Choosing the correct Schneider LC1D contactor coil voltage is essential when ordering or replacing a TeSys Deca contactor.
Two LC1D contactors can have the same current rating and look almost identical but have completely different control coil voltages.
For example:
LC1D18B7 = 18A contactor with a 24V AC coil
LC1D18BD = 18A contactor with a 24V DC coil
The small difference between B7 and BD is therefore extremely important.
This guide explains the most common Schneider LC1D coil codes and how to identify the correct contactor.
| Schneider Coil Code | Coil Voltage | Supply Type |
|---|---|---|
| B7 | 24V | AC 50/60Hz |
| BD | 24V | DC |
| E7 | 48V | AC 50/60Hz |
| ED | 48V | DC |
| F7 | 110V | AC 50/60Hz |
| FD | 110V | DC |
| M7 | 220V | AC 50/60Hz |
| P7 | 230V | AC 50/60Hz |
| U7 | 240V | AC 50/60Hz |
| Q7 | 380V | AC 50/60Hz |
| V7 | 400V | AC 50/60Hz |
| N7 | 415V | AC 50/60Hz |
| R7 | 440V | AC 50/60Hz |
These are some of the most commonly encountered coil codes. Other Schneider coil voltages and electronic wide-range coils are also available depending on the specific TeSys Deca contactor.
Schneider adds the coil-voltage code to the end of the base contactor part number.
For example:
LC1D18B7
can be broken down as:
LC1D – Schneider TeSys Deca contactor
18 – 18A contactor rating
B7 – 24V AC 50/60Hz coil
Similarly:
LC1D25F7
means:
LC1D contactor
25A rating
110V AC 50/60Hz coil
And:
LC1D32P7
means:
LC1D contactor
32A rating
230V AC 50/60Hz coil
This is one of the most important Schneider LC1D distinctions.
B7 = 24V AC 50/60Hz
Example:
LC1D18B7
This is an LC1D18 contactor with a 24V AC control coil.
BD = 24V DC
Example:
LC1D18BD
This is an LC1D18 contactor with a 24V DC control coil.
Although the two part numbers look very similar, the coil supply is completely different.
A B7 contactor should not be ordered as a replacement for a BD contactor simply because both say 24V.
Always establish whether the control circuit is AC or DC.
F7 = 110V AC 50/60Hz.
For example:
LC1D25F7
is a Schneider LC1D25 contactor fitted with a 110V AC coil.
110V AC control circuits are commonly found in industrial machinery and control panels.
P7 = 230V AC 50/60Hz.
For example:
LC1D32P7
is an LC1D32 contactor with a 230V AC coil.
This is one of the common coil voltages used in UK and European control systems.
U7 = 240V AC 50/60Hz.
Schneider distinguishes this from P7, although 230V and 240V systems exist within the same harmonised European voltage environment.
When replacing an existing contactor, the safest approach is to match the complete existing part number wherever possible.
V7 = 400V AC 50/60Hz.
For example:
LC1D18V7
is an 18A LC1D contactor fitted with a 400V AC coil.
This should not be confused with the main motor voltage.
The V7 suffix specifically identifies the control coil voltage.
N7 = 415V AC 50/60Hz.
An example would be:
LC1D25N7
which is an LC1D25 contactor with a 415V AC coil.
415V coil contactors are still commonly encountered in UK industrial installations.
Not necessarily.
This is one of the most common mistakes when selecting a contactor.
A motor may operate from a 400V three-phase supply, while the contactor coil may operate from:
24V AC
24V DC
110V AC
230V AC
240V AC
400V AC
415V AC
The motor supply and control circuit therefore need to be checked separately.
For example, a 400V three-phase motor controlled by a 24V AC control transformer might use an:
LC1D18B7
not an LC1D18V7.
The easiest method is to locate the complete Schneider part number on the existing contactor.
Look for a reference such as:
LC1D09B7
LC1D12BD
LC1D18F7
LC1D25P7
LC1D32U7
The final characters identify the coil version.
If the full part number cannot be read, check any separate voltage marking on the coil or side label.
If you are still unsure, send Western Automation a clear photograph showing:
Front of the contactor
Side label
Existing part number
Coil terminals or coil marking
and we can help identify the correct replacement.
LC1D09 – 9A contactor
B7 – 24V AC coil
LC1D12 – 12A contactor
BD – 24V DC coil
LC1D18 – 18A contactor
F7 – 110V AC coil
LC1D25 – 25A contactor
P7 – 230V AC coil
LC1D32 – 32A contactor
U7 – 240V AC coil
LC1D38 – 38A contactor
N7 – 415V AC coil
The same principle applies across many Schneider TeSys Deca contactors.
For conventional Schneider AC coil codes, the final 7 normally indicates a coil designed for 50/60Hz operation.
Examples include:
B7 – 24V AC 50/60Hz
F7 – 110V AC 50/60Hz
P7 – 230V AC 50/60Hz
U7 – 240V AC 50/60Hz
V7 – 400V AC 50/60Hz
N7 – 415V AC 50/60Hz
Older or less common Schneider contactors may also be encountered with suffixes ending in 5 or 6, relating to different frequency specifications.
For a replacement, matching the complete part number remains the safest approach.
On many conventional Schneider coil references, D indicates a DC coil.
Examples include:
BD = 24V DC
ED = 48V DC
FD = 110V DC
MD = 220V DC
This makes the distinction between B7 and BD particularly important.
Some newer Schneider TeSys contactors use electronic wide-range coils rather than one fixed coil voltage.
Examples used across applicable TeSys Deca contactors include:
| Electronic Coil Code | Typical Control Range |
|---|---|
| BNE | 24–60V AC/DC |
| EHE | 48–130V AC/DC |
| KUE | 100–250V AC/DC |
These wide-range coils can simplify stockholding because one contactor can cover several traditional control voltages.
Always check that the electronic coil option is available for the specific LC1D contactor frame being selected.
No, not simply because both are rated at 24V.
B7 is 24V AC.
BD is 24V DC.
The control supply type must match the contactor coil.
Using the wrong coil specification can result in the contactor failing to operate correctly or potentially being damaged.
P7 and U7 are different nominal coil codes:
P7 = 230V AC
U7 = 240V AC
Do not automatically substitute one for the other without checking Schneider's specification and the actual control supply.
When replacing an existing unit, matching the existing suffix is normally preferable.
V7 and N7 refer to different nominal voltage codes:
V7 = 400V AC
N7 = 415V AC
Schneider notes that equipment rated around European harmonised supply voltages may cover wider operating ranges, but replacement selection should still be based on the exact contactor specification and control voltage.
If the original contactor is N7, use the corresponding N7 replacement unless Schneider documentation confirms otherwise.
The contactor coil creates the magnetic field that pulls the contactor closed.
If the applied control voltage is wrong, the contactor may:
Fail to pull in
Chatter
Drop out
Run unusually hot
Fail prematurely
Damage the coil
For this reason, coil voltage is just as important as choosing the correct contactor current rating.
Western Automation supplies an extensive range of Schneider TeSys Deca LC1D contactors in common current ratings and coil voltages.
If you are replacing an existing contactor, send us:
The full Schneider part number
A photograph of the existing contactor
Motor kW
Motor full-load current
Control voltage
Whether the control supply is AC or DC
We can help identify the correct LC1D contactor, coil voltage, overload relay and compatible accessories.
For help selecting the correct contactor size, see our Schneider LC1D Contactor Selection Guide – Which LC1D do I need?
Schneider LRD Overload Selection Guide – Which LRD Fits My LC1D Contactor?
Oct 02 2026 | Guides and How-to