Phoenix Contact PT 4-HESI (5X20) Fuse Terminal Block

Technical Overview

500V, 6.3A fuse terminal block for 5x20mm fuses. Features Push-in connection for 24-10 AWG conductors on DIN rail. Operates -60°C to +85°C.

Key Features

Push-in connection technology for tool-free and easy wiring of conductors.
Designed for 5x20mm cartridge fuses, ensuring precise circuit protection.
Compact design and front connection enable efficient wiring in confined spaces.
Part of the CLIPLINE complete system, offering standardized accessories.
Supports a wide wire range from 24 AWG to 10 AWG.
DIN rail mountable on NS 35/7.5 or NS 35/15 rails.
Rated surge voltage of 6 kV for enhanced protection against voltage spikes.
Operating temperature range from -60 °C to +85 °C for diverse environments.
Black (RAL 9005) color with UL 94 V0 flammability rating.
Tested and suitable for railway applications.

Technical Specification Matrix

Parameter	Value
Number of Positions	1 (for fuse) / 2 (connections)
Fuse Type	G / 5 x 20 Glass / Ceramics
Nominal Voltage	500 V (IEC), 300 V (UL)
Nominal Current	6.3 A
Wire Size (AWG)	24 AWG - 10 AWG
Conductor Cross Section (rigid)	0.2 mm² - 6 mm²
Conductor Cross Section (flexible with ferrule)	0.2 mm² - 4 mm²
Connection Method	Push-in
Mounting Type	DIN rail (NS 35/7,5, NS 35/15)
Operating Temperature Range	-60 °C to +85 °C
Flammability Rating	UL 94 V0
Rated Surge Voltage	6 kV
Insulating Material	PA (Polyamide)
Color	Black (RAL 9005)
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	6.34 x 0.62 x 5.59

Industrial Applications

1. Industrial Control Panel Circuit Protection

This fuse terminal block provides reliable overcurrent protection for individual circuits within industrial control panels, motor control centers, and automation systems. Its compact dimensions and Push-in connection technology enable quick, tool-free installation and efficient use of cabinet space, ensuring safety and reducing assembly time for systems up to 500V and 6.3A.

Problem Solved

Offers compact and secure overcurrent protection for critical circuits, preventing damage to downstream equipment from faults while simplifying wiring and minimizing cabinet footprint. The Push-in connection speeds up initial installation and subsequent maintenance.

Overcurrent protectionControl panelIndustrial automationDIN railPush-in connection500V6.3A5x20mm fuseCompact

2. Railway Signaling and Rolling Stock Systems

Designed for demanding railway applications, this fuse modular terminal block is suitable for use in signaling infrastructure, onboard rolling stock, and trackside equipment. Its broad operating temperature range of -60°C to +85°C and high surge voltage rating of 6 kV ensure robust circuit protection in harsh environments characterized by vibration, extreme temperatures, and electrical transients.

Problem Solved

Ensures stable and safe operation of railway electrical systems by providing reliable fuse protection under severe environmental conditions. The lever-type fuse holder facilitates quick and easy fuse replacement, critical for maintaining operational continuity and safety in railway operations.

Railway applicationsRolling stockSignalingCircuit protectionHarsh environment-60°C to +85°C6kV surgeDIN railFuse replacement

3. Machine Building for Sensor and Actuator Protection

In machine building and plant engineering, this terminal block provides essential protection for sensitive sensor and actuator circuits, as well as small motors and control signals. Its narrow width (6.2 mm) and Push-in connection method streamline assembly processes, allowing for faster wiring and easier troubleshooting in complex machinery with limited installation space.

Problem Solved

Offers efficient and space-saving fusing for critical low-power circuits in industrial machinery, safeguarding delicate components from overcurrents. The tool-free Push-in connection accelerates initial machine assembly and simplifies maintenance, reducing downtime for fuse replacement.

Machine buildingPlant engineeringSensor protectionActuator protectionCompact designPush-in connection500V6.3ADIN railQuick wiring