The LA9FJ4G4F is a mechanical interlock accessory from the Schneider Electric TeSys F range, designed to prevent simultaneous closure of two contactors in a reversing or star-delta starter configuration. It mounts in a 3-vertical stack, mechanically coupling the contactor armatures so only one can close at a time — critical for avoiding phase-to-phase shorts on motor circuits. This interlock is compatible with bottom-position LC1F115 through LC1F150 (3P or 4P) and CR1F150 (3P or 4P), middle-position LC1F185 through LC1F225 (3P or 4P) and CR1F185 (3P or 4P), and top-position LC1F400 (2P, 3P, or 4P) and CR1F400 (3P or 4P). That covers the full TeSys F contactor family from 115 A to 400 A frame sizes.
Schneider LA9FJ4G4F TeSys F Mechanical Interlock, 3 Vertical
MPNLA9FJ4G4F
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Schneider Electric TeSys F, mechanical interlock LA9FJ4G4F, for 3 vertical contactors, LC1F115–LC1F400 range.
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 LC1F115...LC1F150 3P or 4P Bottom CR1F150 3P or 4P Middle LC1F185...LC1F225 3P or 4P Middle CR1F185 3P or 4P Top LC1F400 2P or 3P or 4P Top CR1F400 3P or 4P |
Product details
Frequently asked questions
What contactors does this mechanical interlock work with?
It interlocks LC1F115 through LC1F400 contactors (and CR1F reversing contactors) in a vertical stack. Bottom position accepts up to LC1F150, middle up to LC1F225, top up to LC1F400.
What is the mounting orientation?
3 vertical — three contactors stacked vertically, mechanically linked by this interlock bar. That's the standard arrangement for reversing or two-speed motor starters in a TeSys F panel.
MPN
LA9FJ4G4F