Every year, tens of billions of passive components — capacitors, sensors, analog chips — flow through supply chains that no one can fully trace. And the people responsible for keeping power grids, defense systems, and telecom networks running are starting to panic.

The problem isn’t just counterfeits. It’s that the entire mechanism we use to establish trust in these components is fundamentally broken for anything analog or discrete.

Why Digital Chips Get All the Attention

Digital semiconductors have had Physically Unclonable Functions (PUFs), secure elements, and cryptographic ID technology for years. A modern processor can literally tell you who made it, which fab it came from, and whether it’s been tampered with in transit. That’s not science fiction — it’s standard supply chain security for anything with meaningful security requirements.

But go one layer down to the analog world — the capacitors filtering your power rails, the sensors feeding data to your BMS, the discrete components holding your system together — and you’re in the Wild West. No immutable ID. No cryptographic anchor. No way to know if that component came from an authorized channel or a gray market broker in Shenzhen.

The $150 Billion Problem Nobody Wants to Talk About

Critical infrastructure — telecom, aerospace, defense, utilities — represents roughly 20% of the global semiconductor TAM, or about $150 billion annually. These sectors are required to use components from trusted supply chains, but the tooling to actually enforce that? It’s mostly missing for anything that isn’t a high-value digital chip.

The result is a two-tier system where digital components have robust provenance tracking and everything else — including most passive components — just gets waved through on trust.

The Emerging Solution: Certificate-Based Trust Anchors

Companies like Aerocyonics and Tartan Silicon Systems are working on approaches that bind physical device identity to cryptographic certificates shared across the entire manufacturing ecosystem — wafer fab, packaging house, PCB assembly, end system.

The core idea: embed an immutable hardware root-of-trust at the die or component level. This could be a PUF derived from silicon variation, a laser-etched die ID linked to a fab database, or a secure element embedded during wafer processing. Once anchored, the component carries a verifiable digital identity that survives through the entire supply chain and into field deployment.

This is being extended to cover analog ICs, sensor ICs, and discrete components — the very categories that have historically had zero protection against counterfeiting or tampering.

Why This Matters for Passive Component Buyers

If you source capacitors, resistors, or inductors for any application in critical infrastructure, the question of provenance is no longer theoretical. Regulatory pressure is increasing. End-to-end tracking requirements are becoming more common in defense and aerospace supply chains. And the cost of a single counterfeit-related failure — in terms of liability, downtime, and reputation — can far exceed the cost of implementing proper tracking.

The era of “trust but don’t verify” for passive components is ending. The industry is moving toward systems where every component can prove its identity from fab to final assembly. Whether your supply chain is ready for that transition is a question worth asking today.

Source: Semiconductor Engineering, April 2026