Name: Square D TeSys Ultra Auxiliary Contact Block
Brand: Square D
SKU: LUA1C11
Price: 67.97 USD
Availability: InStock

Product Overview
FAQs

Square D TeSys Ultra 2 NO Auxiliary Contact Block

The Square D TeSys Ultra 2 NO Auxiliary Contact Block is a signaling contact block designed for TeSys U starter controllers. It provides 1 NO contact for open/close status (OF contact) and 1 NO contact for tripping status (SD contact), rated up to 5A at 250V AC/DC. The block installs directly into the designated location on the TeSys U controller and terminates via screw clamp terminals, with a rated insulation voltage (Ui) of 250V per CSA, UL, and IEC 60947-5-1.

Key Features

Signaling Function: Provides fault signaling and indicates the rotary knob in the ready position for clear operational status feedback.
Contact Configuration: 1 NO contact for open/close (OF) status and 1 NO contact for tripping (SD) status, for a total of 2 NO contacts.
Operational Voltage (Ue): Rated <= 250V AC and <= 250V DC for flexible integration into AC or DC control circuits.
Insulation Voltage (Ui): 250V per CSA, UL, and IEC 60947-5-1 standards.
Thermal Current: Ith conventional free-air thermal current rated at 2.5A.
Connections: Terminates via screw clamp terminals for secure, serviceable field wiring.
Minimum Switching Voltage: Rated at 17V for reliable low-level signal switching.
Compatibility: Designed for the TeSys Ultra (TeSys U) range, compatibility code LUA1.

Technical Specifications

Toxic Heavy Metal Free: Yes
Take Back: No
Warranty: 18 months
Returnability: Yes
Product Contributes To Saved And Avoided Emissions: No
Warranty Period: 18 months
Sustainable Packaging: No
Mercury Free: Yes
Packaging Without Single Use Plastic: No
Reach Free Shvc: Yes
ROHS Eur In Scope: Yes
Recycled Metal Content At Cr Level: 0 %
Legacy WEEE Scope: In
Packaging Made With Recycled Cardboard: Yes
China ROHS Label: 1
Serviceability: No
With Recycled Cardboard: Yes
WEEE Product Category: 5
Without Single Use Plastic: No
Product Availability: Stock - Normally stocked in distribution facility
ROHS Exemption Information: Yes
Traceability: No
WEEE Scope: In
Reach Free Of Svhc: Yes
Minimum Switching Voltage: 17 V

Typical Applications

TeSys U Starter Controller Signaling Circuits
Motor Control Center Status Monitoring
Fault Signaling and Trip Indication
Open/Close Status Feedback for Motor Starters
Industrial Control Panel Wiring

Why Square D?

Square D TeSys Ultra components are engineered for reliable, code-compliant performance in demanding industrial control environments. With screw clamp terminals for secure connections and insulation ratings verified to CSA, UL, and IEC 60947-5-1 standards, this auxiliary contact block delivers dependable signaling for TeSys U starter controller installations.

Manufacturer Resources

Product Specs

Series:: TeSys Ultra
Voltage Rating:: 250V AC/DC
Department:: Electrical
Amperage Rating:: 5A
Product Type:: Auxiliary Contact
Connection Type:: Screw Clamp
Product Group:: Motor Control & Automation
Product Subgroup:: Contactors & Relays

Square D LUA1C11 – Frequently Asked Questions

1) Which TeSys U contact block do I order, LUA1C11 or LUA1C20?

Both are LUA1C signaling blocks for TeSys U starter controllers; the difference is contact configuration. LUA1C20 gives 2 NO: one NO for open/close status (OF) and one NO for trip status (SD). LUA1C11 gives 1 NO/1 NC. If your PLC input expects a normally closed trip or status contact, take the 11; if both signals are wired as normally open, take the 20.

2) Can I switch a 120V AC coil or a 24V DC PLC input through this auxiliary block?

Yes to both. The LUA1C block is rated up to 250V AC and 250V DC at 5A, with a conventional free-air thermal current (Ith) of 2.5A, so a 120V AC pilot circuit or a 24V DC PLC input is well inside its range. Minimum switching voltage is 17V, so do not use it for dry-contact signals below that, such as 5V or 12V logic level inputs.

3) Is there a direct equivalent to the Square D LUA1C auxiliary contact block from another brand?

No. The LUA1C block is built for the TeSys U starter controller and carries compatibility code LUA1, installing into a designated location on the controller itself. Other brands' auxiliary contacts are tied to their own platforms: the ABB HK1-11 is a side-mount contact for MS116/132 manual motor starters, the Eaton XTPAXSA mounts to XT manual motor protectors, and the Eaton C320KG-SD is a top-mount contact for Freedom series NEMA devices. If the starter in the panel is a TeSys U, the LUA1C is the block that fits it.

4) Will the Square D LUA1C contact block work on a disconnect switch or a lighting contactor?

No. The LUA1C is a signaling contact block for TeSys U starter controllers, providing open/close (OF) and trip (SD) status. For a rotary disconnect, the ABB OA1G10 is a 1-NO auxiliary contact switch for OT/OS disconnects. For a lighting contactor, the ABB CR460XB2 is a 2-pole auxiliary contact block for 460 Line lighting contactors. Those are different mounting platforms entirely.

5) I need a 2 NO auxiliary contact but the starter is an Eaton, not a TeSys U. What do I use?

The Square D LUA1C20 variant gives 2 NO contacts but only mounts to a TeSys U controller. For Eaton equipment, the Eaton C320DPG20 auxiliary contact kit is a 2NO block rated 10A at 600V, and the Eaton ARA20 is a four-pole top deck adder with a 2NO configuration for AR/ARD machine tool relays. Match the block to the device family it is built for rather than to the contact count alone.

6) What does the SD contact on a TeSys U signaling block actually tell me?

SD is the trip signal. It changes state when the starter controller trips on a fault, so it is what you wire back to a panel light or PLC input for fault annunciation. The OF contact on the same block reports open/closed status and indicates the rotary knob is in the ready position. Together they let you distinguish a deliberate stop from a trip without opening the enclosure.

7) Does this Square D block meet IEC 60947-5-1 for control circuit devices?

The LUA1C block carries a rated insulation voltage (Ui) of 250V per CSA, UL and IEC 60947-5-1. That is the control-circuit device standard, which is what a spec reviewer on an industrial panel submittal is usually checking for on a signaling contact.

8) Is 5A at 250V enough, or do I need a higher rated auxiliary contact?

For pilot lights, PLC inputs and small relay coils, 5A at 250V AC/DC is plenty, and the 2.5A thermal rating is the figure to size continuous loads against. If you are switching a heavier interposing load and the auxiliary is going on a different contactor line, the Eaton 2NO auxiliary contact kit is rated 10A at 600V. That Eaton kit does not mount on TeSys U, so it is an alternative at the contactor level, not a drop-in swap.

9) How does the Square D LUA1C compare to the Eaton C320DPG20 on contact rating?

The LUA1C block is rated 5A at 250V AC/DC with screw clamp terminals and a 17V minimum switching voltage, which suits low-level signaling and PLC input circuits. The Eaton C320DPG20 auxiliary contact kit is rated 10A at 600V. The higher-voltage Eaton kit is the one to look at if the auxiliary circuit runs at line control voltage above 250V; the LUA1C covers 250V and below.

10) I need a 1 NO/1 NC auxiliary contact. What are my options besides the Square D LUA1C11?

The Square D LUA1C11 provides the 1 NO/1 NC configuration for TeSys U controllers. If the host device is an ABB MS116 or MS132 manual motor starter instead, the ABB HK1-11 is a side-mount auxiliary contact in the same 1NO/1NC arrangement. Pick based on which starter body the contact has to clip onto.

11) Is the ABB CR305X auxiliary contact a substitute for the Square D LUA1C?

No. The ABB CR305X Series auxiliary contact is made for ABB CR305X contactors and relays, while the LUA1C block drops into the designated accessory location on a TeSys U starter controller and carries compatibility code LUA1. The two use different mechanical interfaces, so neither will seat on the other's device.

12) How does the LUA1C block terminate, and can I land stranded control wire on it?

Termination is screw clamp, so standard stranded control wire lands directly under the clamp without a special tool or spring-cage technique. It is serviceable in the field, which matters when a signaling circuit gets re-pointed during commissioning.

13) Where is the Square D LUA1C auxiliary contact block made?

Country of origin is Czechia. That is the figure procurement teams need for country-of-origin declarations on government and institutional orders.

How fast can I get the Square D LUA1C11 delivered?

Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.

Can I return it if it doesn’t work for me?

Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.

Does the Square D LUA1C11 come with a warranty?

Absolutely. The Square D LUA1C11 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

How do I get technical support or installation help for the Square D LUA1C11?

You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us

Why buy the Square D LUA1C11 from ZenSupply?

ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

Square D TeSys Ultra Auxiliary Contact Block

Write a Review

Square D