Description
Product Overview
The JALYKA HFV15-12-Z4ST relay is engineered to meet the demanding requirements of modern heating, ventilation, and air‑conditioning (HVAC) systems. Featuring a five‑pin configuration, this 40 amp relay utilizes a high‑quality plastic sealing housing that protects internal contacts from dust, moisture, and corrosion, extending service life even in harsh furnace environments. The relay’s compact footprint—measuring just 1.18 × 0.79 × 0.39 inches and weighing 1.76 ounces—makes it ideal for tight installation spaces where larger components would be impractical. Its electromagnetic operation provides fast, reliable switching, ensuring that furnace motors and blower assemblies receive precise control signals without delay. The HFV15-12-Z4ST model is part of JALYKA’s trusted product series, known for consistent performance, rigorous testing, and compliance with industry standards for safety and durability.
![[Product front view showing all components]](https://www.expectingco.store/wp-content/uploads/2026/08/2f3710a6b30e4e0ab1de19561c2455be.jpg)
Usage
This relay is specifically suited for residential and commercial furnace replacement projects, as well as new HVAC installations that require a dependable switching component. It can be used to control blower motors, igniters, and other critical furnace elements that demand a 40 A rating. The plastic sealing design reduces the risk of short circuits caused by condensation or airborne particles, making it a reliable choice for environments with fluctuating temperature and humidity. Installers will find the 5‑pin layout intuitive, allowing for straightforward wiring to standard control boards. Whether you are upgrading an older system or building a new heating solution, the HFV15-12-Z4ST provides the performance needed to maintain consistent airflow, efficient combustion, and overall system reliability.
Why Choose Us
Choosing the JALYKA HFV15-12-Z4ST relay means selecting a component backed by a brand with a reputation for quality and customer support. JALYKA manufactures its relays in facilities that adhere to strict quality‑control protocols, ensuring each unit meets exact specifications before leaving the factory. The plastic sealing technology not only safeguards the internal contacts but also contributes to a lighter overall weight, simplifying handling and installation. Our relays are tested for electrical endurance, thermal stability, and mechanical resilience, guaranteeing that they can withstand the repetitive cycling typical of furnace operation. In addition, JALYKA offers responsive after‑sales service, providing technical assistance, replacement parts, and warranty coverage to give installers confidence that they are backed by a reliable partner.
Key Features
- Five‑pin configuration simplifies wiring and reduces installation time for HVAC technicians.
- Robust 40 A rating handles high‑current furnace components with confidence.
- Plastic sealing housing protects contacts from dust, moisture, and corrosion for longer service life.
- Compact dimensions allow use in confined spaces where larger relays cannot fit.
- JALYKA’s dedicated customer support ensures quick assistance and reliable warranty coverage.
FAQ
What type of furnace applications is this relay suitable for?
The HFV15-12-Z4ST is designed for both residential and commercial furnace systems that require a 40 A relay. It works well with blower motors, igniters, and other high‑current components commonly found in HVAC units.
How does the plastic sealing protect the relay?
The plastic sealing creates a barrier against dust, moisture, and corrosive particles. This barrier helps maintain the integrity of the internal contacts, reducing the likelihood of short circuits and extending the relay’s operational lifespan.
Can this relay be used as a direct replacement for older models?
Yes. The HFV15-12-Z4ST matches the standard 5‑pin layout used in many legacy furnace relays, making it a drop‑in replacement. Its electrical specifications align with common furnace requirements, ensuring seamless integration.
What warranty does JALYKA provide for this relay?
JALYKA offers a one‑year limited warranty covering manufacturing defects. Should any issues arise, customers can contact JALYKA support for troubleshooting, replacement, or repair assistance.
Is special tooling required for installation?
No special tools are needed. The relay’s pins are sized for standard HVAC control boards, and the compact design allows for easy handling with common screwdriver sets and wire strippers.




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