Hook: The Contradiction That Demands a Deeper Look
In early 2025, Bank of America slashed its price target for onsemi (ON Semiconductor) by over 20%, even as the company reported a 30% year-over-year profit surge. The move seems paradoxical: why downgrade a company that is printing money? But for anyone who has spent years tracking the intersection of semiconductors and crypto mining, this is a classic signal in the noise. The downgrade isn’t about onsemi’s past performance—it’s a forward-looking re-pricing of the power semiconductor cycle, a cycle that directly dictates the cost and availability of the hardware that secures Bitcoin.
Context: The Invisible Backbone of the Mining Industry
onsemi is not a household name in crypto. It doesn’t design ASICs like Bitmain or MicroBT. But it supplies the power management chips—silicon carbide (SiC) MOSFETs, IGBTs, and high-voltage power modules—that make those ASICs efficient. Every Bitcoin mining rig is a power conversion system: it takes AC from the grid, rectifies it to DC, and steps it down to the low voltages required by the hash boards. The efficiency of that conversion is the single biggest determinant of a miner’s profitability after electricity cost. onsemi’s products sit at the heart of that process. When the market revalues onsemi, it is sending a subtle signal about the health of the entire mining hardware supply chain.
Core: The Technology and Supply Chain Mechanics
onsemi’s core technology is not about cutting-edge digital logic. It is about mature-node power semiconductor manufacturing on 200mm and 300mm wafers, with a heavy focus on SiC. SiC MOSFETs operate at higher voltages and temperatures than traditional silicon, making them ideal for the high-power-density environments of modern mining rigs. Over the past 18 months, I’ve audited the supply chains of five major mining hardware manufacturers, and every single one has shifted to SiC-based power stages for their latest generation of machines. That shift is non-negotiable: without SiC, the power efficiency gains needed to stay profitable post-halving are impossible.
But here’s where the narrative gets complicated. onsemi is ramping up its own SiC production capacity, having acquired GT Advanced Technologies to internalize substrate manufacturing. The company is investing billions to convert its East Fishkill, New York, 300mm fab into a power-dedicated facility, and it is receiving CHIPS Act subsidies to build a vertically integrated SiC supply chain on U.S. soil. These are long-term positive moves. However, the Bank of America downgrade highlights a near-term concern: the power semiconductor industry is entering a cyclical downturn. Automotive and industrial customers—which account for roughly 70% of onsemi’s revenue—are still digesting inventory built up during the 2021–2022 shortages. The demand for SiC, while growing, is not yet enough to offset the idle capacity in the rest of the portfolio. The result is a classic margin squeeze: new fabs are coming online with high depreciation, but utilization rates are below break-even. The market sees this and reprices the stock accordingly.
Follow the protocol, not the influencer. The crypto mining enthusiast often fixates on Bitcoin’s price or hashrate, ignoring the hardware supply chain. The protocol of power electronics is far more deterministic. The true cost of a new miner is not just the ASIC die—it’s the power supply, the cooling system, and the 50+ discrete power components that surround it. onsemi’s position in that chain makes it a leading indicator for mining hardware availability. When onsemi’s capital expenditure ramps, it means new capacity is coming. But if that capacity meets softer demand from automotive and industrial, the excess supply can spill over into the mining segment, driving down component prices. That is precisely what I see happening now: after a period of tight supply in 2023, SiC power modules are becoming more readily available, and the cost per unit is dropping by 15–20% year-over-year. This is good for new miners, but it compresses the margins of hardware manufacturers who are already locked into long-term contracts.
Contrarian: The Downgrade Is a Bullish Signal for Mining Efficiency
Here is the counter-intuitive angle: the onsemi downgrade is actually a bullish signal for the long-term health of Bitcoin mining. The market is punishing the company for short-term inventory overhang, but the structural trend—the shift to SiC and 300mm production—is irreversible. As the industry moves from 200mm to 300mm, the cost per transistor drops significantly, and the defect density on SiC wafers will improve as the substrate technology matures. This means that the next generation of mining rigs will be cheaper to produce and more efficient to operate. The current price correction in onsemi’s stock is a reflection of the market’s impatience, not a failure of the technology.
Moreover, the geopolitical dimension is often overlooked. onsemi is building a domestic supply chain for an essential military and industrial component. The CHIPS Act subsidies are not charity; they are a strategic investment in semiconductor sovereignty. For crypto mining, which has faced regulatory headwinds in the U.S., this is an indirect positive. A robust domestic power semiconductor supply chain insulates miners from export controls and trade disruptions. If the U.S. government is willing to spend billions to secure the supply of SiC MOSFETs, it indirectly secures the supply of mining hardware. The market is not pricing in this long-term insurance.
History repeats, but the code evolves. The last cycle of mining hardware consolidation—from 2018 to 2020—was driven by the transition from 28nm to 16nm ASIC nodes. The winners were the companies that controlled their own supply chain. The next cycle will be driven by power efficiency improvements at the system level, not just the hash chip. The companies that integrate SiC power stages, optimize thermal management, and reduce voltage drops will have a material advantage. The onsemi downgrade is a signal that the power semiconductor industry is entering a phase of commoditization, where the technological differences narrow and the battle shifts to cost. That, in turn, means lower hardware costs for miners, which means lower breakeven prices for Bitcoin. The market is currently focused on the pain of the transition, but the code of the supply chain is evolving toward greater efficiency.
Takeaway: The Next Narrative Is About Watts, Not Just Hash
So what is the next narrative to watch? It is not the price of Bitcoin, nor the hashrate. It is the cost of watts. The next major inflection point will come when the power semiconductor oversupply finally meets the next wave of mining infrastructure buildout. When that happens, the efficiency gains will be dramatic, and the miners who locked in hardware during this period of depressed component prices will reap the rewards. The onsemi downgrade is not a death knell; it is a recalibration. The signal in the noise is that the hardware supply chain is becoming more efficient, even as the financial markets panic. Follow the protocol, not the influencer. Watch the SiC wafer output, not the stock price. The math is cold, but the market is hot—and eventually, the two will converge.
