Technical illustration. Representative component image; exact configuration and appearance may vary. Images are for reference only. The supplied part’s appearance may differ.
1SAZ311201R1001 — TA42DU-25 Thermal Overload Relay 18 ... 25 A
relayPart number: 1SAZ311201R1001
ABB TA42DU-25 (1SAZ311201R1001) is a three-pole bimetal thermal overload relay with an adjustable 18–25 A setting range and trip class 10A. It provides overload and phase-loss protection for motors, with selectable manual or automatic reset, a trip indicator and one NO plus one NC auxiliary contact.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ311201R1001 |
| Category | Electrical & controls |
| Published component description | TA42DU-25 Thermal Overload Relay 18 ... 25 A |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Current setting range | 18–25 A |
| Trip class | 10A |
| Main circuit poles | 3 |
| Auxiliary contacts | 1 normally open and 1 normally closed |
| Reset | Selectable manual or automatic |
| Main circuit rated operational voltage | 690 V AC (IEC/EN) |
| Operating ambient temperature | −25 to +55 °C, open and compensated without derating |
| Rated frequency | DC, 50/60 Hz |
| Weight | 0.335 kg |
Catalogue information may contain errors or be out of date. Full specifications and verified details are available on request. Confirm the part number and equipment fitment with us before ordering.
Product questions
What is the current setting range and trip class of the TA42DU-25?
ABB lists an adjustable setting range of 18–25 A and trip class 10A for part 1SAZ311201R1001. Check the motor nameplate and application requirements before selecting the relay.
What protection does this thermal overload relay provide?
The three-pole bimetal relay provides motor overload protection and is sensitive to phase loss. The overload relay requires appropriate separate short-circuit protection.
Does the TA42DU-25 offer manual and automatic reset?
Yes. Manual or automatic reset can be selected. It also has a trip indicator, test and stop functions, and one normally open and one normally closed auxiliary contact.
Can the relay be mounted directly to my contactor?
ABB documentation lists direct mounting on A30, A40 and BC30 contactors, and a separate mounting kit for the TA42DU. Confirm the exact contactor model, equipment details and serial number before ordering; suitability for other arrangements is not established here.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.