{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9988-0AB23","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9988-0AB23","canonicalUrl":"https://aoctrl.com/siemens/3VA9988-0AB23","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0AB23","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA9988-0AB23 electrical alarm switch, changeover contacts type HQ (7 mm), electronic-component accessory for 3VA1/2 breakers, 0.3 A rated current.","salesMarkdown":"The Siemens 3VA9988-0AB23 is a SENTRON electrical alarm switch — a 7 mm wide accessory that mounts directly on 3VA1 and 3VA2 molded-case circuit breakers to provide remote indication of breaker trip or alarm conditions. It uses changeover contacts (type HQ) for signaling to a PLC, annunciator, or safety relay. ## Switching capability by load type Rated at 0.3 A across AC-12 and AC-15 at both 12 V and 24 V — meaning it can handle resistive and lightly inductive control loads at panel voltages. For DC circuits, the rating drops: 0.1 A at DC-12 (resistive), and 0.07 A at DC-13 (solenoid/relay loads) at 24 V. That 0.07 A DC-13 figure is the limiting case for most industrial control loops; if your PLC input or relay coil draws more, this switch won't break it reliably. ## Insulation coordination and mounting The 7 mm width means it snaps into the breaker's accessory slot without consuming additional DIN rail space. Depth is 30 mm, height 56 mm, so it stays within the breaker envelope.","metaTitle":"Siemens 3VA9988-0AB23 SENTRON Alarm Switch, 7mm, 0.3A","metaDescription":"Siemens 3VA9988-0AB23 SENTRON electrical alarm switch with changeover contacts for 3VA breakers. 7mm wide, rated 0.3A at AC-15/24V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"30 mm","Width":"7 mm","Height":"56 mm","Maximum":"16","Minimum":"20","Accessories":"Electrical alarm switch","Stripped Length":"15 mm","Thermal Current":"0.3 A","lifecycle_stage":"current","Product Brand Name":"SENTRON","at AC-12 / at 12 V":"0.3 A","at AC-12 / at 24 V":"0.3 A","at AC-15 / at 12 V":"0.3 A","at AC-15 / at 24 V":"0.3 A","at DC-12 / at 12 V":"0.1 A","at DC-12 / at 24 V":"0.1 A","at DC-13 / at 12 V":"0.07 A","at DC-13 / at 24 V":"0.07 A","Degree Of Pollution":"3","Product Designation":"Electrical alarm switch","Overvoltage Category":"III","Stripped Length [In]":"0.6 in","Design Of The Product":"Accessories for 3VA circuit breakers","Surge Voltage Resistance":"4 kV","operating voltage / at DC / rated value / minimum":"24 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3eb038627cf958c45cbbf267a278bf34.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=379304&mlfb=3VA9988-0AB23","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0AB23/alternatives.json"},"ai":{"faq":[{"question":"What is the switching capacity of 3VA9988-0AB23 on a 24 VDC control circuit?","answer":"At 24 VDC, the alarm switch is rated 0.1 A for DC-12 (resistive) and 0.07 A for DC-13 (inductive solenoid loads). For AC control circuits at 24 V, it handles 0.3 A at AC-15."},{"question":"Where can I buy 3VA9988-0AB23?","answer":"This part is sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time."},{"question":"What breakers does the 3VA9988-0AB23 fit?","answer":"It is designed as an electronic-component accessory for the Siemens SENTRON 3VA1 and 3VA2 molded-case circuit breakers. It mounts in the breaker's accessory slot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9988-0AB23","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/3VA9988-0AB23 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}}