--- title: "ABB Thermal Overload Relay: A Comprehensive Guide from Models to Applications" date: 2025-09-10T08:31:00Z modified: 2025-09-23T07:17:23Z permalink: "https://www.simplybuyglobal.com/blog/motor-control/overload-relay/abb-thermal-overload-relay-guide-models-to-applications/" type: post status: publish excerpt: "" wpid: 3529 categories: - overload relay tags: - overload relay - ABB featured_image: "https://www.simplybuyglobal.com/wp-content/uploads/2025/09/cb30677e-6653-4585-88ab-5f78c96aa282.webp" featured_image_alt: "ABB Thermal Overload Relay: A Comprehensive Guide from Models to Applications banner" timestamp: 2025-09-23T07:17:23Z --- An ABB thermal overload relay is designed to [protect motors against overheating](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/taxonomy/product_cat/motor-control.md), phase loss, and abnormal loads. When current exceeds safe limits, these relays trip and disconnect the motor before damage occurs. Industrial buyers value ABB for its wide product portfolio, consistent quality, and availability across global markets. At Simply Buy, we combine deep ABB product knowledge with flexible logistics solutions. With overseas warehouses and trusted shipping networks, we help customers in Africa, the Middle East, and beyond cut delivery times significantly while ensuring genuine ABB overload relay models are always within reach. ## **ABB Thermal Overload Relay Overview** ABB offers multiple overload relay ranges suited for light, medium, and heavy-duty applications. Whether you need compact relays for small motors or high-capacity protection for industrial systems, ABB’s lineup covers it. Key features across the ABB overload relay family include: - **Trip classes 10 and 20** for different motor starting times - **Phase loss sensitivity** for balanced protection - **[Manual/auto reset options](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/post/automatic-vs-manual-reset-overload-relays.md)** for flexible maintenance - **Auxiliary contacts** for control signaling (typically 95-96 NC, 97-98 NO) - **Test/stop functions** to [simplify troubleshooting](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/post/how-to-safely-reset-overload-relay.md) For engineers and procurement teams, the [ABB thermal overload relay catalogue](https://library.e.abb.com/public/8489ed224735e6cac1256faf0028b970/2CDC106014C0201.pdf) provides model selection tables, technical data, and accessories. ## **ABB TA2X Thermal Overload Relays** [![](https://www.simplybuyglobal.com/wp-content/uploads/2025/09/70210212-da3f-4de0-af0c-74b4cc39bf2c-1.png) ](https://www.simplybuyglobal.com/product/abb-ta2x-thermal-overload-relays-1645/) The ABB thermal overload relay TA series includes the TA2X range, widely used for protecting motors across 0.1–80A. Known for reliability and flexibility, these relays mount directly onto [ABB contactors](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/post/motor-starter-contactor-guide.md) and provide consistent trip response. **Standard features include:** - Adjustable current setting - Trip class 10 protection - Test/stop button for quick checks - Auxiliary contacts (1NO + 1NC) - Long service life (1 million operations) **Popular models include:** - ABB thermal overload relay ta TA2X1-0.16 (0.1–0.16A, class 10). - TA2X1-11 (7.5–11A, class 10). - TA2X1-32 (24–32A). - TA2X3-80 (60–80A). See full specs here: [ABB TA2X Thermal Overload Relays](https://www.simplybuyglobal.com/product/abb-ta2x-thermal-overload-relays-1645/) ## **ABB TA25DU and Related Relays** The ABB thermal overload relay TA25DU is one of the most versatile in the series. Built for industrial motors, it provides both class 10 and class 20 trip options, making it adaptable to varying start-up demands. [![](https://www.simplybuyglobal.com/wp-content/uploads/2025/09/image-44.png) ](https://www.simplybuyglobal.com/product/abb-ta-thermal-overload-relays-1647/) Key highlights: - Current ranges from 0.1A to 200A - Sensitive to phase loss and imbalance - Dual reset modes (manual/auto) - Free-trip mechanism for safety - Temperature-compensated performance (-25°C to +55°C) The family also includes TA42DU, TA75DU, TA110DU, and TA200DU, extending coverage for higher-rated motors and demanding environments. Explosion-safe variants (V1000) add protection for hazardous areas. View models here: [ABB TA Thermal Overload Relays](https://www.simplybuyglobal.com/product/abb-ta-thermal-overload-relays-1647/) [![](https://www.simplybuyglobal.com/wp-content/uploads/2025/09/image-46.png) ](https://www.simplybuyglobal.com/product/abb-tf-thermal-overload-relays-1643/) ## **ABB TF Thermal Overload Relays** The ABB thermal overload relay TF series is designed for precision and compatibility with AF-series contactors. It provides compact, robust protection up to 42A–140A. **Features include:** - ABB thermal overload relay tf42 models with ranges from 0.1–40A. - Phase loss sensitivity for imbalanced loads. - Manual/auto reset options. - Test/stop button and front-mounted trip indicator. - Reliable temperature compensation. These relays are ideal for OEMs, building automation, and compact control panels where space and accuracy matter. Explore models: [ABB TF Thermal Overload Relays](https://www.simplybuyglobal.com/product/abb-tf-thermal-overload-relays-1643/) ## **Applications and Trip Classes** ABB thermal overload relays aren’t limited to one type of setup. They’re used anywhere motors need dependable protection from overheating, phase loss, or overload. Here are some of the most common applications you’ll find in the field: ### HVAC Systems Heating, ventilation, and air-conditioning motors are prone to phase loss and voltage imbalance. With abb overload relay protection, blowers and chillers stay safe from overheating, ensuring continuous operation in commercial and residential projects. ### Water and Wastewater Treatment Pumps in treatment plants often face overload from clogging. ABB relays like the ta25du and tf42 provide [reliable motor protection](https://www.simplybuyglobal.com/relay-supplier-for-all-types/), keeping systems compliant and preventing failures. ### Compressors and Refrigeration Compressors experience heavy start-up currents. Relays with trip class 20 give these motors the extra protection they need, tripping only when actual damage risk appears. This is critical in food processing and cold storage facilities. ### Mining and Heavy Equipment In high-load sectors such as mining, motors drive crushers, conveyors, and hoists. ABB’s tf series relays, with their wide adjustment range and durability, safeguard these critical systems even in harsh conditions. ABB relays are typically available in ABB thermal overload relay class 10 (fast response) and ABB thermal overload relay trip class 20 (longer motor start-up). [Choosing the right trip class](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/post/schneider-overload-relay-selection-chart-guide.md) depends on the load profile and motor type. [Get Free Quote](https://www.simplybuyglobal.com/contact/) ## **Why Source ABB Relays from Simply Buy?** When sourcing overload relays, it’s not just about the product — it’s about trust, speed, and support. At Simply Buy, we provide: - **Complete ABB range coverage** (TA2X, TA25DU, TF42, and more). - **Deep product knowledge** to match relays with your exact motor specs. - **Flexible logistics**, with overseas warehouses for fast deliveries across Africa and the Middle East. - **100% authenticity guarantee**, eliminating risks of counterfeit or substandard relays. Ready to source ABB overload relays? [Browse our full range today](https://www.simplybuyglobal.com/wp-content/uploads/wp-mfa-exports/taxonomy/product_cat/abb.md) and get fast, authentic supply backed by Simply Buy’s expertise. 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