Obsolescence management for electronic components: a practical guide

By Mark Tomasi, Managing Director · Last updated 29 September 2026

What is obsolescence management?

Obsolescence occurs when a component, material or piece of software you depend on is no longer available from its original manufacturer. Obsolescence management is the structured process of identifying that risk early, assessing its impact and choosing the most cost-effective response — ideally before a production line or a service contract is affected.

In electronics, the problem is a mismatch of lifecycles. Industrial controllers, medical devices and rail systems are built and serviced for 15–30 years, while many of the semiconductors inside them are commercially available for only a fraction of that time. Industry estimates put the number of end-of-life notices issued each year at around half a million.

Why components go end-of-life

• Falling demand: the part is no longer profitable to produce.
• Technology shifts: newer process nodes, packages and memory generations replace older ones.
• Fab and line closures, often following mergers and acquisitions.
• Portfolio clean-ups, where overlapping part families are consolidated after an acquisition.
• Regulation: substance restrictions under RoHS and REACH can force material changes and retire variants.

Discontinuation is not the only risk. A product change notification for a new die revision, assembly site or material can be just as disruptive in qualified applications such as medical, rail or aerospace, because it may trigger requalification.

Reactive, proactive and strategic obsolescence management

• Reactive: you act when a discontinuation notice arrives or a part can no longer be bought. Cheapest to run — most expensive when it goes wrong.
• Proactive: you monitor your BOMs continuously, rank parts by risk and prepare a response before the notice arrives.
• Strategic: you design for obsolescence — choosing parts early in their lifecycle, qualifying second sources and keeping designs modular so a single part can be replaced.

Most small and mid-sized manufacturers work reactively. Moving just the most critical parts of each BOM to proactive monitoring removes much of the risk at a fraction of the effort.

Your options when a component goes obsolete

In practice, open-market sourcing is what covers the gaps: a missed order window, a forecast that turned out too low, or a repair order years after production ended.

How to monitor obsolescence risk

• Register for change and discontinuation notices from manufacturers and distributors for every part on your BOMs — and make sure they reach a named person, not a shared inbox nobody reads.
• Use lifecycle data. Distributor sites and commercial databases show the status of each manufacturer part number: active, NRND, end-of-life or obsolete.
• Review BOMs on a fixed schedule — at least once a year, and always before a new production batch or a long service contract.
• Watch for early signals: NRND status (not recommended for new designs), shrinking distributor stock and lengthening lead times.

A discontinuation notice normally sets two dates: the last time buy date (the last day to order) and the last time ship date. The JEDEC standard for product discontinuance (JESD48, today J-STD-048) has long required at least six months from notice to final orders and twelve months to final shipments, and many manufacturers still work to that. Policies vary between manufacturers, so always read the dates in the notice itself.

Building an obsolescence management process

1. List your products and their BOMs with full manufacturer part numbers — not internal codes.
2. Rank parts by criticality: single-source parts, parts with long qualification, safety-relevant parts and high-usage parts first.
3. Set up monitoring for the critical parts as described above.
4. Agree decision rules in advance: who chooses between last time buy, alternative and redesign — and up to which budget.
5. Assign an owner. Obsolescence falls between purchasing, engineering and quality unless someone is responsible for it.
6. Record every decision, so the next product generation benefits from it.

To go further, the Component Obsolescence Group Deutschland (COGD) — a non-profit association founded in 2005 — brings manufacturers, EMS providers and service companies together on methods and standards.

When open-market sourcing is the right call — and how to manage the risk

Once a part has left authorised distribution, the open market — brokers, independent distributors and OEM excess stock — is often the only remaining source. It is the right choice when the order window has passed, when remaining demand is too small to justify a redesign, or when you need parts for repairs long after production has ended.

The risk is counterfeit and substandard parts: remarked, recycled or out-of-specification components that entered the supply chain through less controlled channels. Manage it by buying from a supplier who inspects to a published standard and documents the result.

We source EOL and hard-to-find parts across microcontrollers, analog ICs, memory and power components through a vetted global supplier network. Send us a part number or your BOM and we'll come back with sourcing options within one business day.