Infineon IGBT Module Buying Checklist
Choose the exact module from the converter mission profile—not from voltage and current printed in a distributor table.
Short answer: release an Infineon IGBT module only when electrical stress, loss and lifetime calculations, gate-drive behavior, mechanical integration, and supply-chain evidence all point to the same exact orderable part number.
A catalog match is only the first filter
Electrical fit
Topology, measured turn-off peak, operating current, losses, diode behavior and fault energy all stay within the exact datasheet conditions.
Thermal & life
Losses are mapped through the real cooling stack and mission-profile cycles, not a single idealized junction-temperature calculation.
Physical fit
Housing, pins, busbar, driver, isolation, TIM, heat sink and assembly instructions match the production process.
Supply evidence
The complete OPN, status, packing, traceability, PCN path and supplier authorization are documented before the purchase order.
Freeze the mission profile before searching part numbers
A useful buying specification describes what the converter does over time. Give engineering and sourcing the same input sheet: DC-link minimum, nominal and maximum voltage; phase current RMS, average and peak; overload magnitude and duration; switching frequency, modulation and dead time; coolant or ambient limits; altitude, humidity, vibration and contamination; start-stop cycles; expected service life; and fault-clearing strategy.
This prevents a common purchasing error: treating the datasheet’s maximum current as continuous usable current. The quoted current is tied to stated case or junction temperature and test assumptions. Your usable current is the outcome of conduction loss, switching loss, diode loss, cooling, overload repetition and lifetime target.
| Mission-profile field | Record this | Why purchasing needs it |
|---|---|---|
| Voltage | VDC,min/nom/max, turn-off peak, overshoot and abnormal transients | Determines blocking-voltage headroom from real stress—not a universal percentage. |
| Current | RMS, average, peak, overload, duration and repetition | Separates nominal operating need from short-time capability. |
| Switching | fsw, modulation, dead time, power factor, RG, VGE and stray inductance | Makes Eon/Eoff comparisons meaningful. |
| Cooling | Coolant inlet, flow, heat-sink Rth, flatness, roughness and TIM | Defines the real junction-to-coolant path and assembly controls. |
| Environment | Altitude, humidity, pollution degree, vibration and qualification class | Changes insulation, derating and qualification requirements. |
| Life & faults | ΔTj cycles, dwell times, service hours, short-circuit and protection timing | Connects the part to lifetime and protection evidence. |
What must be true before an Infineon IGBT module is approved?
| Gate | Questions to answer | Minimum evidence | Stop condition |
|---|---|---|---|
| Electrical | Correct topology? Safe VCE peak? Acceptable conduction, switching and diode losses? Fault behavior compatible? | Exact datasheet revision, normalized comparison, simulation and double-pulse/system waveform | Unmeasured overshoot or comparison at different test conditions |
| Thermal & lifetime | Does every chip stay within Tvj limits through steady and transient duty? Does the cycle spectrum meet life? | Loss model, Zth model, cooling data, mission profile and lifetime assumptions | Only a nameplate current or steady-state Rth calculation |
| Driver & layout | Are VGE, RG, power, isolation, DESAT, soft turn-off and Miller control suitable? | Driver schematic, gate-loop layout, fault timing and worst-case switching test | Gate driver selected only by output-current headline |
| Mechanical & insulation | Do envelope, terminals, PCB/busbar, heat sink, torque, TIM, clearance and creepage match? | Drawing, package-specific mounting instruction, assembly WI and insulation review | “Same housing family” used as proof of drop-in fit |
| Quality & supply | Is the complete OPN current? Is the source authorized? Are packing, traceability, PCN and storage controlled? | Manufacturer record, supplier authorization, CoC/labels, packing data and notification path | Suffix omitted, status assumed, or authenticity inferred from a label alone |
Voltage and current are calculations, not shopping filters
Choose voltage class from the turn-off waveform
Start with the maximum DC link, then add layout-driven overshoot and other credible transients. A first screening relationship is:
There is no universal “safe margin” that replaces the waveform. Gate resistance, busbar inductance, temperature, current and protection response can move the peak.
Size current from loss and temperature
Conduction loss follows the device’s nonlinear VCE(sat) curve and the actual current waveform. A quick switching-loss estimate is:
Include diode VF and recovery energy, dead-time conduction, overloads and parallel-current imbalance where relevant. Infineon’s IPOSIM can support product comparison, loss and thermal studies for supported parts; its result is still only as credible as the inputs.
Two real modules show why the complete part matters
These are documented comparisons, not YURUNOX field-test claims. Product status is time-sensitive and was checked on Infineon’s pages on 28 August 2026.
FF900R12ME7_B11
Infineon’s final datasheet identifies a 1200 V, 900 A EconoDUAL 3 half-bridge with TRENCHSTOP IGBT7, emitter-controlled 7 diode, NTC, isolated baseplate, PressFIT control contacts and screw power terminals.
- Why it matters
- The _B11 variant carries a physical-interface meaning. Dropping it from an RFQ can change how the control connection is assembled.
- Use-condition clue
- The datasheet lists industrial applications such as motor drives, servo drives, UPS and high-power converters. That is not evidence of automotive qualification.
- Release evidence
- Confirm exact OPN/packing, the package drawing, switching conditions, PQR where required, and the correct mounting instruction.
FF1800R17IP5
Infineon lists this as an active-and-preferred 1700 V, 1800 A half-bridge in PrimePACK 3+, using IGBT5-P5 and an integrated NTC. The orderable number shown is FF1800R17IP5BPSA1.
- Why it matters
- Its 1800 A headline does not make it a “larger replacement” for an EconoDUAL part. The housing is 89 × 250 mm, the assembly and busbar are different, and switching energy is specified at defined driver conditions.
- Use-condition clue
- Applications include traction, power transmission, wind, central inverters and motor control; the listed qualification is industrial.
- Release evidence
- Normalize losses to the application, validate the PrimePACK assembly, and preserve the BPSA1 orderable number in approved-vendor records.
Model the complete path from chip to coolant
A steady-state screening calculation can expose an obviously undersized cooling system:
Do not mix Foster and Cauer networks casually, apply a steady-state resistance to a short pulse, or treat the module NTC as instant junction temperature. The NTC is physically separated from the semiconductor junctions and responds differently.
- Define coolant inlet temperature and flow at the worst operating point.
- Use the specified baseplate/TIM construction and heat-sink boundary.
- Check average Tj, peak Tj, ΔTj and repeated overloads.
- Convert the load profile into thermal cycles for lifetime estimation.
- State model technology, failure criterion and extrapolation limits.
A “20-year lifetime” cannot be released from one steady-temperature point. Power cycling stresses bond wires, chip attach, substrate layers and interfaces; slower ambient or coolant swings add case-temperature cycling.
The module, gate driver, busbar and heat sink are one design
Do not transfer a screw torque, paste thickness or mounting sequence from another housing. Infineon’s AN2006-08, for example, is specific to Easy-family modules. EconoDUAL, PrimePACK and 62 mm packages require their own current documents.
Isolation test voltage is also not a complete end-product insulation design. The surrounding PCB, busbar, heat sink and gate-drive barrier determine the final clearance, creepage and reinforced/basic insulation result. Request the qualification report for the exact product where applicable; “industrial,” “traction” and “automotive” are not interchangeable labels.
Evidence gate builder
Select the application and purchasing stage. This tool returns the documents to collect; it does not approve a design.
Control the orderable part number—not a shortened description
Store the engineering type, full OPN, packing size/type, status on the approval date, datasheet and model revisions, qualification evidence, allowed manufacturing constraints, label format, date/lot rules, shelf/storage requirements, and PCN/PD contacts.
Infineon says major changes affecting form, fit, function, quality or reliability are communicated through its PCN process. The practical failure is often downstream: a notice reaches purchasing but not the engineer who owns the qualification. Assign an owner and record every affected approved part.
For counterfeit mitigation, Infineon strongly recommends buying direct or through an authorized distributor. Its anti-counterfeit guidance warns that gray-market products may be counterfeit or unreliable and requests source details, labels, packaging, part photos, invoice and shipping papers when a suspect product is reported.
The “same base part” trap
A buyer receives a quote for a shortened FF900R12ME7 description while the BOM requires the PressFIT FF900R12ME7_B11 variant. Electrical headlines look familiar, so price appears comparable.
Correct action: pause the quote, request the complete OPN and label/packing evidence, and verify the control-terminal technology against the released assembly drawing.
Consequence avoided: a module that cannot enter the approved PCB/assembly process.
The clean-label trap
An open-market lot has visually convincing labels but incomplete source history and traces of previous mounting compound on several baseplates.
Correct action: quarantine the lot, preserve photos and records, escalate through the quality plan, and do not call the parts authentic from marking inspection alone.
Consequence avoided: used or mishandled modules entering production as new stock.
Send this evidence with the request for quotation
| RFQ block | Required information | Supplier response to request |
|---|---|---|
| Identity | Exact preferred OPN and allowed alternate OPN; no shortened family names | Quoted full OPN, manufacturer status, packing and label sample |
| Electrical duty | Topology, VDC, phase current, switching, overload and fault profile | Exact datasheet revision and any unresolved application constraints |
| Cooling & life | Coolant/ambient, heat sink, TIM, duty cycles and lifetime target | Available thermal models, lifetime support and mounting documents |
| Integration | Package, terminals, PCB/busbar, mounting, gate drive, protection and isolation | Mechanical drawing, recommended driver references and package notices |
| Quality | Industrial/traction/automotive requirement, compliance and qualification | Exact-part qualification report or a written statement of availability |
| Commercial | Quantity, forecast, delivery horizon, date-code policy and last-time-buy exposure | MOQ/SPQ, lead time, stock location, allocation terms and NCNR terms |
| Traceability | Required CoC, packing labels, lot/date codes, source chain and PCN routing | Evidence package before shipment and deviation-notification process |
Infineon IGBT module buying questions
Can I select an IGBT module from its current rating?
No. The datasheet current is defined at stated thermal and electrical conditions. Select from the application current waveform, conduction and switching losses, diode behavior, cooling path, overload repetition and lifetime target.
Which IGBT voltage class fits a 600 V or 800 V DC link?
There is no safe universal mapping. Calculate or simulate maximum turn-off voltage from VDC maximum, stray inductance, di/dt and other transients, then verify it with worst-case measurement and the exact protection strategy.
Can I compare two modules by VCE(sat) alone?
No. VCE(sat) addresses conduction behavior at defined current, gate voltage and temperature. A valid comparison also normalizes switching energy, diode loss, thermal impedance, gate-drive conditions and the application’s current distribution.
Is the module NTC the junction-temperature sensor?
No. It measures temperature at its physical position inside the module and has a different transient response from the IGBT and diode junctions. Use the manufacturer’s thermal model and validated estimation method.
Does pre-applied TIM always make one variant better?
No. TIM can improve process repeatability, but the correct choice depends on the exact module variant, heat-sink surface, pressure, assembly instructions, service process and validated thermal result.
Can an IGBT4 module be replaced by an IGBT7 module in the same housing?
Not automatically. Recheck switching behavior, gate resistance and drive, diode recovery, short-circuit response, loss balance, terminals, package revision, thermal behavior and lifetime. “Same housing” is not a drop-in approval.
What documents should arrive with an IGBT module purchase?
At minimum, request the exact OPN, packing and label evidence, lot/date traceability, invoice and shipping records, supplier authorization status and required certificate of conformance. Add qualification and PCN evidence according to the program.
Can visual inspection prove an Infineon module is authentic?
No. Visual inspection can identify inconsistencies or previous use, but convincing markings do not prove source or hidden condition. Prefer direct or authorized distribution and treat open-market purchases as controlled exceptions.
Documents used for this checklist
- Infineon FF900R12ME7 product page and FF900R12ME7_B11 final datasheet, revision 1.20.
- Infineon FF1800R17IP5 product page and current datasheet.
- AN2011-05: Industrial IGBT Modules—Explanation of Technical Information.
- AN2015-10: Transient Thermal Measurements and Thermal Equivalent Circuit Models.
- AN2006-08: Mounting Instructions for EasyPIM and EasyPACK Modules.
- Infineon product change notification and discontinuation process.
- Infineon counterfeit-products guidance and authorized distribution directory.
Technical status and linked documents were checked on 28 August 2026. Manufacturer data, status and revisions can change; re-check the official record at each design release and purchase.
Need the exact Infineon module—not just a close catalog match?
Send the preferred OPN, approved alternates, mission-profile summary, quantity, required date, packing and traceability expectations. We will help organize the sourcing evidence for your engineering and quality review.
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