Phoenix Contact TB 4-HESILA 250 (5X20) I Fuse Terminal Block

Technical Overview

Fuse terminal block with 110-250V AC/DC LED indicator, 6.3A, 500V, G/5x20 fuse, screw connection, DIN rail mount.

Key Features

Equipped with an LED display for 110-250 V AC/DC to indicate fuse status.
Utilizes reliable screw connection technology for secure and robust wiring.
Designed to accept G / 5 x 20 type fuses for circuit protection.
Suitable for mounting on NS 35/7,5, NS 35/15, and NS 32 DIN rails.
Constructed from high-quality PA insulating material with a UL 94 V0 flammability rating.
Offers a wide operating temperature range from -60 °C to 110 °C.
Compact design with a width of 8.2 mm for space-saving installations.

Technical Specification Matrix

Parameter	Value
Product Type	Fuse Terminal Block
Number of Positions	1
Nominal Voltage UN	500 V
Nominal Current IN	6.3 A
Rated Surge Voltage	6 kV
LED Voltage Range	110 V AC/DC ... 250 V AC/DC
Fuse Type	G / 5 x 20
Connection Method	Screw Connection
Rated Cross Section	4 mm²
Conductor Cross Section Solid (Min)	0.5 mm²
Conductor Cross Section Solid (Max)	6 mm²
Conductor Cross Section Flexible (Min)	0.5 mm²
Conductor Cross Section Flexible (Max)	4 mm²
AWG Conductor Cross Section (Min)	20
AWG Conductor Cross Section (Max)	10
Mounting Type	NS 35/7,5, NS 35/15, NS 32 (DIN Rail)
Color	Dark Gray (Traffic Gray B RAL 7043)
Insulating Material	PA (Polyamide)
Flammability Rating	UL 94 V0
Operating Temperature Range	-60 °C ... 110 °C
Degree of Pollution	3
Overvoltage Category	III
Insulating Material Group	I
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	5.8 x 0.82 x 4.8

Industrial Applications

1. Industrial Control Panel Protection

This fuse terminal block is ideal for protecting individual control circuits or sensitive components within industrial control panels. The 6.3A nominal current and 500V nominal voltage ensure robust overcurrent protection, while the DIN rail mounting facilitates organized integration. The wide operating temperature range of -60°C to 110°C guarantees reliable performance in diverse industrial environments.

Problem Solved

Provides reliable overcurrent protection for critical control circuits and components, preventing damage from surges and faults, while offering clear visual indication of fuse status.

Overcurrent ProtectionControl Circuit SafetyDIN Rail MountingIndustrial Panel WiringTemperature Extremes

2. Machine Safety Circuit Monitoring

In machine safety applications, rapid fault identification is crucial for minimizing operational downtime. The integrated 110-250 V AC/DC LED display immediately signals a blown fuse, allowing for quick troubleshooting. With a 6.3A rating and secure screw connections, it provides a robust and verifiable method for fusing power to safety relays or emergency stop circuits, enhancing machine reliability and safety.

Problem Solved

Ensures prompt identification of fuse failures in safety circuits via LED indicator, enabling fast maintenance and reducing machine downtime while maintaining a secure power connection.

Machine SafetyFuse MonitoringLED IndicationEmergency Stop CircuitsRapid Fault Detection

3. Building Automation System Sub-Circuit Fusing

For sub-circuits in building automation systems, such as lighting control or HVAC unit power, this fuse terminal block offers essential overcurrent protection. The 250V LED indicator simplifies fault localization for maintenance personnel in 110-250V AC/DC systems. Its compact 8.2 mm width enables high-density wiring in crowded electrical cabinets, and the UL 94 V0 flammability rating contributes to enhanced building safety.

Problem Solved

Offers reliable overcurrent protection for building automation sub-circuits and facilitates quick fault diagnosis through its LED indicator, optimizing system uptime and safety in confined spaces.

Building AutomationHVAC Power ProtectionLighting Control FusingCompact WiringFlammability Rated Components