Siemens 3RU1126-4DBO | Sirius 3RU1126-4DB0 Thermal Overload Relay, 1NC-1NO Contact
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The 3RU11 thermal overload relays up to 100 A are designed for current-dependent protection of applications with normal start-up conditions against impermissibly high rises in temperature as a result of overload or phase failure. An overload or phase failure causes the motor current to rise above the set rated motor current. This current rise heats up the bimetal strips within the relay via heating elements which, in turn, operate the auxiliary contacts via a tripping mechanism due to their deflection. These switch the load off via a contactor. The switch-off time is dependent on the ratio of tripping current to operational current Ie and is stored in the form of a tripping characteristic with long-term stability. The Tripped state is signalled by means of a switching position indicator. Resetting takes place manually or automatically after a recovery time has elapsed.
Features
- Manual/automatic reset
- Switching position indication
- TEST function
- STOP button
- Phase failure sensitivity
- Integrated, sealable cover
- Size S0
- Class 10
- 20 - 25 A
- Direct mounting with vertical mounting surface /-135 deg rotatable, with vertical mounting surface /- 45 deg tiltable to the front and back
- Optimised to the 3RT contactors such that in addition to individual mounting they can mounted directly mounted onto the contactors to save space
Specifications
| Brand | Siemens |
|---|---|
| MPN | 3RU1126-4DBO |
| Mounting type | Contactor |
| Number of poles | 3 |
| Minimum order qty | 1 |
| Order interval | 1 |
| Contact form | 1NC-1NO |
| Contact rating | 25 A at 690 VAC |
| Dimensions | 97 mm H x 45 mm W x 96 mm D |
| Enclosure type | IP20 |
| Temperature rating | -20 to 70 deg C |
| Terminal type | Threaded |
| Standards and approvals | CCC Certified, CE Certified, CSA Certified, EAC Certified, UL File No. E44653 |
| EAN/UCC-13 | 4011209299627 |
- SKU SIEMENS3RU1126-4DBO
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