3216053

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The Phoenix Contact 3216053, also designated UKKB 5 BU, is a blue double-level terminal block designed for compact conductor distribution in industrial control panels and electrical enclosures. Its two-level configuration provides four screw connections within a space-saving 6.2 mm-wide housing, helping increase wiring density while keeping circuits organized and clearly identified.

This DIN rail-mounted terminal block accepts solid or flexible conductors from 0.2 to 4 mm² (AWG 24 to 12) and has a nominal rating of 32 A at 500 V. It mounts on NS 32, NS 35/7.5, or NS 35/15 rails and features a durable PA insulating body with a UL 94 V-0 flammability rating. Integrated marker grooves and compatibility with bridges, end covers, partition plates, test accessories, and terminal markers support flexible panel assembly.
Specification Description
Manufacturer Phoenix Contact
Part Number 3216053
Product Designation UKKB 5 BU
Product Type Double-Level Terminal Block
Connection Method Screw Connection
Number of Levels 2
Number of Connections 4
Nominal Cross Section 4 mm²
Conductor Cross-Section Range 0.2–4 mm²
Conductor Size Range AWG 24–12
Nominal Current 32 A
Maximum Load Current 32 A with a 4 mm² conductor
Nominal Voltage 500 V
Rated Surge Voltage 6 kV
Width 6.2 mm
Length 67 mm
Height on NS 35/7.5 Rail 62 mm
Height on NS 35/15 Rail 69.5 mm
Height on NS 32 Rail 67 mm
Mounting Type NS 35/7.5, NS 35/15, or NS 32 DIN rail
Color Blue
Insulating Material Polyamide (PA)
Flammability Rating UL 94 V-0
Screw Thread M3
Stripping Length 8 mm
Tightening Torque 0.6–0.8 Nm
Operating Temperature -60°C to 85°C
Degree of Pollution 3
Overvoltage Category III
Applicable Standard IEC 60947-7-1
Weight 16.55 g per piece, excluding packaging
Country of Origin Poland
GTIN 4046356074483

What type of terminal block is this?

It is a blue, double-level DIN rail terminal block designed to provide two separate connection levels within a compact control panel footprint. It uses screw-clamp connections and has four connection points.

What is the nominal current and voltage rating?

Under IEC ratings, the terminal block has a nominal current of 32 A and a nominal voltage of 500 V. Applicable ratings may differ according to the approval standard and installation conditions.

Which conductor sizes can be connected?

The connection range for solid and flexible conductors is 0.2 mm² to 4 mm², equivalent to AWG 24 to AWG 12. Flexible conductors fitted with ferrules and plastic sleeves can range from 0.25 mm² to 2.5 mm².

What type of electrical connection does it use?

Phoenix Contact 3216053 uses M3 screw connections. This established connection method provides secure conductor clamping for industrial control cabinets, distribution panels, and machine wiring.

What stripping length and tightening torque are required?

The specified conductor stripping length is 8 mm. The M3 terminal screws should be tightened to between 0.6 Nm and 0.8 Nm.

Which DIN rails are compatible with this terminal block?

The terminal block can be mounted on NS 35/7.5, NS 35/15, and NS 32 rails. These include standard 35 mm DIN rail profiles and the 32 mm G-profile rail.

What are the terminal block dimensions?

The unit is 6.2 mm wide and 67 mm long. Its installed height is 62 mm on an NS 35/7.5 rail, 69.5 mm on an NS 35/15 rail, and 67 mm on an NS 32 rail.

How many levels and connection points does it provide?

It provides two levels and four connection points. This double-level arrangement helps increase wiring density without requiring additional DIN rail length.

What is the operating temperature range?

The specified ambient operating temperature range is -60°C to 85°C. Assembly and conductor actuation are specified for ambient temperatures from -5°C to 70°C.

What insulation material is used?

The housing is made from polyamide insulating material and has a UL 94 V-0 flammability classification. The terminal block is blue for straightforward circuit identification within an enclosure.

Can two conductors be connected to the same terminal point?

Yes. Two conductors of the same cross-section can be connected within the specified limits. Solid or stranded conductors may range from 0.2 mm² to 1.5 mm², while compatible twin-ferrule arrangements range from 0.5 mm² to 1.5 mm².

Which accessories can be used with this terminal block?

Compatible accessory categories include end covers, spacer and partition plates, end clamps, insertion bridges, fixed bridges, jumpers, test plugs, test sockets, and terminal markers. Accessory selection should match the 6.2 mm terminal width and the intended rail arrangement.

What insertion bridges are compatible?

Compatible options include the EB 2-6 two-position bridge, EB 3-6 three-position bridge, and EB 10-6 ten-position bridge. These have a 6.2 mm pitch and can be used to create common electrical connections between adjacent terminals.

What applications is this terminal block suited to?

It is commonly suited to compact industrial panel wiring, control cabinet connections, signal distribution, machine wiring, and other installations where two independent circuits must be arranged vertically to conserve rail space.

Does it provide space for circuit identification?

Yes. The design includes a large labeling area and accepts compatible 6 mm terminal marking systems, including blank, preprinted, and custom-labeled marker strips.

Which connection standard applies to this terminal block?

The terminal block is designed in accordance with IEC 60947-7-1. It also carries multiple international approvals, although the permitted current, voltage, and conductor range can vary between approval systems.

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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