SRD-S-112DM Relay (4-Pack) 125V AC 15A 4-Pin Water Heater & Air Conditioner Relay, Compatible with HVAC Systems, Replaces SRD-S-112DM-F for Appliance Repair

Description

Product Overview

The SRD S 112DM Relay 4-Pack by MANKASUKE is engineered for high‑current, high‑voltage applications commonly found in residential and commercial heating, ventilation, and air‑conditioning (HVAC) equipment. Each relay operates at a nominal 125 V AC and can safely carry up to 15 A, making it suitable for driving water‑heater elements, air‑conditioner compressor clutches, blower motors, and other high‑power loads. The unit features a compact 4‑pin configuration (0.8 × 0.6 × 0.8 in, 0.75 oz) that conforms to industry standards, allowing it to replace the original SRD‑S‑112DM‑F part without any modifications to the wiring harness. Constructed from a copper‑based coil and a robust silicone‑filled contact assembly, the relay provides reliable arc suppression and long‑term durability even in harsh temperature cycles. The package includes four identical relays, giving technicians the flexibility to service multiple units or keep spares on hand for future maintenance.

Usage

These relays are intended for use in a variety of HVAC scenarios. In water‑heater installations, the relay controls the heating element, turning it on when the thermostat calls for hot water and off when the desired temperature is reached. In air‑conditioner systems, the relay engages the compressor clutch, enabling the motor to start and stop in response to thermostat demands. The same part can be employed in furnace blower circuits, where it switches the fan motor on during the heating cycle. Because the relay is rated for 125 V AC, it is compatible with most North American residential power supplies. Installation requires only basic wiring knowledge: connect the coil terminals to the control circuit and the load terminals to the appliance component. The clear 4‑pin layout minimizes the risk of mis‑wiring, and the included installation guide provides step‑by‑step instructions for both professional technicians and competent DIY homeowners.

Why Choose Us

MANKASUKE has a reputation for producing reliable electrical components that meet rigorous quality standards. Each SRD S 112DM relay undergoes a multi‑stage testing process, including coil resistance verification, contact resistance measurement, and high‑temperature endurance trials. This ensures that every unit shipped performs within the specified parameters and delivers consistent operation over thousands of switching cycles. The 4‑pack offering provides exceptional value, reducing the per‑unit cost compared to purchasing single relays. Additionally, MANKASUKE backs the product with a limited warranty and responsive technical support, giving customers confidence that any issues will be addressed promptly. The relay’s design also incorporates a silicone‑filled contact chamber, which protects against moisture ingress and corrosion, extending the service life even in humid or dusty environments.

Key Features

• High‑current capacity: Handles up to 15 A at 125 V AC for demanding HVAC loads.
• Compact 4‑pin design: Easy to install with clear terminal markings, reducing wiring errors.
• Silicone‑filled contacts: Provides superior arc suppression and resistance to moisture.
• Four‑pack value: Ideal for technicians needing multiple replacements or spares.
• Manufacturer support: Backed by MANKASUKE warranty and dedicated after‑sales service.

FAQ

What appliances can I replace with this relay?

The SRD S 112DM relay is compatible with water heaters, air‑conditioner units, furnace blowers, and any HVAC component that originally uses part numbers SRD‑S‑112DM or SRD‑S‑112DM‑F.

How do I know if my existing relay is faulty?

Common symptoms include the appliance not heating or cooling, error codes such as E5 on water heaters or F1 on AC compressors, and intermittent operation. A visual inspection may reveal burnt contacts or a failed coil.

Is professional installation required?

No, the relay’s straightforward 4‑pin wiring can be installed by anyone with basic electrical knowledge. However, if you are unsure, consulting a licensed HVAC technician is recommended.

Can this relay be used in commercial HVAC systems?

Yes, the relay’s voltage and current ratings meet the requirements for many commercial applications, provided the system operates on a 125 V AC supply.

What warranty does MANKASUKE provide?

MANKASUKE offers a limited one‑year warranty covering manufacturing defects, along with access to technical support for installation and troubleshooting.