{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-0CA15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-0CA15","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-0CA15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0CA15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1021-0CA15, 0.25 A continuous rated current, CLASS 10 trip class, 100 kA breaking capacity at 400 V AC, screw-type terminals, IP20 front protection.","salesMarkdown":"## What this SIRIUS breaker does on the line Its continuous rated current is 0.25 A, and it trips in CLASS 10 — meaning it will open within 10 seconds at 7.2× the set current, fast enough to protect a standard induction motor rotor from thermal damage during a stall or locked-rotor condition. That 0.25 A rating makes this the fine-end of the SIRIUS range, sized for fractional-horsepower motors, small pumps, or control transformers. It accepts solid conductors 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²), and stranded 2x (1...2.5 mm²) and 2x (2.5...6 mm²). Mounting position is any, with 0 mm spacing required backwards and at the sides. ## Breaking capacity and fault clearance Rated breaking capacity is 100 kA at 240 V, 400 V, 500 V, and 690 V AC (–). That's a consistent 100 kA across the voltage range — unusual and valuable, because it means the breaker clears a bolted fault at 690 V just as decisively as at 240 V, without derating its interrupting capability. For a motor branch circuit, this SCCR headroom simplifies panel coordination: downstream contactors and overloads don't need separate current-limiting fuses in most installations. ## Environmental and mechanical ruggedness Shock resistance rated at 25g for 11 ms — that's a solid spec for a breaker mounted on a machine frame or near a reciprocating compressor. ## Protection functions and auxiliary wiring Ground fault detection is not included. An auxiliary switch is present, with 0 factory-fitted auxiliary contacts for the main current circuit — the transverse auxiliary switch design means you add auxiliary blocks on the side as needed. Switching frequency at AC-3 duty is rated at a maximum 15 operations per hour. Mechanical endurance of the main contacts is 100,000 operations typical. Width is 45 mm, height is 97 mm, depth is 96 mm. The 96 mm depth includes the terminal body and any protruding screw heads; panel depth should allow at least 110 mm clearance behind the door for wiring access.","metaTitle":"Siemens 3RV1021-0CA15 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV1021-0CA15 SIRIUS motor protection circuit breaker, 0.25 A continuous, CLASS 10 trip, 100 kA breaking at 400 V. Screw terminals, phase failure detection, IP20 front. Quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","Maximum":"2 000 m","at 24 V":"1 A","at 60 V":"0.15 A","Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)","at 230 V":"0.5 A","Backwards":"0 mm","Trip class":"CLASS 10","At The Side":"0 mm","Rated Value":"690 V","On The Front":"IP20","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Shock resistance":"25g / 11 ms","Mounting position":"any","Product brand name":"SIRIUS","Product designation":"circuit breaker","at 400 V rated value":"0.06 kW","Design of the product":"for motor protection","For Auxiliary Contacts":"0","Ground fault detection":"No","Phase failure detection":"Yes","For Main Current Circuit":"screw-type terminals","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"100 kA","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"5.5 W","Continuous current rated value":"0.25 A","Design of the auxiliary switch":"transverse","at AWG conductors for main contacts":"2x (14 ... 10)","Surge voltage resistance rated value":"6 000 V","at AC in hot operating state per pole":"1.8 W","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (18 ... 14)","For Auxiliary And Control Current Circuit":"screw-type terminals","Removable Terminal For Auxiliary And Control Circuit":"No","Design of the overcurrent release and short-circuit release":"thermomagnetic","Arrangement of electrical connectors for main current circuit":"front side","Adjustable pick-up value current of the current-dependent overload release":"0.18 ... 0.25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=95801&mlfb=3RV1021-0CA15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0CA15/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1021-0CA15 at 400 V?","answer":"Rated breaking capacity is 100 kA at 400 V AC, and the same 100 kA applies at 240 V, 500 V, and 690 V AC."},{"question":"Can 3RV1021-0CA15 replace 3RV1011-0GA10 without rewiring?","answer":"Both are SIRUS motor protection breakers with the same 45 mm width and screw-type terminals, but the 3RV1021-0CA15 has a 0.25 A continuous rating versus the 3RV1011-0GA10's different rating. Verify the motor full-load amps match the new breaker's setting range before substitution; physical DIN-rail fit is identical."},{"question":"Where can I buy 3RV1021-0CA15 and how is it quoted?","answer":"This part is sourced through independent industrial distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What conductor sizes does 3RV1021-0CA15 accept?","answer":"Solid conductors: 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²). Stranded conductors: 2x (1...2.5 mm²) and 2x (2.5...6 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-0CA15","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RV1021-0CA15 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}