IPB120N04S404ATMA1 Datasheet, Stock, Price, Equivalent and RFQ Guide

Answer first: IPB120N04S404ATMA1 should be sourced through an evidence-led RFQ, not through a static stock or price promise. Start from the SENICO product reference at IPB120N04S404ATMA1, confirm the manufacturer path through Infineon Technologies, and keep the request tied to SENICO product categories. Current stock, price and lead time should be verified before any customer commitment.

Exact sourcing answer

The controlled identity is Infineon 40 V MOSFET sourcing for the 120N04 S404 ATMA1 lane with 120N04 current/voltage class, S404 segment and ATMA1 route, 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 IPB120N04S4L02ATMA1, IPB120N04S404ATMA2, IPB180N04S401ATMA1 and other 40 V OptiMOS 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

S404 should remain separate from S4L02 and S401 rows because resistance, gate charge and package-route assumptions may change.

ATMA1 should stay visible because ATMA2 or other route suffixes can alter packing and receiving evidence.

The 120N04 class should not be widened to 180N04 or lower-current rows without thermal and current-margin review.

Ask whether the design is limited by 40 V margin, conduction loss, switching waveform, thermal pad behavior or customer AVL history.

Supplier replies should include full Infineon code, reel label photo, lot/date-code range, package condition, source ownership and warranty.

If S4L02 material is proposed, document changed segment and loss-bin impact before price comparison.

If IPB180N04S401ATMA1 is offered, keep it in an engineering-review lane until current and thermal differences are approved.

Receiving should compare S404ATMA1 against purchase order, invoice and label evidence.

If exact stock is partial, separate exact quantity, factory lead time and same-family review candidates.

A lower-price 40 V row should not outrank missing S404 identity, ATMA1 proof or weak source ownership.

For repeat builds, store accepted segment boundaries and rejected alternatives beside the BOM record.

Customer-facing substitute notes should state current class, segment, route and approval changes before any alternate is presented.

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 IPB120N04S404ATMA1, keep the 120N04 class, S404 generation marker and ATMA1 packing route tied to the full Infineon orderable number. Supplier lists may group S402, S403, S404, S406, ATMA1 and nearby 40 V MOSFET rows, so the RFQ should request complete code evidence, package and top-marking photos, label wording, reel or cut-tape condition, date-code range, traceability paperwork and source route before the offer is treated as exact material.

Replacement review should compare voltage margin, RDS(on), current capability, gate charge, drive condition, thermal behavior, switching loss, footprint and customer AVL status. A similar S40x row can help shortage research, but suffix and route evidence decide whether it can move beyond discovery.

Keep S404 and ATMA1 decisions distinct from S402/S406 alternates.

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.