Phoenix Contact UT 10 Feed-Through Terminal Block, 57 A

UT 10: 57 A feed-through block for 10 mm² cables

The UT 10 is the heavy-duty feed-through block of the mid UT range. It carries 57 A at 1000 V, takes conductors from 0.5 up to 16 mm² and has a nominal cross section of 10 mm². It is used where a panel receives thick supply cables or where a single block must carry the whole current of a sub-circuit.

In the type code UT means universal terminal and 10 is the nominal cross section in mm². The order number 3044160 refers to the gray version. Seven Star LLC supplies the UT 10 in Oman and the GCC as an independent supplier in Muscat.

Technical specifications of the UT 10

Current path and heat in the UT 10

At 57 A the current bar and clamp of the UT 10 must move more than ten times the energy of a signal terminal into the heat budget of the panel. The data sheet states 1.82 W power dissipation at nominal condition per block, so a row of ten fully loaded blocks adds about 18 W inside the cabinet. This is a number that should go into the thermal design, especially in hot installations.

The larger clamp opening is useful with stranded cable in 10 and 16 mm², where a crimped ferrule or lug gives the most secure joint. The M4 screw with 1.5 to 1.8 Nm torque is the same thread size as on the UT 6, so common tools are used for both.

Where the UT 10 fits in a terminal row

A UT 10 is usually chosen for distribution: incoming feeds to a control panel, outputs of a large power supply, main supply to a frequency drive, or battery and charger connections. A neighbouring UT 4 or UT 6 can then take the branch circuits so that the row follows the cable size down from the source.

For earth, the UT 10-PE has the same footprint, so the protective conductor can run next to the power blocks with the same layout.

Selection and ordering checklist for the UT 10

• Current of the circuit and cabinet temperature, with derating.
• Conductor size and whether a ferrule or lug is used.
• Whether 16 mm² is required (the UT 10 reaches it, the UT 6 does not).
• Rail type and row length.
• Bridges, covers and partition plates.
• Quantity in multiples of the packing unit.

Installation, commissioning and maintenance of the UT 10

Prepare the cable end with a ferrule for stranded wire, insert fully and tighten at 1.5 to 1.8 Nm. Do not exceed 16 mm². On a vertical rail keep the cable weight supported by clamps or trunking so that the terminal does not carry cable strain.

During maintenance, check joints on circuits that carry the largest and most variable load, and look at the colour of the housing for any heat marks. Replace a damaged block rather than repairing it.

Typical applications in Oman and the GCC

In Oman and the GCC the UT 10 appears in drive cabinets, UPS and battery panels, distribution boards for chiller and pump stations, and in supply rows of small switchboards. Cabinet temperatures in outdoor kiosks can climb well above the temperature of the surrounding air, so the heat contribution of 1.82 W per block should be checked.

Where marine or coastal humidity is present, the closed housing and tightened screw joint give a stable contact over years of service.

Practical design notes for the UT 10

A practical way to size a UT 10 row is to start from the heat budget. Ten blocks at the listed 1.82 W add about 18 W; thirty add about 55 W, which is the output of a small cabinet heater running in reverse. In a sealed enclosure in direct sun that heat decides whether a fan or a larger enclosure is needed, so add it to the losses of drives and supplies before you fix the enclosure size.

Plan the cable route as well. A 10 mm² cable is stiff, and the bend radius, the gland position and the distance to the terminal all decide whether the terminal is loaded by the cable weight. Leave enough free length to bend the conductor into the clamp without pulling on the block, and clip the cable to the rail or a support bar at the entry.

Comparison with neighbouring UT sizes

Information to send with an RFQ for the UT 10

• Full part number UT 10 and quantity in pieces (the page lists a packing unit of 50).
• Cable type and cross section.
• Ambient temperature at the cabinet.

Documents and quotation

Send us the part number UT 10 and the quantity you need, and we will confirm which official documents are available for this item. Seven Star LLC is an independent supplier in Muscat and quotes for projects across Oman and the GCC; we do not act on behalf of the manufacturer.

Please also tell us the delivery location and the project timeline so that availability can be checked before you commit to a schedule.