The LA9FL4H4H is a mechanical interlock accessory from the TeSys F range, designed to prevent simultaneous closure of two or more contactors in a reversing or bypass configuration. It physically blocks the armature of one contactor when the other is engaged, which is essential for any circuit where a short-circuit fault would occur if both contactors closed at once — motor reversing, star-delta transition, or dual-source transfer schemes. This variant interlocks three vertically mounted contactors. It fits bottom and middle LC1F265 through LC1F330 or CR1F265 through CR1F330, and top LC1F630, LC1F800, or CR1F630.
Schneider TeSys LA9FL4H4H mechanical interlock, for 3 vertic
MPNLA9FL4H4H
Active
Schneider Electric TeSys F LA9FL4H4H mechanical interlock, for 3 vertical contactors, interlocks LC1F265 through LC1F800 and CR1F265 through CR1F630.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product / component type | Mechanical interlock |
| Accessory category | Interlocking accessory |
| Product range | TeSys |
| Parameter | Value |
|---|---|
| Device short name | LA9F |
| Interlocking type | Mechanical |
| Mounting position | 3 vertical |
| Interlocked device | Bottom LC1F265...LC1F330 3P or 4P Bottom CR1F265 3P or 4P Middle LC1F265...LC1F330 3P or 4P Middle CR1F265 3P or 4P Top LC1F630 3P or 4P Top LC1F800 3P Top CR1F630 3P or 4P |
Product details
Frequently asked questions
Which contactors does the LA9FL4H4H interlock?
It interlocks bottom-position LC1F265 through LC1F330 (3 or 4 pole) or CR1F265 through CR1F330 (3 or 4 pole), middle-position units of the same ratings, and top-position LC1F630 (3 or 4 pole), LC1F800 (3 pole), or CR1F630 (3 or 4 pole). All contactors must be mounted vertically.
What is the mounting orientation for this interlock?
The mounting position is 3 vertical — three contactors mounted side by side on a vertical plane. The interlock does not support horizontal stacking.
What is the TeSys range for this part?
The LA9FL4H4H belongs to the TeSys F range, Schneider Electric's heavy-duty contactor and accessory family for motor control and power switching applications.
MPN
LA9FL4H4H