Adjustable motor protection for the 3UA59 platform, identified in Siemens documentation as 3UA5940-1J.
The Siemens 3UA59 40-1J is an adjustable thermal overload relay for protecting three-phase motor circuits against sustained overload conditions. Siemens certification identifies the normalized catalogue format as 3UA5940-1J: the 3UA59 family, open-type code 40, and 1J setting range. The relay provides phase-failure sensitivity, manual or automatic reset selection, test operation, and one normally closed plus one normally open auxiliary contact. Its 6.3–10.0 A adjustment range supports matched motor-current setting during panel assembly or replacement. Before ordering, compare the complete marking, setting range, mounting arrangement, terminal details, and existing contactor or starter configuration.
| Item | Stockoems Information |
|---|---|
| Product Condition | Original new |
| Availability | In stock |
| Warranty | With 1 year warranty |
Condition, availability and warranty are Stockoems commercial terms and are not manufacturer commitments.
| Parameter | Verified Value |
|---|---|
| Manufacturer | Siemens |
| Customer-visible Part Number | 3UA59 40-1J |
| Official Catalogue Format | 3UA5940-1J |
| Product Type | Adjustable thermal overload relay |
| Series | 3UA59 |
| Current Setting Range | 6.3–10.0 A |
| Auxiliary Contacts | 1 NC + 1 NO |
| Phase-Failure Sensitivity | Yes |
| Rated Insulation Voltage | 690 V AC |
| Protection Degree | IP20 |
| Permissible Ambient Temperature | −25 °C to +55 °C |
| Mounting | 35 mm DIN rail or two-screw separate mounting |
Motor current passes through the relay’s thermal sensing path. Sustained overload or phase failure causes the auxiliary contacts to change state for starter control.
Manual or automatic reset selection supports maintenance practice, while the test control allows functional checking of the auxiliary contact circuit.
DIN-rail or separate screw mounting permits installation within coordinated motor starter and control-panel assemblies.
For order review, provide clear photographs of the front setting dial, complete side label, terminal markings, and the full installed relay. The visible code should be compared with both the customer search format 3UA59 40-1J and Siemens catalogue format 3UA5940-1J.
For this listing, 3UA59 40-1J is the customer search format. Siemens documentation uses the normalized configuration 3UA5940-1J.
The Siemens certification nomenclature assigns suffix 1J to a 6.3–10.0 A full-load current setting range.
The 3UA59 certification data specifies one normally closed and one normally open auxiliary contact.
The 3UA59 operating instructions describe selectable manual or automatic reset. Confirm the required mode during commissioning.
Check the complete part number, current range, mounting, auxiliary wiring, reset mode, contactor or starter fit, and label condition.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
Structured order review for Siemens 3UA59 40-1J, from model verification through documented after-sales communication.
| Stage | Service Check | Purpose |
|---|---|---|
| 1 | Model and suffix verification | Compare the requested search format with the complete Siemens catalogue code. |
| 2 | Condition confirmation | Confirm the quoted condition and visible product state. |
| 3 | Technical compatibility review | Review range, mounting, starter fit and auxiliary wiring requirements. |
| 4 | Product and label photo confirmation | Use clear visual evidence before shipment approval. |
| 5 | Protective packaging | Protect terminals, controls and enclosure surfaces for transit. |
| 6 | Worldwide shipping / Shipment tracking | Coordinate the selected route and provide shipment tracking after dispatch. |
| 7 | Customs documentation | Prepare shipment documents according to the confirmed order and destination. |
| 8 | Written warranty terms | Record the applicable Stockoems warranty terms with the transaction. |
| 9 | Return authorization process | Review evidence and provide an authorization path when a return is eligible. |
| 10 | After-sales response | Maintain traceable communication for order and product questions. |
The order review checks the visible model, suffix, setting markings, terminals and general product condition.
Protective materials are selected to reduce movement and shield vulnerable controls and terminals.
Shipment coordination covers routing, tracking and the confirmed destination requirements without promising an unverified delivery date.
Written records support warranty questions, return review and responsive post-delivery communication.
Ask the supplier to preserve the complete manufacturer code, provide clear product and label photos, state condition and warranty terms in writing, and explain how compatibility is reviewed. A qualified supplier should separate manufacturer facts from its own commercial terms, keep order communication traceable, describe packing and logistics procedures, and provide a defined return authorization process.
Risk signals include missing suffixes, specifications copied from a similar model, unclear condition, refusal to provide label evidence, unsupported lifecycle claims, vague warranty language, pressure to pay before identity checks, and promises of exact stock quantities or delivery dates without verification.
Share the complete code, quantity, destination and clear label photographs for a structured commercial and compatibility review.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
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Models were randomly selected from the customer-provided TXT lists. Only exact Stockoems product matches are linked; unlinked entries remain plain text.
Email: sales6@apterpower.com | WhatsApp: +86 18159889985
