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Schneider Electric LUCB12ES

Schneider LUCB12ES TeSys Ultra Control Unit, AC-43 Motor Pro

MPNLUCB12ES
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Schneider Electric TeSys Ultra LUCB12ES advanced control unit, AC-43 motor protection, 5.5 kW at 400 V, manual reset, 48 V AC / 48-72 V DC control.

$69.85 – $162.59Ref. price · indicative, final on quote
Schneider Electric LUCB12ES datasheet (PDF)
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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

LUCB12ES key specifications
ParameterValue
Load type3-phase motor self-cooled
Range of productTeSys Ultra
Product or component typeAdvanced control unit
Immunity to voltage dips70 % / 500 ms IEC 61000-4-11
Coil voltage48 V AC 48...72 V DC
Voltage690 V IEC 60947-6-2 600 V UL 60947-4-1 600 V CSA C22.2 No 60947-4-1
Control circuit voltage limits38.5...72 V AC 48 V in operation 38.5...93 V DC 48...72 V in operation 29 V AC 48 V drop-out 29 V DC 48...72 V drop-out
[Ue] rated operational voltage690 V AC
[Uimp] rated impulse withstand voltage6 kV IEC 60947-6-2
Typical current consumption280 mA 48 V AC I maximum while closing with LUB12 280 mA 48 V AC I maximum while closing with LUB32 280 mA 48 V AC I maximum while closing with LUB38 280 mA 48...72 V DC I maximum while closing with LUB12 280 mA 48...72 V DC I maximum while closing with LUB32 280 mA 48...72 V DC I maximum while closing with LUB38 35 mA 48 V AC I rms sealed with LUB12 45 mA 48 V AC I rms sealed with LUB32 45 mA 48 V AC I rms sealed with LUB38 35 mA 48...72 V DC I rms sealed with LUB12 45 mA 48...72 V DC I rms sealed with LUB32 45 mA 48...72 V DC I rms sealed with LUB38
Rated motor current adjustment range3...12 A
Motor power5.5 kW 400...440 V AC 50/60 Hz 5.5 kW 500 V AC 50/60 Hz 9 kW 690 V AC 50/60 Hz

All specifications

LUCB12ES additional specifications
ParameterValue
Network frequency40...60 Hz
Phase failure sensitivityYes
Utilisation categoryAC-43 AC-41 AC-44
IP degree of protectionIP20 front panel and wired terminals IEC 60947-1 IP20 other faces IEC 60947-1 IP40 front panel outside connection zone IEC 60947-1
Shock resistance10 gn power poles open IEC 60068-2-27 15 gn power poles closed IEC 60068-2-27
Operating altitude6561.68 ft (2000 m)
Vibration resistance2 gn 5...300 Hz power poles open IEC 60068-2-6 4 gn 5...300 Hz power poles closed IEC 60068-2-6
Non-dissipating shock wave1 kV serial mode IEC 60947-6-2 2 kV common mode IEC 60947-6-2
Depth2.4 in (60 mm)
Width1.8 in (45 mm)
Height2.6 in (66 mm)
StandardsEN 60947-6-2 IEC 60947-6-2 UL 60947-4-1, with phase barrier CSA C22.2 No 60947-4-1, with phase barrier
RangeTeSys
ResetManual reset
CategoryUS10I1122397
Fixing modePlug-in (front face)
Operating time35 ms opening with LUB12 control circuit 35 ms opening with LUB32 control circuit 35 ms opening with LUB38 control circuit 60 ms closing with LUB12 control circuit 60 ms closing with LUB32 control circuit 60 ms closing with LUB38 control circuit
Fire resistance1760 °F (960 °C) parts supporting live components IEC 60695-2-12 1202 °F (650 °C) IEC 60695-2-12
Heat dissipation2 W control circuit with LUB12 3 W control circuit with LUB32 3 W control circuit with LUB38
Device short nameLUCB
Compatibility codeLUCB
Device applicationMotor control Motor protection
Tripping threshold14.2 x Ir +/- 20 %
Protective treatmentTH IEC 60068
Thermal overload classClass 10 40...60 Hz -13...158 °F (-25...70 °C) IEC 60947-6-2 Class 10 40...60 Hz -13...158 °F (-25...70 °C) UL 508
Immunity to microbreaks3 ms
Main function availableProtection against overload and short-circuit Earth fault protection Protection against phase failure and phase imbalance Manual reset
Safe separation of circuit400 V SELV between the control and auxiliary circuits IEC 60947-1 400 V SELV between the control or auxiliary circuit and the main circuit IEC 60947-1
Product specific applicationBasic protection and advanced functions, communication
Resistance to fast transients2 kV 3 serial link IEC 61000-4-4 4 kV 4 all circuits except for serial link IEC 61000-4-4
Resistance to radiated fields9.1 V/m (10 V/m) 3 IEC 61000-4-3
Immunity to radioelectric fields10 V IEC 61000-4-6
Ambient air temperature for storage-40...185 °F (-40...85 °C)
Ambient air temperature for operation-13...158 °F (-25...70 °C)
Resistance to electrostatic discharge8 kV 3 in open air IEC 61000-4-2 8 kV 4 on contact IEC 61000-4-2

Product details

The Schneider LUCB12ES advanced control unit from the TeSys Ultra series handles motor protection for three-phase self-cooled motors — covering overload, short-circuit, earth fault, and phase failure or imbalance. It carries a manual reset, which is typical in applications where automatic restart after a fault is not permitted. Rated for AC-43, AC-41, and AC-44 utilisation categories, it suits motor switching duty, with opening times of 35 ms and closing times of 60 ms when paired with a LUB12, LUB32, or LUB38 control circuit. Motor power capability reaches 5.5 kW at 400 V, 5.5 kW at 500 V, and 9 kW at 690 V.

AC-43 governs duty, with Class 10 thermal overload per IEC 60947-6-2 and UL 508, tripping threshold 14.2 × Ir ± 20 %, and phase failure sensitivity.

The unit mounts plug-in on the front face, with IP20 front panel and wired terminals and IP40 front panel outside the connection zone; dimensions are 66 mm high × 45 mm wide × 60 mm deep. Control voltage is 48 V AC or 48–72 V DC; sealed current draw ranges from 35 mA to 45 mA depending on the control circuit variant, and heat dissipation is 2–3 W.

Frequently asked questions

What compliance standards does the LUCB12ES meet?

It complies with EN 60947-6-2, IEC 60947-6-2, UL 60947-4-1, and CSA C22.2 No 60947-4-1 (with phase barrier).

What are the key ratings of the LUCB12ES?

It is an AC-43 advanced control unit rated for motor protection (overload, short-circuit, earth fault, phase failure). It handles up to 5.5 kW at 400 V, has manual reset, and operates with a 48 V AC or 48–72 V DC control circuit. The tripping threshold is 14.2 × Ir ± 20 %, and it offers IP20/IP40 protection.

MPN
LUCB12ES