{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2936-1BD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2936-1BD00","canonicalUrl":"https://aoctrl.com/siemens/3RT2936-1BD00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2936-1BD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2936-1BD00 surge suppressor, varistor design, 127-240 V AC 50/60 Hz, 150-250 V DC, for 3RT2.3 and 3RT2.4 contactors, clip-on mounting.","salesMarkdown":"## What it is — and why the varistor matters The 3RT2936-1BD00 is a SIRIUS surge suppressor for Siemens contactors — specifically a varistor type, meaning it clamps voltage spikes across the coil terminals rather than using an RC snubber or diode. That matters in a panel: a varistor handles both AC and DC coils (: AC/DC) and doesn't introduce a half-wave rectification issue that can hold a DC contactor in on loss of phase. Rated for 127-240 V AC at 50/60 Hz, and 150-250 V DC. The overlap between the AC and DC ranges means one part number covers both a 230 V AC coil and a 220 V DC coil in the same cabinet — fewer line items on the BOM. ## Fits 3RT2.3 and 3RT2.4 — clip-on, any orientation This suppressor mounts directly onto the contactor via clip-on fastening. No screws, no DIN-rail space consumed — it snaps onto the coil terminals of size S2 or S3 contactors (: 3RT2.3 and 3RT2.4). The mounting position is any orientation, so you can install it on a contactor mounted sideways or upside-down in a tight cabinet without derating. Dimensions are compact: 30 mm wide, 30 mm tall, 15 mm deep. That 15 mm depth is the projection off the contactor face — check clearance to the enclosure door or adjacent components if you're packing the panel tight. ## Active lifecycle — no obsolescence worry Siemens lists this as an active product. No NRND flag, no last-time-buy notice. For a BOM freeze or a panel-builder buying multiple cabinets, the supply chain risk here is low — it's a current catalog item, not a legacy part you're chasing through surplus. RoHS compliance is confirmed with a substance prohibition date of 10/01/2014, which covers the EU RoHS directive. ## Temperature tolerance — panel environment matters Operating range is -25 to +60 °C, storage range -40 to +80 °C. The -25 °C low end means it's fine for unheated warehouses in most climates, but if you're in a northern plant with ambient below that at startup, the varistor's clamping voltage shifts with temperature — it still functions but the protection threshold rises. Storage at -40 °C is fine; let the assembly warm before energizing to avoid thermal shock on the ceramic disc inside the varistor.","metaTitle":"Siemens 3RT2936-1BD00 Surge Suppressor, Varistor","metaDescription":"Siemens 3RT2936-1BD00 SIRIUS surge suppressor, varistor type, 127-240 V AC 50/60 Hz, 150-250 V DC. Active production, fits 3RT2.3/3RT2.4 contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"15 mm","Width":"30 mm","at DC":"150 ... 250 V","title":"3RT2936-1BD00","Height":"30 mm","at 50 Hz":"127 ... 240 V","at 60 Hz":"127 ... 240 V","description":"surge suppressor, varistor, 127-240 V AC, 50/60 Hz, 150-250 V DC, for contactors 3RT2.3 and 3RT2.4","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"clip-on","Mounting Position":"any","Size Of Contactor":"S2, S3","Product Brand Name":"SIRIUS","Product Designation":"surge suppressor","Substance Prohibitance (Date)":"10/01/2014","Design Of The Surge Suppressor":"Varistor","Type Of Voltage Of The Control Supply Voltage":"AC/DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.69","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a43d39817cdbed88051a4a23f381585f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=108667&mlfb=3RT2936-1BD00"},"ai":{"faq":[{"question":"What contactors does the 3RT2936-1BD00 fit?","answer":"It fits Siemens 3RT2.3 and 3RT2.4 contactors (size S2 and S3 per). The clip-on mounting attaches directly to the coil terminals — no additional hardware or DIN rail needed."},{"question":"What voltage ratings does the 3RT2936-1BD00 cover?","answer":"127-240 V AC at 50/60 Hz, and 150-250 V DC. The AC and DC ranges overlap, so one part covers both a 230 V AC coil and a 220 V DC coil in the same panel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2936-1BD00","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/3RT2936-1BD00 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}}