{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7138-4FR00-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7138-4FR00-0AA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7138-4FR00-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7138-4FR00-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC DP, ET200S electronics module 1F-RO 24 V DC/AC 24..230V/5A, 30 mm width, 1 relay output (2 NO), SIL 3 / PL e / Cat 4.","salesMarkdown":"The 6ES7138-4FR00-0AA0 is a single-channel relay output module for the ET200S distributed I/O system, designed specifically for fail-safe applications. It provides one relay output with two normally-open contacts, rated for 5 A continuous current (thermal continuous current, max. 5 A) and capable of switching both 24 V DC and 24...230 V AC loads. The module achieves SIL 3, Performance Level e, and Category 4 — but only when the control signal comes from a fail-safe digital output (F-DO). ## Load voltage and wiring constraints for the relay contacts The relay output is rated for a signal '1' minimum load current of 5 mA — switching dry contacts below this threshold may not reliably wet the circuit. Maximum switching frequency is 2 Hz with resistive load and 0.1 Hz with inductive load, so this module is not intended for high-speed cycling. Load voltage L+ draws up to 100 mA from the control voltage supply (without load). The module draws a maximum of 10 mA from the backplane bus. Galvanic isolation exists between channels and backplane bus, and between channels and load voltage L+. Cable length is limited to 200 m for both shielded and unshielded runs — the same limit applies regardless of shielding, which is unusual and suggests the limiting factor is the relay coil drive, not noise immunity. ## Current derating and thermal limits across ambient temperature The module delivers 6 A per channel up to 50 °C ambient, derating to 5 A at 60 °C (with the caveat that voltage is limited to max. 24.8 V at the higher temperature). Total module current is capped at 8 A maximum. Power loss is 2.1 W typical — this is the heat the module dumps into the ET200S rail. In a dense cabinet, check that the total rail dissipation stays within the terminal module's thermal budget.","metaTitle":"Siemens 6ES7138-4FR00-0AA0 ET200S Safety Relay Output, SIL 3","metaDescription":"Siemens 6ES7138-4FR00-0AA0 ET200S electronics module, 1 relay output 5A, 24V DC/24-230V AC, SIL 3/PL e/Cat 4. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Digital Output Modules"],"specifications":{"Depth":"52 mm","Width":"30 mm","title":"6ES7138-4FR00-0AA0","Height":"81 mm","description":"SIMATIC DP, Electronics module 1F-RO 24 V DC/AC 24..230V/5A, f. ET200S, 30 mm overall width, 1 relay output (2 NO) Output current 5 A, load voltage 24 V DC and 24...230 V AC, Can be used up to Category 4 (EN 954-1)/ SIL3 (IEC61508)/PLE (ISO13849), if control takes place F-DO (e.g. 6ES7138-4FB02-0AB0) F-DQ","With Packing":"2 bit","Shielded, Max.":"200 m","acc. to EN 954":"4","Weight, approx.":"90 g","lifecycle_stage":"current","Power loss, typ.":"2.1 W","Rated value (DC)":"24 V; Supply via fail-safe output, e.g. of an F-DO","Unshielded, Max.":"200 m","up to 40 °C, max.":"6 A","up to 50 °C, max.":"6 A","up to 60 °C, max.":"5 A; up to max. 24.8 V","Between The Channels":"Yes","SIL acc. to IEC 61508":"Up to SIL 3","Type of digital output":"Relays","Current per module, max.":"8 A","Short-circuit protection":"No","Number of digital outputs":"1","With Inductive Load, Max.":"0.1 Hz","With Resistive Load, Max.":"2 Hz","For Signal \"1\" Rated Value":"5 A","Controlling a digital input":"Yes","Address space per module, max.":"1 byte","Thermal continuous current, max.":"5 A","from backplane bus 3.3 V DC, max.":"10 mA","For Signal \"1\" Minimum Load Current":"5 mA","Between The Channels And Backplane Bus":"Yes","Status indicator digital output (green)":"Yes","Between the channels and load voltage L+":"Yes; between channels and control voltage","from load voltage L+ (without load), max.":"100 mA; from control voltage","Performance level according to ISO 13849-1":"e"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$84.70 – $238.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5444c2a6d45e12e1a825e1259ff12c7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=187885&mlfb=6ES7138-4FR00-0AA0"},"ai":{"faq":[{"question":"Is 6ES7138-4FR00-0AA0 compatible with my existing ET200S station?","answer":"Yes — it is a standard ET200S electronics module with 30 mm width, fitting any ET200S terminal module. It requires a fail-safe digital output (F-DO) on the same rail to achieve its safety ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7138-4FR00-0AA0","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/6ES7138-4FR00-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}