H2EDGKD-2.5 Spring screwless Terminal block

H2EDGKD-2.5 PCB Pluggable Spring Screwless Terminal Block

This type of terminal block is a highly popular connection solution in industrial control, automation, and communication equipment. It perfectly combines the convenience of a pluggable header with the reliable, anti-vibration performance of a screwless spring connection.

Core Feature & Internal Structure

The wiring part of this terminal no longer uses traditional screws. Instead, it utilizes a pre-tensioned cage spring (compression spring) to clamp the wire securely. The section is composed of four key components:

• Wiring Chamber / Conductor Entry: Features a guiding bevel to facilitate wire insertion. The cavity is made of high-strength, flame-retardant PA66 nylon to ensure electrical safety.
• Spring Leaf (Reed): Made of high-quality stainless steel (e.g., 304) with excellent elasticity and fatigue resistance. The V-shaped structure provides a constant and strong clamping force.
• Operation Hole: A small channel located above or on the side used for inserting a specialized operating tool (standard straight screwdriver) to open the spring.
• Conductor: The core of current transmission, typically made of brass or phosphor bronze with a tin-plated surface to enhance corrosion resistance and conductivity.

Type and Pole

Type: PCB Pluggable Spring Terminal Block

Available Poles:

Technical Specifications

Wiring Process & Screwless Advantages

How to Wire (Fast & Simple):

• Preparation: Strip approx 8mm of insulation from the wire to reveal the clean conductor.
• Unlocking the Spring: Insert a standard straight screwdriver (2.5mm or 3.0mm) vertically into the operating hole. Push firmly to open the V-shaped spring plate.
• Inserting the Wire: Insert the bare conductor all the way through the wire entry.
• Locking & Completion: Pull out the screwdriver. The spring quickly rebounds, pressing firmly against the conductor to ensure a low-resistance, highly reliable connection. (Removing wires follows the exact same process).

Why Choose Screwless? (Key Advantages):

• Extreme Wiring Efficiency: Saves up to 70% of wiring time compared to screw terminals. Ideal for batch wiring and fast maintenance.
• Vibration Resistance & Maintenance-Free: Continuous spring pressure compensates for wire deformation and thermal expansion. Connection points will never loosen over time, making it perfect for heavy machinery and rail transit.
• No "Screw Effect": Screw connections may crush or cut thin strands. The spring leaf exerts wide, uniform surface pressure, firmly clamping multi-strand wires without damaging the conductors.
• Misoperation Prevention: Wiring quality is consistently reliable as long as the tool is used correctly. It eliminates human errors caused by over-tightening or under-tightening screws.

Dimensions

Packaging & Shipping

We choose high-quality and safe packaging materials to make sure your order won't be damaged during delivery. Acceptable trade terms include: EXW, FOB, CFR, CIF.

Application of Pluggable Terminal Block

• Motion controllers & Automation equipment
• Three-phase power meters & Electric equipment
• Microcomputer protection devices
• Security equipment & Internet of Things (IoT) devices

Terminal Block FAQ