YURUNOX · Automotive component identity and sourcing control
How to Read Infineon Automotive Part Numbers
Do not start by decoding characters. First identify whether the string is an Infineon Salesname, Orderable Part Number (OPN), SP number, or package top mark. Then use the nomenclature for that exact product family and reconcile the full OPN, SP mapping, qualification, package, grade, packing, and current documentation before purchasing.
The quick answer: read the identity in layers
Infineon does not publish one universal character-by-character decoder for every automotive portfolio. A modern automotive MOSFET, AURIX™ MCU, TRAVEO™ MCU, MOTIX™ motor-control IC, and OPTIREG™ regulator can each use a different Salesname syntax. Acquired product lines may retain their historical naming conventions.
Layer 1: decode the readable Salesname only with the correct family document. Layer 2: identify the adapted Salesname and final five OPN characters. Reconciliation: connect that OPN to the SP number and verify the exact product page, datasheet, package, qualification, status, packing, label, and change notices.
| What you have | What it usually tells you | What it cannot prove alone | Next document |
|---|---|---|---|
| Salesname | Functional configuration under a family-specific nomenclature | Unique order configuration, packing, or every production variant | Family datasheet or naming guide, then product page |
| OPN | Adapted Salesname plus five suffix characters; unique 1:1 relationship to an SP number | The plain-language reason behind the final two-character designator | Infineon OPN page, exact product record, PCN/PD if variants differ |
| SP number | Infineon's non-descriptive order-relevant vendor level | Function without a lookup | Current Infineon mapping to Salesname and OPN |
| Package top mark | Abbreviated on-device identity plus possible lot/date/site fields | Full OPN, packing quantity, or supply-chain provenance by itself | Official marking table plus packing label and traceability record |
Basis: Infineon's current Orderable Part Number guide. Technical review date: 28 August 2026.
Salesname, OPN, SP number, and top mark are related—not interchangeable
Salesname
The human-readable product name. Its characters may encode voltage, memory, package, temperature, feature set, or another family-specific attribute.
OPN
An adapted Salesname with no spaces or dashes, followed by five characters for environment, packing, size, and a variant designator.
SP number
A non-speaking vendor number. Multiple SP numbers can sit below one Salesname; the OPN gives each a descriptive, unique counterpart.
Top mark
A short physical marking sized for the package. It must be matched with official marking information, label data, and the approved order identity.
This hierarchy explains a common sourcing failure. A supplier may quote a familiar Salesname while its warehouse item is stored under an OPN or SP number. The incoming device may carry only a short top mark. If the buyer records only one layer, a real difference can look like a harmless formatting variation—or a correct shipment can look wrong.
A visible package name is still not a complete order identity
The component body can show a manufacturer mark, device code, lot, and date information, but small packages cannot carry every OPN and packing attribute in human-readable form. Infineon says the OPN appears in field 50P of the 2D barcode on the packing label.
Receiving should therefore reconcile the purchase order, supplier paperwork, barcode data, and official marking table. A top-mark match without label and chain-of-custody evidence is incomplete; a missing full OPN on the package body is not automatically a defect.
How the five-character Infineon OPN suffix works
The OPN is limited to 24 characters. Its first portion is an adapted Salesname: spaces, dashes, and other special characters are removed, and Infineon documents additional adaptation rules for some microcontrollers. The last five characters carry order-level information.
Example segmentation of the documented OPN TLS850B0TEV50ATMA1. Do not reuse its letters as a universal lookup table; verify the current translation table and exact product record.
| Position | Official role | Buyer interpretation | Do not assume |
|---|---|---|---|
| 1st suffix character | Combined RoHS, halogen, and totally lead-free status | Confirm the full combination and any applicable material declaration or exemption | “RoHS compliant” automatically means “totally lead-free” |
| 2nd character | Packing type combined with moisture-protection packing | Screen reel, tray, tube, dry/non-dry, or another published combination | A familiar letter always means the same complete handling condition |
| 3rd character | Packing-size class | Distinguish configurations, then read the actual quantity on the product page or quote | The letter equals an exact piece count without lookup |
| 4th + 5th characters | Product-variant designator | Preserve exactly and investigate any difference through product documentation, notices, or Infineon | A1/A2 is always only a reel code or always technically equivalent |
Infineon increments the final designator when a new SP number is created without changing the Salesname or the first three suffix identifiers. The cause can involve a customer-specific version, test flow, ROM code, temperature range, wafer or bonding-wire difference, design step, or another product distinction. The designator tells you that the SP-level identity differs; it does not explain why.
Use this seven-step decoding and approval workflow
- Capture the complete evidence set.Copy the string exactly. Photograph the device top mark and all packing labels. Retain the supplier quote, SP number, barcode/data-matrix content, lot, date code, and country/site data.
- Classify the identifier.Decide whether each string is a Salesname, OPN, SP number, package mark, customer part number, or sample identifier. Do not compare unlike levels.
- Find the exact Infineon family.Search the official product site and identify whether the part belongs to automotive MOSFET, AURIX, TRAVEO, MOTIX, OPTIREG, memory, sensor, or another portfolio.
- Decode only published Salesname fields.Use the current datasheet or nomenclature table for that family. Treat any undocumented character as a lookup key—not an invitation to guess.
- Separate the OPN suffix.Apply Infineon's adapted-Salesname rules, then check the final five characters against the current OPN guide and exact product attributes.
- Verify order and change control.Confirm the 1:1 OPN–SP relationship, product status, design step, PCN/PD history, qualification, package drawing, temperature/quality grade, MSL, packing, and environmental declarations.
- Freeze the approved configuration.Store Salesname, OPN, SP number, package, grade, allowed step, packing, current document revisions, and traceability requirements as separate linked fields. Never reduce approval to a wildcard family name.
Four documented examples show why family context matters
IAUCN08S5L160TATMA1Automotive MOSFET
The official product page maps this OPN to Salesname IAUCN08S5L160T, automotive qualification, PG-LHDSO-10 / SSO10T, 2,000-piece tape-and-reel packing, MSL 1, and non-dry moisture packing. The Salesname can be decoded with the current automotive MOSFET naming guide; ATMA1 remains the order-level suffix.
CYT2BL3CAAQ0AZEGSTRAVEO T2G MCU
Infineon's CYT2BL documentation maps device code CYT2BL3CAE to this complete ordering code for a 64-LQFP device with its specified memory and HSM configuration. Its ordering-code table defines package, revision, fab, temperature, and automotive quality fields. Those positions belong to this TRAVEO family—not to a MOSFET or regulator.
SAK-TC397XP-256F300S BDAURIX MCU Salesname
Infineon's naming note explains fields for automotive temperature range, AURIX generation, series, package size, core architecture, feature package, memory, frequency, and package type. The trailing design step such as BD is operationally important and should be checked against the matching addendum and errata—not dropped as punctuation.
TLS850B0TEV50ATMA1OPTIREG linear regulator
The product page identifies Salesname TLS850B0TE V50, 5.0 V output, PG-TO252-5, automotive qualification, and active/preferred status. It lists 2,500-piece tape-and-reel packing, MSL 1, RoHS compliance and halogen-free status while reporting lead-free as “No”—proof that environmental attributes must remain separate fields.
These examples are documentation walkthroughs, not claims that the four products share one syntax or are suitable substitutes. Specifications, status, planned availability, and documentation can change; recheck the exact model at the time of RFQ and approval.
Documented case study: one Salesname, three OPNs, different design steps
Official datasheet case · not a YURUNOX customer anecdote
TLE9879QXA40 shows why a suffix cannot be treated as disposable text
Infineon's September 2025 TLE9879QXA40 datasheet lists three orderable configurations under the same product type: TLE9879QXA40XUMA2 for BF step in VQFN-48-31, TLE9879QXA40XUMA3 for UH step in VQFN-48-37 / VQFN-48-79, and TLE9879QXA40XUMA4 for UI step in those later package variants.
| OPN | Design step | Documented package | Approval consequence |
|---|---|---|---|
TLE9879QXA40XUMA2 | BF | VQFN-48-31 | Keep the BF-step datasheet/errata and package evidence with the approved record |
TLE9879QXA40XUMA3 | UH | VQFN-48-37, VQFN-48-79 | Do not merge into XUMA2 inventory; review step, package, errata, and software impact |
TLE9879QXA40XUMA4 | UI | VQFN-48-37, VQFN-48-79 | Approve as its own OPN and verify the intended package variant and current revision evidence |
The datasheet is the controlling evidence for this case. It does not justify a rule that every A1/A2/A3/A4 transition changes silicon or package. Infineon has also documented examples where an A1-to-A2 increment has no technical difference. The safe rule is narrower: preserve the complete OPN, then investigate the exact reason for that model.
Source: Infineon TLE9879QXA40 datasheet, Rev. 2.2.
Package name, drawing, and top mark require separate checks
A shared “VQFN-48” description does not remove the need to verify the exact Infineon PG drawing, body and terminal dimensions, pitch, exposed pad, thermal path, MSL, marking, and land-pattern guidance. A distributor description is not the mechanical authority.
For a proposed alternate, engineering should compare package drawings and pinouts; quality should compare qualification and change notices; manufacturing should compare paste, reflow, inspection, dry-pack, and floor-life controls.
Identifier triage tool: choose the right evidence path
This tool does not invent a decoded OPN. It identifies the minimum documents to collect before a quote, substitution review, or receiving decision.
Start with the family nomenclature and exact product page
- Preserve the complete string and search the official Infineon site.
- Open the matching family datasheet or naming table.
- Do not release a purchase with the Salesname alone; request the OPN and SP mapping.
The output is a document checklist, not a component approval or authenticity result.
Turn the decoded identity into a purchasing and receiving control
A technically correct decoder still fails if the quote, BOM, ERP record, and incoming plan use different identifier levels. YURUNOX is an independent electronic-component sourcing partner; it does not manufacture Infineon products or define Infineon's nomenclature. The buyer's practical goal is an evidence-backed match to the approved manufacturer configuration.
Illustrative procurement scenario
A quote contains only CYT2BL3CAE
The device code is useful for locating the TRAVEO family, but it does not preserve the full ordering-code fields. Ask the supplier to quote the complete approved code—such as the documented CYT2BL3CAAQ0AZEGS example—plus manufacturer, quantity, packaging, date/lot requirements, traceability, and current product evidence. This scenario illustrates the control decision; it is not a reported shipment or customer result.
Illustrative receiving scenario
The reel label matches the OPN, but the top mark is much shorter
Do not reject or accept on that one observation. Scan the label's barcode/data-matrix fields, confirm the OPN and SP mapping, compare the device mark with the official marking table, and reconcile lot/date/site data with the chain-of-custody documents. Quarantine unexplained differences. This is an illustrative workflow, not a YURUNOX inspection claim.
RFQ fields that prevent avoidable clarification loops
- Exact identity.Manufacturer name, full Salesname, complete OPN, SP number if known, and customer part number mapping.
- Electrical and software configuration.Required silicon/design step, memory/security/programming option, datasheet revision, errata baseline, and prohibited variants.
- Mechanical configuration.Infineon PG package, package drawing revision, pin count, footprint constraints, and allowed marking.
- Grade and qualification.Automotive qualification, temperature and quality grade, production status, and any functional-safety/cybersecurity document needs.
- Packing and handling.Tape/reel, tray, tube or other format; standard pack quantity; MSL; dry/non-dry condition; remaining floor-life policy.
- Compliance.RoHS, halogen, totally lead-free status, material declaration, exemption requirements, and declaration date.
- Traceability and lifecycle.Lot/date-code rules, label/barcode fields, factory/site evidence, PCN/PD requirements, authorized alternative rules, and delivery location.
MCUs need memory, core, security, step, errata, software, boot, package, and temperature review. MOSFETs need polarity, VDS, RDS(on) at the stated gate voltage, threshold class, thermal/avalanche data, cooling direction, package, and qualification review. Regulators and motor-control ICs need voltage/current, features, diagnostics, interfaces, drivers, package, step, and temperature review.
For broader evidence expectations, see YURUNOX's quality-assurance approach and the Infineon sourcing page.
Frequently asked questions
What is the difference between an Infineon Salesname and OPN?
The Salesname is the readable, family-specific product name. The OPN uses an adapted Salesname plus five suffix characters for environmental and packing attributes and a variant designator. One Salesname can map to multiple SP numbers, so controlled purchasing should preserve the exact OPN and its SP mapping.
What do the last five characters of an Infineon OPN mean?
The first suffix character represents a combined RoHS, halogen, and totally lead-free status. The second represents packing type with moisture protection; the third represents packing-size class; the final two are a non-speaking product-variant designator. Use the current OPN translation table and exact product page.
What do A1, A2, A3, or A4 mean at the end?
They are designators, not a universal reel or revision code. Infineon increments the designator when a new SP number is created without changing the Salesname or first three OPN suffix identifiers. Some documented transitions have no technical difference; others distinguish design steps or other variants. Investigate the exact product documentation and notices.
Can I order an Infineon automotive component using only the Salesname?
A Salesname can help locate and select the product, but it may not define one unique SP-level order configuration. Request the complete approved OPN and SP mapping, then specify package, grade, packing, compliance, traceability, and any step restrictions in the purchase record.
Does an IAU, SAK, CYT, TLE, or TLS prefix prove automotive qualification?
No single prefix is a universal qualification certificate. These prefixes appear in different automotive families and naming histories, but the exact product page, datasheet validation statement, applicable AEC qualification, temperature/quality grade, and production status must control the decision.
Why can the package top mark be shorter than the OPN?
Package area is limited. The device may carry an abbreviated product code plus lot, date, site, or data-matrix information. Match it to the official marking table, packing label, barcode fields, complete OPN, SP number, and traceability record.
Does RoHS compliant mean totally lead-free?
Not necessarily. Infineon's OPN system treats RoHS, halogen-free, and totally lead-free status as separate attributes within the environmental combination. The TLS850B0TE V50 product page, for example, reports RoHS compliant and halogen free while reporting lead-free as “No.” Review the exact material declaration and applicable exemption.
Are two OPNs with the same base Salesname interchangeable?
Not automatically. They can differ in packing, environment, temperature, testing, customer configuration, ROM code, wafer or wire details, design step, package, or another SP-level distinction. Compare official product records, datasheets, package drawings, errata, PCNs/PDs, qualification, and software implications before approval.
Prepare a reviewable Infineon RFQ
Send the exact identifiers—not a shortened family name
Include the full Salesname, OPN, SP number if known, target quantity, approved step/package/grade, packing and moisture requirements, traceability rules, compliance evidence, delivery location, and whether alternatives are permitted.
- Full OPN and SP mapping
- Package and design step
- Automotive/temperature/quality grade
- Pack quantity, MSL, dry-pack condition
- Lot/date and chain-of-custody evidence
- Alternative-approval boundary
Technical sources and image licenses
- Infineon — Orderable Part Number (OPN): official OPN structure, adapted Salesname, suffix positions, SP-number relationship, designators, labels, and sample limitations.
- Infineon — IAUCN08S5L160T product page and datasheet: exact OPN, package, packing, MSL, environmental, and device evidence.
- Infineon — CYT2BL TRAVEO T2G documentation: device-code and ordering-code nomenclature and exact ordering rows.
- Infineon Developer Community — AURIX MCU naming scheme and TC39x variant addendum.
- Infineon — TLS850B0TE V50 product page: exact OPN, output, package, automotive qualification, packing, MSL, and environmental attributes.
- Infineon — TLE9879QXA40 datasheet: documented XUMA2/XUMA3/XUMA4 design-step and package mappings.
- Images: ColinMB, Rover MEMS 1.6 ECU, CC BY-SA 3.0; MichaelFrey, MFrey QFP100, CC BY-SA 2.0 DE; Moritz94, QFN sideview, CC BY-SA 3.0.
Sources reviewed 28 August 2026. Recheck current product status, documentation revisions, OPN translations, PCNs/PDs, qualification, package drawings, material declarations, and official order mapping before purchase or substitution.