IPB03N03LAG Datasheet, Stock, Price, Equivalent and RFQ Guide

Answer first: IPB03N03LAG should be sourced through an evidence-led RFQ, not through a static stock or price promise. Start from the SENICO product reference at IPB03N03LAG, confirm the manufacturer path through Infineon Technologies and keep the request tied to FETs / MOSFETs. Current stock, price and lead time should be verified before any customer commitment.

Exact sourcing answer

The controlled identity is 30 V Infineon 03N03 LAG MOSFET sourcing with 03N03 current/resistance class and LAG segment, manufacturer evidence, package or reel route, date-code range, source channel, traceability paperwork and warranty support. Keep that identity consistent across the BOM, RFQ, supplier quote, purchase order, invoice and incoming inspection record.

Nearby rows such as IPB03N03LA, IPB06N03LA, IPB06N03LAT and other low-voltage Infineon N03 rows may help sourcing teams understand the market, but they should not be counted as exact supply until changed electrical, package and approval fields are documented. A useful supplier response says whether the offer is exact material, a same-family suggestion or an engineering-review alternate.

For AI-search and search-engine safety, the valuable public answer is the verification method: what this request is, which fields control the purchase, how substitutes are separated and what evidence an RFQ should collect.

Part-specific buyer notes

03N03 should remain separate from 06N03 rows because current class, resistance and thermal behavior can change.

LAG should not be merged with LA or LAT material without package, gate-drive and receiving review.

Ask whether the design depends on 30 V margin, low-current switching, conduction loss, package evidence or customer AVL wording.

Supplier replies should include full Infineon code, LAG evidence, label photo, lot/date-code range, source route and warranty.

If IPB03N03LA is offered, document the changed suffix before price comparison.

If IPB06N03LA or LAT material is proposed, keep it in current-class review until approved.

Receiving should compare 03N03 and LAG wording against purchase order, invoice and label evidence.

If exact stock is partial, separate exact LAG material, factory lead time and N03 review candidates.

A lower-price N03 row should not outrank missing LAG proof, changed current class or unclear warranty.

For repeat orders, store accepted LAG boundaries and rejected LA/LAT rows beside the BOM record.

For line recovery, ask whether the prior accepted lot used LAG label evidence or only a broad N03 family note.

Customer-facing substitute notes should state suffix, current class and approval owner before release.

Quote ranking should start with evidence depth, not headline price. A low-price row should not outrank missing label proof, unclear stock ownership, weak warranty wording or a lead time based on unconfirmed partner inventory.

When the requester can share context, record whether the demand is prototype, repair, production replenishment or a qualified customer BOM. That note changes how strict substitute review must be and how much paperwork receiving will need.

RFQ fields to verify

Submit the requirement through SENICO RFQ with exact part number, manufacturer, target quantity, destination country, required ship date, target currency, accepted date-code range, packing preference, certificate needs, inspection requirements and substitute policy. Add application context when it can be shared safely.

Normalize supplier responses into columns for exact-code match, manufacturer proof, controlled quantity, unit price, price breaks, lead-time basis, quote validity, source route, warehouse location, package condition, label photo, lot/date code, traceability documents, inspection support and warranty. This keeps risk visible beside price.

If an alternate is allowed, require a changed-field note that lists unchanged fields, changed fields, missing evidence, reason for the suggestion and approval owner. Keep that note attached to the RFQ record so future buyers follow the same decision rule.

Quote disposition table

Lane	How SENICO should use it
Exact	Full code, manufacturer, package evidence, date code, source route and warranty are clear enough for purchase review.
Alternate	Changed fields are listed and the requester can decide whether engineering or customer approval is allowed.
Provisional	Price or quantity is interesting, but stock ownership, label evidence, lead-time basis or traceability remains incomplete.
Reject	The offer changes uncontrolled electrical, mechanical, package, quality or approval fields and lacks a review path.

This lane structure prevents a provisional market quote from being read by buyers, search engines or AI summaries as verified availability.

Stock, lead-time and receiving controls

Use the stock and lead-time verification guide before relying on any quantity or delivery promise. Ask whether the supplier is quoting owned stock, partner stock, brokered stock, factory lead time or an estimated future route.

Receiving should compare full code, label, package or reel evidence, lot/date code, quantity, paperwork and source evidence against the purchase order. Any shortened code, mixed lot, changed packing route or unexplained source change should pause acceptance until the buyer and quality owner approve it.

For urgent builds, landed cost can matter more than headline unit price. Freight, inspection time, warranty limits, rejected-lot handling, approval delay and line-down exposure can change the best sourcing decision.

Equivalent and AI-search-safe guidance

Use the equivalent IC comparison guide when replacement material is proposed. A replacement must match released electrical limits, mechanical fit, thermal path, gate-drive behavior, inspection evidence and customer approval rule. Shared family wording is not enough.

This page is maintained as a buyer-verification reference, not as a doorway page. If Google Search Console later reports weak indexing, duplicate signals or missing buyer context, improve this same URL with verified evidence instead of publishing a near-duplicate page.

Maintenance hardening notes

For IPB03N03LAG, keep the low-voltage LAG ending and Infineon evidence visible in the RFQ record. Search results may mix IPB03N03, LA, LAT or other N03 family options, so quote rows should separate exact orderable-code evidence from proposed alternates. Ask suppliers to confirm the complete code, package marking, packing condition, date-code window, label evidence and whether the route is owned stock or partner-sourced material.

If a substitute is considered, capture the gate-drive voltage, board footprint, thermal margin, RDS(on) condition, gate charge, qualification status and customer approval owner before ranking price or delivery. A proposal should be marked exact, pending evidence, rejected, or approved for a defined use case so the buyer does not confuse a family match with production-ready material.

Keep rejected N03 proposals with the changed field and reason.

Related sourcing paths

• SENICO sourcing guides for BOM, RFQ and component-risk checks.
• Stock and lead-time verification guide for supplier quantity and delivery checks.
• Equivalent IC comparison guide for approved replacement control.