What is the difference between an LUB12/32 & LUB120/320 & LUB38/380 Tesys U starter?

The Tesys U non reversing starter controller offers three types of power base units in its range

LUB12 & LUB120 (0 – 12A, 5.5kw at 400V)
LUB32 & LUB320 (0 – 32A, 15kW at 400V)
LUB38 & LUB380 (0 - 38A, 18.5kW at 400V)

LUB12/120 & LUB32/320 power bases have gone through an evolutionary change.

Pre 2010 wk 36, the base unit was coloured black\white & the contact block LU9BN11 was removable.

Post 2010 wk 36, the base unit is black, to denote power & the contact block LU9BN11 is now fixed.

Note:
The LUB38 & LUB380 were added to the range post colour change.

LUB120, LUB320 & LUB380 will always be delivered with all slots empty (removable plastic covers) which will enable the customer to select their own contact\communication arrangements. Therefore, part No.: LU9BN11 is compatible

Part No.: LU9BN11:

Is a contact block comprising of, 1NO (13-14) & 1NC (21-22), which indicate the state of the main poles

Note:
Although, some customers are familiar with the model U bases with plug in units. It is worth a reminder that, the new pre wired contacts in the LUB12, LUB32 & LUB38 are fixed & are not meant for removal.

If they are removed (with some effort) it will render the base unit inoperable & a new one will have to be purchased.