ABB Overload Relays

Overload relays protect motors from sustained overcurrent while tolerating normal starting inrush. ABB's TF and T ranges are thermal bimetallic relays that mount directly onto matching AF contactors, while the EF range is electronic, offering a much wider setting band per device plus phase-loss detection and selectable trip classes.

TF, T & EF Overload Relays we supply

• ABB EF1250DU-1250 — EF1250DU-1250 Overload Relay
• ABB EF146-1501 — EF146-1501 Overload Relay
• ABB EF19-0.32 — EF19-0.32 Overload Relay
• ABB EF19-1.0 — EF19-1.0 Overload Relay
• ABB EF19-18.9 — EF19-18.9 Overload Relay
• ABB EF19-2.7 — EF19-2.7 Overload Relay
• ABB EF19-6.3 — EF19-6.3 Overload Relay
• ABB EF205-2101 — EF205-2101 Overload Relay
• ABB EF370-3801 — EF370-3801 Overload Relay
• ABB EF45-30 — EF45-30 Overload Relay
• ABB EF45-45 — EF45-45 Overload Relay
• ABB EF460-500 — EF460-500 Overload Relay
• ABB EF65-561 — EF65-561 Overload Relay
• ABB EF65-701 — EF65-701 Overload Relay
• ABB EF750-800 — EF750-800 Overload Relay
• ABB EF96-1001 — EF96-1001 Overload Relay
• ABB EF96-561 — EF96-561 Overload Relay
• ABB T16-0.13 — T16-0.13 Overload Relay
• ABB T16-0.17 — T16-0.17 Overload Relay
• ABB T16-0.23 — T16-0.23 Overload Relay
• ABB T16-0.31 — T16-0.31 Overload Relay
• ABB T16-0.41 — T16-0.41 Overload Relay
• ABB T16-0.55 — T16-0.55 Overload Relay
• ABB T16-0.74 — T16-0.74 Overload Relay
• ABB T16-10 — Overload Relay
• ABB T16-1.0 — T16-1.0 Overload Relay
• ABB T16-1.3 — Overload Relay
• ABB T16-13 — T16-13 Overload Relay
• ABB T16-16 — T16-16 Overload Relay
• ABB T16-1.7 — T16-1.7 Overload Relay
• ABB T16-2.3 — T16-2.3 Overload Relay
• ABB T16-3.1 — T16-3.1 Overload Relay
• ABB T16-4.2 — T16-4.2 Overload Relay
• ABB T16-5.7 — T16-5.7 Overload Relay
• ABB T16-7.6 — T16-7.6 Overload Relay
• ABB TF140DU-110 — TF140DU-110 Overload Relay
• ABB TF140DU-110-V10001 — TF140DU-110-V10001 Overload Relay
• ABB TF140DU-135 — TF140DU-135 Overload Relay
• ABB TF140DU-135-V10001 — TF140DU-135-V10001 Overload Relay
• ABB TF140DU-142 — TF140DU-142 Overload Relay
• ABB TF140DU-142-V10001 — TF140DU-142-V10001 Overload Relay
• ABB TF140DU-90 — TF140DU-90 Overload Relay
• ABB TF140DU-90-V10001 — TF140DU-90-V10001 Overload Relay
• ABB TF42-0.13 — TF42-0.13 Overload Relay
• ABB TF42-0.17 — TF42-0.17 Overload Relay
• ABB TF42-0.23 — TF42-0.23 Overload Relay
• ABB TF42-0.31 — TF42-0.31 Overload Relay
• ABB TF42-0.41 — TF42-0.41 Overload Relay

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What to check before ordering

• The setting range must bracket the motor's full-load current, with the operating point away from either extreme.
• Match the relay frame to the contactor it mounts on — a relay for an AF09 will not fit a larger frame.
• Choose the trip class for the load: Class 10 for normal starts, Class 20 or 30 for high-inertia loads.
• Electronic EF relays cover a far wider current band per part number, which reduces the number of spares to hold.

Frequently asked questions

Thermal or electronic overload relay?

Thermal TF relays are cheaper and perfectly adequate for standard direct-on-line starting. Electronic EF relays give a much wider setting range on one part number, phase-loss protection and consistent tripping regardless of panel temperature — worth it in hot panels or where you want to cut spares variety.

Will the relay mount on my contactor?

TF and T relays are designed to mount directly onto matching AF contactor frames.

What trip class do I need?

Class 10 suits most direct-on-line motors. High-inertia loads — large fans, centrifuges, crushers — take longer to reach speed and need Class 20 or 30 to avoid tripping during a normal start.

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