SIEMENS
Circuit breaker S0 size for motor protection, Class 10, A-release 34–40 A, N-release 480 A, screw terminal, standard switching capacity.
The Siemens 3RV2021-4FA10 Motor Protection Circuit Breaker is engineered for precise and dependable motor safeguarding. Designed in a compact S0 frame size, this circuit breaker integrates overload and short-circuit protection in one streamlined unit. The Class 10 trip class, 34–40 A thermal release range, and 480 A magnetic release make it ideal for motors requiring fast and efficient shutdown during malfunction.
This model supports standard switching capacity, making it suitable for general industrial applications. Its screw terminal design ensures strong electrical connectivity and easy installation, enhancing reliability and minimizing downtime. Whether used for new installations or upgrades, the 3RV2021-4FA10 provides the safety and performance expected from Siemens industrial technologies.
Reliable Motor Protection: Prevents overloads, short circuits, and phase failures.
Adjustable Thermal Release (34–40 A): Ensures flexible configuration based on motor load.
High Standard Switching Capacity: Suitable for demanding industrial settings.
Compact S0 Size: Saves panel space and simplifies installation.
Durable Construction: Ensures long lifespan in harsh environments.
Easy Wiring: Screw-terminal design allows secure and straightforward connection.
Overload protection
Short-circuit protection
Manual motor switching (ON/OFF)
Trip protection with Class 10 characteristics
Industrial motor control systems
Pump control panels
Conveyor systems
HVAC motors
Machine automation equipment
Manufacturing plants
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| SKU / Model | 3RV2021-4FA10 |
|---|---|
| Brand | SIEMENS |
| product brand name | SIRIUS |
| product designation | Circuit breaker |
| design of the product | For motor protection |
| product type designation | 3RV2 |
| size of the circuit-breaker | S0 |
| size of contactor can be combined company-specific | S00, S0 |
| product extension auxiliary switch | Yes |
| power loss [W] for rated value of the current | - |
| ● at AC in hot operating state | 16.25 W |
| ● at AC in hot operating state per pole | 5.4 W |
| insulation voltage with degree of pollution 3 at AC rated value | 690 V |
| surge voltage resistance rated value | 6 kV |
| maximum permissible voltage for safe isolation in networks with grounded star point | - |
| ● between main and auxiliary circuit | 400 V |
| shock resistance acc. to IEC 60068-2-27 | 25g / 11 ms |
| mechanical service life (switching cycles) | - |
| ● of the main contacts typical | 100 000 |
| ● of auxiliary contacts typical | 100 000 |
| electrical endurance (switching cycles) typical | 100 000 |
| type of protection according to ATEX directive 2014/34/EU | Ex II (2) GD |
| certificate of suitability according to ATEX directive 2014/34/EU | DMT 02 ATEX F 001 |
| reference code acc. to IEC 81346-2 | Q |
| installation altitude at height above sea level maximum | 2 000 m |
| ambient temperature | - |
| ● during operation | -20 ... +40 °C |
| ● during storage | -50 ... +80 °C |
| ● during transport | -50 ... +80 °C |
| temperature compensation | -20 ... +60 °C |
| relative humidity during operation | 10 ... 95 % |
| number of poles for main current circuit | 3 |
| adjustable current response value current of the current-dependent overload release | 34 ... 40 A |
| operating voltage | - |
| ● rated value | 20 ... 690 V |
| ● at AC-3 rated value maximum | 690 V |
| operating frequency rated value | 50 ... 60 Hz |
| operational current rated value | 40 A |
| operational current at AC-3 at 400 V rated value | 40 A |
| operating power at AC-3 | - |
| ● at 230 V rated value | 11 kW |
| operating frequency at AC-3 maximum | 15 1/h |
| number of NC contacts for auxiliary contacts | 0 |
| number of NO contacts for auxiliary contacts | 0 |
| number of CO contacts for auxiliary contacts | 0 |
| product function | - |
| ● ground fault detection | No |
| ● phase failure detection | Yes |
| trip class | CLASS 10 |
| design of the overload release | thermal |
| breaking capacity operating short-circuit current (Ics) at AC | - |
| ● at 240 V rated value | 100 kA |
| ● at 400 V rated value | 10 kA |
| ● at 500 V rated value | 3 kA |
| ● at 690 V rated value | 2 kA |
| breaking capacity maximum short-circuit current (Icu) | - |
| ● at AC at 240 V rated value | 100 kA |
| ● at AC at 400 V rated value | 20 kA |
| ● at AC at 500 V rated value | 6 kA |
| ● at AC at 690 V rated value | 3 kA |
| response value current of instantaneous short-circuit trip unit | 480 A |
| full-load current (FLA) for 3-phase AC motor | - |
| ● at 480 V rated value | 40 A |
| ● at 600 V rated value | 40 A |
| yielded mechanical performance [hp] | - |
| ● for single-phase AC motor | - |
| — at 110/120 V rated value | 3 hp |
| — at 230 V rated value | 7.5 hp |
| ● for 3-phase AC motor | - |
| — at 200/208 V rated value | 10 hp |
| — at 220/230 V rated value | 10 hp |
| — at 460/480 V rated value | 30 hp |
| product function short circuit protection | Yes |
| design of the short-circuit trip | magnetic |
| design of the fuse link for IT network for short-circuit protection of the main circuit | - |
| ● at 400 V | gG 63 A |
| ● at 500 V | gG 63 A |
| ● at 690 V | gG 63 A |
| mounting position | any |
| fastening method | screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715 |
| required spacing | - |
| ● for grounded parts at 400 V | - |
| ● for live parts at 400 V | - |
| ● for grounded parts at 500 V | - |
| ● for live parts at 500 V | - |
| ● for grounded parts at 690 V | - |
| ● for live parts at 690 V | - |
| — downwards | 70 mm |
| — upwards | 70 mm |
| — backwards | 0 mm |
| — at the side | 30 mm |
| — forwards | 0 mm |
| product component removable terminal for auxiliary and control circuit | No |
| type of electrical connection | - |
| ● for main current circuit | screw-type terminals |
| arrangement of electrical connectors for main current circuit | Top and bottom |
| type of connectable conductor cross-sections | - |
| — solid or stranded | 2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²) |
| — finely stranded with core end processing | 2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm² |
| ● at AWG cables for main contacts | 2x (16 ... 12), 2x (14 ... 8) |
| tightening torque | - |
| ● for main contacts with screw-type terminals | 2 ... 2.5 N·m |
| design of screwdriver shaft | Diameter 5 to 6 mm |
| size of the screwdriver tip | Pozidriv 2 |
| design of the thread of the connection screw | - |
| ● for main contacts | M4 |
| B10 value | - |
| proportion of dangerous failures | - |
| ● with high demand rate acc. to SN 31920 | 50 % |
| failure rate [FIT] | - |
| ● with low demand rate acc. to SN 31920 | 50 FIT |
| T1 value for proof test interval or service life acc. to IEC 61508 | 10 y |
| protection class IP on the front acc. to IEC 60529 | IP20 |
| touch protection on the front acc. to IEC 60529 | finger-safe, for vertical contact from the front |
| display version for switching status | Handle |
| For use in hazardous locations | Test Certificates Declaration of Conformity |
| last modified: | 11/30/2021 |
| Weight | 0.404 kg |
| Dimensions | 49.00 × 102.00 × 102.00 mm |
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