alloy with a maximum clamping width of 6.7 mm. It fits on the breaker toggle and is tightened with a screwdriver, and suits most existing European and Asian circuit breakers, single and multi-pole. It accepts a padlock with a shackle diameter up to 8.5 mm. A circuit breaker lockout holds the breaker handle in a fixed position, typically OFF, and is secured with a padlock so the circuit cannot be switched during maintenance.
Prices are sent in a quotation once you submit your cart, adjusted to your quantity and delivery location.
Key features
- Aluminium alloy construction
- Fits on breaker toggles, tightened with a screwdriver
- For most European and Asian circuit breakers, single and multi-pole
- Accepts padlock shackles up to 8.5 mm diameter
- OEM colours available
Technical specifications
| Max clamping | 6.7 mm |
|---|---|
| Max padlock shackle diameter | 8.5 mm |
| Material | Aluminium alloy |
| Installation | Screwdriver |
| Dimensions | 24.25 x 17 mm |
| Colour | Silver (shown), OEM colours available |
Used in
Electrical panels and distribution boardsIsolation of circuit breakers during maintenance
BUYER'S GUIDE
Choosing a Circuit Breaker Lockout
A circuit breaker lockout holds the breaker toggle in the OFF position so it cannot be switched on while work is under way. Fit depends on the breaker type, size and toggle shape.
- Identify the breaker first: miniature (MCB), moulded case (MCCB) or large industrial, single or multi-pole, and the toggle width and thickness.
- Pin-in and pin-out types fit the holes beside the toggle; clamp-on types grip the toggle itself and suit breakers without holes.
- Tool-free designs are quicker to fit; screw-fixed designs hold more firmly on large breakers.
- A lockout device does not replace verification. After locking, test that the circuit is de-energised before work starts.
Summarised from the manufacturer's catalogue and the general requirements for lockout devices in OSHA 29 CFR 1910.147. Device selection must follow your written energy isolation procedure and site risk assessment.
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Technical data from the manufacturer's catalogue, page 13. Specifications may change; please confirm with our team before ordering.
