# OJ Electronics EFST-6-221 Alarm Thermostat Relay - Temperature Control

The OJ Electronics EFST-6-221 Alarm Thermostat Relay is a critical component for precise temperature regulation in industrial and automation systems. Designed for reliability and efficiency, this relay ensures optimal performance in heating and cooling applications. With part number 54103 and dipswitch feature 54102, this product offers seamless integration and customization.

-   **Precise Temperature Control:** Features a 4°C temperature differential for accurate heating and cooling management.
-   **Versatile Compatibility:** Operates at 24VAC and integrates with 0-10V DC input systems.
-   **Efficient Design:** Lightweight at only 220g, facilitating easy installation and reducing system load.
-   **Reliable Performance:** Ensures consistent and dependable temperature regulation for various applications.
-   **User-Friendly:** Designed for easy customization and adjustment to meet specific requirements.

This thermostat relay is ideal for maintaining the desired temperature in various industrial settings. The EFST-6-221 delivers consistent and reliable performance, making it a valuable addition to any temperature control system. Trust in OJ Electronics for dependable solutions. For inquiries and support, contact us at [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** OJ Electronics
- **Type:** Industrial Automation > Temperature Control > Thermostat Relays
- **Tags:** EFST-6-221, HVAC relay, industrial automation, OJ Electronics, temperature control, thermostat relay

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Used | 999.00 USD | In stock |

## Images

- OJ Electronics EFST-6-221 Alarm Thermostat Relay - Temperature Control-Ram Automations

---

> Source: [Ram Automations](https://ramautomations.com/products/oj-electronics-efst-6-221-relay)
> Updated: 2026-10-02