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Schneider Electric LUCB18B

Schneider LUCB18B TeSys Ultra Motor Protection, 15 kW

MPNLUCB18B
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Schneider Electric TeSys Ultra advanced control unit LUCB18B, manual reset, plug-in mount, 15 kW motor protection at 690 V.

$68.58 – $199.44Ref. price · indicative, final on quote
Schneider Electric LUCB18B 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

LUCB18B 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 voltage24 V AC
Voltage690 V IEC 60947-6-2 600 V UL 60947-4-1 600 V CSA C22.2 No 60947-4-1
Control circuit voltage limits20...26.5 V AC 24 V in operation 14.5 V AC 24 V drop-out
[Ue] rated operational voltage690 V AC
[Uimp] rated impulse withstand voltage6 kV IEC 60947-6-2
Typical current consumption220 mA 24 V AC I maximum while closing with LUB32 220 mA 24 V AC I maximum while closing with LUB38 90 mA 24 V AC I rms sealed with LUB32 90 mA 24 V AC I rms sealed with LUB38
Rated motor current adjustment range4.5...18 A
Motor power7.5 kW 400...440 V AC 50/60 Hz 9 kW 500 V AC 50/60 Hz 15 kW 690 V AC 50/60 Hz

All specifications

LUCB18B additional specifications
ParameterValue
Network frequency40...60 Hz
Phase failure sensitivityYes
Utilisation categoryAC-43 AC-44 AC-41
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 LUB32 control circuit 35 ms opening with LUB38 control circuit 70 ms closing with LUB32 control circuit 70 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 dissipation3 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 Protection against phase failure and phase imbalance Manual reset Earth fault protection
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 LUCB18B is a TeSys Ultra advanced control unit for motor control and protection, designed for 3-phase self-cooled motors up to 15 kW at 690 V AC. It provides overload and short-circuit protection, phase failure and imbalance detection, earth fault protection, and manual reset — all in a plug-in front-face package that mounts without tools. Rated for utilization categories AC-41, AC-43, and AC-44, with a thermal overload class 10 trip curve.

Dimensions are 2.6 in high, 1.8 in wide, and 2.4 in deep — compact enough for crowded panels. IP20 on the front face and wired terminals; IP40 on front when outside the connection zone. Plug-in front-face mounting means it clips onto a base without screws — swap in seconds during a line-down event.

Frequently asked questions

What are the physical dimensions of the LUCB18B?

The LUCB18B measures 2.6 in (66 mm) high, 1.8 in (45 mm) wide, and 2.4 in (60 mm) deep.

What standards does the LUCB18B comply with?

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

What protection functions does the LUCB18B offer?

Overload and short-circuit protection, phase failure and phase imbalance detection, and earth fault protection. It includes a manual reset and a class 10 thermal overload curve.

What is the tripping threshold of the LUCB18B?

The tripping threshold is 14.2 times the set current (Ir) with a ±20 % tolerance.

MPN
LUCB18B