SIRIUS 3RV2The Siemens 3RV2021-4DA10 is a SIRIUS 3RV2 series motor starter protector (circuit breaker) rated 20–25 A with a 55 kA breaking capacity in Size S0. It combines thermal overload and short-circuit protection in a single device, making it a direct fit for motor branch circuit protection in IEC control panel assemblies without a separate overload relay.
The 3RV2021-4DA10 is sized for three-phase motor loads up to 25 A — typically 7.5–11 kW at 400 V. The 55 kA breaking capacity at rated voltage covers the fault levels encountered in low-impedance industrial distribution systems without requiring upstream current-limiting fuses for coordination. Size S0 frames mount directly on standard DIN rails and accept the full range of SIRIUS 3RV2 accessories: auxiliary contacts, shunt trips, and undervoltage releases. Installations requiring UL 508 panel certification benefit from the cULus listing, which validates both the motor branch circuit and the motor controller application in North American markets.
| product brand name | SIRIUS |
|---|---|
| product designation | Circuit breaker |
| design of the product | For motor protection |
| product type designation | 3RV2 |
| Product equipment of circuit breaker for motor protection complete unit with protection device | Yes |
|---|---|
| size of the circuit-breaker | S0 |
| size of contactor can be combined company-specific | S00, S0 |
| product function disconnector functionality | Yes |
| product extension auxiliary switch | Yes |
| power loss [W] for rated value of the current: at AC in hot operating state | 10.5 W |
| type of calculation of power loss current-dependent | quadratic |
| insulation voltage with degree of pollution 3 at AC rated value | 690 V |
| surge voltage resistance rated value | 6 kV |
| maximum permissible voltage for protective separation: in networks with ungrounded star point between main and auxiliary circuit | 400 V |
| protection class IP: on the front according to IEC 60529 | IP20 |
| protection class IP: on the front | IP20 |
| protection class IP: of the terminal | IP20 |
| shock resistance according to IEC 60068-2-27 | 25g / 11 ms |
| mechanical service life (operating cycles): of the main contacts typical | 100 000 |
| mechanical service life (operating cycles): of auxiliary contacts typical | 100 000 |
| electrical endurance (operating cycles) typical | 100 000 |
| reference code according to IEC 81346-2 | Q |
| continuous current rated value | 25 A |
| Substance Prohibitance (day/month/year) | 10/01/2009 |
| installation altitude at height above sea level maximum | 2 000 m |
|---|---|
| ambient temperature: during operation | -20 ... +60 °C |
| ambient temperature: during storage | -50 ... +80 °C |
| ambient temperature: during transport | -50 ... +80 °C |
| temperature compensation | -20 ... +60 °C |
| relative humidity during operation | 10 ... 95 % |
| Part number | 3RV2021-4DA10 |
|---|---|
| Type designation | 3RV2 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4011209712546 |
| ETIM class | EC000074 |
| eCl@ss | 27370401 |
| number of poles for main current circuit | 3 |
|---|---|
| adjustable current response value current of the current-dependent overload release | 18 ... 25 A |
| type of voltage for main current circuit | AC |
| operating voltage: rated value | 690 V |
| operating voltage: at AC-3 rated value maximum | 690 V |
| operating voltage: at AC-3e rated value maximum | 690 V |
| operating frequency rated value | 50 ... 60 Hz |
| operational current rated value | 25 A |
| operational current: at AC-3 at 400 V rated value | 25 A |
| operational current: at AC-3e at 400 V rated value | 25 A |
| at AC-3: at 230 V rated value | 5.5 kW |
| at AC-3: at 400 V rated value | 11 kW |
| at AC-3: at 500 V rated value | 15 kW |
| at AC-3: at 690 V rated value | 22 kW |
| at AC-3e: at 230 V rated value | 5.5 kW |
| at AC-3e: at 400 V rated value | 11 kW |
| at AC-3e: at 500 V rated value | 15 kW |
| at AC-3e: at 690 V rated value | 22 kW |
| operating frequency: at AC-3 maximum | 15 1/h |
| operating frequency: at AC-3e maximum | 15 1/h |
| type of voltage for auxiliary and control circuit | AC/DC |
|---|---|
| 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 |
|---|---|
| product function: phase failure detection | Yes |
| trip class | CLASS 10 |
| design of the overload release | thermal |
| protection function thermal overload protection (ANSI 49) | Yes |
| maximum short-circuit current breaking capacity (Icu): at AC at 240 V rated value | 100 kA |
| operating short-circuit current breaking capacity (Ics) at AC: at 240 V rated value | 100 kA |
| response value current of instantaneous short-circuit trip unit | 325 A |
| full-load current (FLA) for 3-phase AC motor: at 480 V rated value | 25 A |
|---|---|
| full-load current (FLA) for 3-phase AC motor: at 600 V rated value | 25 A |
| for single-phase AC motor: at 110/120 V rated value | 2 hp |
| for single-phase AC motor: at 230 V rated value | 3 hp |
| for 3-phase AC motor: at 200/208 V rated value | 5 hp |
| for 3-phase AC motor: at 220/230 V rated value | 7.5 hp |
| for 3-phase AC motor: at 460/480 V rated value | 15 hp |
| UL File Number (CCN) | E47705 (NLRV, NLRV7), E156943 (NKJH, NKJH7) |
| 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 | gL/gG 63 A |
| certificate of suitability according to ATEX directive 2014/34/EU | DMT 02 ATEX F 001 |
| type of protection according to ATEX directive 2014/34/EU | Ex II (2) GD |
| mounting position | any |
|---|---|
| fastening method | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Mounting method of circuit breaker for Transformer protection, Generator protection and system protection optional standard bar mounting | Yes |
| height | 97 mm |
| width | 45 mm |
| depth | 97 mm |
| with side-by-side mounting: forwards | 0 mm |
| with side-by-side mounting: backwards | 0 mm |
| with side-by-side mounting: upwards | 50 mm |
| with side-by-side mounting: downwards | 50 mm |
| with side-by-side mounting: at the side | 0 mm |
| for grounded parts: forwards | 0 mm |
| for grounded parts: backwards | 0 mm |
| for grounded parts: upwards | 50 mm |
| for grounded parts: at the side | 30 mm |
| for grounded parts: downwards | 50 mm |
| for live parts: forwards | 0 mm |
| for live parts: backwards | 0 mm |
| for live parts: upwards | 50 mm |
| for live parts: downwards | 50 mm |
| for live parts: at the side | 30 mm |
| for grounded parts at 400 V: downwards | 30 mm |
| for grounded parts at 400 V: upwards | 30 mm |
| for grounded parts at 400 V: at the side | 9 mm |
| for live parts at 400 V: downwards | 30 mm |
| for live parts at 400 V: upwards | 30 mm |
| for live parts at 400 V: at the side | 9 mm |
| for grounded parts at 500 V: downwards | 30 mm |
| for grounded parts at 500 V: upwards | 30 mm |
| for grounded parts at 500 V: at the side | 9 mm |
| for live parts at 500 V: downwards | 30 mm |
| for live parts at 500 V: upwards | 30 mm |
| for live parts at 500 V: at the side | 9 mm |
| for grounded parts at 690 V: downwards | 50 mm |
| for grounded parts at 690 V: upwards | 50 mm |
| for grounded parts at 690 V: backwards | 0 mm |
| for grounded parts at 690 V: at the side | 30 mm |
| for grounded parts at 690 V: forwards | 0 mm |
| for live parts at 690 V: downwards | 50 mm |
| for live parts at 690 V: upwards | 50 mm |
| for live parts at 690 V: backwards | 0 mm |
| for live parts at 690 V: at the side | 30 mm |
| for live parts at 690 V: 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 | Top and bottom |
| for main contacts: solid or stranded | 2x (1 ... 2.5 mm2), 2x (2.5 ... 10 mm2) |
| for main contacts: finely stranded with core end processing | 2x (1 ... 2.5 mm2), 2x (2.5 ... 6 mm2), 1x 10 mm2 |
| for main contacts: for AWG cables for main contacts | 2x (16 ... 12), 2x (14 ... 8) |
| connectable conductor cross-section for main contacts: solid or stranded | 1 ... 10 mm2 |
| connectable conductor cross-section for main contacts: finely stranded with core end processing | 1 ... 10 mm2 |
| AWG number as coded connectable conductor cross section for main contacts | 16 ... 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 size 2 |
| design of the thread of the connection screw: for main contacts | M4 |
| device type according to ISO 13849-1 | 3 |
|---|---|
| overdimensioning according to ISO 13849-2 necessary | Yes |
| safety device type according to IEC 61508-2 | Type A |
|---|---|
| T1 value: for proof test interval or service life according to IEC 61508 | 10 a |
| protection class IP on the front according to IEC 60529 | IP20 |
|---|---|
| touch protection on the front according to IEC 60529 | finger-safe, for vertical contact from the front |
| display version for switching status | Handle |
|---|
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 2.68 kg |
|---|
| Net weight | 0.346 kg |
|---|---|
| Package dimensions | 104 × 98 × 53 mm |
| Country of origin | DE |
| Shipping weight | 0.846 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 30 Oct 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of 3RV2 is 25 A.
The EAN (GTIN) of 3RV2 is 4011209712546.
3RV2 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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