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ABB / TA-TF SERIES
TA25DU-1.8M
Thermal Overload Relay
PRODUCT ID
1SAZ211201R2025
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MOTOR PROTECTION / THERMAL OVERLOAD
Adjustable 1.30–1.80 A Protection
The ABB TA25DU-1.8M is a three-pole thermal overload relay designed for motor protection against overload and phase-failure conditions. Its adjustable current range is 1.30–1.80 A and its trip class is 10A.
3 POLES 10A CLASS 1.8 A Ie
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KEY FUNCTIONS
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ELECTRICAL CHARACTERISTICS
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PROTECTION FUNCTIONS
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AUXILIARY CIRCUIT
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ENVIRONMENT & CONSTRUCTION
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The TA25DU-M family uses different current-setting ranges while retaining the same basic thermal-overload relay concept. Selecting the correct range is important because the relay must correspond to the motor operating current and the selected starter arrangement.
| MODEL | SETTING RANGE | TRIP CLASS | ORDER CODE | APPLICATION POSITION |
| TA25DU-0.63M | 0.40–0.63 A | 10A | 1SAZ211201R2017 | Lower-current motors |
| TA25DU-1.0M | 0.63–1.00 A | 10A | 1SAZ211201R2021 | Lower-current motors |
| TA25DU-1.8M | 1.30–1.80 A | 10A | 1SAZ211201R2025 | Target model |
| TA25DU-2.4M | 1.70–2.40 A | 10A | 1SAZ211201R2028 | Higher-current motors |
| TA25DU-3.1M | 2.20–3.10 A | 10A | 1SAZ211201R2031 | Higher-current motors |
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CURRENT MATCH
The motor operating current should fall within the selected relay setting range.
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CONTACTOR MATCH
The overload relay must be paired with the appropriate contactor arrangement.
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RESET CONTROL
Manual or automatic reset should reflect the intended machine restart behavior.
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05 / COMMERCIAL SUPPORT
TA25DU-1.8M Inquiry & Order Support
For an ABB TA25DU-1.8M inquiry, please provide the exact product ID, required quantity, destination, required date and the machine or starter application. For replacement requirements, confirming the existing contactor and current setting range helps avoid a mismatch.
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AMIKON SALES MANAGER
Miya Zheng
Direct Contact
✉ sales@amikon.cn ◈ WhatsApp: +86 180 2077 6792
Please include Part Number, Quantity, Destination, Required Date and Machine/System when requesting a quotation.
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AFTER-SALES
Return / Replacement
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1. Please contact us within 7 days if you have any question after you receiving the items.
2. The returned items has to be in its original condition, specific reason for the return, we will issue a return or replacement for your order after we received the returns.
3. The buyer is responsible for all the shipping cost incurred.
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01
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How should the TA25DU-1.8M current setting be selected for a replacement motor starter?
The TA25DU-1.8M has an adjustable setting range of 1.30–1.80 A. The selected setting should correspond to the motor application and the applicable protection and coordination requirements. The relay should not be selected simply because its maximum value is 1.8 A; the actual motor operating current and starter configuration need to be checked.
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02
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Can the TA25DU-1.8M be mounted directly to an ABB AX contactor?
Yes, the TA25DU-M family is designed for direct mounting on compatible block contactors, and ABB identifies the TA25DU-M range for AX09 through AX40 contactors. The exact contactor and starter combination should still be checked before replacement because the relay is part of the complete motor-starter arrangement.
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03
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When would a buyer choose TA25DU-1.8M instead of TA25DU-1.4M or TA25DU-2.4M?
The distinction is primarily the current-setting range. TA25DU-1.4M covers 1.00–1.40 A, TA25DU-1.8M covers 1.30–1.80 A, and TA25DU-2.4M covers 1.70–2.40 A. Therefore, the correct choice depends on the required motor-current setting and not merely on the physical similarity of the relays.
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04
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What should be considered when choosing manual or automatic reset on TA25DU-1.8M?
TA25DU-1.8M allows manual or automatic reset selection. Manual reset can be appropriate where a restart after an overload event requires operator intervention, while automatic reset may be used where the control design specifically permits automatic recovery. The chosen mode should follow the machine's restart and safety requirements.
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05
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Why is the TA25DU-1.8M auxiliary contact arrangement important during replacement?
The TA25DU-1.8M provides one normally closed and one normally open auxiliary contact. These contacts can participate in the starter control and trip-signalling circuits. When replacing an existing relay, the control-circuit wiring and the required contact function should therefore be checked so that the replacement preserves the intended stop, trip and signal logic.
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