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Help Center1746-RT25B Allen Bradley SLC500 System Replacement TERMINAL BLOCK 1746RT25B
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Reliable Replacement Terminal Block for Allen Bradley SLC500 Systems
As a trusted supplier in the industrial automation market since 2011, Rossonix Co., Limited offers the 1746-RT25B replacement terminal block specifically designed for Allen Bradley SLC500 programmable controllers. With annual export values reaching US$5–10 million and serving major markets across North America, Europe, Oceania, and Asia, we ensure this component meets rigorous quality standards. Our terminal block provides an economical alternative without compromising fit, function, or durability, making it an ideal choice for maintenance, repair, and system upgrades.
The 1746-RT25B is a direct replacement for the original Allen Bradley part 1746-RT25B (also known as 1746RT25B). It is engineered to seamlessly integrate with SLC500 I/O modules, providing secure and reliable electrical connections. Whether you are retrofitting an existing system or building a new one, this terminal block simplifies wiring and reduces downtime.
Below we outline the key features, technical specifications, and benefits that make this replacement terminal block a smart choice for your automation needs.
Key Features & Specifications
Direct Replacement: Exact mechanical dimensions and pin configuration as the original Allen Bradley 1746-RT25B, ensuring plug-and-play installation without modification.
Robust Construction: Manufactured from high-temperature resistant thermoplastic housing and gold-plated copper alloy contacts, providing excellent conductivity and corrosion resistance.
Secure Connection: Screw clamp terminals accept solid or stranded wires from AWG 22 to 14, with a rated torque of 0.5 Nm for vibration-proof connections.
Clear Marking: Each terminal position is clearly numbered (1–25) for easy identification and wiring, reducing installation errors.
Compatibility: Works with all SLC500 processors (5/01, 5/02, 5/03, 5/04, 5/05) and I/O modules such as 1746-IB16, 1746-OB16, 1746-IA8, 1746-OA8, and many others.
Compact Design: Fits standard DIN rail mounting (35mm), saving panel space and allowing modular expansion.
| Parameter | Value |
|---|---|
| Model | 1746-RT25B (1746RT25B) |
| Number of Positions | 25 |
| Pitch | 3.81 mm (0.150 inches) |
| Rated Current | 10 A per contact (max) |
| Rated Voltage | 250 V AC/DC |
| Contact Resistance | ≤ 20 mΩ |
| Insulation Resistance | ≥ 100 MΩ at 500 V DC |
| Dielectric Strength | 1500 V AC for 1 minute |
| Operating Temperature | -40°C to +105°C |
| Housing Material | PA66, UL 94 V-0 rated (flame retardant) |
Benefits for Your Operation
Cost Savings: Our replacement terminal block offers OEM-equivalent performance at a fraction of the price, helping you reduce maintenance budgets without sacrificing quality.
Minimized Downtime: Quick and straightforward installation – simply remove the old block and snap in the new one; no special tools or programming required.
Long Service Life: The durable construction withstands harsh industrial environments, including vibration, moisture, and temperature extremes.
Easy Troubleshooting: Clear labeling and color-coded wire entry points simplify diagnostics and future modifications.
Wide Application: Suitable for use in manufacturing plants, packaging lines, material handling, water treatment, and other automation processes that rely on SLC500 controllers.
Why Choose Rossonix as Your Supplier?
Rossonix Co., Limited has been serving the global industrial market for over a decade. With an annual export value between US$5 million and US$10 million and a dedicated overseas office, we guarantee timely delivery and responsive customer support. Our product quality is backed by ISO9001 and ISO9000 certifications, ensuring consistent manufacturing and testing procedures. We ship from Shenzhen, Hong Kong, and Europe, offering flexible logistics to meet your project deadlines.
Every 1746-RT25B terminal block undergoes rigorous inspection before leaving our warehouse. We understand the critical role this component plays in your control system, and we strive to provide a reliable, cost-effective solution that keeps your operations running smoothly. Whether you need a single unit for emergency replacement or bulk quantities for system expansion, we are ready to support you.
Contact us today to place an order or request a sample. Experience the Rossonix difference – quality components, competitive pricing, and exceptional service.
Frequently Asked Questions
Q: Is this terminal block fully compatible with the original Allen Bradley 1746-RT25B?
A: Yes, it is a direct mechanical and electrical replacement. It matches the original dimensions, pin layout, and electrical ratings, ensuring a seamless fit with SLC500 I/O modules.Q: Does the terminal block come with mounting screws or a DIN rail clip?
A: The unit includes an integrated DIN rail mounting foot for 35mm rails. Screw terminals are included and pre-installed; no additional hardware is required for wiring.Q: What is the warranty period for this product?
A: We offer a standard 12-month warranty against manufacturing defects. Extended warranty options are available upon request.Q: Can I use this terminal block with AWG 18 wire?
A: Yes, the terminal accepts solid or stranded wire from AWG 22 to 14, so AWG 18 is within the supported range. We recommend stripping the wire to 7–8 mm and tightening the screw to 0.5 Nm.Q: Is there a risk of the terminal block overheating under continuous load?
A: No. The block is rated for 10 A per contact continuous operation at 105°C ambient. Proper ventilation and compliance with the rated current ensure safe performance.Q: How can I verify the quality before placing a large order?
A: We provide free samples (shipping costs apply) for evaluation. Pre-shipment inspection reports and third-party testing certificates are also available on request.Q: What shipping methods do you support?
A: We ship via DHL, FedEx, UPS, TNT, sea freight, and air freight from our warehouses in Shenzhen, Hong Kong, and Europe. Lead times are typically 3–7 business days for express delivery.Q: Do you offer custom labeling or packaging for OEM customers?
A: Yes, we can provide private labeling, custom packaging, and bulk packaging options. Please contact our sales team with your specific requirements.
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