Technical Overview

The Phoenix Contact 3074172 (UT 4-HESILED 24 (5X20) GY) is a modular fuse terminal block designed specifically for G / 5 x 20 mm glass or ceramic cartridge fuses. Engineered for rugged industrial environments, it features the patented Reakdyn screw connection principle which provides a zero-maintenance, gas-tight, and highly vibration-resistant connection for conductors ranging from 0.14 mm² to 6 mm² (26 to 10 AWG). Rated for a nominal current of 6.3 A, it incorporates a built-in LED fault indicator (operating from 12 V to 30 V AC/DC) that drastically reduces troubleshooting time by immediately highlighting blown fuses. The block's lever-style disconnect ensures safe and straightforward fuse replacement, while standard plug-in bridges and NS 35 DIN rail snap-on capabilities allow for rapid, high-density control cabinet assembly.

Key Features

Accommodates G / 5 x 20 mm glass and ceramic cartridge fuses
Built-in 24V AC/DC LED indicator for instant blown-fuse diagnostics
Patented Reakdyn screw connection for maintenance-free, vibration-proof wiring
Accepts solid and flexible conductors from 0.14 mm² to 6 mm² (26-10 AWG)
Lever element provides a safe mechanical disconnect without exposing live parts
Snaps seamlessly onto standard NS 35/7.5 and NS 35/15 DIN rails

Technical Specification Matrix

Parameter	Value
Nominal Current	6.3 A
Nominal Voltage	24 V
Fuse Type	G / 5 x 20 mm (Glass / Ceramics)
Connection Method	Screw Connection
Conductor Cross Section	0.14 mm² to 6 mm² (26 - 10 AWG)
Indicator	24V LED (12 V - 30 V AC/DC)
Rated Surge Voltage	4 kV
Maximum Power Dissipation	1.6 W
Operating Temperature	-60 °C to 110 °C
Mounting Type	NS 35/7.5, NS 35/15

Industrial Applications

1. Industrial Control Panel Circuit Protection

Installed within main PLC enclosures to independently fuse 24V DC auxiliary power runs for sensitive discrete sensors and relays, fitting tightly onto standard NS 35 DIN rails in dense arrays.

Problem Solved

Prevents cascading electrical failures in complex automation networks and enables immediate visual identification of blown circuits via the active LED indicator, minimizing machine downtime.

24V DCNS 35 DIN Rail6.3A Nominal CurrentLED Fault Indicator

2. Vibration-Resistant Material Handling Systems

Protects solenoid valves and low-voltage actuators in continuously moving automated conveyor lines where mechanical vibration typically jeopardizes standard electrical connections.

Problem Solved

Maintains continuous, gas-tight electrical contact without requiring periodic retightening, preventing uncommanded line stops caused by loosened terminal connections.

Reakdyn PrincipleScrew ConnectionVibration-Resistant0.14 to 6 mm² Cross Section

3. Process Instrumentation Loop Disconnect

Acts as an easily serviceable inline disconnect and protection layer for 24V transmitters and analytical instruments operating in demanding chemical or high-temperature manufacturing sectors.

Problem Solved

Provides operators with a safe, isolated lever-type disconnect to swap out protective 5x20mm fuses without specialized tools or dangerous exposure to live busbars.

Lever-Type DisconnectG / 5 x 20 mm FuseOvervoltage Category III-60 °C to 110 °C

Phoenix Contact UT 4-HESILED 24 (5X20) GY Fuse Block

Phoenix Contact UT 4-HESILED 24 (5X20) GY Fuse Block

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Industrial Control Panel Circuit Protection

2. Vibration-Resistant Material Handling Systems

3. Process Instrumentation Loop Disconnect