STTB2.5 Spring Din Rail Terminal Block

At the heart of the STTB2.5 Spring Din Rail Terminal Block is what makes it truly robust: the pull-back spring-cage. Forget wrenches—a simple tool in the access hole retracts the cage, you insert the wire, and release. The spring, via a precision pressure block, drives the wire into the fixed contact with a constant, high force. This creates what we call a gas-tight connection—inherently resistant to vibration loosening, which is why it’s so critical for mobile applications.

This reliability extends to mounting. The STTB2.5 Spring Din Rail Terminal Block features universal snap-on feet, allowing you to click it onto standard NS 35 rails (7.5mm or 15mm high) and just as easily remove it—no tools needed. This speeds up panel builds and field modifications dramatically.

So, where does such a combination of density, tool-less operation, and vibration resistance matter most? Look to rail. The STTB2.5 Spring Din Rail Terminal Block is extensively used in locomotive and rolling stock control systems because it’s designed for that environment. It doesn’t just meet standards like DIN EN 50155 for shock/vibration and EN 45545-2 for fire safety—it’s proven in them through rigorous testing. For engineers dealing with motion, shock, and a need for maintenance speed, specifying the STTB2.5 Spring Din Rail Terminal Block is a direct way to mitigate connection failure risk.

Product Parameter (Specification)

Product Application

When we specify materials for the STTB2.5 Spring Din Rail Terminal Block, the goal is long-term performance under stress. That's why the housing is polyamide (PA66) with a UL 94 V0 rating—it’s not just about flame retardancy; this material offers a great balance of mechanical strength, creep resistance, and stable insulation properties, even in elevated temperatures. It’s precision injection-molded, which is crucial for maintaining the dimensional accuracy that allows for consistent, high-density snap-on mounting.

The conductive path is equally deliberate. The spring and contacts are stamped from high-performance copper alloy—often a specific brass grade for its ideal spring characteristics—and then plated. Tin or nickel plating isn't just a finish; it’s a functional barrier. It prevents the formation of non-conductive oxides on the contact surfaces, which is the primary cause of rising contact resistance and thermal failure over time. This careful material science is what underpins the reliable, low-resistance connection of the STTB2.5 Spring Din Rail Terminal Block. The result is a component where the material choices actively work to preserve electrical integrity for the life of your installation.

Warranty Period

All products are covered by a standard one-year warranty for manufacturing defects, which includes replacement or compensation. This warranty does not apply to damage or failure due to improper use.

Company Culture

We are a team of professionals, with all staff members holding more than five years of work experience. To foster better collaboration, our company regularly conducts team-building activities for all employees.

Service Advantage

Our sales team provide 24 hours on-line service. We will give you feedback within one hour when customer ask. Any quality problem will be replied at the first time.