BOM / RFQ

Schneider Electric LA9FK4J4J — Motor Control Accessories

Schneider TeSys LA9FK4J4J Mechanical Interlock, Obsolete

MPNLA9FK4J4J

Obsolete

Schneider TeSys F mechanical interlock, LA9FK4J4J, for 3 vertical contactors, LC1F400/500 and CR1F400/500.

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Schneider Electric LA9FK4J4J datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LA9FK4J4J — Identification
Parameter	Value
Product / component type	Mechanical interlock
Accessory category	Interlocking accessory
Product range	TeSys

LA9FK4J4J — Other specifications
Parameter	Value
Device short name	LA9F
Interlocking type	Mechanical
Mounting position	3 vertical
Interlocked device	Bottom LC1F400 2P or 3P or 4P Bottom CR1F400 3P or 4P Middle LC1F400 2P or 3P or 4P Middle CR1F400 3P or 4P Top LC1F500 2P or 3P or 4P Top CR1F500 3P or 4P

Product details

The LA9FK4J4J is a mechanical interlock from the Schneider TeSys F range, designed to mechanically interlock three contactors mounted vertically. It prevents simultaneous closure of the interlocked devices, a requirement for reversing or star-delta motor starter configurations where two contactors must never be closed at the same time. Fits bottom LC1F400, CR1F400, middle LC1F400, CR1F400, and top LC1F500, CR1F500 contactors. Mounting position is 3 vertical.

Schneider lists the LA9FK4J4J as obsolete. No direct successor order code is available. Sourcing is via independent distribution against an RFQ.

Frequently asked questions

What contactors does the LA9FK4J4J interlock?

It interlocks bottom LC1F400 2P/3P/4P or CR1F400 3P/4P, middle LC1F400 2P/3P/4P or CR1F400 3P/4P, and top LC1F500 2P/3P/4P or CR1F500 3P/4P, all mounted vertically.