LA1KN313

What does this auxiliary contact block do in a control panel?

It adds additional auxiliary contacts to a compatible TeSys K device so you can expand control, signalling and interlocking functions without changing the main power circuit.

How many auxiliary contacts are provided and what are their states?

It provides four instantaneous auxiliary contacts in total: 3 normally open (NO) and 1 normally closed (NC).

Are the auxiliary contacts instantaneous or time-delayed?

The contacts are instantaneous, meaning they change state immediately with the associated device actuation (no intentional delay).

Where does the block mount on the device?

It is designed for front mounting on compatible TeSys K contactors or control relays, keeping wiring accessible from the front of the assembly.

What termination type does it use?

It uses spring terminals, intended for straightforward, tool-assisted wiring without the need to set a terminal torque value.

What conductor sizes can be connected to the spring terminals?

It accepts 0.75 to 1.5 mm² conductors (solid or flexible). Equivalent control wire size is typically #16 to #18 AWG.

What are the key electrical ratings for insulation and operational voltage?

Rated insulation voltage (Ui) is up to 690 V (IEC 60947 / BS 5424) and up to 750 V (VDE group C). Rated operational voltage (Ue) is up to 690 V AC at up to 400 Hz.

What is the conventional thermal current rating for the auxiliary contacts?

The conventional free-air thermal current (Ith) is 10 A at 50 °C ambient.

Can it switch very low-level signals for PLC or feedback circuits?

Yes. The minimum switching values are 17 V and 5 mA, making it suitable for many low-level control and signalling applications (application suitability should still be verified for the specific circuit).

What short-time current can the contacts withstand?

Permissible short-time ratings include 80 A for 1 second, 60 A for 500 ms, and 110 A for 100 ms (as specified for coordination and withstand considerations).

What ingress protection and environmental limits apply?

It is rated IP2x. Typical operating ambient range is -25 to +50 °C, with storage from -50 to +80 °C, and operation up to 2000 m altitude without temperature derating.

How much space does it add when fitted?

The maximum depth is approximately 35 mm, and typical product mass is about 0.045 kg, which helps when planning panel layout and door clearance.

Which standards and approvals are commonly associated with this accessory?

It is specified with conformity to IEC 60947 and related national standards (including BS and VDE references), and is commonly listed with UL and CSA certifications for use in relevant control panel builds.

Is it suitable for use with reversing configurations?

Yes. It is intended for use with compatible TeSys K contactors, including reversing contactor arrangements, where extra NO/NC auxiliaries are often needed for electrical interlocking and status indication.

Does it require a specific fuse for protection?

For coordination, an associated fuse rating of 10 A gG is referenced (up to 690 V). Final protective device selection should match the overall control circuit design and applicable standards.