Phoenix Contact ST 4-HESILED 24 (5X20) Fuse Terminal Block

Technical Overview

24V, 6.3A fuse terminal block with LED for 5x20mm fuses. Features spring-cage connection and DIN rail mounting. -60°C to 110°C operating range.

Key Features

Fuse modular terminal block for G / 5 x 20 glass/ceramic fuse inserts [1, 5, 11]
Spring-cage connection method for reliable and vibration-resistant wiring [1, 11, 13]
Nominal voltage of 24 V and nominal current of 6.3 A [1, 12]
Equipped with an LED status indicator for fuse monitoring (12 V AC/DC to 30 V AC/DC range) [8, 12]
Designed for DIN rail mounting (NS 35/7,5 or NS 35/15) [1, 11]
Supports conductor cross-sections from 0.08 mm² to 6 mm² [1, 2]
Compact design with test connections on both sides in the safety lever [15]
Insulating material PA with V0 flammability rating according to UL 94 [5, 12]
Compatible with CLIPLINE complete bridging, marking, and testing accessories [11]

Technical Specification Matrix

Parameter	Value
Nominal Voltage	24 V
Nominal Current	6.3 A
Fuse Type	G / 5 x 20 (Glass / Ceramics)
Connection Method	Spring-cage connection
Number of Levels	1
Number of Connections	2
Cross Section (flexible) max.	4 mm²
Cross Section (inflexible) max.	6 mm²
Wire Gauge Range	28 AWG to 10 AWG [9]
Mounting Type	DIN rail (NS 35/7,5, NS 35/15)
Color	Black (RAL 9005)
LED Voltage Range	12 V AC/DC ... 30 V AC/DC [8, 12]
LED Current Range	0.31 mA ... 0.95 mA [12]
Flammability Rating (UL 94)	V0 [5, 12]
Insulating Material	PA [5, 12]
Operating Temperature Range	-60 °C ... 110 °C [8]
Rated Surge Voltage	4 kV [12]
Degree of Pollution	3 [12]
Overvoltage Category	III [12]
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	7 x 0.62 x 6.15

Industrial Applications

1. Industrial Control Panel Circuit Protection

This fuse terminal block is ideal for protecting individual control circuits within industrial automation panels powered by 24V DC. Its compact design and DIN rail mounting save valuable space, while the integrated LED indicator provides immediate visual fault detection, simplifying maintenance.

Problem Solved

Prevents damage to sensitive control components from overcurrents and simplifies troubleshooting by quickly identifying blown fuses without complex measurements, reducing downtime.

24V DC6.3AOvercurrent ProtectionFault IndicationDIN RailSpring-cage ConnectionControl Panel

2. Machine Safety Circuit Interlock Protection

In machine safety applications utilizing 24V DC interlocking circuits, this fuse terminal block provides reliable overcurrent protection for critical safety components such as safety relays, emergency stop buttons, and sensor inputs. The LED visually confirms fuse integrity, which is crucial for maintaining operational safety.

Problem Solved

Ensures continuous operation and integrity of safety-critical components by protecting against electrical faults. The quick identification of fuse failures facilitates rapid repair, thereby minimizing machine downtime and enhancing worker safety.

24V DCSafety CircuitFuse ProtectionLED IndicatorMachine DowntimeTroubleshootingIndustrial Safety

3. Distributed I/O System Field Wiring Protection

For distributed I/O modules and field devices in demanding industrial environments, this terminal block offers robust protection for field wiring. Its construction, featuring a V0 flammability rating and a wide operating temperature range of -60°C to 110°C, ensures durability. Spring-cage connections provide excellent vibration resistance, maintaining stable connections.

Problem Solved

Protects valuable I/O modules and field sensors from short circuits or overloads, extending equipment lifespan and ensuring stable signal transmission in harsh conditions. The integrated LED allows for rapid identification of field wiring faults, improving system reliability.

24V6.3ADistributed I/OField DevicesOvercurrentShort-circuitVibration ResistanceWide Temperature RangeFault IndicationSpring-cage