Distribution


The ultimate guide to making the most of component obsolescence


Paul Bentley, managing director of GD Rectifiers, discusses the benefits of using authorised sources and specialist distributors in today’s fast-paced power electronics industry


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omponent obsolescence is one of the most significant challenges facing the power electronics industry today. As technologies evolve faster than


ever, manufacturers discontinue legacy semiconductors, passive components, and circuit protection devices at increasing rates. For OEMs operating in sectors such as rail, aerospace, industrial automation, renewable energy, defence, and medical electronics, unmanaged obsolescence can lead to costly redesigns, production delays, compliance risks, and supply chain disruption. However, component obsolescence does not have to be a reactive crisis. When approached strategically, it can become an opportunity to improve operational resilience, strengthen supplier relationships, reduce lifecycle costs, and support sustainability initiatives. Businesses that proactively manage obsolescence are better positioned to maintain product continuity, optimise procurement strategies, and future- proof their designs.


Understanding component obsolescence


Component obsolescence occurs when a manufacturer discontinues a part or announces an end-of-life (EOL) notice. In power electronics, this commonly affects devices such as IGBTs, thyristors, diodes, MOSFETs, capacitors, rectifiers, and thermal management products.


Modern product lifecycles are becoming shorter as manufacturers release newer, higher-performing technologies. Industries with long operational lifespans, particularly rail and defence applications, are especially vulnerable because approval processes and redesign cycles can be lengthy and expensive.


The impact of obsolescence extends beyond engineering. Procurement teams may struggle to source genuine components, production schedules can be interrupted, and finance departments may face unexpected costs associated with redesigns or emergency purchases.


32 June 2026 1 Design for flexibility


Engineers should avoid designing systems around highly specialised or single-source components wherever possible. Designing with interchangeable footprints, modular architectures, and widely supported semiconductor technologies provides greater flexibility later in the product lifecycle.


2 Standardise components


 planning matters


The most successful manufacturers treat obsolescence management as an ongoing lifecycle strategy rather than an emergency response. Early planning provides businesses with time to evaluate alternatives, secure inventory, and redesign systems methodically. Proactive planning offers several key advantages: Reduced production downtime Lower redesign costs Improved forecasting accuracy Better supplier negotiations Stronger inventory management Enhanced customer confidence Reduced counterfeit risk Industry experts recommend performing regular component lifecycle audits to identify high-risk parts before they become unavailable.


A proactive strategy should include: 1 Lifecycle monitoring


Monitoring manufacturer product change notices (PCNs) and end-of-life notifications helps businesses identify potential issues early. Working closely with authorised distributors enables companies to receive advance warnings about discontinued products and available alternatives.


2 Risk classification


Not all components carry the same risk. Critical components with limited sourcing options or application-specific approvals should be prioritised. Businesses should


Components in Electronics


categorise components according to: Availability Supplier dependency Lead times Regulatory requirements Replacement complexity


3 Strategic stocking


For high-risk or long-life applications, strategic buffer stock programmes can protect production continuity. Maintaining controlled inventory levels allows manufacturers to bridge the gap between obsolescence announcements and redesign implementation.


4 Approved alternative components Developing approved alternative component lists minimises disruption when original parts become unavailable. This process should involve engineering, procurement, and quality assurance teams to ensure performance compatibility and compliance.


5 Supplier collaboration Long-term relationships with trusted suppliers and distributors are critical. Reliable supply partners often have direct communication with manufacturers and can recommend modern alternatives or sourcing solutions quickly.


 managing obsolescence


Effective obsolescence management requires a combination of engineering foresight and supply chain intelligence. Several technical best practices can significantly reduce future risk.


Reducing the number of unique components used across product lines simplifies inventory management and reduces sourcing complexity. Standardisation also improves purchasing leverage and lowers qualification costs.


3 Maintain detailed documentation Accurate bills of materials (BOMs), revision histories, and design documentation enable engineers to identify suitable replacements more efficiently when parts become obsolete.


4 Use authorised distribution channels Counterfeit semiconductors remain a major concern within global electronics supply chains. Procuring components through authorised distributors reduces the risk of counterfeit or substandard parts entering critical applications.


5 Build lifecycle assessments into new product development


Embedding lifecycle assessments into the design stage allows businesses to avoid components already nearing obsolescence or marked “not recommended for new design” (NRND).


 Although often viewed as a procurement or engineering challenge, effective obsolescence management delivers benefits across multiple business functions.  Procurement benefits - Procurement teams gain stronger forecasting visibility, reduced emergency sourcing costs, and improved supplier relationships. Advance planning also reduces dependency on volatile spot-market purchasing.


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