How to Source Power Semiconductors During Global Shortages: A Procurement Playbook for SiC, IGBT and Power Discretes

Published: June 13, 2026 | Category: Energy

Power-semiconductor shortages can stop an inverter, charger, energy-storage system, industrial drive, or power-conversion platform even when the rest of the BOM is fully available. Silicon carbide MOSFETs, IGBT modules, high-voltage MOSFETs, diodes, gate drivers, and integrated power modules often sit on the critical path because they are tied closely to switching frequency, thermal design, protection, PCB layout, and system qualification.

When lead times rise sharply, procurement teams face a difficult choice: wait for the approved device, buy expensive spot-market inventory, qualify an alternate supplier, move to a module-based solution, or redesign the power stage. The right decision depends on how quickly production must recover, how much engineering change is acceptable, and how much sourcing risk the program can tolerate.

This guide provides a practical sourcing framework for power semiconductors during allocation and shortage periods. It focuses on the procurement pain points that matter most: supplier concentration, alternate qualification, counterfeit risk, module substitution, Chinese domestic alternatives, GaN migration, independent sourcing, and the documentation needed to protect production.

Why Power-Semiconductor Shortages Are Harder Than Ordinary Component Shortages

Power semiconductors are not usually interchangeable in the same way as commodity passives. A nominally similar 1200V SiC MOSFET can differ materially in RDS(on), switching energy, gate charge, output capacitance, package inductance, thermal resistance, recommended gate voltage, short-circuit behavior, and qualification grade.

That means a substitution can affect:

• Gate-driver design

• Switching frequency

• Dead time

• EMI performance

• Heat-sink sizing

• Snubber networks

• Current sensing

• Protection thresholds

• PCB layout

• Efficiency and thermal margin

For IGBT modules, mechanical footprint and bus-bar arrangement can make replacement even harder. A device from another manufacturer may have similar voltage and current ratings but require different mounting hardware, terminal geometry, cooling interfaces, or driver behavior.

Procurement therefore needs a structured response rather than a simple “find equivalent” instruction.

Start by Classifying the Shortage

Before looking for alternates, determine what type of supply problem you are dealing with.

Temporary Allocation

The part is active, demand has exceeded supply, and the manufacturer expects production to normalize. In this case, bridge inventory and alternate channels may be more economical than redesign.

Structural Capacity Constraint

The device family is active, but wafer, die, package, or module capacity remains tight for an extended period. This often affects rapidly growing technologies such as SiC.

Lifecycle Risk

The part is mature, NRND, or approaching EOL. A shortage may be the first visible sign that long-term supply is deteriorating. In this case, the program should treat the issue as an obsolescence problem rather than only a lead-time problem.

Single-Source Design Risk

The semiconductor is available in the market, but the approved BOM contains only one manufacturer and one package. This is a design-level sourcing problem and should trigger alternate qualification.

Path 1: Qualify Chinese Domestic SiC Alternatives

China has developed a growing domestic silicon-carbide ecosystem, including substrate, wafer, device, and module suppliers. For suitable commercial and industrial applications, domestic SiC MOSFETs can provide a useful second-source path when established global brands are constrained.

The procurement opportunity is clear: additional supplier capacity can reduce lead-time exposure and create leverage in high-volume programs. But buyers should avoid treating domestic alternatives as automatic drop-in replacements.

Engineering should compare:

• Voltage rating

• RDS(on) at operating temperature

• Switching energy

• Gate charge

• Output capacitance

• Reverse conduction characteristics

• Short-circuit withstand capability

• Package construction

• Thermal resistance

• Qualification data

For export-oriented products, procurement should also confirm end-market certification, customer approval, and any contractual restrictions before making the substitution.

Path 2: Move from Discrete Devices to Power Modules

If a discrete SiC or IGBT device is unavailable, a module-based solution can sometimes reduce component-level sourcing risk. Power modules may integrate multiple dies, internal interconnects, thermal interfaces, and sometimes sensing or protection functions into one qualified assembly.

Suppliers such as Semikron Danfoss, Fuji Electric, Vincotech, Infineon, onsemi, ROHM, and others provide module solutions for solar, storage, industrial drive, and high-power conversion systems.

The benefit is consolidation. Instead of sourcing multiple discrete switches, drivers, thermal interfaces, and bus connections separately, the program may qualify one integrated power module.

The trade-off is that modules can be expensive and mechanically specific. Procurement should verify:

• Module footprint

• Electrical topology

• Voltage and current rating

• Thermal interface

• Cooling method

• Gate-drive requirements

• Terminal layout

• Availability of compatible second sources

A module substitution is often easier during NPI than after mass production because mechanical redesign can be substantial.

Path 3: Consider GaN for Lower-Voltage and Lower-Power Stages

GaN can be a viable alternative to silicon or SiC in selected applications, particularly where switching frequency and power density matter more than very high voltage capability.

650V-class GaN devices are commonly considered for applications such as:

• High-frequency DC-DC conversion

• Onboard chargers

• Server and telecom power supplies

• Compact industrial power converters

• Power-factor-correction stages

For lower-power stages, GaN can deliver very fast switching and low switching loss. However, it is not a drop-in replacement for SiC. Gate-drive voltage, package layout, protection, dead-time behavior, and PCB parasitics must be reviewed carefully.

Procurement should therefore treat GaN as a redesign path rather than a simple sourcing substitute.

Path 4: Use Vetted Independent Channels as a Bridge

When authorized distribution cannot meet the production schedule, qualified independent distributors can provide bridge inventory. This is often the fastest path when the design cannot be changed and the shortage is temporary.

However, power semiconductors can carry significant counterfeit and quality risk in the secondary market. High-value SiC MOSFETs, IGBT modules, MOSFETs, and rectifiers may be remarked, resurfaced, relabeled, recovered from assemblies, or mixed across lots.

A reputable independent sourcing process should include documentation and inspection requirements before the purchase order is released.

Recommended Controls

• Supplier qualification

• Original packaging photographs

• Date-code and lot-code disclosure

• Traceability documentation where available

• Visual inspection

• X-ray inspection for high-risk packages

• XRF or material analysis where appropriate

• Electrical parameter spot-checking

• Functional testing for critical devices

The deeper the supply chain moves away from the original manufacturer, the stronger the incoming controls should become.

Do Not Judge an Offer by Lead Time Alone

During a shortage, a two-week offer can look much more attractive than a 20-week factory schedule. But unusually short lead time should trigger verification, not automatic approval.

Procurement should ask:

• Is the material physically in stock?

• Who owns the stock today?

• Can photographs be provided?

• Are date codes known?

• Is the inventory one lot or mixed?

• Is original packaging available?

• Can the seller support third-party inspection?

A supplier that cannot answer these questions may be quoting speculative inventory rather than real stock.

Price Red Flags

Power-semiconductor spot pricing can vary significantly during allocation. A low price is not automatically suspicious, but a quote far below the rest of the market should be investigated.

Possible explanations include:

• OEM excess inventory

• Older date codes

• Mixed lots

• Repackaged material

• Incomplete traceability

• Non-approved product grade

The correct procurement question is not “Why is this cheap?” but “What explains the price difference, and does that explanation create unacceptable quality risk?”

Cross-Reference at the System Level

When engineering evaluates a substitute, it should not compare only the power transistor. The complete power stage needs to be reviewed.

For SiC substitutions, compare:

• Gate-driver voltage

• Peak source/sink current

• CMTI

• Miller clamp

• Desaturation or short-circuit protection

• Gate resistance

• Turn-on and turn-off timing

• Thermal design

• Snubber network

For IGBT modules, also compare module baseplate, mounting torque, terminal spacing, cooling plate, and bus-bar geometry.

This prevents a common mistake: approving a semiconductor alternate that later forces unplanned changes elsewhere in the BOM.

Build a Shortage Response Matrix

How Much Buffer Inventory Should You Hold?

There is no universal answer. Buffer stock should be based on the expected duration of the supply gap, forecast stability, redesign lead time, annual usage, working capital, storage risk, and product lifecycle.

A practical calculation may include:

• Confirmed production demand

• Expected demand during the supplier recovery window

• Service inventory

• Yield loss

• Engineering qualification time

• Forecast uncertainty

For expensive power modules, overbuying can tie up substantial cash. For low-cost but line-stop-critical discretes, a larger buffer may be easier to justify.

Lead-Time Claims Should Be Verified Continuously

Lead times for SiC, IGBT, and GaN devices are not static. They vary by voltage class, die size, package, qualification grade, and manufacturer capacity. Procurement should avoid using a generic market statement such as “all 1200V SiC is 30 weeks” as a permanent planning assumption.

Instead, track the exact MPN through:

• Manufacturer information

• Authorized distributors

• Qualified independent channels

• EMS inventory

• OEM excess channels

This gives a more accurate view of real availability and helps distinguish a local distributor shortage from a global device shortage.

What to Include in a Power-Semiconductor RFQ

A strong RFQ should make the sourcing constraint explicit.

• Full manufacturer part number

• Required quantity

• Annual forecast

• Target delivery date

• Acceptable date-code range

• Required package

• Voltage and current class

• Qualification grade

• Whether alternates may be proposed

• Whether partial deliveries are acceptable

• Traceability requirement

• Inspection requirement

If the customer is open to alternatives, include the switching frequency, bus voltage, gate-driver architecture, and thermal constraints. That gives the sourcing partner enough information to propose realistic engineering candidates rather than superficial cross-references.

Common Procurement Mistakes During Power-Semiconductor Allocation

Mistake 1: Waiting until inventory reaches zero. Alternate qualification takes time. Start when lead time begins to expand.

Mistake 2: Approving substitutes from voltage and current ratings alone. Dynamic switching behavior matters.

Mistake 3: Buying from unknown brokers without inspection. Short lead time is not a substitute for traceability.

Mistake 4: Ignoring gate-driver compatibility. SiC, IGBT, and GaN may require different drive conditions.

Mistake 5: Treating a temporary shortage like an EOL event. Sometimes bridge inventory is cheaper than redesign.

Mistake 6: Treating an EOL problem like a temporary shortage. If lifecycle status is deteriorating, redesign planning should begin immediately.

A Better Long-Term Strategy: Dual-Source the Power Stage Early

The strongest way to reduce future shortages is to design for sourcing flexibility before production starts.

During NPI, engineering and procurement can:

• Evaluate two semiconductor manufacturers

• Use compatible packages where practical

• Design gate drivers with adjustable turn-on and turn-off behavior

• Preserve thermal margin

• Approve alternate passive networks

• Qualify more than one module supplier

• Maintain current lifecycle data

This does not eliminate supply risk, but it reduces the cost and time required to respond when the next allocation cycle begins.

How Aurora Components Supports Power-Semiconductor Shortage Sourcing

Aurora Components Co., Limited supports OEMs, EMS providers, engineering teams, and procurement departments sourcing electronic components for solar inverters, energy-storage systems, EV charging, industrial power, telecom, and other high-power applications.

Power-semiconductor shortages often involve more than one constrained line item. A SiC MOSFET issue may be accompanied by gate-driver, current-sensor, capacitor, inductor, connector, or module shortages. Reviewing the complete power BOM can uncover additional supply risks before they become production stops.

Aurora Components can assist with hard-to-find power semiconductors, BOM sourcing, shortage requirements, obsolete and EOL parts, multi-manufacturer searches, alternate sourcing, and qualified independent-channel supply. Customers should define traceability, packaging, inspection, date-code, qualification, and documentation requirements before order placement.

If your approved SiC MOSFET, IGBT module, power MOSFET, diode, or gate driver is constrained, send the exact part number and required quantity. For larger redesign or second-source projects, submit the complete power BOM for sourcing review.

Sourcing power semiconductors during allocation? Submit your BOM / RFQ to Aurora Components.

Website: www.auroraic.com
Email: info@auroraic.com