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Small rectangular Siemens handle blocking device, silver metal finish, mounting screw included

SIEMENS

SIEMENS Handle Blocking Device BQDHBD 0.46 in 0.37 in

SKU CH-ZC0J-QCSSX

Handle blocking device for Siemens BQD, CQD, NGG and NGB breakers, 0.46 in long and 0.37 in wide with mechanical locking and included mounting screw

  • Locks breaker handle in off position for safe maintenance
  • Fits BQD, CQD, NGG and NGB breakers across one to three poles
  • Compact 0.46 in by 0.37 in footprint saves panel space
  • Mechanical locking feature prevents accidental re-energisation
  • Includes mounting screw for immediate installation

Application Scope

This handle blocking device fits Siemens BQD, CQD, NGG and NGB circuit breakers across one, two and three pole configurations. It is intended for electricians and maintenance teams who need a positive mechanical lockout on those specific breaker families.

Retrofit Fitment

The device replaces ad-hoc lockout methods such as cable ties or improvised clamps on the listed Siemens breakers. The jump is worth it when a facility requires a repeatable, screw-mounted mechanical lock that meets internal lockout-tagout procedures without modifying the breaker.

Sustained Operation

A single mounting screw secures the block to the breaker handle, providing a fixed mechanical barrier that does not rely on friction or spring tension. The compact 0.46 in by 0.37 in footprint ensures the lock remains engaged during vibration and thermal cycling typical in panelboard environments.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Will the 0.46 in by 0.37 in handle blocker fit my Siemens BQD or CQD breaker?

The device is designed for Siemens BQD, CQD, NGG and NGB breakers in one, two or three pole versions.

Which way does the included mounting screw go in, and what do installers often miss?

The screw threads into the breaker handle to lock it mechanically; the common error is leaving the screw loose so the handle can still move.

Does the mechanical locking feature wear out or need periodic replacement?

The mechanical lock has no consumable parts; replacement is only needed if the screw strips or the body cracks from impact.

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