Self-Locking Miniature Circuit Breaker Lockout
DPX1
DPX1 self-locking miniature circuit breaker lockout device is suitable for locking miniature circuit breakers (MCBs) and molded case circuit breakers (MCCBs) with a handle width ≤10mm. Made of nylon and chrome-plated copper, it features a built-in high-precision brass lock cylinder and can replace traditional locking and tagging devices. It supports industrial padlocks with a hook diameter ≤7mm for multi-person locking/tagging operations.
- Rugged nylon + chrome-plated copper construction for durability & insulation
- Built-in high-precision brass lock cylinder, no extra padlock needed
- Tool-free installation with built-in locking screw
- Movable lock cover shields screw for anti-tampering & anti-loose
- Fits most MCB & MCCB with handle width ≤10mm
- Works with ≤7mm shackle hasp locks & padlocks for LOTO compliance
- High-visibility red color for maximum job site safety
Product Appearance


Core parameters:
- Product Name:DPX1 Self-Locking Miniature Circuit Breaker Lockout with Brass Core
- Material:Nylon + Chrome-Plated Copper
- Product Size:59.2mm × 48mm × 11.2mm (L×W×Thickness)
- Color:Red+Black
- Compatible Handle:Width ≤10mm (MCB & MCCB)
- Locking Method:Built-in locking screw + movable lock cover + built-in brass cylinder
- Built-in Lock:High-precision brass lock cylinder
- Lock Compatibility:Shackle diameter ≤7mm (hasp locks & safety padlocks)
- Installation:Tool-free hand-tighten
- Key Use :Electrical maintenance, LOTO compliance
FAQs
1What breakers does DPX1 fit?
DPX1 fits most miniature (MCB) and molded case (MCCB) circuit breakers with handle width ≤10mm.
2Does DPX1 require a separate padlock?
No. It has a built-in high-precision brass lock cylinder for direct self-locking.
3What materials are used in DPX1?
DPX1 is made of durable nylon and chrome-plated copper, insulated and rust-resistant.
4Is installation tool-free?
Yes. Just hand-tighten the built-in locking screw and close the lock cover—no tools needed.
5What padlocks/hasps can I use with DPX1?
It works with safety hasp locks and industrial padlocks with shackle diameter ≤7mm.
6How does DPX1 prevent tampering?
The movable lock cover covers and locks the screw, preventing unauthorized removal.




