Relay Rayex LD-12F-R Plastic Enclosed-Style SPDT 12V 40A Pack of 2

Description

Product Overview

The Rayex LD-12F-R is a high‑performance plastic enclosed‑style electromechanical relay designed for demanding industrial environments. Featuring a single‑pole double‑throw (SPDT) contact configuration, this relay delivers a reliable 12 V coil voltage with a coil resistance of 87 ohms, ensuring consistent actuation across a wide temperature range. The contacts are rated for 40 A continuous current, providing ample capacity for motor starters, heating elements, and other high‑load applications. Housed in a compact 1.10″ × 1.10″ enclosure, the relay occupies minimal board space while offering robust dielectric strength of 500 V between the coil and contacts, protecting against voltage spikes and ensuring long‑term reliability.

Construction utilizes a durable plastic shell that resists corrosion, chemical exposure, and mechanical impact, making it suitable for harsh factory floors, outdoor installations, and equipment that experiences frequent vibration. The five‑pin layout includes quick‑connect terminals that simplify wiring and reduce installation time, while the clear labeling of pins helps prevent wiring errors. With a package dimension of 3.46 × 3.11 × 0.12 inches and a lightweight of 2.82 oz, the relay is easy to handle and integrate into both new designs and retrofits.

Usage

Designed for a broad spectrum of industrial control applications, the Rayex LD-12F-R excels in automation systems, programmable logic controller (PLC) modules, and motor control circuits. Its SPDT configuration makes it ideal for switching between power sources, selecting operational modes, or providing safety interlocks in machinery. The 12 V coil voltage aligns with common control board supplies, allowing seamless integration without the need for additional voltage conversion circuitry.

Typical use cases include controlling solenoid valves in fluid handling systems, toggling between heating and cooling circuits in HVAC equipment, and acting as a fail‑safe switch in emergency stop circuits. The relay’s high current rating supports direct connection to heavy‑duty loads such as resistive heaters, conveyor motor drives, and lighting banks, eliminating the need for auxiliary contactors in many scenarios. Its compact size enables installation in densely packed control panels, while the plastic enclosure provides insulation from surrounding components, reducing the risk of short circuits.

Engineers and technicians appreciate the relay’s quick‑connect terminals for rapid prototyping and field service, as the design allows for tool‑free wire insertion and removal. The 500 V dielectric strength ensures safe operation even in environments with high transient voltages, such as those found in welding equipment or variable frequency drive (VFD) installations. Overall, the LD-12F-R delivers a balance of performance, durability, and ease of use that meets the rigorous demands of modern industrial automation.

Why Choose Us

Rayex Electronics has built a reputation for delivering reliable electromechanical components that stand up to the toughest conditions. Each LD-12F-R relay undergoes stringent quality control testing, including coil resistance verification, contact resistance measurement, and dielectric withstand testing, to guarantee that every unit meets or exceeds industry standards. Our manufacturing process incorporates precision molding techniques that ensure uniform wall thickness and consistent material properties across every batch, resulting in a product that maintains its performance over years of operation.

Choosing Rayex means benefiting from a global support network that provides technical assistance, detailed datasheets, and rapid response to any inquiries. We understand that downtime can be costly, so we offer comprehensive after‑sales service, including replacement parts, troubleshooting guides, and firmware updates for compatible control systems. Our commitment to sustainability is reflected in the use of recyclable plastic materials and energy‑efficient production methods, aligning with the growing demand for environmentally responsible components.

In addition to the standard specifications, the LD-12F-R is available in a pack of two, delivering cost‑effective redundancy for critical applications where reliability is paramount. This packaging option reduces inventory complexity and provides a ready backup solution, ensuring that your systems remain operational even if a single relay fails. By selecting Rayex, you invest in a product that combines engineering excellence, robust construction, and a customer‑centric approach that supports your project’s success from design through deployment.

Key Features

• High current rating of 40 A enables direct control of heavy loads without extra contactors.
• Compact plastic enclosure resists corrosion and mechanical impact, ideal for harsh environments.
• Quick‑connect five‑pin terminals simplify installation and reduce wiring errors.
• 500 V dielectric strength protects against voltage spikes, enhancing safety and longevity.
• Comprehensive after‑sales support and warranty provide peace of mind for critical applications.

FAQ

What is the coil resistance and why does it matter?

The coil resistance of the LD-12F-R is 87 ohms. This value determines the amount of current drawn by the coil at the rated 12 V, influencing power consumption and heat generation. A stable resistance ensures consistent actuation timing and reduces the risk of coil burnout, which is especially important in applications that require frequent switching.

Can this relay be used with AC loads?

Yes, the relay’s contacts are rated for 40 A at both AC and DC voltages, making it suitable for switching AC loads such as lighting circuits, heating elements, and motor starters. However, it is essential to verify that the voltage and current specifications of the specific AC load fall within the relay’s rated limits to maintain safe operation.

How does the dielectric strength affect performance?

Dielectric strength of 500 V between the coil and contacts provides a high level of insulation, preventing arcing or breakdown when the relay is exposed to voltage transients. This characteristic is crucial in industrial settings where surge voltages from inductive loads or switching events are common, as it helps protect both the relay and the surrounding circuitry.

What are the benefits of the plastic enclosure compared to metal housings?

Plastic enclosures offer several advantages: they are lighter, reducing overall system weight; they are non‑conductive, eliminating the need for additional isolation measures; and they resist corrosion from chemicals and moisture, extending the relay’s service life in humid or chemically aggressive environments. Additionally, the molded design can incorporate precise snap‑fit features for secure mounting.

Is the pack of two relays suitable for redundancy?

Absolutely. Supplying relays in a two‑unit pack allows designers to implement redundant circuits, where one relay can take over if the other fails. This redundancy is critical in safety‑related applications such as emergency stop systems, where uninterrupted operation is mandatory. The identical specifications of both units ensure seamless substitution without re‑engineering the control logic.