How to Choose a Replacement for an LC1D4011 Contactor Without Downtime

The LC1D4011 is a Telemecanique TeSys D contactor: 3-pole, AC coil, with one normally open and one normally closed auxiliary contact. The BRAH Electric replacement is the BLC1D4011, and every coil-voltage version has its own listing under the same suffix, so an LC1D4011-B7 with a 24VAC coil is replaced by a BLC1D4011-B7. The way to keep the outage short is to order by the full nameplate number, coil code included, and to settle the coil, overload relay and auxiliary contact questions before the panel is opened.

Below are all of the LC1D4011 versions in the BRAH catalogue with coil voltage and catalogue ratings, the LX1D6 coil that pairs with each one, and the overload relays, auxiliary contact blocks and interlock listed for the LC1D40.

LC1D4011 replacement at a glance

• The BRAH part number is the Telemecanique number with a B in front: LC1D4011-G7 becomes BLC1D4011-G7.
• The catalogue holds 18 listings for the LC1D40 and LC1D4011. Each one is 3-pole, 600V, with a catalogue rating of 60A and 30HP and a 1 NO / 1 NC auxiliary contact.
• Coil voltages run from 24VAC to 480VAC. The letter and digit after the dash identify the coil, and they are the part of the number most often left off an order.
• A failed coil can be changed without replacing the contactor. The LX1D6 coils are listed separately.
• DC control circuits use the LP1D40 instead, and reversing duty uses the LC2D40. Both are in the catalogue under replacement contactors.

LC1D4011 versions and their BRAH replacements

Find the number printed on the contactor in the first column. The last column is the separate replacement coil carrying the same code, for the case where the contactor is sound and only the coil has burnt out.

The 60A and 30HP figures are the catalogue values for the BRAH part. Do not read 60A as the motor current the contactor will switch, and do not work a rating out of the digits in the part number. Compare the replacement with the rating plate of the contactor coming out and with the motor nameplate. Horsepower also depends on supply voltage, so check it against the motor.

Reading the coil code on an LC1D4011

The code after the dash, such as B7, G6 or U7, belongs to the coil. The letters go with the voltage and the digit goes with the frequency. In the LX1D6 coil listings a code ending in 5 is a 50Hz coil, one ending in 6 is a 60Hz coil, and one ending in 7 is a 50/60Hz coil. That is why some voltages appear twice in the table, for example B6 and B7 at 24VAC or U6 and U7 at 240VAC: the contactors are the same and the coils differ in frequency.

The LC1D40 and LC1D4011 listings without a code are supplied with a 110/120VAC coil. If the number on your contactor has a code, order the listing with that code. If the label is worn, read the voltage and frequency printed on the coil itself and confirm them against the control circuit drawing. A coil on the wrong voltage either fails to pull the contactor in or overheats.

DC-coil and reversing versions of the same size

Two close relatives of the LC1D4011 are easy to confuse with it. The LP1D40 is listed as a DC rated contactor with a DC control coil and a single normally open auxiliary contact. The LC2D40 is listed as a reversing contactor. Neither is a drop-in for an LC1D4011, so check the first four characters of the nameplate number before ordering.

The LC2D40 is listed in 13 coil versions from 24VAC to 480VAC. To see them all, use the site search for LC2D40. For anything not in the table, call (855) 355-2724 with the part number.

Coils, overload relays and auxiliary contacts listed for the LC1D40

A contactor rarely fails alone. The coil, the overload relay under it and the auxiliary blocks clipped to it are separate catalogue items, and each can be ordered with the contactor so the job is done in one visit. Browse the full lists under magnetic coils, overload relays, auxiliary contacts and mechanical interlocks.

Pick the overload relay by the motor full-load current, which must fall inside the relay’s adjustment range. The steps for matching a relay to a TeSys D contactor are set out in the guide to pairing an LC1D5011 with its overload relay, and the same method applies here. For other sizes in the family, see the LC1D cross-reference guide.

How to keep the changeover short

Most of the lost time in a contactor change comes from finding out, with the panel open, that the part on the bench is the wrong one. These steps move that discovery to before the shutdown.

• Record the nameplate now. Photograph the contactor label and the coil label while the machine is running normally, and file the full number with the equipment record.
• Order the exact listing. Use the table above. In-stock orders placed before 3:00 PM Pacific ship the same business day, so an order placed in the morning leaves that day.
• Hold a spare for critical drives. One contactor, or one LX1D6 coil, on the shelf covers the most likely failures on a motor that cannot wait for a delivery.
• Label before you disconnect. Mark the line, load, coil and auxiliary wires and photograph the terminals. Reconnect the new contactor wire for wire.
• Move the add-on blocks across. Check any top-mount or side-mount auxiliary block for burnt or loose contacts before reusing it, and replace it if in doubt.
• Test before handing back. With the load isolated, energize the control circuit and confirm the contactor pulls in and drops out cleanly. Then run the motor and listen for chatter or hum and check for heat at the terminals.

Before you order: what to check on an LC1D4011

• The first four characters. LC1D is the AC-coil contactor this guide covers. LP1D is the DC-coil version and LC2D is the reversing version.
• The coil code. Voltage and frequency both matter. B6 and B7 are both 24VAC, and the frequency is what separates them.
• The control voltage. Measure or read it from the drawing. Do not assume it equals the motor supply voltage.
• Auxiliary contacts in use. The replacement is listed with 1 NO / 1 NC. Count any extra contacts provided by add-on blocks and make sure those blocks are serviceable or on the order.
• The load. Compare motor nameplate current and horsepower with the catalogue values and with the old contactor’s rating plate.
• The overload relay. If it stays, check its setting against the motor full-load current. If it goes, choose the range that contains that current.
• Terminals and mounting. Compare the installed unit with the photos and dimensions on the product page, and call if anything differs.

BRAH Electric is an aftermarket manufacturer, not an authorized Telemecanique or Schneider Electric distributor. Its parts are designed in-house and tested at its facility in Carlsbad, California, and the contactors carry a 2-year warranty from the date of invoice. Help with a part number is available on (855) 355-2724, Monday to Friday, 6AM to 5PM Pacific.

Safety when changing a TeSys D contactor

An LC1D4011 has two sources of energy: the motor supply on the power terminals and the control supply on the coil, which often comes from a separate transformer or panel. Isolate both, apply lockout/tagout, and prove the terminals dead with a tester before touching them. Only qualified personnel should do the work.

LC1D4011 replacement FAQs

What replaces a Telemecanique LC1D4011?

The BRAH Electric BLC1D4011 is listed as a direct substitute. Versions with a coil code are replaced by the BRAH listing with the same code, for example LC1D4011-U7 by BLC1D4011-U7.

Is the BLC1D4011 made by Telemecanique?

No. It is an aftermarket part made by BRAH Electric, which is not an authorized distributor of the original brand. The catalogue lists it as a direct substitute for the LC1D4011, and it carries a 2-year warranty from the date of invoice.

What is the difference between LC1D4011-G6 and LC1D4011-G7?

Both are listed with a 110/120VAC coil. In the matching coil listings, G6 is a 120VAC 60Hz coil and G7 is a 120VAC 50/60Hz coil. Order the code printed on your contactor.

Can I replace only the coil on an LC1D4011?

Yes, if the contacts and the frame are in good condition. The LX1D6 coils are listed for the LC1D40 in the same voltage codes. Match the code on the old coil.

Which overload relay goes with an LC1D4011?

The catalogue lists the BLR2D3353, adjustable from 23A to 32A, and the BLR2D3355, adjustable from 30A to 40A, for the LC1D40. Choose the one whose range contains the motor full-load current.

How long does it take to get a replacement?

In-stock orders placed before 3:00 PM Pacific ship the same business day, and shipping is calculated at checkout. Call (855) 355-2724 to confirm availability for an urgent job.

References

• IEC 60947-4-1, Low-voltage switchgear and controlgear, Part 4-1: electromechanical contactors and motor-starters. The international standard covering contactor ratings and utilization categories.
• OSHA 29 CFR 1910.147, The control of hazardous energy (lockout/tagout).
• OSHA 29 CFR 1910.333, Selection and use of work practices, including de-energizing and verifying electrical equipment before work.
• NFPA 70E, Standard for Electrical Safety in the Workplace.