{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA6870-4AB","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA6870-4AB","canonicalUrl":"https://aoctrl.com/siemens/3RA6870-4AB","factsUrl":"https://aoctrl.com/api/mcp/products/3RA6870-4AB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA6870-4AB PE pick-up, plug-in fixing, 63 A at 400 V AC, 15 x 60 x 32 mm, screw-type terminals.","salesMarkdown":"## PE pick-up for SIRIUS motor starters — 63 A, 15 mm wide The Siemens 3RA6870-4AB is a protective earth (PE) pick-up module in the SIRIUS motor starter family, rated for 63 A operational current at 400 V AC. It provides a dedicated PE tap connection for the main circuit, allowing the protective earth conductor to be wired directly to the motor starter assembly rather than looped through a separate terminal block. At 15 mm wide, this module occupies one single-width slot on the DIN rail, matching the footprint of the SIRIUS 3RA2 contactor assemblies it pairs with. The plug-in fixing means it snaps onto the rail without tools and locks in place — no mounting screws needed. In a motor starter circuit, this matches the full-load current of motors up to roughly 30 kW at 400 V (assuming typical power factor and efficiency). The screw-type terminals accept conductors from 16 mm² down to 10 mm² for the load-side outgoing feeder, with a stripped length of 10 mm and tightening torque of 2 to 2.5 N·m. Pollution degree 3 means the module is rated for industrial environments where conductive dust or occasional condensation may occur — typical for motor control centers (MCCs) and panel shops. The operating temperature range of -20 to +60 °C covers most indoor industrial installations without derating, though the 2000 m maximum altitude should be noted for high-elevation sites. ## Active production — sourcing this part For panel builders and MRO buyers: this PE pick-up is a standard line item in the SIRIUS 3RA2/3RA6 system, so lead times typically align with the broader SIRIUS portfolio. No official successor or cross-reference exists — it is the current production part for this function. ## Environmental and mechanical qualification The module is qualified for shock resistance to semi-sinusoidal 6 m/s² at 10 ms and vibration resistance per the profile: 4 to 5.8 Hz at 15 mm displacement, then 5.8 to 500 Hz at 2 m/s² acceleration, 10 cycles. This covers machine-mounted applications such as conveyors, pumps, and compressors where the starter sees mechanical stress from the driven equipment. Storage and transport temperature range is -55 to +80 °C, which is standard for SIRIUS components and allows for unheated warehouse storage or container shipping. The functional designation per EN 61346-2 and IEC 81346-2 is 'X', indicating a protective earth component in the equipment identification scheme.","metaTitle":"Siemens 3RA6870-4AB SIRIUS PE pick-up, 63 A, 15 mm wide","metaDescription":"Siemens 3RA6870-4AB SIRIUS PE pick-up, rated 63 A at 400 V AC, 15 mm wide, plug-in DIN rail mount. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"32mm","Width":"15mm","title":"3RA6870-4AB","Height":"60mm","description":"PE tap Connection main circuit: screw terminal","During Storage":"-55 ... +80°C","lifecycle_stage":"current","During Operation":"-20 ... +60°C","During Transport":"-55 ... +80°C","Fastening Method":"plug-in fixing","Shock Resistance":"Semi-sinusoidal a = 6 m/s2 at 10 ms; 3 pos. and 3 neg. Shock in all axes","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"PE pick-up","Vibration Resistance":"f = 4 to 5.8 Hz; d = 15 mm; f = 5.8 to 500 Hz; a = 2 m / s2 10 cycles","according to EN 61346-2":"X","according to IEC 81346-2":"X","Stripped Length For Main Contacts":"10mm","operational current at AC at 400 V rated value":"63A","For Main Contacts For Load-Side Outgoing Feeder":"2 x (16 ... 10), 1 x (16 ... 8)","Design Of Screw-Type Connection For Main Contacts":"M3","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Installation Altitude At Height Above Sea Level Maximum":"2 000m","Tightening Torque For Main Contacts With Screw-Type Terminals":"2 ... 2.5N·m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.67","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/47cbf295a72e3cb6e6877c8b4db81463.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=20539&mlfb=3RA6870-4AB"},"ai":{"faq":[{"question":"What is the width and depth of the 3RA6870-4AB?","answer":"The 3RA6870-4AB has a width of 15 mm, a height of 60 mm, and a depth of 32 mm. The 15 mm width means it occupies one standard SIRIUS slot on the DIN rail."},{"question":"What compliance standards does the 3RA6870-4AB meet?","answer":"The module is designed for pollution degree 3 per IEC 60947-1, suitable for industrial environments. It carries functional designation 'X' per EN 61346-2 and IEC 81346-2 for protective earth components. The operating temperature range is -20 to +60 °C, and it is rated for installation at altitudes up to 2000 m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA6870-4AB","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/3RA6870-4AB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}