{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9988-0AB22","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9988-0AB22","canonicalUrl":"https://aoctrl.com/siemens/3VA9988-0AB22","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0AB22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, electrical alarm switch, changeover contacts type HQ, 7 mm width, 6 A thermal current, accessory for 3VA1/2 breakers.","salesMarkdown":"The Siemens 3VA9988-0AB22 is an electrical alarm switch accessory from the SENTRON family, designed as a changeover contact module type HQ for 3VA1 and 3VA2 molded-case circuit breakers. It mounts directly into the breaker accessory slot — no additional DIN-rail space consumed — and provides remote status indication via its changeover contacts. ## Contact ratings — what the duty codes mean Rated thermal current (Ith) is 6 A, which is the continuous carry capacity in free air. The switching capability depends on the load type and voltage. For AC resistive loads (AC-12), the contacts handle 6 A from 12 V up to 240 V. On DC circuits, the ratings fall with voltage due to the sustained arc. At DC-12 (resistive), the switch carries 6 A at 12 V, 4 A at 24 V, and 2 A at 48 V. At DC-13 (inductive, e.g. DC contactors or relays), it manages 1 A at 12 V, 0.8 A at 24 V, and 0.4 A at 48 V. At higher DC voltages — 110 V and 250 V — the DC-13 rating drops to 0.2 A and 0.1 A respectively. These are the limits for reliable contact life; exceeding them accelerates pitting or welding. ## Integration and physical fit The module is 7 mm wide, 56 mm tall, and 30 mm deep — a single-pole-width footprint that clips into the 3VA breaker's accessory bay. Stripped length for wiring is 15 mm (0.6 in).","metaTitle":"Siemens 3VA9988-0AB22 SENTRON Electrical Alarm Switch, 6 A","metaDescription":"Siemens SENTRON 3VA9988-0AB22 electrical alarm switch with changeover contacts, rated 6 A thermal current. Active production. Sourced to order against RFQ.","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":"6 A","lifecycle_stage":"current","Product Brand Name":"SENTRON","at AC-12 / at 12 V":"6 A","at AC-12 / at 24 V":"6 A","at AC-12 / at 48 V":"6 A","at AC-15 / at 12 V":"3 A","at AC-15 / at 24 V":"3 A","at AC-15 / at 48 V":"3 A","at DC-12 / at 12 V":"6 A","at DC-12 / at 24 V":"4 A","at DC-12 / at 48 V":"2 A","at DC-13 / at 12 V":"1 A","at DC-13 / at 24 V":"0.8 A","at DC-13 / at 48 V":"0.4 A","Degree Of Pollution":"3","Product Designation":"Electrical alarm switch","at AC-12 / at 125 V":"6 A","at AC-15 / at 125 V":"3 A","at DC-12 / at 110 V":"0.5 A","at DC-12 / at 250 V":"0.25 A","at DC-13 / at 110 V":"0.2 A","at DC-13 / at 250 V":"0.1 A","Overvoltage Category":"III","Stripped Length [In]":"0.6 in","Design Of The Product":"Accessories for 3VA circuit breakers","at AC-12 / at 220/240 V":"6 A","at AC-15 / at 220/240 V":"3 A","Surge Voltage Resistance":"4 kV","operating voltage / at DC / rated value / minimum":"250 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/afef09ca3630139eb06a8143ec3119c5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=135080&mlfb=3VA9988-0AB22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9988-0AB22/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA9988-0AB22 and get a price?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment."},{"question":"What is the closest functional second-source for 3VA9988-0AB22?","answer":"The 5SY4140-7 is a different class of device (a miniature circuit breaker, not an alarm switch) and does not share the same function or mounting interface. No direct second-source exists for this accessory; the 3VA9988-0AB22 is specific to the 3VA breaker platform."},{"question":"Will 3VA9988-0AB22 drop into a panel specified around 5SY4140-7?","answer":"No — the 5SY4140-7 is a DIN-rail-mounted miniature circuit breaker, while the 3VA9988-0AB22 is an internal accessory for 3VA molded-case breakers. They serve different mounting locations and functions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9988-0AB22","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/3VA9988-0AB22 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}}