Fuse Type Terminal Block Selection Guide: RPT4-HESI LED24V vs. RPTTB-HESI LED24V
Introduction
In modern control panels and industrial automation systems, fuse-type terminal blocks play a vital role in protecting circuits and ensuring safe, efficient connections. RY-ELE offers two outstanding models—RPT4-HESI LED24V and RPTTB-HESI LED24V—both featuring LED fuse indication and easy plug-in wiring. While they share similar protective functions, each is designed for different wiring needs and installation preferences.
This article compares their technical characteristics, innovative features, and application scenarios to help you make the right choice for your system.
Product Overview
🔹 RPT4-HESI LED24V
The RPT4-HESI is a fuse-type in-line terminal block with plug-in connection technology, designed for quick wiring and stable operation.
Key Features:
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LED Fuse Indicator (24V) for real-time circuit status monitoring.
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Compact, front-entry design, saving space inside dense control panels.
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Quick installation on NS35/7.5 DIN rail without tools.
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Strong mechanical stability for industrial-grade environments.
This model is ideal for power distribution and protection in automation panels, where compact design and fast wiring are essential.
🔹 RPTTB-HESI LED24V
The RPTTB-HESI is an inline fuse terminal block with a through-type connection. It integrates a fuse holder and LED indicator into a single compact housing, enabling simple testing and maintenance.
Key Features:
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Fuse protection with LED failure indication at 24V.
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Through-type wiring, allowing easy current path testing and disconnection.
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Modular bridging compatibility, ideal for complex circuits.
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Easy fuse replacement and clear visual feedback.
Technical Highlights
RY-ELE terminal blocks are designed for long-lasting performance, high safety, and user convenience. Both RPT4-HESI and RPTTB-HESI share the following engineering advantages:
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High-temperature resistant PA66 housing – Flame-retardant UL94 V0, ensuring long-term insulation and safety.
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Spring clamp or screw connection options – Guarantee secure wiring even under vibration or shock.
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Integrated LED fuse indicator circuit – Energy-efficient design with bright, clear signal visualization at 24VDC.
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Modular bridging system – Supports easy potential distribution across multiple terminal blocks.
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Standard DIN rail mounting – Compatible with NS35 rails for quick installation.
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Built-in test slot – Enables safe current measurement without disconnecting the circuit.
Each terminal block is engineered with RY-ELE's precision LED circuit and modular design, ensuring quick fault detection and easy maintenance while maintaining stable, safe performance in industrial environments.
This model suits instrumentation, signal control, and power distribution applications where monitoring and quick fuse replacement are critical.
Key Differences
| Feature | PT4-HESI LED24V | PTTB-HESI LED24V |
|---|---|---|
| Connection Type | Direct in-line plug connection | Through-type fuse terminal |
| LED Indication | 24V circuit fuse status | 24V circuit fuse status |
| Fuse Holder | Vertical fuse slot, front access | Top-mounted fuse holder |
| Panel Space | Compact, saves rail space | Slightly wider for test access |
| Maintenance | Easy wiring and visual inspection | Easier fuse testing and replacement |
| Typical Use | Power distribution, automation systems | Signal and control circuits with monitoring needs |
Application Scenarios
✅ Scenario 1: Compact Automation Cabinets (RPT4-HESI)
In small control panels or machinery with limited space, the RPT4-HESI provides reliable fuse protection without compromising layout density. The front-entry plug connection simplifies installation and maintenance, making it ideal for machine builders, OEMs, and system integrators optimizing cabinet space.
Pain Point Solved: Reduces wiring clutter and improves efficiency in compact control enclosures.
✅ Scenario 2: Signal Monitoring & Maintenance (RPTTB-HESI)
For instrumentation or PLC I/O systems, RPTTB-HESI ensures clear LED fuse indication and quick fuse replacement, reducing downtime during maintenance. The through-type design supports testing without disconnecting the line, improving reliability in signal transmission circuits.
Pain Point Solved: Enables quick fault detection and simplified maintenance in signal and control loops.
Industry Applications
RY-ELE fuse terminal blocks are widely used across multiple sectors of automation and control engineering:
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Industrial Automation – For reliable 24VDC protection in PLC and I/O systems.
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Power & Energy Distribution – Stable and safe current control in compact switchboards.
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Building Automation & HVAC – Visual fuse monitoring ensures fast maintenance in distributed systems.
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Transportation & Rail Systems – Secure wiring under vibration with LED fuse indication.
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Machine Manufacturing – Simplifies protection wiring and testing during assembly.
For example, in an automated packaging line, RPT4-HESI LED24V units protect 24V actuator circuits, while RPTTB-HESI LED24V modules handle signal loops with real-time LED indication — ensuring continuous operation with reduced downtime.
How to Choose the Right Terminal Block
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Choose RPT4-HESI LED24V if your project focuses on space-saving installation, compact layout, and fast wiring.
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Choose RPTTB-HESI LED24V if your system requires frequent maintenance, circuit testing, and clear fault indication.
Both models share RY-ELE's high-quality insulation materials, UL94 V0 flame-retardant rating, and DIN-rail compatibility, ensuring stable, safe performance across industrial applications.
Conclusion
Both RPT4-HESI LED24V and RPTTB-HESI LED24V deliver excellent circuit protection and visual feedback, but their strengths lie in different applications.
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RPT4-HESI emphasizes compactness and easy wiring, ideal for dense industrial panels.
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RPTTB-HESI focuses on testing convenience and maintenance efficiency, perfect for signal monitoring systems.
Whichever model you choose, RY-ELE guarantees reliable performance, precise engineering, and a user-friendly wiring experience.
Discover more about our terminal solutions at RY-ELE Official Website.
