Siemens 3RV2742-5GD10 is a SIRIUS 3RV2 circuit breaker for system protection and non-motor loads in accordance with UL 489 and CSA C22.2 No. 5. The size S3 device has a 40 A rated current, a non-adjustable 40 A thermal release and a 520 A instantaneous electronic release.
The three-pole breaker uses screw terminals and is intended for coordinated low-voltage distribution assemblies. Protective-device selection must be based on the system voltage, prospective short-circuit current, conductor data and applicable approval requirements.
| Complete part number | 3RV2742-5GD10 |
| Manufacturer | Siemens AG |
| Product family | SIRIUS 3RV2 |
| Product designation | Circuit breaker for system protection |
| Official documentation | Siemens IC 10 catalog and exact breaking-capacity confirmation |
| Lifecycle wording | Not confirmed for this complete model |
| Rated current | 40 A |
| Thermal overload release | 40 A, non-adjustable |
| Instantaneous short-circuit release | 520 A |
| Size / mounting | S3; any mounting position; DIN-rail or screw mounting |
| Main circuit | 3 poles; 20–600 V AC; 50–60 Hz |
| Breaking capacity | 65 kA at 480Y/277 V; official confirmation: 100 kA at 460 V, 15 kA at 525 V, 10 kA at 690 V |
| Connection system | Screw terminals; main conductors connected at top and bottom |
| Insulation / surge withstand | 1000 V insulation voltage; 8 kV rated impulse withstand |
| Ambient / protection | −20 to +60 °C operation; IP20 front; maximum altitude 2000 m |
| Dimensions / net weight | Approximately 170 × 70 × 176 mm; approximately 2.26 kg |
No exact Siemens lifecycle wording was confirmed for the complete order number 3RV2742-5GD10 in the accessible official records. Siemens current catalogs identify the exact model, but this page does not infer Active, Discontinued or Obsolete status. Reconfirm lifecycle and successor guidance with Siemens using the complete order number.
It is a size S3 SIRIUS 3RV2 three-pole circuit breaker for UL/CSA system protection applications.
The breaker is rated 40 A, with a fixed 40 A thermal release and a 520 A instantaneous release.
The exact 3RV2742-5GD10 version uses screw terminals for the main current circuit.
Siemens identifies the 3RV2 family as the successor platform, but panel fit, approvals and coordination still require engineering verification.
Confirm the exact suffix, system voltage, fault level, conductor size, S3 mounting space and applicable UL/CSA requirements.
Send the full 3RV2742-5GD10 order number, system voltage, fault level and conductor data for review.
Protection-device review centered on rated current, breaking capacity, terminal fit and approval requirements.
We compare system voltage, prospective fault current, release values and protection coordination.
We check the complete order number, 40 A rating, S3 housing and screw-terminal design.
We prepare suitable packaging and confirm international delivery details for the exact circuit breaker.
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