Weidmuller WTR 2.5/SI LD 36V Fuse Terminal Block

Technical Overview

The Weidmuller 1763950000 is a W-Series fuse terminal block designed for overcurrent protection in industrial control systems. It mounts on a standard TS 35 DIN rail and features a reliable screw connection for wires ranging from 22 to 12 AWG. This terminal is rated for 36V and 6.3A, accepts a pluggable G-Si 5x20 cartridge fuse, and includes an integrated red LED for clear visual indication of a blown fuse, simplifying troubleshooting. [5, 8, 11] Constructed from V-0 rated Wemid material, it ensures stable performance in a wide operating temperature range of -50°C to 120°C. [8, 11]

Key Features

Accepts standard G-Si 5x20 pluggable cartridge fuses. [8]
Built-in LED provides immediate visual indication of fuse status. [5, 8]
Slim 5.1mm width for high-density mounting on TS 35 DIN rail. [11]
Secure screw-type connection for a reliable clamping range of 0.5 to 4 mm². [8]
Constructed with Wemid material rated to UL 94 V-0 for enhanced safety. [8, 11]
Wide continuous operating temperature range from -50 °C to +120 °C. [8, 11]

Technical Specification Matrix

Parameter	Value
Rated Voltage	36 V
Rated Current	6.3 A
Number of Connections	2
Mounting Type	TS 35
Connection Type	Screw connection
Wire Gauge Range (AWG)	22 to 12 AWG
Fuse Type	G-Si 5x20 cartridge
Operating Temperature	-50 °C to 120 °C
Material	Wemid
Flammability Rating	UL 94 V-0

Industrial Applications

1. PLC I/O Circuit Protection

Used to protect individual low-voltage DC input/output channels on a Programmable Logic Controller (PLC) from overcurrent events in an industrial automation control panel.

Problem Solved

Provides granular, easily diagnosable protection for sensitive PLC I/O cards. The 36V rating is ideal for standard 24VDC control systems, and the integrated LED allows maintenance to instantly identify a tripped circuit, drastically reducing machine downtime and troubleshooting hours. The slim 5.1mm width is critical for high-density I/O panels.

PLC I/O24VDC ControlOvercurrent ProtectionDIN RailControl CabinetFault Indication

2. Low-Voltage Power Distribution in Machinery

Deployed within a machine's main control cabinet to distribute and protect multiple low-voltage auxiliary circuits, such as those for sensors, indicator lights, and solenoids.

Problem Solved

Instead of a single larger fuse protecting multiple devices, this terminal allows for individual fusing of each circuit. A short circuit on one sensor won't disable an entire group. The 6.3A rating is sufficient for many auxiliary components, and the TS 35 mounting standardizes installation in any industrial panel.

Power DistributionAuxiliary CircuitSensor PowerCircuit Isolation36VMachine Building

3. Automotive Component Test Benches

Integrated into an automotive electronics test bench to provide fused power to the device under test (DUT), such as an infotainment system or lighting module.

Problem Solved

Protects delicate and often expensive prototype electronics from damage during testing. The 36V rating safely covers both 12V and 24V automotive standards. The secure screw connection ensures reliable operation in environments with potential vibration, and the LED indicator immediately flags a fault with the DUT, saving valuable engineering time.

Test BenchAutomotive ElectronicsDevice Under Test (DUT)Fused Power12VDC24VDC