Phoenix Contact UT 2,5-HESI-EX (5X20) Fuse Terminal Block

Technical Overview

1-level fuse modular terminal block with 2.5mm² screw connection, 5x20mm fuse, UL 94 V0, and -60°C to 110°C operating temperature.

Key Features

Fuse type: Glass/ceramic, size 5 x 20 mm
Screw connection for reliable wiring
Nominal cross-section: 2.5 mm² (AWG 26-14)
Mounting on NS 35/7,5 and NS 35/15 DIN rails
Operating temperature range: -60 °C to 110 °C (including self-heating)
Flammability rating: UL 94 V0
Color: Black (RAL 9005)
Suitable for Ex applications (UKCA-EX, ATEX, IECEx certified)
Rated Voltage: 275V
Number of levels: 1

Technical Specification Matrix

Parameter	Value
Flammability Rating	UL 94 V0
Insulating Material	PA
Operating Temperature Range	-60 °C to 110 °C
Fuse Type	Glass / Ceramics (5 x 20 mm)
Nominal Conductor Cross Section	2.5 mm²
AWG Conductor Cross Section (flexible)	26 - 14
Number of Connections	2
Rated Voltage	275V
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	7.56 x 0.62 x 5.78

Industrial Applications

1. Overcurrent Protection in Explosive Atmospheres

This fuse modular terminal block is ideal for integrating into control panels located in potentially explosive atmospheres, such as chemical plants or oil and gas facilities. Its ATEX/IECEx compliance and wide -60°C to 110°C operating range ensure safe and reliable circuit protection under harsh, hazardous conditions.

Problem Solved

Prevents overcurrent damage and eliminates potential ignition sources in hazardous locations, thereby protecting critical equipment and personnel in explosive environments.

ATEXIECExHazardous LocationOvercurrent ProtectionCircuit SafetyDIN Rail Mounting-60°C to 110°C275V

2. Compact Fuse Protection for Industrial Machinery

The compact 6.2mm width and 2.5mm² conductor capacity of this terminal block make it highly suitable for space-constrained industrial machine control cabinets. It provides essential fused protection for individual circuits, ensuring operational safety and enabling quick fault isolation within complex machinery.

Problem Solved

Protects sensitive control components from short circuits and overloads in industrial machinery, minimizing downtime and simplifying maintenance through easily replaceable 5x20mm fuses.

Machine ControlCircuit Protection2.5mm² Conductor5x20mm FuseScrew ConnectionDIN RailCompact Design

3. Robust Power Distribution for Remote Instrumentation Enclosures

In remote instrumentation enclosures, which are often exposed to wide temperature fluctuations, this terminal block can be effectively used for fused power distribution to sensors and actuators. Its broad operating temperature range (-60°C to 110°C) and robust PA material ensure long-term reliability in challenging environmental conditions.

Problem Solved

Provides reliable and protected power distribution for remote field devices, ensuring continuous operation of critical instrumentation by isolating faults and enabling quick fuse replacement in demanding outdoor or industrial environments.

Remote MonitoringInstrumentationPower DistributionFuse ProtectionWide Temperature Range-60°C to 110°CIndustrial Environments