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Schneider Electric LUCB32B

Schneider LUCB32B TeSys Ultra Control Unit, 24V AC

MPNLUCB32B
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Schneider Electric TeSys Ultra series, advanced control unit LUCB32B, 24 V AC, manual reset, AC-43/41/44 utilization.

$102.87 – $189.53Ref. price · indicative, final on quote
Schneider Electric LUCB32B 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

LUCB32B 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 range8...32 A
Motor power15 kW 400...440 V AC 50/60 Hz 15 kW 500 V AC 50/60 Hz 18.5 kW 690 V AC 50/60 Hz

All specifications

LUCB32B 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 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 phase failure and phase imbalance Earth fault protection Manual reset Protection against overload and short-circuit
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 LUCB32B is an advanced control unit in the TeSys Ultra range, handling basic protection and advanced functions including phase-failure, earth fault, overload, and short-circuit protection. It is plug-in mounted on the front face of a TeSys Ultra contactor base, with manual reset after a trip. Control voltage is 24 V AC, and the unit is rated for AC-43, AC-41, and AC-44 utilization categories — covering high-inertia loads, frequent starting, and general motor duty.

Thermal protection and coordination

Thermal overload class is Class 10 per IEC 60947-6-2 and UL 508. The tripping threshold is 14.2 × Ir ±20 %.

Mounts flush on the contactor face; panel cutout is already defined by the TeSys Ultra base unit. The front face is IP20 with wired terminals, so it is safe to touch in a panel with the door open. Other faces are IP20, but the front panel outside the connection zone is IP40 — enough for moderate dust. Dimensions are 2.6 × 1.8 × 2.4 in (66 × 45 × 60 mm) and fit within the contactor's envelope — no extra DIN rail space needed.

Frequently asked questions

What is the LUCB32B's depth?

Depth is 2.4 in (60 mm), measured from the front mounting face. This sits flush with the contactor base envelope.

What is the product range of the LUCB32B?

It is part of the TeSys range, specifically the TeSys Ultra series. This is the advanced control unit family for motor protection.

What compliance standards does the LUCB32B meet?

It is certified to 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).

MPN
LUCB32B