Phoenix Contact UKK 3 Double-Level Terminal Block

Technical Overview

500V, 24A double-level terminal block with M3 screw connections, 0.2-4mm² wire range, and UL 94 V0 polyamide insulation. Operates -60°C to 110°C.

Key Features

Two-level construction allows two separate potentials per terminal position within a narrow 5.2 mm body.
Wide conductor acceptance range from 0.2 mm² to 4 mm² rigid (AWG 24-12) and 0.2 mm² to 2.5 mm² flexible (AWG 24-14).
M3 screw connection with 0.5 - 0.6 Nm tightening torque ensures secure wiring.
UL 94 V0 rated polyamide insulation for enhanced safety and performance in harsh environments.
Wide operating temperature range of -60°C to 110°C.
Compatible with NS 35/7.5, NS 35/15, and NS 32 DIN rails for versatile mounting.
Large-surface labeling option simplifies circuit identification.
Rail vehicle certified per DIN EN 45545-2.
Multiple international approvals including CSA, cULus, KEMA-KEUR, and EAC.

Technical Specification Matrix

Parameter	Value
Nominal Voltage	500 V
Nominal Current (with 2.5mm² conductor)	24 A
Max Load Current (with 4mm² conductor)	32 A
Rated Surge Voltage	6 kV
Connection Method	Screw connection (M3)
Tightening Torque	0.5 - 0.6 Nm
Stripping Length	8 mm
Nominal Cross Section	2.5 mm²
Conductor Range Rigid	0.2 - 4 mm² (AWG 24-12)
Conductor Range Flexible	0.2 - 2.5 mm² (AWG 24-14)
Mounting Type	DIN rail (NS 35/7.5, NS 35/15, NS 32)
Color	Gray (RAL 7042)
Insulating Material	PA (Polyamide), Group I
Flammability Rating	UL 94 V0
Operating Temperature	-60°C to 110°C
Approvals	CSA, IECEE CB Scheme, EAC, cULus Recognized, KEMA-KEUR, UL 94 V0, DIN EN 45545-2
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	6.2 x 0.52 x 5.6

Industrial Applications

1. Industrial Control Panels with High Density Wiring

In modern industrial control cabinets, space is a premium. This double-level terminal block allows for significant space savings by handling two independent circuits in the footprint of a single-level terminal block. This is critical in applications requiring many I/O points in a compact area.

Problem Solved

Solves the problem of limited panel space and high wire count by efficiently organizing two circuits per terminal point, reducing cabinet size and associated costs.

High density wiringSpace optimizationCompact designDIN rail mounting500V24A5.2mm width

2. Railway and Transportation Systems

Given its DIN EN 45545-2 certification for rail vehicles and a wide operating temperature range (-60°C to 110°C), this terminal block is ideal for electrical connections within railway rolling stock and infrastructure, where robust and fire-safe components are mandatory.

Problem Solved

Provides reliable, fire-resistant, and vibration-proof electrical connections in harsh and safety-critical railway environments, meeting stringent international standards.

Rail vehicle certifiedDIN EN 45545-2-60°C to 110°CVibration resistanceUL 94 V06kV surge voltage

3. Process Control Systems in Extreme Environments

The wide operating temperature range (-60°C to 110°C) and robust polyamide insulation with UL 94 V0 flammability rating make this terminal block suitable for process control applications in environments exposed to significant temperature fluctuations or where fire safety is paramount, such as in heavy industries or outdoor equipment enclosures.

Problem Solved

Ensures secure and safe electrical connections in extreme temperatures and high-risk environments, preventing system failures due to thermal stress or fire hazards.

-60°C to 110°CUL 94 V0Polyamide insulation500V24AScrew connectionIndustrial process control