WAGO 281-611/281-418 Fuse Terminal Block

Technical Overview

The WAGO 281-611/281-418 is a 2-conductor fuse terminal block designed for overcurrent protection in DIN-rail mounted applications. It features a pivoting holder for a 5 x 20 mm miniature metric fuse and includes a 120V neon lamp for clear visual indication of a blown fuse. Utilizing WAGO's CAGE CLAMP® technology, it provides secure, front-entry wiring for conductors from 0.08 to 4 mm² (28–12 AWG). Made with polyamide 6.6 insulation, it is suitable for DIN 35 rail mounting and offers reliable circuit protection in industrial control panels and automation systems.

Key Features

2-conductor design for overcurrent protection.
Pivoting fuse holder for 5 x 20 mm miniature metric fuses.
CAGE CLAMP® connection technology for quick, tool-free wiring.
Supports solid and fine-stranded conductors from 0.08 to 4 mm² (28–12 AWG).
DIN-rail mountable (35 x 15 and 35 x 7.5).
Polyamide 6.6 housing with UL94V-0 flammability rating.
Angled design and front-entry wiring.
Wide continuous operating temperature range (-60 to +105 °C).
Gray color.
IEC/EN 60947-7-3 compliant.
Multiple certifications including UL, CSA, DNV GL, ABS.

Technical Specification Matrix

Parameter	Value
Rated Voltage (IEC/EN 60664-1)	800V
Rated Current	10A
Rated Impulse Voltage (III / 3)	8kV
Overvoltage Category	III
Pollution Degree	3
Wire Size (AWG)	28 AWG to 12 AWG
Conductor Area CSA	0.08 to 4 mm²
Wire Connection Method	CAGE CLAMP® (Spring Clamp)
Mounting Type	DIN Rail (35 x 15 and 35 x 7.5)
Fuse Type	Cylindrical fuse; 5 x 20 mm miniature metric fuse
Blown Fuse Indication	Neon lamp (120 V / 120Vdc)
Color	Gray
Insulating Material	Polyamide 6.6 (PA66)
Flammability Rating	UL94V-0
Continuous Operating Temperature	-60 … +105 °C
Processing Temperature	-35°C...+85°C
Strip Length	9 … 10 mm / 0.35 … 0.39 inches
Number of Positions/Conductors	2
Total Number of Connection Points	2
Number of Levels	1
Type of Wiring	Front-entry wiring
Power Loss (Overload + Short-Circuit Protection, individual arrangement)	2.5W
Power Loss (Overload + Short-Circuit Protection, group arrangement)	1.6W
Power Loss (Short-Circuit Protection only)	4 W
Leakage current (blown fuse, neon lamp)	< 0.4 mA

Industrial Applications

1. Industrial Control Panel Circuit Protection

This terminal block is ideal for protecting individual circuits within industrial control panels, such as those powering motors, sensors, or HMI units, from overcurrents. The 800V rated voltage and 10A rated current are suitable for many common industrial control voltages, and the DIN-rail mounting simplifies integration into standard enclosures. The neon indicator provides immediate visual feedback of a blown fuse, significantly reducing troubleshooting time on a busy factory floor.

Problem Solved

Prevents damage to sensitive control components due to overcurrents and provides quick visual fault identification, minimizing downtime for maintenance personnel.

Overcurrent protectionindustrial controlDIN-rail mountingfault indication800V10ACAGE CLAMPPolyamide 6.6UL94V-0

2. Building Automation System Wiring with Fault Diagnostics

In building automation systems, where numerous circuits control lighting, HVAC, and security, this fuse terminal block offers reliable circuit protection and enhanced diagnostics. Its compact 8mm width allows for high-density wiring in crowded electrical cabinets. The 120V neon lamp for blown fuse indication is particularly useful for quickly identifying issues in distributed building systems without requiring specialized test equipment.

Problem Solved

Protects critical building infrastructure from electrical faults while enabling rapid identification of faulty circuits, thereby improving system reliability and reducing maintenance efforts.

Building automationcircuit integrityhigh-density wiringfault detection5x20mm fuse120V neon indicatorDIN 35 rail8mm width

3. Marine and Offshore Electrical Systems

The robust construction with Polyamide 6.6 insulating material and a continuous operating temperature range of -60 to +105 °C makes this fuse terminal block suitable for harsh marine and offshore environments. Its certifications (e.g., DNV GL, ABS) confirm compliance with maritime standards. It can be used for protecting auxiliary circuits, navigation equipment, or power distribution units on vessels and offshore platforms.

Problem Solved

Provides dependable overcurrent protection in demanding conditions (vibration, temperature extremes) and offers critical visual fault indication to ensure continuous operation and safety in marine applications.

Marine environmentoffshore platformsharsh conditionstemperature resistanceDNV GLABSvibration-resistantPolyamide 6.6800V10A