{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VFDB4045","brand":"Delta","brandSlug":"delta","productSlug":"VFDB4045","canonicalUrl":"https://aoctrl.com/delta/VFDB4045","factsUrl":"https://aoctrl.com/api/mcp/products/VFDB4045","rawCanonicalId":null},"summary":{"shortDescription":"Delta VFDB Braking Unit, VFDB4045, 400—800VDC input, 45 kW max motor capacity, wall-mounted enclosed type IP50.","salesMarkdown":"## What this braking unit does The VFDB4045 is a DC-bus braking unit for VFD applications, sized for a 45 kW motor load. It connects across the 400—800 VDC bus of a compatible drive and dumps regenerative energy into an external resistor bank. The IP50 wall-mount enclosure keeps dust out but isn't rated for washdown — mount it inside the panel or in a clean electrical room. The 400—800 VDC input range covers common 400 V and 480 V class drives with a DC bus that typically sits around 560–680 VDC under load. The 45 kW motor capacity is the maximum induction motor size this unit can decelerate — oversizing the braking unit relative to the drive is fine, but undersizing it for the motor will trip the overvoltage fault on decel. Minimum equivalent resistor of 13.6 Ω per unit sets the floor on the external resistor value; going lower risks overcurrent on the braking transistor.","metaTitle":"VFDB4045 Braking Unit, 400–800 VDC, 45 kW, IP50","metaDescription":"VFDB4045 braking unit for 45 kW motors, 400–800 VDC input, IP50 wall-mount enclosure. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["AC Drives (VFD)"],"specifications":{"title":"VFDB4045","Product No.":"VFDB4045","description":"VFDB Braking Units","Input Rating":"400—800VDC","Product type":"VFDB Braking Units","Shipping weight":"5Kg","lifecycle_stage":"current","Dimensions (LxWxH)":"12.1cm x 13cm x 20cm","Estimated Lead Time":"4 - 6 weeks.","Max. Motor Capacity (KW)":"45","Mechanical Configuration":"Wall-mounted enclosed type IP50","Min. Equivalent Resistor for Each Braking Unit":"13.6O"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$278.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/31a7df20ea9b7859feb4b645694ac7be.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the input voltage range for VFDB4045?","answer":"The DC bus input is rated for 400—800 VDC, which covers 400 V and 480 V class drives. The actual bus voltage under load will be within that window."},{"question":"Where can I buy VFDB4045 and get current pricing?","answer":"Sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What size motor does VFDB4045 handle?","answer":"Rated for a maximum motor capacity of 45 kW. Match the braking unit to the motor size — oversizing is safe, undersizing will cause overvoltage trips on deceleration."},{"question":"What is the minimum external resistor value for VFDB4045?","answer":"Minimum equivalent resistor for each braking unit is 13.6 Ω. Do not use a resistor below this value — it will exceed the braking transistor's current rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/delta/VFDB4045","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/delta/VFDB4045 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}}