Technical Overview

The Weidmüller WSI 6 (Part No. 2562730000) is a high-reliability fuse terminal block engineered for industrial control and power distribution systems. Utilizing a robust screw connection mechanism, it accommodates conductors from 0.5 mm² to 10 mm² with a rated cross-section of 6 mm². The terminal features a pivoting fuse holder designed for standard G-Si 5x20 mm cartridge fuses, ensuring circuit isolation and overcurrent protection rated up to 6.3 A at 500 V. Manufactured from advanced Wemid composite material (UL 94 V-0), it offers superior thermal stability with an operating range of -60 °C to +130 °C. The WSI 6 is DIN rail mountable (TS 35) and carries extensive global certifications including ATEX and IECEx for hazardous environments.

Key Features

Screw connection technology for secure, vibration-resistant wiring
Pivoting fuse holder allows for tool-free fuse replacement
Accommodates standard G-Si 5x20 mm cartridge fuses
Rated voltage 500 V, rated current 6.3 A
Wide operating temperature range: -60 °C to +130 °C
Constructed from Wemid material with UL 94 V-0 flammability rating
Snap-on mounting for standard TS 35 DIN rails
Certified for hazardous areas (ATEX, IECEx)
Supports wire cross-sections from 0.5 mm² to 10 mm²

Technical Specification Matrix

Technical Parameter	Specification
Rated Voltage	500 V
Rated Current	6.3 A
Rated Cross-Section	6 mm²
Connection Type	Screw connection
Material	Wemid
Operating Temp Min	-60 °C
Operating Temp Max	130 °C
Flammability Rating	UL 94 V-0
Mounting Rail	TS 35
Clamping Range Min	0.5 mm²
Clamping Range Max	10 mm²
Torque Min	0.8 Nm
Torque Max	1.6 Nm
ATEX Certificate	DEMKO14ATEX1389U
IECEx Certificate	IECEXUL14.0097U
Width	7.9 mm
Height	60 mm
Depth	61 mm
Fuse Size	G-Si 5 x 20 mm
Net Weight	18.36 g

Industrial Applications

1. Control Circuit Protection in Industrial Cabinets

Deployed in main control panels to provide individual fusing for sensitive 24V DC or 230V AC downstream components such as PLCs, I/O modules, and relays.

Problem Solved

Prevents a single field short circuit or overload from tripping the main power supply, ensuring high availability and protecting expensive controller hardware.

Selective coordinationControl voltage distributionShort circuit protectionPLC protection

2. Hazardous Area Instrumentation Circuits

Utilization in process automation systems requiring ATEX/IECEx certified components for fusing loops in Zone 2 hazardous locations.

Problem Solved

Ensures compliance with strict explosion protection standards while providing necessary overcurrent protection for field instruments in petrochemical or pharmaceutical facilities.

ATEX certifiedIECEx complianceHazardous locationProcess instrumentation

3. HVAC Actuator and Sensor Isolation

Integration into building automation marshalling panels to protect and isolate power lines feeding damper actuators, valves, and field sensors.

Problem Solved

Facilitates safe maintenance and isolation of specific field devices without disconnecting the main power bus, minimizing system downtime during service.

Field device isolationBuilding automationCircuit segmentationMaintenance safety

Weidmuller WSI 6 Fuse Terminal Block Screw Connection

Weidmüller WSI 6 Fuse Terminal Block Screw Connection

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Control Circuit Protection in Industrial Cabinets

2. Hazardous Area Instrumentation Circuits

3. HVAC Actuator and Sensor Isolation