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Leipole Electric

Feed Through Terminal Blocks

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Overview

Through-type terminal block, space-saving design, suitable for high-density electrical connections.

  • Double-end through-design: realize efficient connection and transmission of cables.
  • Space-saving structure: suitable for control cabinets and electrical equipment with high density installation.
  • Multi-voltage compatibility: supports electrical systems with multiple voltage levels.
  • High mechanical strength: improves shock and vibration resistance to ensure stable operation.
  • Convenient installation: equipped with standard mounting rails, installation and removal are more efficient.

Key advantages

  • Reliable Electrical Continuity


    Optimized metal conductors provide low contact resistance and ensure stable current transfer across the terminal point under both AC and DC conditions.

  • Secure Clamping Mechanism


    The high-torque screw or spring clamp ensures firm wire retention, preventing loosening due to vibration, shock, or thermal cycling.

  • Space-Saving Modular Design


    Slim profiles and stackable mounting allow for high-density installation on DIN rails, maximizing cabinet space efficiency without sacrificing safety or accessibility.

  • Quick Identification & Bridging


    Integrated label slots and standardized bridge channels enable easy circuit marking and rapid configuration changes using jumpers or busbars.

  • Universal Compatibility


    Compatible with solid, stranded, or ferrule-fitted wires, the terminal blocks support a wide wire size range to fit diverse wiring needs.

  • Flame-Retardant Housing


    PA66 insulation (UL94 V-0 rated) resists high temperatures and mechanical stress, ensuring long service life in demanding environments.

Models & specifications

leipole Feed Through Terminal Blocks JPT

JPT Feed-through Terminal Block. Connection technology: JPT feed-through terminal blocks connect directly to the wire, so solid wires or insulated terminals can be connected without tools. The spring design accepts solid wires or insulated terminals pushed straight in, even with a wire cross-section of 0.5 mm². Use the pull-out button to open the spring, release the wire and disconnect it without touching any metal parts.

Part Number Rated Voltage Rated Current thickness length / height solid cross section（min-max） wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at
JPT 2.5 / JPT 2.5-BU 800V 24A 5.2 58 / 38 0.50mm² - 4.00mm² 13 Kiva 13/06/2025 09:11 AM Kiva 19/06/2025 07:58 AM
JPT 1.5/JPT 1.5-BU 500V 17.5A 4.2 58 / 38 0.50mm² - 1.50mm² 21 Kiva 16/06/2025 05:40 AM Kiva 19/06/2025 07:58 AM
JPT 2.5-TW / JPT 2.5-TW-BU 800V 24A 5.2 68.4 / 38 0.50mm² - 4.00mm² 45 Kiva 19/06/2025 08:00 AM Kiva 19/06/2025 08:00 AM
JPT 2.5-QU/ JPT 2.5-QU-BU 800V 24A 5.2 78.7 / 38 0.50mm² - 4.00mm² 46 Kiva 19/06/2025 08:01 AM Kiva 19/06/2025 08:01 AM
JPTTB 2.5/JPTTB 2.5-BU 800V 24A 5.2 83.6 / 48.7 0.50mm² - 4.00mm² 47 Kiva 19/06/2025 08:02 AM Kiva 19/06/2025 08:02 AM
Part Number Rated Voltage Rated Current thickness length / height solid cross section（min-max）

Applications

  • Industrial Control Cabinets:

    Enables secure wiring for relays, PLCs, circuit breakers, and I/O devices.

  • Power Distribution Panels:

    Facilitates branching and feeding power to loads or subsystems through secure point-to-point wiring.

  • Automation Systems:

    Ideal for sensors, actuators, and low-voltage control signal routing in robotics and manufacturing lines.

  • Building Electrical Systems:

    Simplifies structured cabling for lighting, HVAC, and alarm systems.

  • Renewable Energy Installations:

    Connects PV strings, inverters, and battery systems with high contact reliability.

Basic knowledge

What Is a Feed Through Terminal Block?

A feed-through terminal block is a type of modular connector that allows an incoming wire on one side to connect to an outgoing wire on the other side through a conductive internal path. It is used to connect, organize, and distribute electrical circuits efficiently inside panels.

How Does It Work?

Conductors are inserted into each side of the terminal and secured using a screw or push-in mechanism. Current “feeds through” the metal contact inside the housing, allowing safe and reliable energy transmission.

Why Use Feed Through Blocks Instead of Wire Nuts or Soldering?

  • Standardization

    – Supports neat, repeatable wiring layouts

  • Safety

    – Reduces risk of loose wires or arcing

  • Maintenance-Friendly

    – Easy wire removal or addition

  • Scalability

    – Expandable via bridging accessories and stackable designs

Frequently asked questions

Q1: What wire types are compatible with JPT feed-through terminals?


Solid, stranded, and ferrule-terminated copper conductors are fully supported within the specified wire gauge range.

Q2: Can the JPT Series be used for both power and signal wiring?


Yes. Models are available for both low-voltage signal and higher-current power applications.

Q3: How are terminals labeled for identification?


Each block has a dedicated marking slot for printed or hand-written markers. Pre-printed Z-type or Zack markers can also be used.

Q4: Do I need tools for installation?


For screw-type models, a screwdriver is required. Push-in variants allow tool-free conductor insertion for ferrule-ended wires.

Q5: Are bridging accessories available?


Yes. LEIPOLE provides a range of standard plug-in bridges and jumper bars compatible with the JPT Series to enable multi-point connections.

Why use feed through terminal blocks for power distribution?

They provide a direct, low‑resistance path for connecting conductors, ensuring efficient and safe power transfer across circuits.

What’s the advantage of DIN‑rail mounted feed through terminal blocks?

They allow quick installation, modular expansion, and standardized sizing for control panels and switchgear assemblies.

When should I choose a 125A feed through terminal block?

For heavy‑duty applications requiring high‑current handling with minimal voltage drop and reliable long‑term clamping force.

How do compact feed through terminal blocks save panel space?

Their slim housing and optimized conductor entry points maximize wiring density without sacrificing electrical performance.

Why select a feed through terminal block with an integrated test point?

It allows circuit testing and troubleshooting without disconnecting wires, reducing downtime during maintenance.

Product inquiry

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Selection & support

Selecting LEIPOLE feed-through terminal blocks

Wire dense terminal rows without losing track of each circuit.

What is a feed-through terminal block?

It joins an incoming and an outgoing conductor of the same circuit side by side on a DIN rail, so wiring passes through the panel in neat rows. LEIPOLE JPT 1.5 and JPT 2.5 blocks are rated 17.5 A at 500 V and 24 A at 800 V, with -TW, -QU and two-level JPTTB versions that add connection points.

Compare screw terminals

When should I choose feed-through terminal blocks over screw or barrier blocks?

For dense rows of control and signal wiring. LEIPOLE JPT blocks are 4.2 to 10.2 mm thick, carry 17.5 to 57 A at 500 or 800 V and take conductors of 0.5 to 10 mm², and the two-level JPTTB versions add connection points at 5.2 or 6.2 mm. For feeders above 57 A, compare the JUKH screw blocks, up to 415 A, or the UN barrier range.

Compare terminal block types